Workday is a leading provider of enterprise cloud applications for finance and human resources. Founded in 2005, Workday delivers financial management, human capital management and analytics applications designed for the world’s largest companies, educational institutions, and government agencies. Hundreds of organizations,Organizations headquartered around the globe, ranging from medium-sized businesses to Fortune 50the world's largest enterprises, have selected Workday. We achieved this leadership position through our innovative and adaptable technology, focus on the consumer Internet experience and cloud delivery model.

Organizations today operate in environments that are highly complex and changing at an increasing rate. Managers and employees must quickly synthesize vast amounts of information and react to rapid changes in global business and regulatory environments. To be successful, they need highly functional and flexible software that enables informed decision-making about the enterprise-wide allocation of their resources. Additionally, managers and employees expect to interact with enterprise systems in an open, intuitive and collaborative way, including real-time access through a wide range of mobile and computing devices. We believe that legacy, on-premise systems make those interactions difficult, as their user interfaces are not intuitive and were not originally designed for mobility.

Workday is leading the way in helping organizations better manage their financial and human capital resources. As part of our applications, we deliverprovide embedded analytics that capture the content and context of everyday business events, facilitating fast and informed decision-making from wherever users are working. In addition, we provide an intuitive user experience similar to those of leading consumer Internet sites, reducing the time for training on our applications.

We deliver our cloud applications using an innovative technology foundation that leverages the most recent advances in cloud computing and data management and allows us to deliver applications that are highly functional, flexible and fast. Our use of a multi-tenant architecture in which customers are on the same version of our software enables innovations to be deployed quickly. In addition, we use objects to represent real-world entities such as employees, benefits, budgets, charts of accounts and organizations, combining business logic and data in one place and creating actionable analytics that are part of our core transactional systems of record. Our use of in memory data management allows rapid and efficient delivery of embedded business intelligence. We also provide open, standards-based web-services application programming interfaces and pre-built packaged integrations and connectors called Cloud Connect.connectors. This shift in approach substantially reduces the need for our customers to buy and support a broad range of IT infrastructure, significantly reducing costs and complexity.

Workday Financial Management is a comprehensive, unified application built on a single, global core with a full range of financial capabilities, relevant analytics and metrics, and fully auditable process management built to help manage financial processes for global organizations.

Designed for the largest organizations in the world, Workday Human Capital Management (Workday HCM)(HCM) allows an organization to staff, pay, organize, and develop its global workforce. This unified application includes global human resources management (workforce lifecycle management, organization management, compensation, absence, and employee benefits administration) and global talent management (goal management, performance management, succession planning, and career and development planning). Workday HCM also includes project and work management designed to enable organizations to create, manage and track initiatives, build project plans and utilize project breakdown structures that include phases, tasks, and milestones.

Workday HCM is alsooffers a variety of other applications that complement and are unified with Workday RecruitingFinancial Management and Workday Payroll.HCM. Workday Recruiting is an end-to-end application that supports the needs of candidates, hiring managers, the interview team, and recruiters. Workday Payroll is a modern payroll application designed to address the full spectrum of enterprise payroll needs and provides control, accuracy and flexibility, with native payroll offerings in the U.S., Canada and United Kingdom as well as a global payroll cloud partner program to support additional customer needs. Workday Time Tracking, our time and attendance application, is designed to automate workforce management processes and thereby reduce costs and compliance risks. Workday Professional Services Automation (PSA) supports the unique needs of organizations.

We currently have hundreds ofmore than 1,200 customers, with a focus on large, global organizations. We define a customer as a separate and distinct buying entity, such as a company, an educational or government institution, or a distinct business unit of a large corporation,organization, which has entered into a master subscription agreement with us to access our cloud applications, including customers that are in the process of deploying our applications. While a single customer may have multiple organizations, operating segments or locations, we only include the customer once for this metric. We exclude from our customer count small- to medium-sized business customers who have contracted for our subscription services through oura former reseller partner.

Our current customer base spans numerous industry categories, including technology, financial services, business and professional services, healthcare and life sciences, manufacturing, consumer and retail and hospitality, education, government and government.non-profit. No individual customer represented more than 10% of our revenues in the year ended January 31, 2015.2016.

We have built a company culture centered around our customers’ success and satisfaction. We have developed several programs designed to provide customers with service options to enhance their experience with our applications. These services include 24x7 support; a professional services ecosystem that consists of our Workday consulting teams and system integrators that are trained on our applications; a Customer Success Management group to assist customers in production; and an online community to facilitate collaboration among customers and with the Workday application development teams.

As of January 31, 2015,2016, we had approximately 3,7505,200 employees. We also engage contractors and consultants. None of our employees are represented by a labor union. We have not experienced any work stoppages, and we consider our relations with our employees to be very good.

We sell substantially all of our software applicationsthe Workday Service through our direct sales organization. Our direct sales teamorganization, that is composedcomprised of insidefield sales and field sales personnel who are generally organizedsupport personnel. Workday’s field sales team is aligned by geography account size, and application type.the number of employees in a prospect account.

We generate customer leads, accelerate sales opportunities and build brand awareness through our marketing programs and through our strategic relationships. Our marketing programs target finance and HR executives, technology professionals, and senior business leaders.

As a core part of our strategy, we have developed an ecosystem of partners to both broaden and complement our application offerings and to provide a broad array of services that lie outside of Workday’s areas of focus. These relationships include software and technology partners, consulting and implementation services providers, and business process outsourcing (BPO) partners, and enable Workday to address a broader set of problems forthe finance and HR-related challenges our customers face while maintaining focus on executing against our strategy.

Our ability to compete depends in large part on our continuous commitment to product development and our ability to rapidly introduce new applications, technologies, features and functionality. Our product development organization is responsible for the design, development, testing and certification of our applications. We focus our efforts on developing new applications and core technologies and further enhancing the usability, functionality, reliability, performance, and flexibility of existing applications.

Product development expenses were $470 million, $317 million $182 million and $103$182 million for the years ended January 31, 2016, 2015 2014 and 2013,2014, respectively.

The overall market for enterprise application software is rapidly evolving, highly competitive, and subject to changing technology, shifting customer needs and frequent introductions of new applications. We currently compete with large, well-established, enterprise application software vendors, such as SAP SE (SAP) and Oracle Corporation (Oracle). SAP and SAP SE (SAP). Oracle and SAP are established enterprise software companies that have greater name recognition, larger customer bases, much longer operating histories and significantly greater financial, technical, sales, marketing, and other resources than we have and are able to provide comprehensivea broader scope of business applications that are broader in scope than our current suite of applications. We also face competition from other enterprise software vendors and from vendors of specific applications, some of which offer cloud-based solutions. These vendors include The Ultimate Software Group, Inc., Automated Data Processing, Inc. (ADP), and Infor Global Solutions, amongstamong others. We also face competition from cloud-based vendors including: providers of applications for HCM and payroll services, such as Ceridian, Inc.; providers of cloud-based expense management applications such as Concur Technologies, Inc., which was acquired by SAP; and providers of financial management applications such as NetSuite, Inc. We may also face competition from a variety of vendors of cloud-based and on-premise software applications that address only a portion of one of our applications. In addition, other cloud companies that provide services in different markets may develop solutions in our target markets, and some potential customers may elect to develop their own internal solutions. However, the domain expertise that is required for a successful solution in the areas of financial management, HCM and analytics may inhibit new entrants that are unable to invest the necessary capital to accurately reflect global requirements and regulations. We expect continued consolidation in our industry that could lead to significantly increased competition.

We believe that we compete favorably on the basis of these factors. Our ability to remain competitive will largely depend on our ongoing performance in the areas of application development and customer support.

We rely on a combination of trade secrets, patents, copyrights, and trademarks, as well as contractual protections, to establish and protect our intellectual property rights. We require our employees, contractors, consultants and other third parties to enter into confidentiality and proprietary rights agreements and control access to software, documentation and other proprietary information. Although we rely on intellectual property rights, including trade secrets, patents, copyrights and trademarks, as well as contractual protections to establish and protect our proprietary rights, we believe that factors such as the technological and creative skills of our personnel, creation of new modules, features and functionality, and frequent enhancements to our applications are more essential to establishing and maintaining our technology leadership position. Our patents begin to expire in 2017.

Despite our efforts to protect our proprietary technology and our intellectual property rights, unauthorized parties may attempt to copy or obtain and use our technology to develop applications with the same functionality as our application. Policing unauthorized use of our technology and intellectual property rights is difficult.

We expect that software and other applications in our industry may be subject to third-party infringement claims as the number of competitors grows and the functionality of applications in different industry segments overlaps. Any of these third parties might make a claim of infringement against us at any time.

We were incorporated in March 2005 in Nevada, and in June 2012 we reincorporated in Delaware. Our principal executive offices are located at 6230 Stoneridge Mall Road, Pleasanton, California 94588, and our telephone number is (877) WORKDAY. Our website address is www.workday.com. The information on, or that can be accessed through, our website is not part of this report. Workday is our registered trademark in the United States, the European Community, Canada, Norway, Switzerland, New Zealand, Hong Kong and Canada,Australia and the Workday logo, Workday Object Management Serverour Built for the Future tagline, and all of our product names are our trademarks. Other trademarks, service marks, or trade names appearing in this report are the property of their respective owners.

We file annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, proxy and information statements and amendments to reports filed or furnished pursuant to Sections 13(a), 14 and 15(d) of the Securities Exchange Act of 1934, as amended. The public may obtain these filings at the Securities and Exchange Commission (SEC)’s Public Reference Room at 100 F Street, NE, Washington, DC 20549 or by calling the SEC at 1-800-SEC-0330. The SEC also maintains a website at http://www.sec.gov that contains reports, proxy and information statements and other information regarding Workday and other companies that file materials with the SEC electronically. Copies of Workday’s reports on Form 10-K, Forms 10-Q and Forms 8-K, may be obtained, free of charge, electronically through our internet website, http://www.workday.com/company/investor_relations/sec_filings.php.

Our applications involve the storage and transmission of our customers’ proprietary information, including personal or identifying information regarding their employees, customers and suppliers, as well as their finance and payroll data. As a result, unauthorized or excessive access or security breaches could result in the loss of information, litigation, indemnity obligations and other liabilities. While we have security measures in place designed to protect customer information and prevent data loss and other security breaches, if these measures are breached as a result of third-party action, employee error, malfeasance or otherwise, and someone obtains unauthorized access to our customers’ data, our reputation could be damaged, our business may suffer and we could incur significant liabilities. Because the techniques used to obtain unauthorized access or sabotage systems change frequently and generally are not identified until they are launched against a target, we may be unable to anticipate these techniques or to implement adequate preventative measures. Any or all of these issues could negatively affect our ability to attract new customers, cause existing customers to elect to terminate or not renew their subscriptions, result in reputational damage, cause us to issue refunds or service credits to customers for prepaid and unused subscription services, or result in lawsuits, regulatory fines or other action or liabilities, which could adversely affect our operating results.

We host our applications and serve all of our customers from data centers located in Ashburn, Virginia; Lithia Springs,Atlanta, Georgia; Portland, Oregon; Dublin, Ireland; and Amsterdam, the Netherlands. While we control and have access to our servers and all of the components of our network that are located in our external data centers, we do not control the operation of these facilities. The owners of our data center facilities have no obligation to renew their agreements with us on commercially reasonable terms, or at all. If we are unable to renew these agreements on commercially reasonable terms, or if one of our data center operators is acquired, we may be required to transfer our servers and other infrastructure to new data center facilities, and we may incur significant costs and possible service interruption in connection with doing so.

In addition, we rely upon Amazon Web Services (AWS), which provides a distributed computing infrastructure platform for business operations, to operate certain aspects of our services, such as environments for development testing, training and sales demonstrations. Given this, along with the fact that we cannot easily switch our AWS operations to another cloud provider, any disruption of or interference with our use of AWS would impact our operations and our business could be adversely impacted.

Problems faced by our third-party data center operations, with the telecommunications network providers with whom we or they contract, or with the systems by which our telecommunications providers allocate capacity among their customers, including us, or problems faced by AWS, could adversely affect the experience of our customers. Our third-party data center operators could decide to close their facilities without adequate notice. In addition, any financial difficulties, such as bankruptcy, faced by our third-party data center operators or any of the service providers with whom we or they contract may have negative effects on our business, the nature and extent of which are difficult to predict. Additionally, if our data centers or AWS are unable to keep up with our growing needs for capacity, this could have an adverse effect on our business. Any changes in third-party service levels at our data centers or at AWS or any errors, defects, disruptions, or other performance problems with our applications could adversely affect our reputation and may damage our customers’ stored files or result in lengthy interruptions in our services. Interruptions in our services might adversely affect our reputation and operating results, cause us to issue refunds or service credits to customers for prepaid and unused subscription services, subject us to potential liabilities, result in contract terminations, or adversely affect our renewal rates.

Furthermore, our financial management application is essential to Workday's and our customers’ financial projections, reporting and compliance programs, particularly customers who are public reporting companies. Any interruption in our service may affect the

We have experienced significant growth in the number of users, transactions and data that our operations infrastructure supports. We seek to maintain sufficient excess capacity in our operations infrastructure to meet the needs of all of our customers.customers, and to ensure that our services and solutions are accessible within an acceptable load time. We also seek to maintain excess capacity to facilitate the rapid provision of new customer deployments and the expansion of existing customer deployments. In addition, we need to properly manage our technological operations infrastructure in order to support version control, changes in hardware and software parameters, updates, the evolution of our applications and to reduce infrastructure latency associated with dispersed geographic locations. However, the provision of new hosting infrastructure requires significant lead time. If we do not accurately predict our infrastructure requirements, our existing customers may experience service outages. If our operations infrastructure fails to scale, customers may experience delays as we seek to obtain additional capacity.

We have experienced, and may in the future experience, system disruptions, outages and other performance problems. These problems may be caused by a variety of factors, including infrastructure changes, human or software errors, viruses, security attacks (internal and external), fraud, spikes in customer usage and denial of service issues. In some instances, we may not be able to identify the cause or causes of these performance problems within an acceptable period of time. Our customer agreements typically provide service level commitments on a monthly basis. If we are unable to meet the stated service level commitments or suffer extended periods of unavailability for our applications, we may be contractually obligated to issue refunds or service credits to customers for prepaid and unused subscription services, or we could face contract terminations. Any extended service outages could result in customer losses, and adversely affect our reputation, revenues and operating results.

Our corporate headquarters are located in Pleasanton, California and we have data centers located in Ashburn, Virginia; Lithia Springs,Atlanta, Georgia; Portland, Oregon; Sacramento, California; Dublin, Ireland; and Amsterdam, the Netherlands. We also rely on AWS’s distributed computing infrastructure platform. The west coast of the United States contains active earthquake zones and the southeast is subject to seasonal hurricanes. Additionally, we rely on our network and third-party infrastructure and enterprise applications, internal technology systems and our website for our development, marketing, operational support, hosted services and sales activities. In the event of a major earthquake, hurricane or catastrophic event such as fire, power loss, telecommunications failure, cyber-attack, war or terrorist attack, we may be unable to continue our operations and may endure system interruptions, reputational harm, delays in our application development, lengthy interruptions in our services, breaches of data security and loss of critical data, all of which could have an adverse effect on our operating results.

Our customers can use our applications to collect, use and store personal or identifying information regarding their employees, customers and suppliers. National and local governments and agencies in the countries in which our customers operate have adopted, are considering adopting, or may adopt laws and regulations regarding the collection, use, storage, processing and disclosure of personal information obtained from consumers and individuals. Theseindividuals, which could impact our ability to offer our services in certain jurisdictions or our customers' ability to deploy our solutions globally. Privacy-related laws are particularly stringent in Europe. IfThe costs of compliance with and other burdens imposed by privacy-related laws, regulations and standards may limit the use and adoption of our services, reduce overall demand for our services, lead to significant fines, penalties or liabilities for noncompliance, or slow the pace at which we close sales transactions, any of which could harm our business. Moreover, if Workday employees fail to adhere to adequate data protection practices around the usage of our customer’s personal data, it may damage our reputation and brand. In addition,

Additionally, we expect that existing laws, regulations and standards may be interpreted in new and differing manners in the affected customers or government authoritiesfuture, and may be inconsistent among jurisdictions. For example, the European Court of Justice in October 2015 issued a ruling immediately invalidating the U.S.-EU Safe Harbor Framework, which facilitated personal data transfers to the U.S. in compliance with applicable European data protection laws. While we do not depend upon the U.S.-EU Safe Harbor Framework for transferring European personal data to the U.S., there is regulatory uncertainty surrounding how data transfers from the European Union to the U.S. will be authorized in the future and different European data protection regulators could initiate legal or regulatory action against usapply differing standards for the transfer of personal data. Future laws, regulations, standards and other obligations, and changes in connection with such incidents, whichthe interpretation of existing laws, regulations, standards and other obligations could result in significant fines, penaltiesincreased regulation, cost of compliance and liabilities.limitations on data collection, use, disclosure and transfer for Workday and our customers, which could decrease demand for our applications, require us to restrict our business operations, and impair our ability to maintain and grow our customer base and increase our revenue.

The costs of compliance with, and other burdens imposed by, privacy laws and regulations that are applicable to the businesses of our customers may adversely affect our customers’ ability and willingness to process, handle, store, use and transmit demographic and personal information of their employees, customers and suppliers, which could limit the use, effectiveness and adoption of our applications and reduce overall demand. Even the perception of privacy concerns, whether or not valid, may inhibit marketthe adoption, effectiveness or use of our applications.

In addition to government activity, privacy advocacy groups and the technology and other industries are consideringhave established or may establish various new, additional or different self-regulatory standards that may place additional burdens on us. Our customers may expect us to meet voluntary certifications, such as ISO 27018 or other standards established by third parties, such as TRUSTe. If the processing of personal information werewe are unable to be curtailed in this manner, our software applications would be less effective, which maymaintain these certifications or meet these standards, it could reduce demand for our applications and adversely affect our business.

We have experienced, and are continuing to experience, a period of rapid growth in our customers, headcount and operations. In particular, we grew from approximately 300 employees as of December 31, 2008 to approximately 3,7505,200 employees as of January 31, 2015,2016, and have also significantly increased the size of our customer base. We anticipate that we will significantly expand our operations and headcount in the near term, and will continue to expand our customer base. This growth has placed, and future growth will place, a significant strain on our management, general and administrative resources and operational infrastructure. Our success will depend in part on our ability to manage this growth effectively and to scale our operations. To manage the expected growth of our operations and personnel, we will need to continue to improve our operational, financial and management controls and our reporting systems and procedures. As we continue to grow, we also need to ensure that our policies and procedures evolve to reflect our current operations and are appropriately communicated to and observed by employees, and that we appropriately manage our corporate information assets, including confidential and proprietary information. Failure to effectively manage growth could result in difficulty or delays in deploying customers, declines in quality or customer satisfaction, increases in costs, difficulties in introducing new features or other operational difficulties, and any of these difficulties could adversely impact our business performance and results of operations.

Our success depends largely upon the continued services of our executive officers. We also rely on our leadership team in the areas of product development, marketing, sales, services and general and administrative functions, and on mission-critical individual contributors in product development. From time to time, there may be changes in our executive management team resulting from the hiring or departure of executives, which could disrupt our business. We do not have employment agreements with our executive officers or other key personnel that require them to continue to work for us for any specified period and therefore, they could terminate their employment with us at any time. The loss of one or more of our executive officers or key employees and any failure to develop an appropriate succession plan for these persons could have a serious adverse effect on our business.

To execute our growth plan, we must attract and retain highly qualified personnel, and our managers must be successful in hiring employees who are a good cultural fit and have the competencies to succeed at Workday. Competition for these personnel is intense, especially for engineers with high levels of experience in designing and developing software and Internet-related services and senior sales executives. From time to time, we have experienced, and we expect to continue to experience, difficulty in hiring and retaining employees with appropriate qualifications, and may not be able to fill positions in desired geographic areas or at all.

Many of the companies with which we compete for experienced personnel have greater resources than we have and some of these companies may offer greater compensation packages. Particularly in the San Francisco Bay Area, job candidates and existing employees carefully consider the value of the stockequity awards they receive in connection with their employment. If the perceived value of our stockequity awards declines, or if the mix of equity and cash compensation that we offer is unattractive, it may adversely affect our ability to recruit and retain highly skilled employees. Job candidates may also be threatened with legal action by their existing employers if we hire them, which could have a chilling effect on hiring and result in a diversion of our time and resources. We must also continue to retain and motivate existing employees through our compensation practices, company culture and career development opportunities. If we fail to attract new personnel or to retain our current personnel, our business and future growth prospects could be adversely affected.

We believe that a critical component of our success has been our corporate culture, as reflected in our core values: employees, customer service, innovation, integrity and fun. We have invested substantial time and resources in building our team. As we continue to grow and develop the infrastructure associated with being a public company, we will need to maintain our corporate culture among a larger number of employees. Any failure to preserve our culture could negatively affect our future success, including our ability to retain and recruit personnel and to effectively focus on and pursue our corporate objectives.

The markets for financial management and HCM applications are highly competitive, with relatively low barriers to entry for some applications or services. Our primary competitors are SAP and Oracle, well-established providers of financial management and HCM applications, which have long-standing relationships with many customers. Some customers may be hesitant to switch vendors or to adopt cloud applications such as ours, and prefer to maintain their existing relationships with competitors. SAP and Oracle are larger and have greater name recognition, much longer operating histories, larger marketing budgets and significantly greater resources than we do. These vendors, as well as other competitors, could offer financial management and HCM applications on a standalone basis at a low price or bundled as part of a larger product sale. In order to take advantage of customer demand for cloud applications, legacy vendors are expanding their cloud applications through acquisitions, strategic alliances and organic development. Legacy vendors may also seek to partner with other leading cloud providers, such as the alliance between Oracle and Salesforce.com. We also face competition from custom-built software vendors and from vendors of specific applications, some of which offer cloud-based solutions. These vendors include, without limitation: The Ultimate Software Group, Inc., Automatic Data Processing and Infor Global Solutions. We also face competition from cloud-based vendors including providers of applications for HCM and payroll services such as Ceridian; providers of cloud-based expense management applications such as Concur Technologies, Inc. (which was acquired by SAP);Ceridian and providers of financial management applications such as NetSuite, Inc. We may also face competition from a variety of vendors of cloud-based and on-premise software applications that address only a portion of one of our applications. In addition, other companies that provide cloud applications in different target markets may develop applications or acquire companies that operate in our target markets, and some potential customers may elect to develop their own internal applications. With the introduction of new technologies and market entrants, we expect this competition to intensify in the future.

Many of our competitors are able to devote greater resources to the development, promotion and sale of their products and services. Furthermore, our current or potential competitors may be acquired by third parties with greater available resources and the ability to initiate or withstand substantial price competition. In addition, many of our competitors have established marketing relationships, access to larger customer bases and major distribution agreements with consultants, system integrators and resellers. Our competitors may also establish cooperative relationships among themselves or with third parties that may further enhance their product offerings or resources. If our competitors’ products, services or technologies become more accepted than our applications, if they are successful in bringing their products or services to market earlier than ours, or if their products or services are more technologically capable than ours, then our revenues could be adversely affected. In addition, some of our competitors may offer their products and services at a lower price. If we are unable to achieve our target pricing levels, our operating results would be negatively affected. Pricing pressures and increased competition could result in reduced sales, reduced margins, losses or a failure to maintain or improve our competitive market position, any of which could adversely affect our business.

The enterprise cloud computing market is not as mature as the market for on-premise enterprise software. Our success will depend to a substantial extent on the continued growth of cloud computing in general, and of financial management and HCM services in particular. Many enterprises have invested substantial personnel and financial resources to integrate traditional enterprise software into their businesses, and therefore may be reluctant or unwilling to migrate to cloud computing. It is difficult to predict customer adoption rates and demand for our applications, the future growth rate and size of the cloud computing market or the entry of competitive applications. The continued expansion of the cloud computing market depends on a number of factors, including the cost, performance, and perceived value associated with cloud computing, as well as the ability of cloud computing companies to address security and privacy concerns. Further, the cloud computing market is less developed in many jurisdictions outside of the United States. If we or other cloud computing providers experience security incidents, loss of customer data, disruptions in delivery or other problems, the market for cloud computing applications as a whole, including our applications, may be negatively affected. If there is a reduction in demand for cloud computing caused by a lack of customer acceptance, technological challenges, weakening economic conditions, security or privacy concerns, competing technologies and products, decreases in corporate spending or otherwise, it could result in decreased revenues or growth rates and our business could be adversely affected.

To date, we have derived a substantial majority of our subscription services revenues from our HCM application. Any factor adversely affecting sales of this application, including application release cycles, market acceptance, product competition, performance and reliability, reputation, price competition, and economic and market conditions, could adversely affect our business

If we are unable to provide enhancements and new features for our existing applications or new applications that achieve market acceptance or that keep pace with rapid technological developments, our business could be adversely affected. For example, we are focused on enhancing the features and functionality of our applications to enhance their utility to larger customers with complex, dynamic and global operations. The success of enhancements, new features and applications depends on several factors, including the timely completion, introduction and market acceptance of the enhancements or new features or applications. Failure in this regard may significantly impair our revenue growth. In addition, because our applications are designed to operate on a variety of systems, we will need to continuously modify and enhance our applications to keep pace with changes in Internet-related hardware, iOS, Android and other mobile-related technologies and other software, communication, browser and database technologies. We may not be successful in either developing these modifications and enhancements or in bringing them to market in a timely fashion. We must also appropriately balance the product capability demands of our current customers with the capabilities required to address the broader market. Furthermore, uncertainties about the timing and nature of new network platforms or technologies, or modifications to existing platforms or technologies, could increase our product development expenses. Any failure of our applications to operate effectively with future network platforms and technologies could reduce the demand for our applications, result in customer dissatisfaction and adversely affect our business.

Our applications must integrate with a variety of technologies and we will need tomust continuously modify and enhance our applications to adapt to changes in operating systems, hardware, software, communication, browser and database technologies. Any failure of our solutions to operate effectively with future technologies or our failure to respond to changes in a timely and effective manner could reduce the demand for our applications, result in customer dissatisfaction and harm our operating results and business.

Our applications are inherently complex and may contain material defects or errors. Any defects in functionality or that cause interruptions in the availability of our applications could result in:

The costs incurred in correcting any material defects or errors might be substantial and could adversely affect our operating results.

Because of the large amount of data that we collect and manage,process, it is possible that hardware failures or errors in our systems could result in data loss or corruption, or cause the information that we collect to be incomplete or contain inaccuracies that our customers regard as significant. Furthermore, the availability or performance of our applications could be adversely affected by a number of factors, including customers’ inability to access the Internet, the failure of our network or software systems, security breaches or variability in user traffic for our services. We may be required to issue credits or refunds for prepaid amounts related to unused services or otherwise be liable to our customers for damages they may incur resulting from certain of these events. For example, our customers access our applications through their Internet service providers. If a service provider fails to provide sufficient capacity to support our applications or otherwise experiences service outages, such failure could interrupt our customers’ access to our applications, which could adversely affect their perception of our applications’ reliability and our revenues. In addition to potential liability, if we experience interruptions in the availability of our applications, our reputation could be adversely affected and we could lose customers.

Our errors and omissions insurance may be inadequate or may not be available in the future on acceptable terms, or at all. In addition, our policy may not cover all claims made against us and defending a suit, regardless of its merit, could be costly and divert management’s attention.

Our ability to increase revenues and achieve and maintain profitability depends, in large part, on widespread acceptance of our applications by large businesses and other organizations. As we target our sales efforts at these customers, we face greater costs, longer sales cycles and less predictability in completing some of our sales. In the large enterprise market, the customer’s decision to use our applications may be an enterprise-wide decision and, therefore, these types of sales require us to provide greater levels of education regarding the use and benefits of our applications. In addition, our target customers may prefer to purchase applications that are critical to their business from one of our larger, more established competitors. Our typical sales cycles are six to twelve months, and we expect that this lengthy sales cycle may continue or increase as customers adopt our applications beyond HCM. Longer sales cycles could cause our operating and financial results to suffer in a given period.

Our customers’ deployment timeframes vary based on many factors including the number and type of applications being deployed, the complexity and scale of the customers’ businesses, the configuration requirements, the number of integrations with other systems and other factors, many of which are beyond our control.

We rely on our reputation and recommendations from key customers in order to promote subscriptions to our applications. The loss of, or failure to renew by, any of our key customers could have a significant impact on our revenues, reputation and our ability to obtain new customers. In addition, acquisitions of our customers could lead to cancellation of our contracts with those customers or by the acquiring companies, thereby reducing the number of our existing and potential customers. Acquisitions of our partners could also result in a decrease in the number of our current and potential customers, as our partners may no longer facilitate the adoption of our applications.

Our business depends on our ability to satisfy our customers, both with respect to our application offerings and the professional services that are performed to help our customers use features and functions that address their business needs. Professional services may be performed by our own staff, by a third party, or by a combination of the two. Our strategy is to work with third parties to increase the breadth of capability and depth of capacity for delivery of these services to our customers, and third parties provide a majority of our deployment services. If customers are not satisfied with the quality of work performed by us or a third party or with the type of professional services or applications delivered, then we could incur additional costs to address the situation, the profitabilityrevenue recognition of that work mightthe contract could be impaired,impacted, and the dissatisfaction with our services could damage our ability to expand the applications subscribed to by our customers. We must also align our product development and professional services operations in order to ensure that customers’ evolving needs are met. Negative publicity related to our customer relationships, regardless of its accuracy, may further damage our business by affecting our ability to compete for new business with current and prospective customers.

Once our applications are deployed, our customers depend on our support organization to resolve technical issues relating to our applications. We may be unable to respond quickly enough to accommodate short-term increases in customer demand for support services. We also may be unable to modify the format of our support services to compete with changes in support services provided by our competitors. Increased customer demand for these services, without corresponding revenues, could increase costs and adversely affect our operating results. In addition, our sales process is highly dependent on our applications and business reputation and on positive recommendations from our existing customers. Any failure to maintain high-quality technical support, or a market perception that we do not maintain high-quality support, could adversely affect our reputation, our ability to sell our applications to existing and prospective customers, and our business, operating results and financial position.

A key element of our growth strategy is to expand our international operations and develop a worldwide customer base. To date, we have not realized a substantial portion of our revenues from customers headquartered outside the United States. Operating in international markets requires significant resources and management attention and will subject us to regulatory, economic and political risks that are different from those in the United States. Because of our limited experience with international operations, our international expansion efforts may not be successful in creating demand for our applications outside of the United States or in effectively selling subscriptions to our applications in all of the international markets we enter. In addition, we will face risks in doing business internationally that could adversely affect our business, including:

Today, our international contracts generally are not denominated in local currencies. However, theThe majority of our international costs are denominated in local currencies. WeIn addition, we anticipate that over time, an increasing portion of our international sales contracts may be denominated in local currencies. Therefore, fluctuations in the value of the U.S. dollar and foreign currencies may impact our operating results when translated into U.S. dollars. We have a limited hedging program but we cannot assure that this hedging program will be effective and we will continue to have risk of exchange rate fluctuations on the majority of our foreign currency transactions.fluctuations.

We have acquired, and may in the future acquire, other companies, employee teams or technologies to complement or expand our applications, enhance our technical capabilities, obtain personnel or otherwise offer growth opportunities. The pursuit of acquisitions may divert the attention of management and cause us to incur various expenses in identifying, investigating and pursuing suitable acquisitions, whether or not they are consummated.

We have limited experience in acquisitions. We may not be able to integrate acquired personnel, operations and technologies successfully or effectively manage the combined operations following the acquisition. We also may not achieve the anticipated benefits from the acquisitions due to a number of factors, including:

In addition, a significant portion of the purchase price of companies we acquire may be allocated to acquired goodwill and other intangible assets, which must be assessed for impairment at least annually. In the future, if our acquisitions do not yield expected returns, we may be required to take charges to our operating results based on this impairment assessment process, which could adversely affect our results of operations.

Acquisitions could also result in dilutive issuances of equity securities or the incurrence of debt, which could adversely affect our operating results. In addition, if an acquired business fails to meet our expectations, our operating results, business and financial position may suffer.

We have incurred significant losses in each period since our inception in 2005. These losses and our accumulated deficit reflect the substantial investments we made to acquire new customers and develop our applications. We expect our operating expenses to increase in the future due to anticipated increases in sales and marketing expenses, product development expenses, operations costs and general and administrative costs, and therefore we expect our losses to continue for the foreseeable future. Furthermore, to the extent we are successful in increasing our customer base, we will also incur increased losses in the acquisition period because costs associated with acquiring customers are generally incurred up front, while subscription services revenues are generally recognized ratably over the terms of the agreements, which are typically three years. You should not consider our recent growth in revenues as indicative of our future performance. Accordingly, we cannot assure you that we will achieve profitability in the future, nor that, if we do become profitable, we will sustain profitability.

Developing software applications is expensive and the investment in product development often involves a long return on investment cycle. We have made and expect to continue to make significant investments in development and related product opportunities. Accelerated product introductions and short product life cycles require high levels of expenditures that could adversely affect our operating results if not offset by revenue increases. We believe that we must continue to dedicate a significant amount of resources to our development efforts to maintain our competitive position. However, we may not receive significant revenues from these investments for several years, if at all.

Our ability to forecast our future rate of growth is limited and subject to a number of uncertainties, including general economic and market conditions. We plan our expense levels and investment on estimates of future revenue and future anticipated rates of growth. We may not be able to adjust our spending quickly enough if our growth rates fall short of our expectations.

Moreover, we have encountered and will encounter risks and uncertainties frequently experienced by growing companies in rapidly changing industries, such as the risks and uncertainties described herein. If our assumptions regarding these risks and uncertainties (which we use to plan our business) are incorrect or change due to changes in our markets, or if we do not address these risks successfully, our operating and financial results could differ materially from our expectations and our business could suffer.

You should not consider our historical revenue growth rates as indicative of our future performance. Our revenue growth rates have declined, and may decline in future periods, as the size of our customer base increases and as we achieve higher market penetration rates. Other factors may also contribute to declines in our growth rates, including slowing demand for our products,services, increasing competition, a decrease in the growth of our overall market, our failure to continue to capitalize on growth opportunities, and the maturation of our business, among others. As our growth rates decline, investors’ perceptions of our business and the trading price of our securities could be adversely affected.

We generally recognize subscription services revenues from customers ratably over the terms of their contracts, which are typically three years. As a result, most of the subscription services revenues we report in each quarter are derived from the recognition of unearned revenue relating to subscriptions entered into during previous quarters. Consequently, a decline in new or renewed subscriptionssubscription contracts in any single quarter will likely have a minor impact on our revenue results for that quarter. However, such a decline will negatively affect our revenues in future quarters. Accordingly, the effect of significant downturns in sales and market acceptance of our applications, and potential changes in our pricing policies or rate of renewals, may not be fully reflected in our results of operations until future periods. We may be unable to adjust our cost structure to reflect the changes in revenues. In addition, a significant majority of our costs are expensed as incurred, while revenues are recognized over the life of the customer agreement. As a result, increased growth in the number of our customers could result in our recognition of more costs than revenues in the earlier periods of the terms of our agreements. Our subscription model also makes it difficult for us to rapidly increase our revenues through additional sales in any period, as subscription revenues from new customers generally are recognized over the applicable subscription term.

As the markets for our applications mature, or as new competitors introduce new products or services that compete with ours, we may be unable to attract new customers at the same price or based on the same pricing model as we have used historically. Moreover, large customers, which are the focus of our sales efforts, may demand greater price concessions. As a result, in the future we may be required to reduce our prices, which could adversely affect our revenues, gross margin, profitability, financial position and cash flow.

In addition, our customers have no obligation to renew their subscriptions for our applications after the expiration of the initial subscription period. Our customers may renew for fewer elements of our applications or on different pricing terms. Our customers’ renewal rates may decline or fluctuate as a result of a number of factors, including their level of satisfaction with our pricing or our applications and their ability to continue their operations and spending levels. If our customers do not renew their subscriptions for our applications on similar pricing terms, our revenues may decline and our business could suffer. In addition, over time the average term of our contracts could change based on renewal rates or for other reasons.

Our future success also depends in part on our ability to sell additional features or enhanced elements of our applications to our current customers. This may require increasingly costly sales efforts that are targeted at senior management. If these efforts are not successful, our business may suffer.

We will need to continue to expand and optimize our sales infrastructure in order to grow our customer base and our business. We plan to continue to expand our direct sales force, both domestically and internationally. Identifying and recruiting qualified personnel and training them in the use of our software requires significant time, expense and attention. It can take nine months or longersignificant time before our sales representatives are fully trained and productive. Our business may be adversely affected if our efforts to expand and train our direct sales force do not generate a corresponding increase in revenues. In particular, if we are unable to hire, develop and retain talented sales personnel or if new direct sales personnel are unable to achieve desired productivity levels in a reasonable period of time, we may not be able to realize the expected benefits of this investment or increase our revenues.

We believe that developing and maintaining widespread positive awareness of our brand in a cost-effective manner is critical to achieving widespread acceptance of our applications, and attracting new customers.customers and hiring and retaining employees. Brand promotion activities may not generate customer awareness or increase revenues, and even if they do, any increase in revenues may not offset the expenses we incur in building our brand. If we fail to successfully promote and maintain our brand, or incur substantial expenses, we may fail to attract or retain customers necessary to realize a sufficient return on our brand-building efforts, or to achieve the widespread brand awareness that is critical for broad customer adoption of our applications. In addition, if our brand is negatively impacted, it may be more difficult to hire and retain employees.

In order to grow our business, we anticipate that we will continue to depend on relationships with third parties, such as deployment partners, and technology and content providers. Identifying partners, and negotiating and documenting relationships with them, requires significant time and resources. Our competitors may be effective in providing incentives to third parties to favor their products or services or to prevent or reduce subscriptions to our services. In addition, acquisitions of our partners by our competitors could result in a decrease in the number of our current and potential customers, as our partners may no longer facilitate the adoption of our applications by potential customers.

If we are unsuccessful in establishing or maintaining our relationships with third parties, our ability to compete in the marketplace or to grow our revenues could be impaired and our operating results may suffer. Even if we are successful, we cannot assure you that these relationships will result in increased customer usage of our applications or increased revenues.

Our business depends on the overall demand for enterprise software and on the economic health of our current and prospective customers. Any significant weakening of the economy in the United States or Europe and of the global economy, more limited availability of credit, a reduction in business confidence and activity, decreased government spending, and other difficulties may affect one or more of the sectors or countries in which we sell our applications. In addition, a strong dollar could reduce demand for our products in countries with relatively weaker currencies. These adverse conditions could result in reductions in sales of our applications, longer sales cycles, reductions in subscription duration and value, slower adoption of new technologies and increased price competition. Any of these events would likely have an adverse effect on our business, operating results and financial position. In addition, there can be no assurance that enterprise software spending levels would increase following any recovery.

Our success and ability to compete depend in part upon our intellectual property. We rely on patent, copyright, trade secret and trademark laws, trade secret protection and confidentiality or license agreements with our employees, customers, partners and others to protect our intellectual property rights. However, the steps we take to protect our intellectual property rights may be inadequate.

We may be required to spend significant resources to monitor and protect our intellectual property rights. Litigation brought to protect and enforce our intellectual property rights could be costly, time-consuming and distracting to management and could result in the impairment or loss of portions of our intellectual property. Furthermore, our efforts to enforce our intellectual property rights may be met with defenses, counterclaims and countersuits attacking the validity and enforceability of our intellectual property rights. Our failure to secure, protect and enforce our intellectual property rights could seriously adversely affect our brand and our business.

There is considerable patent and other intellectual property development activity in our industry. Our competitors, as well as a number of other entities and individuals, may own or claim to own intellectual property relating to our industry. From time to time, third parties may claim that we are infringing upon their intellectual property rights, and we may be found to be infringing upon such rights. In the future, they may claim that our applications and underlying technology infringe or violate their intellectual property rights, even if we are unaware of the intellectual property rights that others may claim cover some or all of our technology or services. Any claims or litigation could cause us to incur significant expenses and, if successfully asserted against us, could require that we pay substantial damages or ongoing royalty payments, prevent us from offering our services, or require that we comply with other unfavorable terms. We may also be obligated to indemnify our customers or business partners or pay substantial settlement costs, including royalty payments, in connection with any such claim or litigation and to obtain licenses, modify applications, or refund fees, which could be costly. Even if we were to prevail in such a dispute, any litigation regarding our intellectual property could be costly and time-consuming and divert the attention of our management and key personnel from our business operations.

Some of our applications include software covered by open source licenses, which may include, by way of example, GNU General Public License and the Apache License. The terms of various open source licenses have not been interpreted by United States courts, and there is a risk that such licenses could be construed in a manner that imposes unanticipated conditions or restrictions on our ability to market our applications. By the terms of certain open source licenses, we could be required to release the source code of our proprietary software, and to make our proprietary software available under open source licenses, if we combine our proprietary software with open source software in a certain manner. In the event that portions of our proprietary software are determined to be subject toimpacted by an open source license, we could be required to publicly release the affected portions of our source code, re-engineer all or a portion of our technologies, or otherwise be limited in the licensing of our technologies, each of which could reduce or eliminate the value of our technologies and services. In addition to risks related to license requirements, usage of open source software can lead to greater risks than use of third party commercial software, as open source licensors

Our applications incorporate certain third-party software obtained under licenses from other companies. We anticipate that we will continue to rely on such third-party software and development tools from third parties in the future. Although we believe that there are commercially reasonable alternatives to the third-party software we currently license, this may not always be the case, or it may be difficult or costly to replace. In addition, integration of the software used in our applications with new third-party software may require significant work and require substantial investment of our time and resources. To the extent that our applications depend upon the successful operation of third-party software in conjunction with our software, any undetected errors or defects in this third-party software could prevent the deployment or impair the functionality of our applications, delay new application introductions, result in a failure of our applications and injure our reputation. Our use of additional or alternative third-party software would require us to enter into license agreements with third parties.

Federal, state or foreign government bodies or agencies have in the past adopted, and may in the future adopt, laws or regulations relating to Internet usage. Changes in these laws or regulations could require us to modify our applications in order to comply with these laws or regulations. In addition, government agencies or private organizations may begin to impose taxes, fees or other charges for accessing the Internet or commerce conducted via the Internet. These laws or charges could limit the growth of Internet-related commerce or communications, or negatively impact demand for Internet-based applications such as ours.

In addition, businesses could be adversely affected due to delays in the development or adoption of new standards and protocols to handle increased demands of Internet activity, security, reliability, cost, ease of use, accessibility, and quality of service. Businesses have been adversely affected by “viruses,” “worms” and similar malicious programs and have experienced a variety of outages and other delays as a result of damage to Internet infrastructure. These issues could negatively impact demand for our cloud-based applications.

As a public company, we are required to design and maintain proper and effective internal controls over financial reporting and to report any material weaknesses in such internal controls. Section 404 of the Sarbanes-Oxley Act of 2002 (the Sarbanes-Oxley Act) requires that we evaluate and determine the effectiveness of our internal controls over financial reporting and provide a management report on the internal controls over financial reporting, which must be attested to by our independent registered public accounting firm. If we have a material weakness in our internal controls over financial reporting, we may not detect errors on a timely basis and our financial statements may be materially misstated.

The process of compiling the system and processing documentation necessary to perform the evaluation needed to comply with Section 404 is challenging and costly. In the future, we may not be able to complete our evaluation, testing and any required remediation in a timely fashion. If we identify material weaknesses in our internal controls over financial reporting, if we are unable to comply with the requirements of Section 404 in a timely manner, if we are unable to assert that our internal controls over financial reporting are effective, or if our independent registered public accounting firm is unable to express an opinion as to the effectiveness of our internal controls over financial reporting, investors may lose confidence in the accuracy and completeness of our financial reports and the market price of our securities could be negatively affected, and we could become subject to investigations by the New York Stock Exchange (NYSE), the SEC, or other regulatory authorities, which could require additional financial and management resources. In addition, because we use Workday's financial management application, any problems that we experience with financial reporting and compliance could be negatively perceived by prospective or current customers, and negatively impact demand for our applications.

We are subject to the reporting requirements of the Securities Exchange Act, of 1934, as amended, (the Exchange Act), the Sarbanes-Oxley Act, the Wall Street Reform and Consumer Protection Act (the Dodd-Frank Act), the listing requirements of the NYSE and other applicable securities rules and regulations. Compliance with these rules and regulations has increased and will continue to increase our legal and financial compliance costs, make some activities more difficult, time-consuming or costly, and increase demand on our systems and resources. In particular, we have incurred and expect to continue to incur significant expenses and devote substantial management effort toward ensuring compliance with the requirements of Section 404 of the Sarbanes-Oxley Act. The Sarbanes-Oxley Act requires, among other things, that we maintain effective disclosure controls and procedures and internal control over financial reporting. In order to maintain and, if required, improve our disclosure controls and procedures and internal control over financial reporting to meet this standard, significant resources and management oversight may be required. As a result, management’s attention may be diverted from other business concerns, which could harm our business and operating results.

In addition, changing laws, regulations and standards relating to corporate governance and public disclosure are creating uncertainty for public companies, increasing legal and financial compliance costs and making some activities more time consuming. These laws, regulations and standards are subject to varying interpretations, in many cases due to their lack of specificity, and, as a result, their application in practice may evolve over time as new guidance is provided by regulatory and governing bodies. This could result in continuing uncertainty regarding compliance matters and higher costs necessitated by ongoing revisions to disclosure and governance practices. We intend to invest resources to comply with evolving laws, regulations and standards, and this investment may result in increased general and administrative expenses and a diversion of management’s time and attention from revenue-generating activities to compliance activities. If our efforts to comply with new laws, regulations and standards differ from the activities intended by regulatory or governing bodies due to ambiguities related to practice, regulatory authorities may initiate legal proceedings against us and our business may be harmed.

The application ofWe operate and are subject to taxes in the United States and numerous foreign jurisdictions throughout the world. Changes to federal, state, local andor international tax laws to services provided electronically is evolving. Newon income, sales, use, indirect or other tax laws, statutes, rules, regulations or ordinances could be enacted at any time (possibly with retroactive effect),on multinational corporations are currently being considered by the United States and other countries where we do business. These contemplated legislative initiatives include, but not limited to, changes to transfer pricing policies and definitional changes to permanent establishment could be applied solely or disproportionately to services provided over the Internet. These enactmentscontemplated tax initiatives, if finalized and adopted by countries, may ultimately impact our effective tax rate and could adversely affect our sales activity due to the inherent cost increase the taxes would represent and ultimately resultresulting in a negative impact on our operating results and cash flows.

In addition, existing tax laws, statutes, rules, regulations or ordinances could be interpreted, changed, modified or applied adversely to us (possibly with retroactive effect), which could require us or our customers to pay additional tax amounts, as well as require us or our customers to pay fines or penalties and interest for past amounts. If we are unsuccessful in collecting such taxes from our customers, we could be held liable for such costs, thereby adversely impacting our operating results and cash flows. If our customers must pay additional fines or penalties, it could adversely affect demand for our services.

Generally accepted accounting principles in the United States are subject to interpretation by the Financial Accounting Standards Board (FASB), the SEC, and various bodies formed to promulgate and interpret appropriate accounting principles. A

As of January 31, 2015,2016, our co-founder and Chairman David Duffield, together with his affiliates, held voting rights with respect to 67.766 million shares of Class B common stock and 0.21 million shares of Class A common stock. In addition, Mr. Duffield holds 0.1 million restricted stock units,RSUs, which will be settled in an equivalent number of shares of Class A common stock. As of January 31, 2015,2016, our co-founder and CEO Aneel Bhusri, together with his affiliates, held voting rights with respect to 7.17 million shares of Class B common stock and 0.1 million shares of Class A common stock. In addition, Mr. Bhusri holds exercisable options to acquire 3.23 million shares of Class B common stock, 1.01 million shares of Class B restricted stock and 0.20.3 million restricted stock units,RSUs, which will be settled in an equivalent number of shares of Class A common stock. Further, Messrs. Duffield and Bhusri have entered into a voting agreement under which each has granted a voting proxy with respect to certain Class B common stock beneficially owned by him effective upon his death or incapacity as described in our registration statement on Form S-1 filed in connection with our initial public offering. Messrs. Duffield and Bhusri have each initially designated the other as their respective proxies. Accordingly, upon the death or incapacity of either Mr. Duffield or Mr. Bhusri, the other would individually continue to control the voting of shares subject to the voting proxy. Collectively, the shares described above represent a substantial majority of the voting power of our outstanding capital stock. As a result, Messrs. Duffield and Bhusri have the ability to control the outcome of matters submitted to our stockholders for approval, including the election of directors and any merger, consolidation, or sale of all or substantially all of our assets. In addition, they have the ability to control the management and affairs of our company as a result of their positions as our Chairman and CEO, respectively, and their ability to control the election of our directors. As board members and officers, Messrs. Duffield and Bhusri owe a fiduciary duty to our stockholders and must act in good faith in a manner they reasonably believe to be in the best interests of our stockholders. As stockholders, even as controlling stockholders, they are entitled to vote their shares in their own interests, which may not always be in the interests of our stockholders generally.

Our Class B common stock has ten votes per share and our Class A common stock, which is the stock that is currently publicly traded, has one vote per share. Stockholders who hold shares of Class B common stock, including our executive officers, directors and other affiliates, together hold a substantial majority of the voting power of our outstanding capital stock as of January 31, 2015.2016. Because of the ten-to-one voting ratio between our Class B and Class A common stock, the holders of our Class B common stock collectively will continue to control a majority of the combined voting power of our common stock and therefore be able to control all matters submitted to our stockholders for approval until the conversion of all shares of all Class A and Class B shares to a single class of common stock on the date that is the first to occur of (i) October 11, 2032, (ii) such time as the shares of Class B common stock represent less than 9% of the outstanding Class A and Class B common stock, (iii) nine months following the death of both Mr. Duffield and Mr. Bhusri, or (iv) the date on which the holders of a majority of the shares of Class B common stock elect to convert all shares of Class A common stock and Class B common stock into a single class of common stock. This concentrated control will limit or preclude the ability of non-affiliates to influence corporate matters for the foreseeable future.

Additionally, the stock markets have at times experienced extreme price and volume fluctuations that have affected and may in the future affect the market prices of equity securities of many companies. These fluctuations have, in some cases, been unrelated or disproportionate to the operating performance of these companies. Further, the trading prices of publicly traded shares of companies in our industry have been particularly volatile and may be very volatile in the future.

In June 2013, we completed an offering of $350.0$350 million of 0.75% convertible senior notes due July 15, 2018 (2018 Notes), and we concurrently issued an additional $250.0$250 million of 1.50% convertible senior notes due July 15, 2020 (2020 Notes).

As a result of these convertible notes offerings, we incurred $350.0$350 million principal amount of indebtedness, which we may be required to pay at maturity in 2018, and $250.0$250 million principal amount of indebtedness, which we may be required to pay at maturity in 2020, or upon the occurrence of a fundamental change (as defined in the applicable indenture). There can be no assurance that we will be able to repay this indebtedness when due, or that we will be able to refinance this indebtedness on acceptable terms or at all. In addition, this indebtedness could, among other things:

In connection with our offering of the 2018 Notes, we sold warrants to acquire up to approximately 4.2 million shares of our Class A common stock at an initial strike price of $107.96, which become exercisable beginning on October 15, 2018. In connection with our offering of the 2020 Notes, we sold warrants to acquire up to approximately 3.1 million shares of our Class A common stock at an initial strike price of $107.96, which become exercisable beginning on October 15, 2020. The warrants may be settled in shares or in cash. The exercise of the warrants could have a dilutive effect if the market price per share of our Class A common stock exceeds the strike price of the warrants. The counterparties to the warrant transactions and note hedge transactions relating to the 2018 Notes and the 2020 Notes are likely to enter into or unwind various derivative instruments with respect to our Class A common stock or purchase or sell shares of our Class A common stock or other securities linked to or referencing our Class A common stock in secondary market transactions prior to the respective maturity of the 2018 Notes and the 2020 Notes. These activities could adversely affect the trading price of our Class A common stock.

Our status as a Delaware corporation and the anti-takeover provisions of the Delaware General Corporation Law may discourage, delay, or prevent a change in control by prohibiting us from engaging in a business combination with an interested stockholder for a period of three years after the person becomes an interested stockholder, even if a change of control would be beneficial to our existing stockholders. In addition, our restated certificate of incorporation and restated bylaws contain provisions that may make the acquisition of our company more difficult, including the following:

These anti-takeover defenses could discourage, delay or prevent a transaction involving a change in control of our company. These provisions could also discourage proxy contests and make it more difficult for stockholders to elect directors of their choosing and to cause us to take other corporate actions they desire, any of which, under certain circumstances, could depress the market price of our securities.

We have broad discretion in the applicationuse of the net proceeds that we received from our initial public offering, our convertible senior notes offeringscash balances and our follow-on offering, including working capital, possible acquisitions and other general corporate purposes, and we may spend or invest these proceeds in a way with which our investors disagree.not use them effectively. The failure by our management to apply these funds effectively could adversely affect our business and financial condition. Pending their use, we may invest the net proceeds from these offerings in a manner that does not produce income or that loses value. Our investments may not yield a favorable return to our investors and may negatively impact the price of our securities.

The trading market for our securities will depend in part on the research and reports that securities or industry analysts publish about us or our business. If one or more of the analysts who cover us downgrade our Class A common stock or publish inaccurate or unfavorable research about our business, the price of our securities would likely decline. If one or more of these analysts cease coverage of us or fail to publish reports on us regularly, demand for our securities could decrease, which might cause the price and trading volume of our securities to decline.

We have never declared nor paid cash dividends on our capital stock. We currently intend to retain any future earnings to finance the operation and expansion of our business, and we do not expect to declare or pay any dividends in the foreseeable future. Consequently, stockholders must rely on sales of their common stock after price appreciation as the only way to realize any future gains on their investment.

Our corporate headquarters, which includes operations and product development facilities, is located in Pleasanton, California and consists of approximately 322,088538,172 square feet of space under multiple leases.

We also lease offices in various North American, European and Asian locations. We expect to expand our facilities capacity including at our corporate headquarters and in certain field locations during fiscal 2016. 2017.

An affiliate of our Chairman, Mr. Duffield, acquired commercial real estate in close proximity to our corporate headquarters in 2013. At the time of this acquisition, we had existing leases in the buildings acquired by an affiliate of Mr. Duffield. During the year ended January 31, 2015,2016, we leased approximately 110,000120,077 of additional square footage from the same affiliate of Mr. Duffield. We expect to lease additional space at that site in the coming year and beyond. We have and will continue to seek independent evaluations of current market rates at the time we sign new leases with the goal of leasing at a rate comparable to the current market price.

In January 2014, we acquired a 95 year lease for a 6.9 acre parcel of land adjacent to our existing Pleasanton, California leased facilities. The lease affords us the opportunity to develop office space for employees in Pleasanton, California. We paid $10 million to acquire the lease and $2 million in prepaid rent through December 31, 2020. IfWe expect to start construction does not commence by June 30, 2015, we will be requiredof our new development center, consisting of approximately 410,000 square feet of office space, on this property during the first half of fiscal 2017.

We believe that our existing facilities are adequate to make additional payments to the lessor, ranging from $0.2 million to $1 million based on the length of the delay. We believemeet current requirements, and that we will be able to obtain additional space at other locations at commercially reasonable terms to support our continuing expansion.

From time to time, we are involved in various legal proceedings arising from the normal course of business activities. We are not presently a party to any litigation the outcome of which we believe, if determined adversely to us, would individually or taken together have a material adverse effect on our business, operating results, cash flows or financial condition. Defending such

Our Class A common stock has beenis listed on the New York Stock Exchange under the symbol “WDAY” since October 12, 2012, the date of our initial public offering.“WDAY.”

The following table sets forth for the indicated periods the high and low intra-day sales prices of our Class A common stock as reported by the New York Stock Exchange.

Our Class B common stock is not listed or traded on any stock exchange.

We have never declared or paid cash dividends on our capital stock. We currently intend to retain any future earnings for use in the operation of our business and do not intend to declare or pay any cash dividends in the foreseeable future. Any further determination to pay dividends on our capital stock will be at the discretion of our board of directors, subject to applicable laws, and will depend on our financial condition, results of operations, capital requirements, general business conditions and other factors that our board of directors considers relevant.

As of January 31, 2015,2016, there were 4437 stockholders of record of our Class A common stock, including The Depository Trust Company, which holds shares of our common stock on behalf of an indeterminate number of beneficial owners, as well as 240210 stockholders of record of our Class B common stock.

The information concerning our equity compensation plans is incorporated by reference herein to the section of the Proxy Statement entitled “Equity Compensation Plan Information.”

The following shall not be deemed “filed” for purposes of Section 18 of the Exchange Act, or incorporated by reference into any of our other filings under the Exchange Act or the Securities Act of 1933, as amended, except to the extent we specifically incorporate it by reference into such filing.

This chart compares the cumulative total return on our common stock with that of the S&P 500 Index and the S&P 1500 Application Software Index. The chart assumes $100 was invested at the close of market on October 12, 2012, in the Class A

Workday provides financial management, human capital management, and analytics applications designed for the world's largest companies, educational institutions, and government agencies. We offer innovative and adaptable technology focused on the consumer Internet experience and cloud delivery model. Our applications are designed for global enterprises to manage complex and dynamic operating environments. We provide our customers highly adaptable, accessible and reliable applications to manage critical business functions that enable them to optimize their financial and human capital resources.

We were founded in 2005 to deliver cloud applications to global enterprises. Our applications are designed around the way people work today – in an environment that is global, collaborative, fast-paced and mobile. Our cycle of frequent updates has facilitated rapid innovation and the introduction of new applications throughout our history. We began offering our Human Capital Management (HCM) application in 2006.2006, and our Financial Management application in 2007. Since then we have continued to invest in innovation and have consistently introduced new services to our customers, including our Financial Management application in 2007, our Procurement and Employee Expense Management applications in 2008, our Payroll and mobile applications in 2009, our Talent Management application in 2010, our native iPad application and Workday integration platform in 2011, our Time Tracking and Grants Management applications in 2012, Big Data Analytics in 2013, Recruiting in 2014 and Insight Applications in 2015.customers.

We offer Workday applications to our customers on an enterprise-wide subscription basis, typically with three-year terms and with subscription fees largely based on the size of the customer’s workforce. We generally recognize revenues from subscription fees ratably over the term of the contract. We currently derive a substantial majority of our subscription services revenues from subscriptions to our HCM application. We market our applications primarily through our direct sales force.

We have achieved significant growth in a relatively short period of time. Our diverse customer base includes large, global companies and our direct sales force generally targets organizations with more than 1,000 workers. A substantial majorityamount of our growth comes from new customers. Our current financial focus is on growing our revenues and expanding our customer base. While we are incurring losses today, we strive to invest in a disciplined manner across all of our functional areas to sustain continued near-term revenue growth and support our long-term initiatives. Our operating expenses have increased significantly in absolute dollars in recent periods, primarily due to ourthe significant growth in employees.of our employee population. We had approximately 3,7505,200 and approximately 2,6003,750 employees as of January 31, 20152016 and 2014,2015, respectively.

We intend to continue investing for long-term growth. We have invested, and expect to continue to invest, heavily in our application development efforts to deliver additional compelling applications and to address customers’ evolving needs. In addition, we plan to continue to expand our ability to sell our applications globally, particularly in Europe and Asia, through investments in product development and customer support to address the business needs of local markets, increasing our sales and marketing organizations, building and leasing additional office space, and expanding our ecosystem of services partners to sell our applications globally.support local deployments. We expect to make further significant investments in our data center infrastructure in fiscal 2016 as we plan for future growth. We are also investing in personnel to service our growing customer base. These investments will increase our costs on an absolute basis in the near-term. Many of these investments will occur in advance of experiencing any direct benefit from them and will make it difficult to determine if we are allocating our resources efficiently. We expect our product development, sales and marketing, and general and administrative expenses as a percentage of total revenues to decrease over time as we grow our revenues, and we anticipate that we will gain economies of scale by increasing our customer base without direct incremental development costs and by utilizing more of the capacity of our data centers.

Since inception, we have invested heavily in our professional services organization to help ensure that customers successfully deploy and adopt our applications. Additionally, we continue to expand our professional services partner ecosystem to further support our customers. We believe our investment in professional services, as well as partners building consulting practices around Workday, will drive additional customer subscriptions and continued growth in revenues. In addition, over timeDue to our expanding partner ecosystem, we will not be ramping our professional services organization at the same growth rates as we have in the past, and we expect professional services revenues and the cost of professional services as a percentage of total revenues will continue to decline as we increasingly rely on our partners to deploy Workday applications and as the number of our existing customers continues to grow.over time.

We primarily derive our revenues from subscription services fees and professional services fees. Subscription services revenues primarily consist of fees that give our customers access to our cloud applications, which include routine customer support at no additional cost. Professional services fees include deployment services, optimization services, and training.

Subscription services revenues accounted for over 78%80% of our total revenues during fiscal 20152016 and represented over 96%97% of our total unearned revenue as of January 31, 2015.2016. Subscription services revenues are driven primarily by the number of customers, the number of workers at each customer, the number of applications subscribed to by each customer, and the price of our applications.

The mix of the applications to which a customer subscribes can affect our financial performance due to price differentials in our applications. Compared to our other offerings, our HCM application has been available for a longer period of time, is more established in the marketplace and has benefited from continued enhancements of the functionality over a longer period of time, all of which help us to improve our pricing for that application. However, new products or services offerings by competitors in the future could impact the mix and pricing of our offerings.

Subscription services fees are generally recognized ratably as revenues over the contract term beginning on the date the application is made available to the customer, which is generally within one week of contract signing. Our subscription contracts typically have a term of three years and are non-cancelable. We generally invoice our customers in advance, in annual installments. Amounts that have been invoiced are initially recorded as unearned revenue. Amounts that have not yet been invoiced represent backlog and are not reflected in our consolidated financial statements.

The majority of our consulting engagements are billed on a time and materials basis, and revenues are typically recognized as the services are performed. We offer a number of training options intended to support our customers in configuring, using and administering our services. In some cases, we supplement our consulting teams by subcontracting resources from our service partners and deploying them on customer engagements. As Workday’s professional services organization and the Workday-related consulting practices of our partner firms continue to develop, we expect the partners to increasingly contract directly with our subscription customers. As a result of this trend, and the increase of our subscription services revenues, we expect professional services revenues as a percentage of total revenues to decline over time.

We use the non-GAAP financial measure of core operating expenses to understand and compare operating results across accounting periods, for internal budgeting and forecasting purposes, for short- and long-term operating plans, and to evaluate our financial performance and the ability of operations to generate cash. We believe that core operating expenses reflects our ongoing business in a manner that allows for meaningful period-to-period comparisons and analysis of trends in our business, as it excludes expenses that are not reflective of ongoing operating results. We also believe that core operating expenses provides useful information to investors and others in understanding and evaluating our operating results and future prospects in the same manner as management and in comparing financial results across accounting periods and to those of peer companies.

The following discussion of our core operating expenses and the components comprising our core operating expenses highlights the factors that we focus upon in evaluating our operating margin and operating expenses. The increases or decreases in operating expenses discussed in this section do not include changes relating to share-based compensation expenses, and certain other expenses, which consist of employer payroll tax-related items on employee stock transactions and amortization of acquisition-related intangible assets and an equity grant to the Workday Foundation.assets.

Core operating marginOperating Margin

Core operating margins, calculated using GAAP revenues and core operating expenses, improved from (19)(6.7)% for fiscal 2015 to (0.2)% for fiscal 2016 and from (18.6)% for fiscal 2014 to (7)(6.7)% for fiscal 2015 and from (33)% for fiscal 2013 to (19)% for fiscal 2014.2015. The improvement in our core operating margin was primarily due to higher subscription services revenues in both fiscal 20152016 and 20142015 compared to prior fiscal years. The improvement in fiscal 20152016 was also due to higher professional services revenues driven by improved utilization rates and increased demand for services, and improvements toin operating leverage.

In evaluating our results, we generally focus on core operating expenses. We believe that our core operating expenses reflect our ongoing business in a manner that allows meaningful period-to-period comparisons. Our core operating expenses are reconciled to the most comparable U.S. generally accepted accounting principles (GAAP) measure, “total operating expenses,” in the table above.

Core operating expenses increased by $324 million, or 39% for fiscal 2016 compared to fiscal 2015, and by $285 million, or 51% for fiscal 2015 compared to fiscal 2014, and by $191 million, or 52% for fiscal 2014 compared to fiscal 2013.2014. As quantified below, these increases for both periods were primarily due to higher employee-related costs driven by higher headcount.

Costs of Subscription Services

We expect that core operating expenses in costs of subscription services will continue to increase in absolute dollars as we improve and expand our data center capacity and operations.

Costs of Professional Services

Product Development

Sales and Marketing

General and Administrative

Share-based compensation expenses were $250 million, $156 million $62 million and $15$62 million in fiscal 2016, 2015 and 2014, respectively. The increase in share-based compensation expenses for fiscal 2016 compared to fiscal 2015 was primarily due to grants of restricted stock units and 2013, respectively.performance-based restricted stock units to existing and new employees. The increase in share-based compensation expenses for fiscal 2015 compared to fiscal 2014 was primarily due to an increase in the number of employees, as well as a change in the timing of the cycle in which we grant additional equity awards to existing employees which resulted in grants that were made earlier in the fiscal year in fiscal 2015 relative to fiscal 2014. The increase in share-based compensation expenses for fiscal 2014 compared to fiscal 2013 was primarily due to an increase in the number of employees during fiscal 2014. During fiscal 2016, 2015 2014 and 2013,2014, the realized excess tax benefits related to share-based compensation were immaterial. The next grant to existing employees is planned for the first quarter of fiscal 2016.2017.

Other operating expenses which consist ofinclude employer payroll tax-related items on employee stock transactions of $9 million, $5 million and $4 million for fiscal 2016, 2015 and 2014, respectively. In addition, other operating expenses include amortization of acquisition-related intangible assets of $3 million and $1 million for fiscal 2016 and 2015, and a one-time charge related to our contributionrespectively. There was no amortization of 500,000 shares of Class A common stock to the Workday Foundationacquisition-related intangible assets in fiscal 2013, were $6 million, $4 million and $11 million, respectively. Employer payroll tax-related items on employee stock transactions substantially increased beginning in April 2013 after the expiration of the lock-up period for our initial public offering. Before fiscal 2014, the employer payroll tax-related charges on employee stock transactions were not included in other operating expenses as they were not material.2014.

Other expense, net, was $24 million, $30 million, $18 million and $1$18 million for fiscal 2016, 2015 and 2014, and 2013, respectively. The decrease in other expense, net for fiscal 2016 compared to fiscal 2015 was primarily due to the gain on sale of a cost method investment in fiscal 2016 of $3 million. The increase in other expense, net for fiscal 2015 and 2014 compared to prior periodsfiscal 2014 was primarily due to the interest expense related to our June 2013 issuance of 0.75% convertible senior notes due October 15, 2018 (2018 Notes) and 1.50% convertible senior notes due October 15, 2020 (2020 Notes, and together with the 2018 Notes, the Notes), as we incurred a full period of interest expense in fiscal 2015.We issued the Notes in June 2013, and therefore incurred interest on the Notes for only a portion of fiscal 2014. We did not incur interest expense for the Notes in fiscal 2013 as they had not yet been issued.

The contractual cash interest expense

As of January 31, 2015,2016, our principal sources of liquidity were cash, cash equivalents and marketable securities totaling $1.9$2.0 billion, which were held for working capital purposes. Our cash equivalents and marketable securities are composed primarily of U.S. agency obligations, U.S. treasury securities, U.S. corporate securities, commercial paper, and money market funds.

We have financed our operations primarily through sales of equity securities, customer payments, and issuance of debt. Our future capital requirements will depend on many factors, including our customer growth rate, subscription renewal activity, the timing of construction of our new development center in Pleasanton, California, the timing and extent of development efforts, the expansion of sales and marketing activities, the introduction of new and enhanced services offerings, and the continuing market acceptance of our services.services, and acquisition activities. We may in the future enter into arrangements to acquire or invest in complementary businesses, services and technologies andor intellectual property rights.rights in the future. We also may choose to seek additional equity or debt financing.

Our cash flows for fiscal 2016, 2015 2014 and 20132014 were as follows:

In evaluating our performance internally, we focus on long-term, sustainable growth in free cash flows. We define free cash flows, a non-GAAP financial measure, as net cash provided by (used in) operating activities minus purchases of property and equipment, property and equipment acquired under capital leases and purchases of other (non-acquisition-related) intangible assets. See “Non-GAAP Financial Measures” below for further information.

Our free cash flows for fiscal 2016, 2015 2014 and 20132014 were as follows:

We use cash provided by operating activities as a key financial metric. Cash provided by operating activities was $259 million, $102 million and $46 million and $11 million, respectively, for fiscal 2016, 2015 and 2014, and 2013.respectively. The increaseimprovements in cash flows provided by operating activities in both fiscal 2016 and 2015 compared to prior fiscal years resulted primarily from increased cash collections driven by growth in our customer demand for our services. This increase in collections in both fiscal 2015 and 2014 wassales contracts, partially offset by increases in our headcount related and other operational expenses.

Cash used in investing activities for fiscal 2016, 2015 and 2014 and 2013 was $300 million, $404 million $683 million and $670$683 million, respectively, which was primarily the result of the timing of purchases and maturities of marketable securities and capital expenditures of $134 million, $104 million and $61 million, respectively. During fiscal 2016, we paid $31 million to acquire new businesses and $16$17 million respectively. Followingto purchase cost method investments, and we received proceeds of $103 million from the initial public offeringsale of our Class A common stock in October 2012,available-for-sale securities and $4 million from the issuancesale of our Notes in June 2013 and our follow-on offering of Class A common stock in January 2014, we purchased a significant amount of marketable securities. In addition, duringcost method investment. During fiscal 2015, we paid $26 million to acquire a new business and $10 million to purchase 1.4 million shares of series D preferred stock in a private company,cost method investment, and received proceeds of $53 million from the sale of available-for-sale securities. During fiscal 2014, we paid $10 million to purchase a leasehold interest in land in Pleasanton adjacent to our existing office space and $5 million to acquire patents.

We expect capital expenditures, excluding our development center, will be approximately $150$175 million for fiscal 2016.2017. We expect that these capital outlays will largely be used to expand the infrastructure of our data centers and to build out additional office space to support our growth. We are actively evaluating construction alternativesexpect capital expenditures for the leasehold land in Pleasanton and have not yet factored related development costs, if any, into our expected capital expenditures.center will be approximately $125 million for fiscal 2017.

For fiscal 2015, cash provided by financing activities was $19 million, primarily as a result of $36 million of proceeds from the issuance of common stock from employee equity plans, partially offset by $10 million in principal payments on our capital lease obligations and $8 million of Class A common share repurchases for tax withholdings on vesting of restricted stock.

For fiscal 2014, cash provided by financing activities was $1 billion, primarily as a result of $584 million in net proceeds from issuance of the Notes, $592 million in net proceeds from our follow-on offering of Class A common stock, $93 million in proceeds from the issuance of warrants related to the Notes and $24 million in proceeds from the issuance of common stock from employee equity plans. These proceeds were partially offset by $144 million to purchase convertible senior notes hedges and $12 million in principal payments on our capital lease obligations. We purchased the convertible senior notes hedges to offset potential economic dilution to our Class A common stock upon any conversion of the Notes.

In addition to cash provided by (used in) operating activities, we usemanagement uses free cash flows as a key financial metric. Free cash flows increased by $127 million to $125 million for fiscal 2016, compared to $(2) million for fiscal 2015 and increased by $28 million to $(2) million for fiscal 2015, compared to $(30) million for fiscal 2014 and decreased by $7 million to $(30) million for fiscal 2014, compared to $(23) million for fiscal 2013.2014. The improvement in free cash flows in fiscal 2016 and 2015 as compared to fiscal 2014 was primarily due to increased sales and related cash collections, partially offset by increased capital expenditures and higher operating expenses, driven primarily by increased headcount. The reduction in free cash flows in fiscal 2014 as compared to fiscal 2013 was primarily due to a significant increase in cash paid for property and equipment and payments made for a leasehold interest and patents, partially offset by increased sales and related cash collections.

Regulation S-K Item 10(e), “Use of non-GAAP financial measures in Commission filings,” defines and prescribes the conditions for use of non-GAAP financial information. Our measures of core operating expenses, core operating margin and free cash flows each meet the definition of a non-GAAP financial measure.

We define core operating expenses as our total operating expenses excluding the following components, which we believe are not reflective of our ongoing operational expenses. In each case, for the reasons set forth below, we believemanagement believes that excluding the component provides useful information to investors and others in understanding and evaluating our operating results and future prospects in the same manner as management, in comparing financial results across accounting periods and to those of peer companies and to better understand the long-term performance of our core business.

We define free cash flows as net cash provided by (used in) operating activities minus purchases of property and equipment, property and equipment acquired under capital leases and purchases of other (non-acquisition-related) intangible assets. We use free cash flows as a measure of financial progress in our business, as it balances operating results, cash management and capital efficiency. When calculating free cash flows, we subtract the gross value of all equipment acquired in the period, even whenpaid for or acquired under capital leases, so that we can evaluate our progress on free cash flows independent of our capital financing decisions. We believe information regarding free cash flows provides investors and others with an important perspective on the cash available to make strategic acquisitions and investments, to fund ongoing operations and to fund other capital expenditures.

A limitation of our non-GAAP financial measures of core operating expenses, core operating margin and free cash flows is that they do not have uniform definitions. Our definitions will likely differ from the definitions used by other companies, including peer companies, and therefore comparability may be limited. In addition, other peer companies may not publish these or similar metrics. Thus, our non-GAAP measures of core operating expenses, core operating margin and free cash flows should be considered in addition to, not as a substitute for, or in isolation from, measures prepared in accordance with GAAP. Additionally, in the case of share-based compensation, if we did not pay out a portion of compensation in the form of share-based compensation and related employer payroll tax-related items, the cash salary expense included in costs of revenues and operating expenses would be higher, which would affect our cash position. Further, the non-GAAP measure of core operating expenses has certain limitations because it does not reflect all items of income and expense that affect our operations and are reflected in the GAAP measure of total operating expenses.

We compensate for these limitations by reconciling core operating expenses to the most comparable GAAP financial measure and reviewing these measures in conjunction with GAAP financial information. We encourage investors and others to review our financial information in its entirety, not to rely on any single financial measure and to view our non-GAAP financial measures in conjunction with the most comparable GAAP financial measures.

See “Results of Operations—Core Operating Expenses” for a reconciliation of the non-GAAP financial measure of core operating expenses to the most comparable GAAP measure, “total operating expenses,” for fiscal 2016, 2015 2014 and 2013.2014.

See “Liquidity and Capital Resources” for a reconciliation of free cash flows to the most comparable GAAP measure, “net cash provided by (used in) operating activities,” for fiscal 2016, 2015 2014 and 2013.2014.

We generally sign multiple-year subscription contracts for our applications. The timing of our invoices to theeach customer is a negotiated term and varies among our subscription contracts. For multiple-year agreements, it is common to invoice an initial amount at contract signing followed by subsequent annual invoices. At any point in the contract term, there can be amounts that we have not yet been contractually able to invoice. Until such time as these amounts are invoiced, they are not recorded in revenues, unearned revenue or elsewhere in our consolidated financial statements. To the extent future invoicing is determined to be certain, we consider those future subscription invoices to be non-cancelable backlog. Future invoicing is determined to be certain when we have a fully executed non-cancelable contract and invoicing is not dependent on a future event such as customer funding or the delivery of a product.specific product or feature. The amount of non-cancelable subscription contract backlog was $1.6 billion and $965 million as of January 31, 2015.2016 and 2015, respectively.

We expect that the amount of backlog relative to the total value of our contracts will change from year to year fordue to several reasons,factors, including the amount of cash collectedinvoiced early in the contract term, the specific timing and duration of large customer subscription agreements, varying invoicing cycles of subscription agreements, the specific timing of customer renewals, changes in customer financial circumstances and foreign currency fluctuations. Backlog may also vary based on changes in the average non-cancelable term of our subscription agreements. Accordingly, we believe that fluctuations in backlog are not always a reliable indicator of future revenues and we do not utilize backlog as a key management metric internally.

Our principalcontractual commitments primarily consist of obligations under leases for office space and co-location facilities for data center capacity and our development and test data center, and computer equipment.capacity. For fiscal 2016,2017, we anticipate leasing additional office space near our headquarters and in various other locations around the world to support our growth. In addition, our existing lease agreements often provide us with an option to renew. We expect our future operating lease obligations will increase as we expand our operations.

In January 2014, Workday acquiredwe entered into a 95-year lease for a 6.9 acre parcel of land adjacent to our existingin Pleasanton, California, leased facilities. The lease affords us the opportunity to develop office space for employees in Pleasanton, California. Weunder which we paid $10 million to acquire the lease and $2 million in prepaidfor base rent from commencement through December 31, 2020. IfAnnual rent payments of $0.2 million plus increases based on increases in the consumer price index begin on January 1, 2021 and continue through the end of the lease. We expect to start construction doesof our new development center, consisting of approximately 410,000 square feet of office space, on this property during the first half of fiscal 2017. We have entered into an agreement with a contractor for the construction of the new development center, however it is not commence by June 30, 2015,included in the table above because it allows for termination without significant penalty. As noted in the Liquidity and Capital Resources section above, we expect capital expenditures related to the development center will be approximately $125 million for fiscal 2017.

We are not required to make additionalprincipal payments under the Notes prior to maturity. If the Notes are not converted to Class A common stock prior to their maturity dates, we are required to repay $350 million in principal on July 15, 2018 and $250 million in principal on July 15, 2020. We are also required to make interest payments on a semi-annual basis at the interest rates described in Note 10 of the notes to the lessor, ranging from $0.2 million to $1 million based on the length of the delay.consolidated financial statements.

Purchase orders are not included in the table above. Our purchase orders represent authorizations to purchase rather than binding agreements. The contractual commitment amounts in the table above are associated with agreements that are enforceable and legally binding and that specify all significant terms, including fixed or minimum services to be used, fixed, minimum or variable price provisions, and the approximate timing of the transaction. Obligations under contracts that we can cancel without a significant penalty are not included in the table above. In addition, future obligations relating to the lease described above for construction costs and required extension payments, if any, are not included in the above table because the costs and payments are dependent on the timing and scope of construction, which is not yet known.

Through January 31, 2015,2016, we did not have any relationships with unconsolidated organizations or financial partnerships, such as structured finance or special purpose entities that would have been established for the purpose of facilitating off-balance sheet arrangements or other contractually narrow or limited purposes.

Our consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States. The preparation of these consolidated financial statements requires us to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues, costs and expenses, and related disclosures. On an ongoing basis, we evaluate our estimates and assumptions. Our actual results may differ from these estimates under different assumptions or conditions.

We believe that of our significant accounting policies, which are described in Note 2 to our consolidated financial statements, the following accounting policies involve a greater degree of judgment and complexity. Accordingly, these are the policies we believe are the most critical to aid in fully understanding and evaluating our consolidated financial condition and results of operations.

We derive our revenues primarily from subscription services fees and from professional services fees, including training. We sell subscriptions to our cloud applications through contracts that are generally three years in length. Our arrangements do not contain general rights of return. Our subscription contracts do not provide customers with the right to take possession of the software supporting the applications and, as a result, are accounted for as service contracts.

We commence revenue recognition for our cloud applications and professional services when all of the following criteria are met:

Subscription services revenues are generally recognized ratably over the contractual term of the arrangement beginning on the date that our service is made available to the customer, assuming all other revenue recognition criteria have been met.

Professional services revenues are generally recognized as the services are rendered for time and material contracts, or on a proportional performance basis for fixed price contracts. The majority of our professional services contracts are on a time and materials basis. Training revenues are recognized as the services are rendered.

For arrangements with multiple deliverables, we evaluate whether the individual deliverables qualify as separate units of accounting. In order to treat deliverables in a multiple deliverable arrangement as separate units of accounting, the deliverables must have standalone value upon delivery. If the deliverables have standalone value upon delivery, we account for each deliverable

Subscription contracts have standalone value as we sell the subscriptions separately. In determining whetherAll of our professional services have standalone value and can be accounted for separately from subscription services, we considergiven the availability of the professional services from other vendors, the nature of our professional services and whether we sellongoing sales of our applications to new customers without professional services. All of our professional services have standalone value as of February 1, 2012.

When multiple deliverables included in an arrangement are separable into different units of accounting, the arrangement consideration is allocated to the identified separate units of accounting based on their relative selling price. Multiple deliverable arrangement accounting guidance provides a hierarchy to use when determining the relative selling price for each unit of accounting. Vendor-specific objective evidence (VSOE) of selling price, based on the price at which the item is regularly sold by the vendor on a standalone basis, should be used if it exists. If VSOE of selling price is not available, third-party evidence (TPE) of selling price is used to establish the selling price if it exists. If neither VSOE andnor TPE do not currently exist for any of our deliverables. Accordingly, fora deliverable, arrangements with multiple deliverables that can be separated into different units of accounting, we allocate the arrangement fee to the separatediscrete units of accounting based on our best estimate of selling price. The amount of arrangement fee allocated is limited by contingent revenues, if any.

We determine ourthe best estimate of selling price for our deliverables based on our overall pricing objectives, taking into consideration market conditions and entity-specific factors. We evaluate our best estimate of selling price by reviewing historical data related to sales of our deliverables, including comparing the percentages of our contract prices to our list prices. We also consider several other data points in our evaluation, including the size of our arrangements, the cloud applications sold, customer demographics and the numbers and types of users within our arrangements.

Sales commissions earned by our sales force are considered to be direct sales commissions when they can be associated specifically with a non-cancelable subscription contract. Direct sales commissions are deferred when earned and amortized over the same period that revenues are recognized for the related non-cancelable cloud application servicessubscription contract. The commission payments are paid in full after the customer has paid for its first year of service. During fiscal 2015,2016, we deferred $23$32 million of commissions and we amortized $16$20 million to sales and marketing expenses in the accompanying consolidated statements of operations. During fiscal 2014,2015, we deferred $19$23 million of commission expenditures and we amortized $10$16 million to sales and marketing expenses in the accompanying consolidated statements of operations. Deferred commissions on our consolidated balance sheets totaled $37$51 million and $29$37 million at January 31, 20152016 and 2014,2015, respectively.

In accounting for the issuance of the Notes, we separated the Notes into liability and equity components. The carrying amount of the liability component was calculated by measuring the fair value of a similar liability that does not have an associated convertible feature. The carrying amount of the equity component representing the conversion option was determined by deducting the fair value of the liability component from the par value of the Notes as a whole. This difference represents a debt discount that is amortized to interest expense over the terms of the Notes. The equity component is not remeasured as long as it continues to meet the conditions for equity classification. In accounting for the issuance costs related to the Notes, we allocated the total amount incurred to the liability and equity components. Issuance costs attributable to the liability components are being amortized to expense over the respective terms of the Notes, and issuance costs attributable to the equity components were netted with the respective equity component in additional paid-in capital.

We had cash, cash equivalents and marketable securities totaling $1.9$2.0 billion as of January 31, 2015.2016. Cash equivalents and marketable securities were invested primarily in U.S. agency obligations, U.S. treasury securities, U.S. corporate securities, commercial paper, and money market funds. The cash, cash equivalents and marketable securities are held for working capital purposes. Our investments are made for capital preservation purposes. We do not enter into investments for trading or speculative purposes.

Our cash equivalents and our portfolio of marketable securities are subject to market risk due to changes in interest rates. Fixed rate securities may have their market value adversely affected due to a rise in interest rates, while floating rate securities may produce less income than expected if interest rates fall. Due in part to these factors, our future investment income may fluctuate due to changes in interest rates or we may suffer losses in principal if we are forced to sell securities that decline in market value due to changes in interest rates. However, because we classify our marketable securities as “available for sale,” no gains or losses are recognized due to changes in interest rates unless such securities are sold prior to maturity or declines in fair value are determined to be other-than-temporary.

An immediate increase of 100-basis points in interest rates would have resulted in a $2$8 million market value reduction in our investment portfolio as of January 31, 2015. All2016. Each of our investments earn less than 100-basis points and as a result, an immediate decrease of 100-basis points in interest rates would have increased the market value by $2$5 million as of January 31, 2015.2016. This estimate is based on a sensitivity model that measures market value changes when changes in interest rates occur. Fluctuations in the value of our investment securities caused by a change in interest rates (gains or losses on the carrying value) are recorded in Accumulated other comprehensive income (loss), and are realized only if we sell the underlying securities.

In June 2013, we hadissued $350 million of 2018 Notes and $250 million of 2020 Notes. Holders may convert the Notes prior to maturity upon the occurrence of certain circumstances. Upon conversion, holders of the Notes will receive cash, shares of Class A common stock or a combination of cash equivalents and marketable securities totaling $1.9 billion. The fixed-income portfolio was also subjectshares of Class A common stock, at our election.

Our Notes have fixed annual interest rates at 0.75% and 1.50% and, therefore, we do not have economic interest rate exposure on our Notes. However, the values of the Notes are exposed to interest rate risk; however,risk. Generally, the riskfair market value of our fixed interest rate Notes will increase as interest rates fall and decrease as interest rates rise. In addition, the fair values of the 2018 Notes and the 2020 Notes are affected by our stock price. The carrying values of our 2018 Notes and 2020 Notes were $307 million and $201 million, respectively, as of January 31, 2016. These represent the liability component of the principal balance of our Notes as of January 31, 2016. The total estimated fair values of the 2018 Notes and 2020 Notes at January 31, 2016 were $362 million and $264 million, respectively, and the fair value was not material.