10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

(Mark One)

ý	Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
	For the fiscal year ended December 31, 2018
or
o	Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
	For the transition period from  _______________ to _______________

Commission File No. 1-13998

Insperity, Inc.

(Exact name of registrant as specified in its charter)

Delaware	76-0479645
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
19001 Crescent Springs Drive
Kingwood, Texas	77339
(Address of principal executive offices)	(Zip Code)

(Registrant’s Telephone Number, Including Area Code):  (281) 358-8986

Securities Registered Pursuant to Section 12(b) of the Act:

Common Stock, Par value $0.01 per share	New York Stock Exchange
(Title of class)	(Name of Exchange on Which Registered)

Securities Registered Pursuant to Section 12(g) of the Act: NONE

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.

Yes ý No o

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes o No ý

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days. Yes ý No o

Indicate by check mark whether the registrant has submitted electronically every Interactive Data file required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).

Yes ý No o

Indicate by check mark if disclosure of delinquent filers pursuant to item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definition of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer ý	Accelerated filer o
Non-accelerated filer o	Smaller reporting company o
	Emerging growth company o

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Yes o No ý

As of February 4, 2019, 40,937,606 shares of the registrant’s common stock, par value $0.01 per share, were outstanding. As of the last business day of the registrant’s most recently completed second quarter, the aggregate market value of the common stock held by non-affiliates (based upon the June 30, 2018 closing price of the common stock as reported by the New York Stock Exchange) was approximately $3.6 billion.

DOCUMENTS INCORPORATED BY REFERENCE

Part III information is incorporated by reference from the proxy statement for the 2019 annual meeting of stockholders, which the registrant intends to file within 120 days of the end of the fiscal year.

TABLE OF CONTENTS

			Page
Part I
	Item 1.	Business	2
	Item 1A.	Risk Factors	20
	Item 1B.	Unresolved Staff Comments	26
	Item 2.	Properties	27
	Item 3.	Legal Proceedings	28
	Item S-K 401(b).	Executive Officers of the Registrant	29
Part II
	Item 5.	Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	30
	Item 6.	Selected Financial Data	32
	Item 7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	34
	Item 7A.	Quantitative and Qualitative Disclosures about Market Risk	55
	Item 8.	Financial Statements and Supplementary Data	55
	Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	56
	Item 9A.	Controls and Procedures	56
	Item 9B.	Other Information	56
Part III
	Item 10.	Directors, Executive Officers and Corporate Governance	57
	Item 11.	Executive Compensation	57
	Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	57
	Item 13.	Certain Relationships and Related Transactions, and Director Independence	57
	Item 14.	Principal Accounting Fees and Services	57
Part IV
	Item 15.	Exhibits, Financial Statement Schedules	58
	Item 16.	Form 10-K Summary	61

BUSINESS

PART I

Unless otherwise indicated, “Insperity,” “we,” “our” and “us” are used in this annual report to refer to Insperity, Inc. and its consolidated subsidiaries. This annual report contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. You can identify such forward-looking statements by the words “expects,” “intends,” “plans,” “projects,” “believes,” “estimates,” “likely,” “possibly,” “probably,” “goal,” “opportunity,” “objective,” “target,” “assume,” “outlook,” “guidance,” “predicts,” “appears,” “indicator” and similar expressions. In the normal course of business, in an effort to help keep our stockholders and the public informed about our operations, from time to time, we may issue such forward-looking statements, either orally or in writing. Generally, these statements relate to business plans or strategies, projected or anticipated benefits or other consequences of such plans or strategies, or projections involving anticipated revenues, earnings or other operating results. We base the forward-looking statements on our current expectations, estimates and projections. We caution you that these statements are not guarantees of future performance and involve risks, uncertainties and assumptions that we cannot predict. In addition, we have based many of these forward-looking statements on assumptions about future events that may prove to be inaccurate. Therefore, the actual results of the future events described in such forward-looking statements in this annual report, or elsewhere, could differ materially from those stated in such forward-looking statements. Among the factors that could cause actual results to differ materially are the risks and uncertainties discussed in this annual report, including, without limitation, factors discussed in Item 1, “Business,” Item 1A, “Risk Factors,” and Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

Item 1.   Business.

General

We provide an array of human resources (“HR”) and business solutions designed to help improve business performance. Since our formation in 1986, we have evolved from being solely a professional employer organization (“PEO”), an industry we pioneered, to our current position as a comprehensive business performance solutions provider.

Our long-term strategy is to provide the best small and medium-sized businesses in the United States with our specialized human resources service offering and to leverage our buying power and expertise to provide additional valuable services to clients. Our most comprehensive HR services offerings are provided through our Workforce Optimization^® and Workforce Synchronization^TM solutions (together, our “PEO HR Outsourcing solutions”), which encompass a broad range of human resources functions, including payroll and employment administration, employee benefits, workers’ compensation, government compliance, performance management, and training and development services, along with our cloud-based human capital management platform, our Insperity Premier^TM solution. Our Workforce Optimization solution is our most comprehensive HR outsourcing solution and is our primary offering. Our Workforce Synchronization solution, which generally is offered only to our middle market client segment, is a lower cost offering with a typically longer commitment that includes the same compliance and administrative services as our Workforce Optimization solution and allows those clients to select, for an additional fee, from the strategic HR products and organizational development services that are included with our Workforce Optimization solution.

In addition to our PEO HR Outsourcing solutions, we offer Workforce Acceleration, a comprehensive human capital management and payroll service solution. We also offer a number of other business performance solutions, including Time and Attendance, Performance Management, Organizational Planning, Recruiting Services, Employment Screening, Expense Management Services, Retirement Services and Insurance Services, many of which are offered as a cloud-based software solution. These other products and services are offered separately or along with our PEO HR Outsourcing solutions or our Workforce Acceleration solution.

Our PEO HR Outsourcing solutions are designed to improve the productivity and profitability of small and medium-sized businesses. These solutions relieve business owners and key executives of many employer-related administrative and regulatory burdens, which enable them to focus on the core competencies of their businesses. Our PEO HR Outsourcing solutions also promote employee performance through human resources management techniques designed to improve employee satisfaction. We enter into a Client Service Agreement (“CSA”) with each of our PEO HR Outsourcing solutions clients under which we and our client act as co-employers of the employees who work at the client’s worksite (“WSEE”). Under the CSA, we assume responsibility for personnel administration and assist our clients in complying with employment-related governmental regulations, while the client retains the employees’ services in its business and remains the employer for various other purposes. We charge a comprehensive service fee (“comprehensive service fee” or “gross

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billing”), which is invoiced concurrently with the processing of payroll for the WSEEs of the client. The comprehensive service fee consists of the payroll of our WSEEs plus an additional amount reflected as a percentage of the payroll cost of the WSEEs.

We accomplish the objectives of our PEO HR Outsourcing solutions through a “high-touch/high-tech” approach to service delivery. In advisory areas, such as recruiting, employee performance management and employee training, we employ a high-touch approach designed to ensure that our clients receive the personal attention and expertise needed to create a customized human resources solution. We utilize a variety of information technology capabilities to deliver our PEO HR Outsourcing solutions, including Insperity Premier, our cloud-based human capital management platform, which provides an online platform through which we, along with our clients and WSEEs, manage worksite employee information, payroll, benefits and retirement solutions, creating efficiencies for all parties.

As of December 31, 2018, we had 73 offices, including 67 sales offices in 33 markets. In addition, we had four regional service centers along with human resources and client service personnel located in a majority of our 33 sales markets, which serviced an average of 221,809 WSEEs per month in the fourth quarter of 2018. Our service centers coordinate PEO HR Outsourcing solutions for clients on a regional basis and localized face-to-face human resources services.

We were organized as a corporation in 1986. Our principal executive offices are located at 19001 Crescent Springs Drive, Kingwood, Texas 77339. Our telephone number at that address is (281) 358-8986, and our website address is www.insperity.com. Our stock is traded on the New York Stock Exchange under the symbol “NSP.” We file or furnish periodic reports with the Securities and Exchange Commission (“SEC”), including our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and if applicable, amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934. Through the investor relations section of our website, we make available electronic copies of the documents that we file or furnish to the SEC, the charters of the standing committees of our Board of Directors and other documents related to our corporate governance, including our Code of Conduct. Access to these electronic filings is available free of charge as soon as reasonably practicable after filing or furnishing them to the SEC. Printed copies of our committee charters and other governance documents and filings can be requested by writing to our corporate secretary at the address above.

PEO Industry

The PEO industry began to evolve in the early 1980s largely in response to the burdens placed on small and medium-sized employers by an increasingly complex legal and regulatory environment. While various service providers were available to assist these businesses with specific tasks, PEOs emerged as providers of a more comprehensive range of services relating to the employer/employee relationship. In a PEO arrangement, the PEO assumes certain aspects of the employer/employee relationship as defined in the contract between the PEO and its client. Because PEOs provide employer-related services to a large number of employees, they can achieve economies of scale that allow them to perform employment-related functions more efficiently, provide a greater variety of employee benefits, and devote more attention to human resources management than a client can individually.

We believe the key factors driving demand for PEO services include:

• the focus on growth and productivity of the small and medium-sized business community in the United States, utilizing outsourcing to concentrate on core competencies

• the need to provide competitive health care and related benefits to attract and retain employees

• the increasing costs associated with health and workers’ compensation insurance coverage, workplace safety programs, employee-related complaints and litigation

• complex regulation of employment issues and the related costs of compliance, including the allocation of time and effort to such functions by owners and key executives

• the significant costs, time and specialized knowledge required to purchase or develop the technology infrastructure to administer benefits, HR and payroll processing on an integrated basis

A significant factor in the development of the PEO industry has been increasing recognition and acceptance of PEOs and the co-employer relationship by federal and state governmental authorities. Insperity and other industry leaders, in concert with the National Association of Professional Employer Organizations (“NAPEO”), have worked with the relevant

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governmental entities for the establishment of a regulatory framework that protects clients and employees, discourages unscrupulous and financially unsound PEOs, and promotes further development of the industry. Currently, 42 states have enacted legislation either recognizing PEOs or requiring licensing, registration, or certification, and several others are considering such regulation. Such laws vary from state to state but generally provide for monitoring the fiscal responsibility of PEOs. State regulation assists in screening insufficiently capitalized PEO operations and helps to resolve interpretive issues concerning employer/employee status for specific purposes under applicable state law. We have actively supported such regulatory efforts and are currently recognized, licensed, registered, certified or pursuing registration in all of these states. The cost of compliance with these regulations is not material to our financial position or results of operations.

In 2014, the Small Business Efficiency Act (“SBEA”) was enacted. The SBEA created a federal regulatory framework for the payment of wages to WSEEs and the reporting and remittance of federal payroll taxes on those wages paid by PEOs certified under the statute (“CPEOs”). We actively supported the enactment of this law. The SBEA clarifies that a CPEO, rather than the client, is treated as the employer for purposes of reporting and remitting payroll taxes. It also clarifies that a CPEO is treated as a successor employer for purposes of the wage base of WSEEs on which federal payroll taxes are applied. In addition, the law clarifies that clients of a CPEO remain eligible for specified tax credits for which they would have been eligible absent the CPEO relationship. Following the establishment of the certification program by the Internal Revenue Service of the United States (“IRS”) and Treasury Department, our PEO subsidiary, Insperity PEO Services, L.P., received its designation as a CPEO from the IRS effective as of January 1, 2017.

Service Offerings

PEO HR Outsourcing Solutions

We serve small and medium-sized businesses by providing our PEO HR Outsourcing solutions, which encompass a broad range of services. Both of our PEO HR Outsourcing solutions offer the following:

• benefits and payroll administration

• health and workers’ compensation insurance programs

• personnel records management

• employer liability management

• assistance with government compliance

• general HR advice

• access to Insperity Premier for employees, managers and client owners

• 401(k) retirement plan sponsored by us

Our Workforce Optimization solution also provides additional services that our Workforce Synchronization clients can purchase for an additional fee, including the following:

• employee recruiting and support

• employee performance management

• training and development services

Our PEO HR Outsourcing solutions are designed to attract and retain high-quality employees, while relieving client owners and key executives of many employer-related administrative and regulatory burdens. Among the employment-related laws and regulations that may affect a client are the following:

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•	Internal Revenue Code (the “Code”)	•	The Family and Medical Leave Act (FMLA)
•	Federal Income Contribution Act (FICA)	•	Genetic Information Nondiscrimination Act of 2008
•	Federal Unemployment Tax Act (FUTA)	•	Drug-Free Workplace Act
•	Fair Labor Standards Act (FLSA)	•	Occupational Safety and Health Act (OSHA)
•	Employee Retirement Income Security Act, as amended (ERISA)	•	Worker Adjustment and Retraining Notification Act (WARN)
•	Consolidated Omnibus Budget Reconciliation Act of 1985 (COBRA)	•	Uniformed Services Employment and Reemployment Rights Act (USERRA)
•	Immigration Reform and Control Act (IRCA)	•	State unemployment and employment security laws
•	Title VII (Civil Rights Act of 1964)	•	State workers’ compensation laws
•	Health Insurance Portability and Accountability Act (HIPAA)	•	Health Care and Education Reconciliation Act of 2010 (the “Reconciliation Act”)
•	Age Discrimination in Employment Act (ADEA)	•	Patient Protection and Affordable Care Act (PPACA)
•	Americans with Disabilities Act (ADA)	•	State and local law equivalents of the foregoing

These laws and regulations are complex, and in some instances overlapping. We assist our PEO HR Outsourcing solutions clients in complying with these laws and regulations by providing services in the categories set forth below:

Administrative Functions. Administrative functions encompass a wide variety of processing and recordkeeping tasks, mostly related to payroll administration and regulatory compliance. Specific examples include:

• payroll processing

• payroll tax deposits

• quarterly payroll tax reporting

• employee file maintenance

• unemployment claims processing

• workers’ compensation claims reporting and monitoring

Benefit Plans Administration. We maintain several benefit plans for eligible WSEEs including the following:

• a group health plan

• a health savings account program

• a health care flexible spending account plan

• an educational assistance program

• an adoption assistance program

• group term life insurance

• group universal life insurance

• accidental death and dismemberment insurance

• short-term and long-term disability insurance

• a 401(k) retirement plan

• cafeteria plans for group health and health savings account contributions

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The group health plan includes medical, dental, vision and prescription drug coverage, as well as a work-life program. All benefit plans are provided to eligible employees based on the specific eligibility provisions of each plan. We are the policyholder responsible for the costs and premiums associated with any group insurance policies that provide benefits under these plans, and we act as plan sponsor and administrator of the plans. We negotiate the terms and costs of the plans, maintain the plans in accordance with applicable federal and state regulations and serve as liaison for the delivery of these benefits to WSEEs and corporate employees. COBRA coverage is extended to eligible terminated WSEEs and other eligible individuals in accordance with applicable law. We believe that the variety and comprehensive nature of our benefit plan offerings are generally not available to employees in our small and medium-sized business target market and are usually offered only by larger companies that can spread program costs over a much larger group of employees. As a result, we believe the availability of these benefit plans provides our clients with a competitive advantage that small and medium-sized businesses are typically unable to attain on their own.

Insperity Premier.Insperity Premier is our cloud-based human capital management platform for our PEO HR Outsourcing solutions and is available to our clients with almost no implementation effort or cost. It is designed to provide our service providers with insight into client and worksite employee HR information to better support their needs. Insperity Premier provides role-based access to a wide range of human capital management functions, along with personalized content to the managers, owners and WSEEs of our PEO HR Outsourcing solutions clients, including:

For managers and client owners:

• WebPayroll for the submission, approval and reporting of payroll data

• tools to manage the onboarding of new employees

• employee administration functions such as viewing or changing information about employees

• access to client-specific compliance-related information relevant to many HR areas, including the Affordable Care Act

• a reporting and analytics tool to create, view, save and export reports and data about employees

• ability to manage employee time and attendance information, absences and paid time off

• access to talent management tools in the areas of recruiting, performance management and learning management

• access to a library of online human resources forms

• access to a wide range of best-practices human resources management content

• mobile access to review and approve payroll transactions and employee time entry

For WSEEs:

• access to view, edit and change a range of employee profile information

• online check stubs, pay history reports and W-2s

• employee-specific benefits content, including summary plan descriptions, enrollment status and tools to assist with benefits selection

• access to 401(k) retirement plan information

• e-Learning web-based training

• links to benefits providers and other key vendors

• performance management tools including self-reviews and review history

• ability to submit time and attendance information, absences and paid time off requests

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• mobile access to view a wide range of employee-specific information such as pay stub, insurance coverage and ID card, 401(k) balances and other commonly accessed data

Personnel Management. In addition to the services that we deliver through Insperity Premier, we provide a wide variety of personnel management services that give our clients access to HR advisors and additional resources normally found only in the human resources departments of large companies. All PEO HR Outsourcing solutions clients have access to our advice concerning personnel policies and practices, including recruiting, discipline and termination procedures. Other personnel management services we provide include:

• drafting and reviewing personnel policies and employee handbooks

• designing job descriptions

• performing prospective employee screening and background investigations

• designing performance appraisal processes and forms

• professional development and issues-oriented training

• employee counseling

• substance abuse awareness training

• outplacement services

• compensation guidance

Employer Liability Management. Under the CSA, we assume many of the employment-related responsibilities associated with the administrative functions, benefit plans administration and personnel management services we provide. For many of those employment-related responsibilities that are the responsibility of the client or of both the client and us, we may assist our clients in managing and limiting liability. This assistance may include safety-related risk management reviews as well as the implementation by our clients of safety programs designed to reduce workplace accidents and, consequently, workers’ compensation claims. We also provide guidance to clients for avoiding discrimination, sexual harassment and civil rights violations, and we assist with termination decisions when consulted to attempt to minimize liability on those grounds. While we do not provide legal services to our clients, we employ in-house and external counsel who specialize in several areas of employment law, have broad experience in disputes concerning the employer/employee relationship and provide support to our internal human resources professionals. As part of our comprehensive service, we also maintain employment practice liability insurance coverage for ourselves and our clients, monitor developments in HR-related laws and regulations, and notify clients of the potential effect of such changes on employer liability.

MarketPlace^SMprovided by Insperity^®. Through our many alliances with best-of-class providers, Insperity’s MarketPlace is an e-commerce portal that brings a wide range of products and services to our clients, WSEEs and their families. Through MarketPlace, which is provided through Insperity Premier, our clients also have the opportunity to offer their products and services to other clients and WSEEs.

Middle Market Solutions. We believe the middle market sector, which we generally define as those companies with employees ranging from approximately 150 to 5,000 WSEEs, has historically been under-served by the PEO industry. Currently, we have a dedicated sales management, service personnel and consulting staff who concentrate solely on the middle market sector. Our average number of WSEEs per month in our middle market sector increased19.2% over 2017, representing approximately 24.6% of our total paid WSEEs during 2018.

Other Product and Services Offerings

We offer other product and services offerings on a stand-alone basis and to our PEO HR Outsourcing solutions clients. We also strive to leverage our relationships with our customers to enable cross-selling of our various products and services.

During 2018 and 2017, revenues from our other products and services offerings as a percentage of our total revenues were 1.1% and 1.3%, respectively.

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Following are the key components of our other products and services, which are offered separately or as a bundle:

Traditional Payroll and Human Capital Management. Our Insperity Workforce Acceleration solution is a comprehensive human capital management and payroll services solution for clients that do not choose our PEO HR Outsourcing solutions. This solution combines a cloud-based human resources software suite that provides integrated payroll, HR administration and employee onboarding, benefits administration, performance management, and time and attendance functionality with HR guidance and tools, as well as reporting and analytics. In addition, through a strategic partner, Workforce Acceleration clients have access to a national, licensed insurance brokerage that specializes in the insurance needs of small businesses.

Time and Attendance. Our Time and Attendance products and services provide small to medium-sized businesses with software, hardware and services to track, allocate, and analyze employee resources and provide inputs into clients’ payroll processing and accounting systems. The service is primarily delivered as a cloud-based solution, including Insperity Premier for our PEO HR Outsourcing solutions clients.

Performance Management. Our Performance Management products and services provide human resources software offerings including Insperity^® PerformSmart^® a performance management cloud-based offering. Insperity PerformSmart is available to both our Workforce Optimization and Workforce Synchronization clients. For customers utilizing PerformSmart in conjunction with our PEO HR Outsourcing solutions, we provide access through Insperity Premier. Performance Management products are sold through online subscription arrangements and through various reseller arrangements.

Organizational Planning. Organizational Planning offers cloud-based software used by companies to facilitate the creation, management and communication of detailed organizational management charts. For customers utilizing OrgPlus RealTime in conjunction with our PEO HR Outsourcing solutions, we provide access through Insperity Premier.

Recruiting Services. Our Recruiting Services offer direct hire placement on an as-needed basis and provides outsourced support for individual requisitions or large-scale hiring projects. In addition, we provide consulting services to assist in the creation and maintenance of consistent hiring practices and retention strategies. We also provide compensation services, behavior-based interview training and talent assessment.

Employment Screening. Our Employment Screening services offer a customized approach to background-check reporting for companies. Services include criminal records checks; verification of employment history or education; driving record, civil record and credit history checks; and confirmation of extraordinary credentials.

Expense Management. Our Expense Management product delivers employee expense management solutions that automate employee expense reporting, enforce travel and expense policies, and provide management reporting and analysis. The service is delivered as a cloud-based solution.

Retirement Services. Our Retirement Services solutions deliver comprehensive 401(k) retirement plan recordkeeping and administrative services to small and medium-sized businesses, primarily in connection with a 401(k) retirement plan we sponsor for our PEO HR Outsourcing solutions clients. Services include employee education and enrollment, participant communications, elective deferral withholding and transmission, matching contribution calculation, loan and distribution processing, regulatory filing preparation and nondiscrimination testing.

Insurance Services. Our Insurance Services solutions offer assistance through our licensed insurance agency to small and medium-sized businesses throughout the United States to secure affordable, customizable business insurance packages and life, health and disability insurance policies. Insurance Services also assists individuals in obtaining insurance coverages.

Client Service Agreement

All PEO HR Outsourcing solutions clients execute a CSA with us. The CSA provides for an ongoing relationship between Insperity and the PEO HR Outsourcing solutions client. For most clients, the CSA generally is an annual contract subject to earlier termination by Insperity or the client upon 30 days’ written notice or upon shorter notice in the event of default. CSAs for our middle market clients are generally two-year contracts, subject to earlier termination by clients upon payment of a termination fee or otherwise by the parties upon an event of default. The CSA establishes our comprehensive service fee, which is subject to periodic adjustments to account for changes in the composition of the client’s workforce, employee benefit election changes, and statutory changes that affect our costs. Under the CSA, clients

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active in January of any year are obligated to pay the estimated payroll tax component of the comprehensive service fee in a manner that reflects the pattern of incurred payroll tax costs. This practice aligns clients’ payments to us with our obligations to make payments to tax authorities, which are higher in the earlier part of the year and decrease as limits on wages subject to payroll tax are reached.

The CSA also establishes the division of responsibilities between us and the client as co-employers. Pursuant to the CSA, we are responsible for personnel administration and for compliance with certain employment-related government regulations. In addition, we assume liability for payment of salaries and wages (as well as related payroll taxes) of our WSEEs and responsibility for providing specified employee benefits to such persons. These liabilities are not contingent on the prepayment by the client of the associated comprehensive service fee. Instead, as a result of our employment relationship with each of our WSEEs, we are liable for payment of salary and wages to the WSEEs as reported by the client and are responsible for providing specified employee benefits to such persons regardless of whether the client pays the associated comprehensive service fee. The client retains the employees’ services and remains liable for complying with certain government regulations that require control of the worksite or daily supervisory responsibility or is otherwise beyond our ability to assume. A third group of responsibilities and liabilities are assumed by both Insperity and the client where such concurrent responsibility is appropriate. The specific division of applicable responsibilities under our CSAs generally is as follows:

Insperity

• Payment of wages and salaries as reported by the client and related tax reporting and remittance (local, state and federal withholding, FICA, FUTA, state unemployment)

• Workers’ compensation compliance, procurement, management and reporting

• Compliance with the Code, COBRA, HIPAA and ERISA (for each employee benefit plan sponsored by Insperity), as well as monitoring changes in other governmental laws and regulations governing the employer/employee relationship and updating the client when necessary

• Offering benefits under Insperity-sponsored employee benefit plans that comply with PPACA requirements

• Employee benefits administration of plans sponsored solely by Insperity

Client

• Payment, through Insperity, of commissions, bonuses, vacations, paid time off, sick pay, paid leaves of absence, and severance payments

• Payment and related tax reporting and remittance of non-qualified deferred compensation and equity-based compensation

• Ownership and protection of all client intellectual property rights

• Compliance with OSHA regulations, EPA regulations, FLSA, FMLA, WARN, USERRA, and state and local equivalents and compliance with government contracting provisions

• Compliance with federal, state, and local pay or play health care mandates and all such other similar federal, state and local legislation

• Compliance with the National Labor Relations Act (“NLRA”), including all organizing efforts and expenses related to a collective bargaining agreement and related benefits

• Professional licensing requirements, fidelity bonding, and professional liability insurance

• Products produced and/or services provided

• COBRA, HIPAA, PPACA, the Code and ERISA compliance for client-sponsored benefit plans

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Concurrent

• Implementation of policies and practices relating to the employee/employer relationship

• Compliance with all federal, state and local employment laws, including Title VII of the Civil Rights Act of 1964, ADEA, Title I of ADA, the Consumer Credit Protection Act and immigration laws and regulations

We maintain employment practice liability insurance coverages (including coverages for our clients) to manage our exposure for various employee-related claims. Our incurred costs in excess of annual premiums with respect to this exposure have historically been insignificant to our operating results.

Because we are a co-employer with the client for some purposes, it is possible that we could incur liability for violations of such laws, even if we are not responsible for the conduct giving rise to such liability. Our CSA ordinarily addresses this issue by providing that the client will indemnify us for liability incurred to the extent the liability is attributable to conduct by the client. Notwithstanding this contractual right to indemnification, it is possible that we could be unable to collect on a claim for indemnification and may therefore be ultimately responsible for satisfying the liability in question.

In most instances, clients are required to remit their comprehensive service fees no later than one day prior to the applicable payroll date by wire transfer or automated clearinghouse transaction. Although we are ultimately liable, as the employer for payroll purposes, to pay employees for work previously performed, we retain the ability to terminate immediately the CSA and associated WSEEs or to require prepayment, letters of credit, or other collateral upon deterioration in a client’s financial condition or upon non-payment by a client. These rights, the periodic nature of payroll, and the overall quality of our client base have resulted in an excellent overall collections history.

PEO HR Outsourcing Solutions Clients

Insperity’s PEO HR Outsourcing solutions provide value-added, full-service human resources solutions we believe are most suitable to a specific segment of the small and medium-sized business community. We target successful businesses with approximately 10 to 5,000 employees that recognize the advantage in the strategic use of high-performance human resources practices. We have set a long-term goal to serve approximately 10% of the overall small and medium-sized business community in terms of WSEEs. We serve clients and WSEEs located throughout the United States.

By region, our revenue distribution for the year ended December 31, 2018, were as follows:

Please read Note 1 “Accounting Policies,” to the Consolidated Financial Statements for additional information related to the change in revenues by region.

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All prospective PEO HR Outsourcing solutions clients are evaluated on the basis of a comprehensive analysis of employer-related risks entailing many factors, including industry and operations, workplace safety and workers’ compensation, unemployment history, operating stability, group medical information, human resources practices and other employer risks. As part of our client selection strategy, we strive to minimize offering our PEO HR Outsourcing solutions to businesses falling within certain specified NAICS (North American Industry Classification System) codes for those industries that we believe present a higher employer risk such as employee injury, high turnover or litigation.

Our PEO HR Outsourcing solutions client base is broadly distributed throughout a wide variety of industries including:

This diverse client base lowers our exposure to downturns or volatility in any particular industry. However, our performance could be affected by a downturn in one of these industries or by general economic conditions within the small and medium-sized business community.

We focus heavily on client retention. During 2018 and 2017, our retention rate was approximately 86% and 85%, respectively. For all PEO HR Outsourcing solutions clients, the average annual retention rate over the last five years was approximately 84%. Client attrition is attributable to a variety of factors, including: (1) client non-renewal due to price or service factors; (2) client business failure, sale, merger, or disposition; (3) our termination of the CSA resulting from the client’s non-compliance or inability to make timely payments; and (4) competition from other PEOs or business services firms.

Insperity 11 2018 Form 10-K

BUSINESS

Marketing and Sales

As of December 31, 2018, we had 67 PEO HR Outsourcing solutions sales offices located in 33 markets. Our sales offices typically consist of six to eight Business Performance Advisors (“BPAs”), a district sales manager, and an office administrator. To take advantage of economic efficiencies, multiple sales offices may share a physical location. Insperity’s markets and their respective year of entry are as follows:

Market	Sales Offices	Initial Entry Date
Houston	7	1986
San Antonio	1	1989
Austin	1	1989
Orlando	1	1989
Dallas/Fort Worth	5	1993
Atlanta	3	1994
Phoenix	1	1995
Chicago	4	1995
Washington D.C.	2	1995
Denver	2	1996
Los Angeles	6	1997
Charlotte	1	1997
St. Louis	1	1998
San Francisco	3	1998
New York	5	1999
Baltimore	2	2000
Newark	2	2000
San Diego	1	2001
Boston	3	2001
Minneapolis	2	2002
Raleigh	1	2006
Kansas City	1	2007
Columbus	1	2010
Nashville	1	2011
Philadelphia	2	2012
Seattle	1	2015
Indianapolis	1	2016
Fort Lauderdale	1	2017
Milwaukee	1	2017
Oklahoma City	1	2018
Pittsburgh	1	2018
San Jose	1	2018
Stamford	1	2018

We identify markets using a systematic market evaluation and selection process. We continue to evaluate a broad range of factors in the selection process, using a market selection model that weighs various criteria that, based on our experience, we believe are reliable predictors of successful penetration. Among the factors we consider are:

Insperity 12 2018 Form 10-K

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• market size, in terms of small and medium-sized businesses engaged in selected industries that meet our risk profile

• market receptivity to PEO services, including the regulatory environment and relevant history with other PEO providers

• existing relationships within a given market, such as vendor or client relationships

• expansion cost issues, such as advertising and overhead costs

• direct cost issues that bear on our effectiveness in controlling and managing the cost of our services, such as workers’ compensation and health insurance costs, unemployment risks, and various legal and other factors

• a comparison of the services we offer to alternatives available to small and medium-sized businesses in the relevant market, such as the cost to the target clients of procuring services directly or through other PEOs

• long-term strategy issues, such as the general perception of markets and our estimate of the long-term revenue growth potential of the market

We develop a mix of national and local advertising media and a placement strategy tailored to each individual market. After selecting a market and developing our marketing mix, but prior to entering the market, we engage in an organized media and public relations campaign to prepare the market for our entry and to begin the process of generating sales leads. We market our services through various business promotions and a broad range of media outlets, including the Internet, television, radio, newspapers, periodicals and direct mail. We employ public relations firms for most of our markets as well as advertising consultants to coordinate and implement our marketing campaigns. We have developed an inventory of television, radio and newsprint advertisements, which are utilized in this effort.

We routinely seek to develop new marketing approaches and campaigns to capitalize on changes in the competitive landscape for our human resources services and to more successfully reach our target market. We have an agreement with the Professional Golf Association Champions Tour to be the title sponsor of the annual Insperity Invitational^™ presented by UnitedHealthcare^® professional golf tournament held annually in The Woodlands, Texas (a suburb of Houston). In addition, we have an arrangement with Jim Nantz, a sports commentator, to serve as our national spokesperson. Our marketing campaigns use this event and the relationship with Mr. Nantz as a focal point of our brand marketing efforts.

Our organic growth model generates sales leads from five primary sources: direct sales efforts, advertising, third-party channel programs, referrals, marketing alliances, and the Internet. These leads result in initial presentations to prospective PEO HR Outsourcing solutions clients, and ultimately, prospective PEO HR Outsourcing solutions client business profiles. A prospective PEO HR Outsourcing solutions client’s business profile reflects information gathered by the BPA about the prospect’s employees, including base compensation, level of benefits coverage options, job classification, state of employment and workers’ compensation classification. This information is used to generate a bid from our customized bid system, which applies Insperity’s proprietary pricing model to the census data. Concurrent with this process, we evaluate prospective clients through the previously described comprehensive employer risk analysis. Upon completion of a favorable employer risk evaluation, the BPA presents the bid and attempts to complete the sale and enroll the prospect. Our selling process typically takes approximately 90 days for clients with less than 150 employees, and 180 days or longer for middle market clients. The process can be extended during economic downturns.

We have implemented cross-selling channels between our PEO HR Outsourcing solutions business and our other products and services. This cross-selling strategy focuses on using our PEO HR Outsourcing solutions to increase market penetration in each of our other products and services and using our other product and service offerings as a source of leads for our PEO HR Outsourcing solutions. The cross-selling channels attempt to reduce barriers to selling our products and services and allow us to tailor service packages to better meet the specific needs of the business.

Competition

We provide a value-added, full-service human resources solution through our PEO HR Outsourcing solutions, which we believe is most suitable to a specific segment of the small and medium-sized business community. This full-service approach is exemplified by our commitment to provide a high level of service and technology personnel, which has produced a ratio of corporate staff to WSEEs (the “staff support ratio”) that is higher than average for the PEO industry.

Insperity 13 2018 Form 10-K

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Based on an analysis of the 2015 through 2017 annual NAPEO surveys of the PEO industry, we have successfully leveraged our full-service approach into significantly higher returns for Insperity on a per WSEE per month basis. During the three-year period from 2015 through 2017, our staff support ratio averaged 53% higher than the PEO industry average. During the same three-year period, our gross profit per WSEE and operating income per WSEE exceeded industry averages by 140% and 183%, respectively.

Competition in the PEO industry revolves primarily around quality of services, scope of services, choice and quality of benefits packages, reputation, and price. We believe reputation, national presence, regulatory expertise, financial resources, risk management, and information technology capabilities distinguish leading PEOs from the rest of the industry. We also believe we compete favorably in these areas; however, other PEOs may offer their PEO services at lower prices than we offer.

Due to the differing geographic regions and market segments in which most PEOs operate, and the relatively low level of market penetration by the industry, we consider our primary competition for our PEO HR Outsourcing solutions to be the traditional in-house provision of human resources services. The PEO industry is highly fragmented, and we believe Insperity is one of the largest PEO service providers in the United States. Our largest national competitors include the PEO divisions of large business services companies such as Automatic Data Processing, Inc. and Paychex, Inc., and other national PEOs, such as TriNet Group, Inc. In addition, we also face competition from: (1) fee-for-service providers such as payroll processors and human resources consultants; (2) human resources technology solution companies; and (3) large regional PEOs in certain areas of the country. As Insperity and other large PEOs expand nationally, we expect that competition may intensify.

Vendor Relationships

Insperity provides benefits to its WSEEs under arrangements with a variety of vendors. We consider our contracts with UnitedHealthcare (“United”) and the Chubb Group of Insurance Companies (“Chubb”) to be the most significant elements of our employee benefits package, as they would be the most difficult to replace.

We provide group health insurance coverage to our WSEEs through a national network of carriers including United, UnitedHealthcare of California, Kaiser Permanente, Blue Shield of California, HMSA BlueCross BlueShield of Hawaii and Tufts, all of which provide fully insured policies or service contracts. The health insurance contract with United provides approximately 86% of our health insurance coverage and expires on December 31, 2022, subject to cancellation by either party upon 180 days’ notice. For a discussion of our contract with United, which is accounted for using a partially self-funded insurance accounting model, please read Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Critical Accounting Policies and Estimates—Benefits Costs.”

Our workers’ compensation coverage (the “Chubb Program”) has been provided through an arrangement with Chubb (formerly ACE American Insurance Company) since 2007. The Chubb Program is a fully insured program whereby Chubb has the responsibility to pay all claims incurred under the policies regardless of whether we satisfy our responsibilities. For additional discussion of the Chubb Program, which includes terms shifting some of the economic burden to us, please read Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Critical Accounting Policies and Estimates—Workers’ Compensation Costs.”

Information Technology

Insperity utilizes a variety of information technology capabilities to provide its PEO HR Outsourcing solutions and business performance improvement services to its clients and WSEEs and for its own administrative and management information requirements.

Insperity’s PEO HR Outsourcing solutions information systems, which include Insperity Premier, are a proprietary mix of applications that includes both internally developed and licensed software applications. These systems manage a wide range of transactions and information specific to our PEO HR Outsourcing solutions, to Insperity and to our clients and WSEEs, including:

• WSEE enrollment

• human resources management and employee administration

Insperity 14 2018 Form 10-K

BUSINESS

• benefits and defined contribution plan administration

• time and attendance collection and administration

• payroll processing

• client invoicing and collection

• management information and reporting

• sales bid calculations

Central to these systems are transaction processing capabilities that allow us to process a high volume of employee enrollment, employee administration, payroll, invoice and bid transactions that meet the specific needs of our clients and prospects. We administer our employee benefits through a proprietary application designed to process employee eligibility and enrollments, manage carrier relationships and maintain a variety of plan offerings. Our retirement services operations are conducted utilizing an industry-leading retirement plan administration application in a third-party hosted environment. Aspects of all of these components are delivered to our PEO HR Outsourcing solutions clients and WSEEs through Insperity Premier. We utilize commercially available software for other business functions such as finance and accounting, sales force activity management and customer relationship management.

Our products and services utilize a variety of owned and licensed software applications to deliver business performance improvement services to our clients, including to some of our PEO HR Outsourcing solutions clients.

Insperity has hosting facilities located at two separate leased facilities, located in Bryan, Texas and The Woodlands, Texas. These facilities host the majority of our business applications, telecommunications equipment, information security infrastructure and network equipment. Each hosting facility houses a mix of primary production applications, disaster recovery, replication and back-up applications, and pre-production environments, with the Bryan facility acting as our primary data center for all mission-critical applications. Both hosting facilities have the capacity to run all of our critical business applications and have sufficient capacity to handle all of our operations on a stand-alone basis, if required. We have an active Business Continuity Plan, which includes information technology capabilities and we utilize a variety of measures to ensure our Business Continuity Plan remains effective and available.

Our network infrastructure is designed to ensure appropriate connectivity exists among all of our facilities and employees and provides appropriate Internet connectivity to conduct business with our clients and WSEEs. The network infrastructure is provided through industry standard core network hardware and via high-speed network services provided by multiple vendors.

We have incorporated a variety of measures to maintain the security and privacy of the information managed through our systems and applications. These measures include industry standard technologies designed to protect, monitor and assess our data centers and network environment; best practice security policies and procedures; and a variety of measures designed to control access to sensitive and private information.

Industry Regulations

The operations for our PEO HR Outsourcing solutions are affected by numerous federal and state laws relating to tax, insurance and employment matters. By entering into a co-employer relationship with our WSEEs, we assume certain obligations and responsibilities of an employer under these federal and state laws. Because many of these federal and state laws were enacted prior to the development of nontraditional employment relationships, such as PEOs, temporary employment and outsourcing arrangements, many of these laws do not specifically address the obligations and responsibilities of nontraditional employers. Currently, 42 states have passed laws that recognize PEOs or require licensing, registration or certification requirements for PEOs, and several others are considering such regulation. The SBEA, which was enacted in 2014, established a certification program and created a federal regulatory framework for the payment of wages to WSEEs and for the reporting and remittance of federal payroll taxes on those wages paid by CPEOs. In 2016, our PEO subsidiary, Insperity PEO Services, L.P., received its designation as a CPEO from the IRS effective as of January 1, 2017. Please read Item 1. “Business – PEO Industry” for further information.

Insperity 15 2018 Form 10-K

BUSINESS

As an employer, we are subject to federal statutes and regulations governing the employer/employee relationship. Subject to the issues discussed below, we believe that our operations are in compliance, in all material respects, with all applicable federal statutes and regulations.

Employee Benefit Plans

We offer various employee benefits plans to eligible employees, including our WSEEs. These plans include:

• a group health plan, which includes medical, dental, vision and prescription drug coverage, as well as a work-life program

• a 401(k) retirement plan

• cafeteria plans under Code Section 125

• a health savings account program

• a welfare benefits plan, which includes life, disability, and accidental death and dismemberment coverage

• a health care flexible spending account plan

• an educational assistance program

• an adoption assistance program

• a commuter benefits program

Generally, employee benefit plans are subject to provisions of the Code, ERISA, and COBRA. The number and complex nature of federal and state regulations relating to employer-sponsored health plans has continued to increase over time. We believe that additional regulatory burdens placed on employers can increase the demand for our services because small and medium-sized businesses are especially challenged in their efforts to comply with governmental regulations due to limited resources and a lack of expertise. As a co-employer in the PEO relationship, we assume or share many of the employer-related responsibilities and assist our clients in complying with many employment-related governmental laws and regulations. Historically, we believe that we have successfully marketed the compliance component of our service offering and that our compliance-related services have increased the value proposition of our service offering.

Employer Status. In order to qualify for favorable tax treatment under the Code, employee benefit plans must be established and maintained by an employer for the exclusive benefit of its employees. Generally, an entity is an “employer” of individuals for federal employment tax purposes if an employment relationship exists between the entity and the individuals under the common law test of employment. In addition, the officers of a corporation are deemed to be employees of that corporation for federal employment tax purposes. The common law test of employment, as applied by the IRS, involves an examination of approximately 20 factors to ascertain whether an employment relationship exists between a worker and a purported employer. Generally, the test is applied to determine whether an individual is an independent contractor or an employee for federal employment tax purposes and not to determine whether each of two or more companies is a “co-employer.” Substantial weight is typically given to the question of whether the purported employer has the right to direct and control the details of an individual’s work. Among the factors that appear to have been considered more important by the IRS are:

• the employer’s degree of behavioral control (the extent of instructions, training and the nature of the work)

• the financial control or the economic aspects of the relationship

• the intended relationship of the parties (whether employee benefits are provided, whether any contracts exist, whether services are ongoing or for a project, whether there are any penalties for discharge/termination, and the frequency of the business activity)

ERISA Requirements. Employee pension and welfare benefit plans are also governed by ERISA. ERISA defines “employer” as “any person acting directly as an employer, or indirectly in the interest of an employer, in relation to an employee benefit plan.” ERISA defines the term “employee” as “any individual employed by an employer.” The United

Insperity 16 2018 Form 10-K

BUSINESS

States Supreme Court has held that the common law test of employment must be applied to determine whether an individual is an employee or an independent contractor under ERISA. A definitive judicial interpretation of “employer” in the context of a PEO or employee leasing arrangement has not been established.

If Insperity were found not to be an employer with respect to WSEEs for ERISA purposes, its plans would not comply with ERISA. Further, as a result of such finding, Insperity and its plans would not enjoy, with respect to WSEEs, the preemption of state laws provided by ERISA and could be subject to varying state laws and regulations as well as to claims based upon state common laws. Even if such a finding were made, we believe we would not be materially adversely affected because we would endeavor to make available similar benefits at comparable costs.

In addition to ERISA and the Code, issues related to the relationship between Insperity and its WSEEs may also arise under other federal laws, including other federal income tax laws.

Patient Protection and Affordable Care Act. The PPACA was signed into law on March 23, 2010. The PPACA was subsequently amended on March 30, 2010, by the Reconciliation Act. The PPACA and the Reconciliation Act (collectively the “Act”) entail sweeping health care reforms with original staggered effective dates from 2010 through 2018, some of which were subsequently extended until as late as 2020. While the Act did not have a material adverse impact on our results of operations in 2018, the future impact of the following provisions or changes to the provisions, including any changes or a repeal that may be proposed by this Congressional session, is unknown at this time.

Beginning in 2014, the Act provided for the establishment of state insurance exchanges (“Exchanges”) to make health insurance available to individuals and small employers (initially defined as 100 employees or less). States had the option of building a state-based exchange, entering into a state-federal partnership exchange or accepting the federally-facilitated exchange. States that accept the federally-facilitated exchange can transition to a state-based exchange at a later date. The Exchanges provide consumers with educational services and information on available options and offer a variety of health plans. Small business tax credits and subsidies are available to qualifying businesses and individuals who purchase health insurance through the Exchanges. As part of the Tax Cuts and Jobs Act enacted in December 2017, the requirements that individuals maintain health insurance coverage or pay a penalty, which was known as the individual mandate, was effectively eliminated beginning in 2019. At this time, the Exchanges, tax credits, and subsidies have not had a material impact on our operations, but the impact of future changes to these provisions is unknown.

Additionally in 2014, the Act ushered in a number of insurance market reforms for the small group and individual markets. The reforms required guaranteed issue and renewability of coverage, eliminated certain underwriting practices by issuers, consolidated the number of risk pools in each state and restricted the permissible factors and variable ranges of those factors that can be considered in determining health insurance premiums. Transition relief permitted states to delay the effective date of some of these reforms. At this time, we are unable to determine whether the insurance market reforms will have an adverse impact on our business operations, our ability to attract and retain clients, or our ability to increase service fees to offset any increased costs.

The health insurance industry became subject to additional excise taxes in 2014, and reinsurance taxes were imposed on insurers and third-party administrators for the purpose of helping to offset the cost for insurance covering high-risk individuals. As the policyholder, all or a portion of these increased costs were passed on to us by our carriers. At this time, these taxes have not had a material impact on our operations, but the impact of future changes to these provisions is unknown.

Effective January 1, 2015, “pay or play” requirements applied to large employers with at least 50 full-time and full-time equivalent employees in the prior calendar year (“Applicable Large Employers” or “ALEs”). ALEs who fail to offer “minimum essential coverage” satisfying minimum value and affordability requirements may be subject to a penalty if a full-time employee obtains coverage from an Exchange and receives a subsidy or tax credit for such coverage. While clients are responsible for employer pay or play health care mandates under the CSA, the Insperity Group Health Plan qualifies as minimum essential coverage and is designed to satisfy the minimum value and affordability requirements. Clients are not required to use the affordability safe harbor utilized by us.

Information contained in the Congressional Record, which specifically references PEOs, indicates that any pay or play penalties should apply separately to clients of a PEO and not at the PEO level. However, the Act and subsequently issued IRS guidance do not expressly address the issue of whether the pay or play penalties apply only at the client level or whether the penalties can be applied at the PEO level. At this time, we are unable to determine if pay or play penalties may be assessed against a PEO for coverage provided to WSEEs under a PEO sponsored plan.

Insperity 17 2018 Form 10-K

BUSINESS

The effective date of the rules imposing excise taxes on employers and insurers who offer excessive health benefits under so-called “Cadillac plans” has been delayed until 2022. We anticipate taking appropriate steps to avoid, to the extent necessary and possible, benefits under our group health plan from triggering such excise taxes, which our carrier may pass on to us in the form of increased premiums. At this time, we are unable to determine the effect that the excise taxes will have on our ability to match pricing with any increased costs.

401(k) Retirement Plans. Our 401(k) Retirement Plan for WSEEs are operated pursuant to guidance provided by the IRS under Revenue Procedure 2002-21 and Revenue Procedure 2003-86, each of which provides guidance for the operation of defined contribution plans maintained by PEOs that benefit WSEEs. This guidance provides qualification standards for PEO plans that, if met, negate the inquiry of common law employer status for purposes of the exclusive benefit rule. All of Insperity’s 401(k) Retirement Plans have received determination letters from the IRS confirming the qualified status of the plans.

Employment Taxes

As a co-employer, Insperity assumes responsibility and liability for the payment of federal and state employment taxes with respect to wages and salaries paid to our WSEEs. There are essentially three types of federal employment tax obligations included in Subtitle C - Employment Taxes of the Code:

• withholding of income tax requirements governed by Code Section 3401, et seq.

• obligations under FICA, governed by Code Section 3101, et seq.

• obligations under FUTA, governed by Code Section 3301, et seq.

Under these Code sections, employers have the obligation to withhold and remit the employer portion and, where applicable, the employee portion of these taxes.

The SBEA provides that a CPEO shall be treated as the employer under Subtitle C – Employment Taxes of the Code, and shall be responsible for reporting federal employment taxes rather than the CPEO clients. Insperity PEO Services, L.P. received its designation as a CPEO from the IRS effective as of January 1, 2017.

For any client CSA that is not a CPEO contract, Code Section 3401, which applies to federal income tax withholding requirements, contains an exception to the general common law test applied to determine whether an entity is an “employer” for purposes of federal income tax withholding. Code Section 3401(d)(1) states that if the person for whom services are rendered does not have control of the payment of wages, the “employer” for this purpose is the person having control of the payment of wages. The Treasury regulations issued under Code Section 3401(d)(1) state that a third party can be deemed to be the employer of workers under this section for income tax withholding purposes where the person for whom services are rendered does not have legal control of the payment of wages. While several courts have examined Code Section 3401(d)(1), its ultimate scope has not been delineated. Moreover, the IRS has to date relied extensively on the common law test of employment in determining liability for failure to comply with federal income tax withholding requirements.

Accordingly, while we believe that we can assume the withholding obligations for WSEEs, in the event we fail to meet these obligations, the client may be held ultimately liable for those obligations. While this interpretive issue has not to our knowledge discouraged clients from enrolling with Insperity, there can be no assurance that a definitive adverse resolution of this issue would not do so in the future. These interpretive uncertainties may also impact our ability to report employment taxes on our own account rather than the accounts of our clients.

Unemployment Taxes

We record our state unemployment (“SUI”) tax expense based on taxable wages and tax rates assigned by each state. State unemployment tax rates vary by state and are determined, in part, based on Insperity’s prior years’ compensation experience in each state. Certain rates are determined, in part, by each client’s own compensation experience. In addition, states have the ability under law to increase unemployment tax rates, including retroactively, to cover deficiencies in the unemployment tax funds. Rate notices are typically provided by the states during, or prior to, the first quarter of each year; however, some notices are received later. Until we receive the final tax rate notices, we estimate our expected SUI rate in those particular states.

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State Regulation

While some states do not explicitly regulate PEOs, 42 states have adopted provisions for licensing, registration, certification or recognition of PEOs, and several others are considering such regulation. Such laws vary from state to state but generally provide for monitoring the fiscal responsibility of PEOs, and in some cases codify and clarify the co-employment relationship for unemployment, workers’ compensation and other purposes under state law. We believe that we are in compliance with the material requirements in all 42 states that have such laws. Regardless of whether a state has licensing, registration or certification requirements for PEOs, we must comply with a number of other state and local regulations that could impact our operations.

Corporate Office Employees

We had approximately 3,200 corporate employees as of December 31, 2018. We believe our relations with our corporate employees are good. None of our corporate employees are covered by a collective bargaining agreement.

Intellectual Property

Insperity currently has registered trademarks, copyrights and other intellectual property. We believe that our trademarks as a whole are of considerable importance to our business.

Insperity 19 2018 Form 10-K

RISK FACTORS

Item 1A.  Risk Factors.

The statements in this section describe the known material risks to our business and should be considered carefully.

Adverse economic conditions could negatively affect our industry, business, and results of operations.

The small and medium-sized business market is sensitive to changes in economic activity levels as well as the credit markets. As a result, the demand for the outsourced HR services we provide clients could be adversely impacted by weak economic conditions or difficulty obtaining credit. Current and prospective clients may respond to such conditions by reducing employment levels, compensation levels, employee benefit levels and outsourced HR services. In addition, during periods of weak economic conditions, current clients may have difficulty meeting their financial obligations to us and may select alternative HR services at more competitive rates than we offer. Such developments could adversely impact our financial condition, results of operations and future growth rates.

We assume liability for WSEE payroll, payroll taxes, and benefits costs and are responsible for their payment regardless of the amount billed to or paid by our clients.

Under the CSA, we become a co-employer of WSEEs and assume the obligations to pay the salaries, wages and related benefits costs and payroll taxes of such WSEEs. We assume such obligations as a principal, not as an agent of the client. Our obligations include responsibility for:

• payment of the salaries and wages for work performed by WSEEs, regardless of whether the client timely pays us the associated service fee

• withholding and payment of federal and state payroll taxes with respect to wages and salaries reported by Insperity

• providing benefits to WSEEs even if our costs to provide such benefits exceed the fees the client pays us

If a client does not pay us, or if the costs of benefits we provide to WSEEs exceed the fees a client pays us, our ultimate liability for WSEE payroll and benefits costs could have a material adverse effect on our financial condition or results of operations.

Increases in health insurance costs or inability to secure replacement contracts on competitive terms could have a material adverse effect on our financial condition or results of operations.

Maintaining health insurance plans that cover WSEEs is a significant part of our business. Our primary health insurance contract expires on December 31, 2022, subject to cancellation by either party upon 180 days’ notice. In the event we are unable to secure replacement contracts on competitive terms, significant disruption to our business could occur.

Health insurance costs are in part determined by our claims experience and comprise a significant portion of our direct costs. If we experience an increase in the number or severity of claims, our health insurance costs could increase. Claim activity levels and costs are impacted by a number of factors, including, but not limited to, macro-economic changes, proposed and enacted regulatory changes and medical outbreaks. Contractual arrangements with our clients limit or delay our ability to incorporate increases in costs into our service fees. As a result, such increases could have a material adverse effect on our financial condition or results of operations. For additional information related to our health insurance costs, please read Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Critical Accounting Policies and Estimates—Benefits Costs.”

Health care reform could affect our health insurance plan and could lead to a significant disruption in our business.

The PPACA was signed into law on March 23, 2010. The PPACA was subsequently amended on March 30, 2010 by the Reconciliation Act. The Act entails sweeping health care reforms with original staggered effective dates from 2010 through 2018, some of which were subsequently extended out as far as 2022. Some provisions in the Act still require the issuance of additional guidance from the U.S. Department of Health and Human Services (“HHS”) and the states.

Beginning in 2014, a number of key provisions of the Act took effect, including the Exchanges, insurance market reforms and the imposition of excise taxes on the health insurance industry and reinsurance taxes on insurers and third-party administrators. Additionally, the pay or play penalties on Applicable Large Employers were fully phased-in by 2016. As part

Insperity 20 2018 Form 10-K

RISK FACTORS

of the Tax Cuts and Jobs Act enacted in December 2017, the requirements that individuals maintain health insurance coverage or pay a penalty, which was known as the individual mandate, was effectively eliminated beginning in 2019. In January 2018, the excise tax for offering “Cadillac Plans” was further delayed until 2022. In addition, supporters in various states are advocating for adoption of healthcare-related reforms at the state level. Collectively, these items have the potential to significantly change the insurance marketplace for small and medium sized businesses and how employers provide insurance to employees. In addition, as a co-employer in the PEO relationship, we assume or share many of the employer-related responsibilities and assist our clients in complying with many employment-related governmental regulations. Generally, the Act and subsequently issued guidance by the IRS and HHS have not addressed or in some instances are unclear as to their application in the PEO relationship or whether such provisions should be applied at the PEO or client level.

Although we do not believe that the Act has had a material adverse effect on our benefit plans, business model, or operations to date, the elimination of the penalty associated with the individual mandate and subsequent changes resulting from action that may be taken at the federal or state level, including repeal or repeal and replacement of the Act as has been advocated by Congressional leaders and the administration of President Trump, may impact our benefit plans, business model and future results of operations. In future periods, changes may result in increased costs to us and could affect our ability to attract and retain clients. Additionally, contractual arrangements and competitive market conditions may limit or delay our ability to increase service fees to offset any associated potential increased costs. For additional information related to the Act, please read Item 1. “Business - Industry Regulations - Patient Protection and Affordable Care Act.” We are currently unable to determine whether potential future changes to the Act or other regulatory action, including at the state level, may adversely affect our business or market conditions.

Increases in workers’ compensation costs or inability to secure replacement coverage on competitive terms could lead to a significant disruption to our business.

Our workers’ compensation coverage has been provided through an arrangement with Chubb (formerly ACE American Insurance Company) since 2007. Under our current arrangement with Chubb, we have a financial responsibility to Chubb for the first $1 million layer of claims per occurrence and for claims over $1 million, up to a maximum aggregate amount of $6 million per policy year for claims that exceed the first $1 million. Chubb bears the financial responsibility for all claims in excess of these levels. The Chubb Program is a fully insured program whereby Chubb has the responsibility to pay all claims incurred under the policies regardless of whether we satisfy our responsibilities. For additional discussion of our policy with Chubb, please read Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Critical Accounting Policies and Estimates—Workers’ Compensation Costs.”

Workers’ compensation costs are a significant portion of our direct costs. If we were to experience an unexpected large increase in the number or severity of claims, our workers’ compensation costs could increase, which could have a material adverse effect on our results of operations or financial condition.

The current workers’ compensation coverage with Chubb expires on September 30, 2019. In the event we are unable to secure replacement coverage on competitive terms, significant disruption to our business could occur.

Our ability to adjust and collect service fees for increases in unemployment tax rates may be limited.

We record our SUI tax expense based on taxable wages and tax rates assigned by each state. SUI tax rates vary by state and are determined, in part, based on prior years’ compensation experience in each state. Prior to the receipt of final tax rate notices, we estimate our expected SUI tax rate in those states for which tax rate notices have not yet been received for purposes of pricing. In a period of adverse economic conditions state unemployment funds may experience a significant increase in the number of unemployment claims. Accordingly, SUI tax rates would likely increase substantially. Some states have the ability under law to increase SUI tax rates retroactively to cover deficiencies in the unemployment fund. In addition, FUTA may be retroactively increased in certain states in the event the state fails to timely repay federal unemployment loans.

Generally, our contractual agreements allow us to incorporate such statutory tax increases into our service fees upon the effective date of the rate change. However, our ability to fully adjust service fees in our billing systems and collect such increases over the remaining term of the clients’ contracts could be limited, resulting in a potential tax increase not being fully recovered. As a result, such increases could have a material adverse effect on our financial condition or results of operations.

Insperity 21 2018 Form 10-K

RISK FACTORS

Many of our contracts for our PEO HR Outsourcing solutions may be canceled on short notice.  Our inability to renew client contracts or attract new clients could materially and adversely affect our financial conditions or results of operations.

Our standard CSA can generally be canceled by us or the client with 30 days’ notice. Accordingly, the short-term nature of the CSA makes us vulnerable to potential cancellations by existing PEO HR Outsourcing Solution clients, which could materially and adversely affect our financial condition or results of operations. In addition, in the event we have a high proportion of terminating clients from our middle market client base (which are generally subject to CSAs with two-year terms), the financial impact of such an event could be significant due to the number of WSEEs involved and the longer time it takes to replace middle market clients. Also, our results of operations are dependent in part upon our ability to retain or replace our clients upon the termination or cancellation of the CSA. Our client attrition rate was approximately 14% in 2018. There can be no assurance that the number of contract cancellations will continue at these levels and such cancellations may increase in the future due to various factors, including economic conditions in the markets we operate. Clients electing to purchase our services or electing an alternative solution often do so at the beginning of the calendar year. As a result, we typically experience our largest concentration of new client additions and attrition in the first quarter of each year.

We may be subject to liabilities for client and employee actions.

A number of legal issues remain unresolved with respect to the co-employment arrangement between a PEO and its WSEEs, including questions concerning the ultimate liability for violations of employment, payroll, discrimination, and workplace safety laws. Our CSA establishes the contractual division of responsibilities between Insperity and our clients for various personnel management matters, including compliance with and liability under various governmental regulations.

Because we act as a co-employer, we may be subject to liability for violations of various employment, payroll, discrimination, and workplace safety laws despite these contractual provisions, even if we do not participate in such violations. Although the CSA generally requires the client to indemnify us for certain liabilities attributable to the client’s conduct, we may not be able to collect on such a contractual indemnification claim and thus may be responsible for satisfying such liabilities to the extent that such liabilities are not covered or insured against under our insurance policies. In addition, WSEEs may be deemed to be our agents, which may subject us to liability for the actions of such WSEEs.

Competition and other developments in the HR services industry may impact our growth and/or profitability.

The human resources services industry, including the PEO industry, is highly fragmented. Many PEOs have limited operations and fewer than 1,000 WSEEs, but there are several industry participants that are comparable to our size or larger. We also encounter competition from “fee for service” companies such as payroll processing firms, insurance companies, human resources consultants and human resources technology solutions as well as cloud-based self-service bundled human resources offerings. Our competitors include the PEO divisions of large business services companies, such as Automatic Data Processing, Inc. and Paychex, Inc., and other national PEOs such as TriNet Group, Inc. In many cases, these competitors offer a reduced service PEO offering at a lower price than our PEO HR Outsourcing solutions. We expect that as the PEO industry grows and its regulatory framework becomes better established, well organized competition with greater resources than we have may enter the PEO market, possibly including large “fee for service” companies currently providing a more limited range of services. In addition, competitors may be able to offer or develop new technology-based lower service models that may require us to make substantial investments in order to effectively compete.

We offer a lower priced reduced service level PEO offering referred to as Workforce Synchronization in response to certain middle market client needs and the evolving PEO marketplace. As of December 2018, approximately 14% of our WSEEs were co-employed by Workforce Synchronization clients. In the event we were to experience a significant increase in the number of clients using the Workforce Synchronization offering or increased pricing pressures in the PEO marketplace without corresponding reductions in operating costs, our operating margins may decline, which could have a material adverse impact on our financial condition or results of operations.

Insperity 22 2018 Form 10-K

RISK FACTORS

Changes in federal, state and local regulation or our inability to obtain licenses under new regulatory frameworks could have a material adverse effect on our results of operations or financial condition.

As a major employer, our operations are affected by numerous federal, state and local laws and regulations relating to labor, tax, benefit, insurance and employment matters. By entering into a co-employer relationship with employees assigned to work at client locations, we assume certain obligations and responsibilities of an employer under these laws. However, many of these current laws (such as the Act, ERISA and federal and state employment tax laws) do not specifically address the obligations and responsibilities of non-traditional employers such as PEOs, and the definition of “employer” under these laws is not uniform despite the SBEA having provided clarification under federal employment tax laws for CPEOs. In addition, many of the states in which we operate have not addressed the PEO relationship for purposes of compliance with applicable state laws governing the employer/employee relationship or PEO health insurance plans. Any adverse application of, or adverse legislative/regulatory response to, new or existing federal or state laws to the PEO relationship with our WSEEs and client companies could have a material adverse effect on our results of operations or financial condition.

While some states do not explicitly regulate PEOs, 42 states have passed laws that have recognition, licensing, certification or registration requirements for PEOs and several other states are considering such regulation. Such laws vary from state to state, but generally provide for monitoring the fiscal responsibility of PEOs, and in some cases codify and clarify the co-employment relationship for unemployment, workers’ compensation and other purposes under state law. In addition, the SBEA provides certain benefits for companies that qualify as a CPEO. While we generally support licensing regulation because it serves to validate the PEO relationship, we may not be able to satisfy licensing requirements or other applicable regulations for all states. In addition, there can be no assurance that we will be able to renew our licenses in all states or that we will be able to maintain our CPEO designation.

Geographic market concentration makes our results of operations vulnerable to regional economic factors.

Our New York, California and Texas markets accounted for approximately 10%, 16% and 22% (including 10% in Houston), respectively, of our WSEEs for the year ended December 31, 2018. Accordingly, while we have a goal of expanding in our current markets and into new markets, for the foreseeable future, a significant portion of our revenues may be subject to economic, statutory, and regulatory factors specific to New York, California and Texas.

A determination that a client is liable for employment taxes not paid by a PEO may discourage clients from contracting with us in the future.

Under the CSA, we assume sole responsibility and liability for paying federal employment taxes imposed under the Code with respect to wages and salaries we pay our WSEEs. There are essentially three types of federal employment tax obligations:

• income tax withholding requirements

• FICA

• FUTA

Under the Code, employers have the obligation to withhold and remit the employer portion and, where applicable, the employee portion of these taxes. The SBEA clarifies that a CPEO is treated as the employer for purposes of federal payroll taxes on wages it pays to WSEEs. Most states impose similar employment tax obligations on the employer. While the CSA provides that we have sole legal responsibility for making these tax contributions, the applicable state taxing authority could conclude that such liability cannot be completely transferred to us. Accordingly, in the event that we fail to meet our tax withholding and payment obligations, the client may be held jointly and severally liable for those obligations. While this interpretive issue has not, to our knowledge, discouraged clients from enrolling with Insperity, a definitive adverse resolution of this issue may discourage clients from enrolling in the future.

Failure of our information technology systems, including from cyber attacks and data breaches, could damage our reputation, materially disrupt our business operations, and increase our costs and cause losses.

Many of the HR services offerings we provide to clients are conducted through a technology infrastructure using both internally developed and purchased commercial software, a wide variety of hardware infrastructure technologies, and a multi-carrier wide area network. The processing of payroll, benefits and other transactions is dependent upon this complex

Insperity 23 2018 Form 10-K

RISK FACTORS

infrastructure, some of which is provided by third-party vendors. Hardware or applications we develop or procure from third-party vendors may contain defects in design or other problems that could unexpectedly compromise the confidentiality, integrity or availability of data or our systems. Any delays or failures caused by network outages, software or hardware failures, or other data processing disruptions, could result in our inability to timely process transactions. If such failures cause us to not meet client service expectations, we may lose existing clients and may have difficulty attracting new clients.

In connection with our HR services offerings, we collect, use, transmit and store large amounts of personal and business information about our WSEEs and clients, including payroll information, personal and business financial data, social security numbers, bank account numbers, tax information and other sensitive personal and business information. Attacks on information technology systems continue to grow in frequency and sophistication, and we and our third-party vendors are targeted by unauthorized parties using malicious tactics, code and viruses. Because the techniques used to obtain unauthorized access and disable or sabotage systems change frequently and may be difficult to detect for long periods of time, we and our third-party vendors may be unable to anticipate these techniques or implement adequate preventive measures. As these threats continue to evolve, we may be required to invest significant additional resources to modify and enhance our information security and controls or to investigate and remediate any security vulnerabilities. While our technology infrastructure is designed to safeguard and protect personal and business information, we do not have the ability to monitor the implementation of similar safeguards by our vendors, clients or WSEEs.

Any cyber-attack, unauthorized intrusion, malicious software infiltration, network disruption, corruption of data, or theft of private or other sensitive information, or inadvertent acts by our own employees, could result in the disclosure or misuse of confidential or proprietary information, and could have a material adverse effect on our business operations or that of our clients, result in liability or regulatory sanction, or cause a loss of confidence in our ability to serve clients. The impact of a data security incident could have a material adverse effect on our business, results of operations and financial condition.

We are also subject to various federal and state laws, rules and regulations relating to the collection, use, transmission and security and privacy of personal and business information. Most states and the District of Columbia have enacted notification rules that may require notification to regulators, clients or employees in the event of a privacy breach. In addition, new laws and regulations governing data privacy and the unauthorized disclosure of confidential information pose increasingly complex compliance challenges and potentially elevate our costs. It is possible that these federal and states laws may be interpreted and applied in a manner that is inconsistent with our data practices. If so, in addition to the possibility of fines, this could result in an order requiring that we change our data practices, which could have a material adverse effect on our business. Complying with these various laws could cause us to incur substantial costs or require us to change our business practices in a manner adverse to our business. The future enactment of more restrictive laws, rules or regulations could have a material adverse impact on us through increased costs or restrictions on our businesses and noncompliance could result in regulatory penalties and significant liability. Additionally, any failure by us to comply with these laws and regulations, including as a result of a security or privacy breach, could result in significant penalties and liabilities for us.

The failure of our insurance carriers or financial institutions could have a material adverse effect on us.

As part of our PEO HR Outsourcing solutions, we contract with various insurance carriers to provide insurance coverage including health insurance, workers’ compensation insurance and employment practices liability insurance. In addition, we obtain insurance coverage for various commercial risks in our business such as property insurance, errors and omissions insurance, cyber liability insurance, general liability insurance, fiduciary liability insurance, automobile liability insurance, and directors’ and officers’ liability insurance. The failure of any insurance carrier providing such coverage could leave us exposed to uninsured risk and could have a material adverse effect on our business.

In conjunction with providing services to clients, we rely on financial institutions to electronically transfer funds for the collection of our comprehensive service fee as well as the payment of wages and associated payroll tax withholdings. Failure by these financial institutions, for any reason, to deliver their services in a timely manner could result in material interruptions to our operations, impact client relations, and result in significant penalties or liabilities to us.

Insperity 24 2018 Form 10-K

RISK FACTORS

New and higher federal, state and local taxes could have a material adverse impact on our financial condition and results of operations.

In times of economic slowdowns, states and municipalities in which we operate may experience reductions in tax revenues and corresponding budget deficits. In response to budget shortfalls, many states and municipalities have in the past and may in the future increase or enact new taxes on businesses operating within their tax jurisdiction, including business activity taxes and income taxes. In addition, federal, state and local taxing agencies may increase their audit activity in an effort to identify additional tax revenues. New tax assessments on our operations could result in increased costs. Our ability to adjust our service fees and incorporate additional tax assessments into our billing system could be limited. As a result, such higher taxes could have a material adverse impact on our financial condition or results of operations.

Failure to integrate or realize the expected return on our acquisitions and investments could have a material adverse impact on our financial condition or results of operations.

We have adopted a strategy to market and sell additional products and services within and outside of traditional PEO HR Outsourcing solutions. As part of this strategy, periodically we make strategic long-term decisions to invest in and/or acquire new companies, business units or assets. Acquiring new businesses involves a number of risks such as over-valuation of the acquired companies, entering markets or businesses in which we have no prior experience, integrating the technology, operations, and personnel, diversion of management’s attention from other business concerns and litigation resulting from the activities of the acquired company. The occurrence of one or more of these events could result in the loss of existing or prospective clients or employees, not achieving anticipated revenues or profitability, or impairment of acquired assets. Such developments could have a material impact to our financial condition, results of operations and future growth rates. Based on market conditions or changes in operating plans, the fair value of our other acquired businesses could decline, requiring us to record impairment charges for all or portions of the investments.

Our business could be disrupted as a result of actions of certain stockholders.

If any of our stockholders commence a proxy contest, advocate for change, make public statements critical of our performance or business, or engage in other similar activities, then our business could be adversely affected because we may have difficulty attracting and retaining clients due to perceived uncertainties as to our future direction and negative public statements about our business; responding to proxy contests and other similar actions by stockholders is likely to result in us incurring substantial additional costs and significantly divert the attention of management and our employees; and, if individuals are elected to our Board with a specific agenda, the execution of our strategic plan may be disrupted or a new strategic plan altogether may be implemented, which could have a material adverse impact on our business, financial condition or results of operations. Further, any of these matters or any such actions by stockholders may impact and result in volatility of the price of our common stock.

Insperity 25 2018 Form 10-K

OTHER INFORMATION

Item 1B.  Unresolved Staff Comments.

None.

Insperity 26 2018 Form 10-K

PROPERTIES

Item 2.  Properties.

We believe our current real estate and facilities are adequate for the purposes for which they are intended and provide for further expansion to accommodate our long-term growth and expansion goals. We believe that short-term leased facilities are readily available if needed to accommodate near-term needs if they arise. We will continue to evaluate the need for additional facilities based on the extent of our product and service offerings, the rate of client growth, the geographic distribution of our client base and our long-term service delivery requirements.

Corporate Facilities

Our corporate headquarters is located in Kingwood, Texas, in a campus-style facility. This 33-acre company-owned office campus includes 430,000 square feet of office space and approximately 9 acres of undeveloped land for future expansion. Development and support operations are located in the Kingwood facility. In February 2019, we executed a contract to construct a 270,000 square foot office facility to be located on our corporate campus. Please read Item 9B. “Other Information” for additional information.

We have hosting facilities, totaling approximately 2,000 square feet, located at two separate leased facilities. The hosting facilities house the majority of our business applications, telecommunications equipment and network equipment. The facilities, located in Bryan, Texas and The Woodlands, Texas, are under lease until 2024 and 2022, respectively.

Service Centers

We currently have four regional service centers located in Atlanta, Dallas, Houston and Los Angeles.

The Atlanta service center, which currently services approximately 34% of our worksite employee base, is located in a 40,500 square foot facility under lease until 2023.

The Dallas service center, which currently services approximately 23% of our worksite employee base, is located in a 42,500 square foot facility under lease until 2023. In addition to the service center operations, the facility also contains sales operations.

The Houston service center, which currently services approximately 21% of our worksite employee base, is located on our corporate campus.

The Los Angeles service center, which currently services approximately 22% of our worksite employee base, is located in a 39,000 square foot facility under lease until 2029.

Sales and Service Offices

As of December 31, 2018, we had sales and service personnel in 59 facilities located in 33 sales markets throughout the United States. All of the facilities are leased and some are shared by multiple sales offices and/or client service personnel. As of December 31, 2018, we had 67 sales offices in these 33 markets. To take advantage of economic efficiencies, multiple sales offices may share a physical location. Each sales office is typically staffed by six to eight BPAs, a district sales manager and an office administrator. In addition, we have placed certain client service personnel in a majority of our sales markets to provide high-quality, localized service to our clients in those major markets. We expect to continue placing client service personnel in sales markets as a critical mass of clients is attained in each market.

Insperity 27 2018 Form 10-K

LEGAL PROCEEDINGS

Item 3.  Legal Proceedings.

We are not a party to any material pending legal proceedings other than ordinary routine litigation incidental to our business that we believe would not have a material adverse effect on our financial condition or results of operations, except as discussed in Note 12 to the Consolidated Financial Statements, “Commitments and Contingencies,” which is incorporated herein by reference.

Insperity 28 2018 Form 10-K

EXECUTIVE OFFICERS

Item S-K 401 (b).  Executive Officers of the Registrant.

The following table sets forth the names, ages (as of February 4, 2019) and positions of Insperity’s executive officers:

Name	Age	Position
Paul J. Sarvadi	62	Chairman of the Board and Chief Executive Officer
A. Steve Arizpe	61	Executive Vice President of Client Services and Chief Operating Officer
Jay E. Mincks	65	Executive Vice President of Sales and Marketing
Douglas S. Sharp	57	Senior Vice President of Finance, Chief Financial Officer and Treasurer
Daniel D. Herink	52	Senior Vice President of Legal, General Counsel and Secretary
James D. Allison	50	Senior Vice President of Gross Profit Operations

Paul J. Sarvadi has served as Chairman of the Board and Chief Executive Officer since August 2003. Mr. Sarvadi co-founded Insperity in 1986 and served as Vice President and Treasurer of Insperity from its inception in 1986 through April 1987, as Vice President from April 1987 through 1989 and as President and Chief Executive Officer from 1989 to August 2003. Prior to founding Insperity, Mr. Sarvadi started and operated several small businesses. Mr. Sarvadi has served as President of NAPEO and was a member of its Board of Directors for five years. Mr. Sarvadi was selected as the 2001 National Ernst & Young Entrepreneur Of The Year^® for service industries. In 2004, he received the Conn Family Distinguished New Venture Leader Award from Mays Business School at Texas A&M University. In 2007, he was inducted into the Texas Business Hall of Fame.

A. Steve Arizpe has served as Executive Vice President of Client Services and Chief Operating Officer since August 2003. He joined Insperity in 1989 and has served in a variety of roles, including Houston Sales Manager, Regional Sales Manager and Vice President of Sales. Prior to joining Insperity, Mr. Arizpe served in sales and sales management roles for NCR Corporation and Clarke-American. He has also served as a director of the Texas Chapter of NAPEO. Mr. Arizpe graduated from Texas A&M University in 1979, earning his degree in Business Management.

Jay E. Mincks has served as Executive Vice President of Sales and Marketing since January 1999. Mr. Mincks served as Vice President of Sales and Marketing from February 1997 through January 1999. He joined Insperity in 1990 and has served in a variety of other roles, including Houston Sales Manager and Regional Sales Manager for the Western United States. Prior to joining Insperity, Mr. Mincks served in a variety of positions, including management positions, in the sales and sales training fields with various large companies. He holds a business degree from the University of Houston.

Douglas S. Sharp has served as Senior Vice President of Finance, Chief Financial Officer and Treasurer since May 2008. He served as Vice President of Finance, Chief Financial Officer and Treasurer from August 2003 until May 2008. Mr. Sharp joined Insperity in January 2000 as Vice President of Finance and Controller. From July 1994 until he joined Insperity, he served as Chief Financial Officer for Rimkus Consulting Group, Inc. Prior to that, he served as Controller for a small publicly held company; as Controller for a software company; and as an Audit Manager for Ernst & Young LLP. Mr. Sharp has served as a member of the Accounting Practices Committee of NAPEO. Mr. Sharp is also a certified public accountant.

Daniel D. Herink has served as Senior Vice President of Legal, General Counsel and Secretary since May 2008. Mr. Herink joined Insperity in 2000 as Assistant General Counsel and was promoted to Associate General Counsel in 2002. He was promoted and elected to Vice President of Legal, General Counsel and Secretary in May 2007. Mr. Herink previously served as an attorney at Rodriguez, Colvin & Chaney, L.L.P. and McGinnis, Lochridge & Kilgore, L.L.P. He earned his Bachelor of Science degree in business administration from the University of Nebraska and a Doctorate of Jurisprudence from The University of Texas School of Law, where he was a member of the Texas Law Review and The Order of the Coif. Mr. Herink is also a certified public accountant.

James D. Allison has served as Senior Vice President of Gross Profit Operations since May 2018. Mr. Allison joined Insperity in 1997 and has held positions of increased responsibility, including Manager of Financial Reporting, Director of Accounting, Managing Director of Planning and Analysis, Managing Director of Finance, and Senior Vice President of Pricing and Cost Analysis. Mr. Allison has served on the Accounting Practices Committee of NAPEO and, prior to joining Insperity, he worked in the audit practice of Ernst & Young LLP. Mr. Allison earned his Bachelor of Business Administration and Master in Professional Accounting degrees from the University of Texas and is a certified public accountant.

Insperity 29 2018 Form 10-K

STOCK ACTIVITIES

PART II

Item 5.  Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

Common Stock

Our common stock is traded on the New York Stock Exchange under the symbol “NSP.” As of February 4, 2019, there were 411 holders of record of our common stock. This number does not include stockholders for whom shares were held in “nominee” or “street name.”

Dividend Policy

The payment of dividends is made at the discretion of our Board and depends upon our operating results, financial condition, capital requirements, general business conditions and such other factors as our Board deems relevant.

Issuer Purchases of Equity Securities

The following table provides information about our purchases of Insperity common stock during the three months ended December 31, 2018:

Period	Total Number of Shares Purchased(1)(2)	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Program(1)	Maximum Number of Shares that may yet be Purchased under the Program(1)
10/01/2018 – 10/31/2018	186,000	$	107.06	186,000	2,411,564
11/01/2018 – 11/30/2018	394,000	100.63		394,000	2,017,564
12/01/2018 – 12/31/2018	406,458	92.33		406,409	1,611,155
Total	986,458	$	98.42	986,409

__________________________________

⁽¹⁾  Our Board has approved a program to repurchase shares of our outstanding common stock. During the three months ended December 31, 2018, 986,409 shares were repurchased under the program. As of December 31, 2018, we were authorized to repurchase an additional 1,611,155 shares under the program. Unless terminated earlier by resolution of the Board, the repurchase program will expire when we have repurchased all the shares authorized for repurchase under the repurchase program.

⁽²⁾  During the three months ended December 31, 2018, 49 shares of restricted stock were withheld to satisfy tax-withholding obligations arising in conjunction with the vesting of restricted stock. The required withholding is calculated using the closing sales price reported by the New York Stock Exchange on the date prior to the applicable vesting date. These shares are not subject to the repurchase program described above.

Insperity 30 2018 Form 10-K

STOCK ACTIVITIES

Performance Graph

The following graph compares our cumulative total stockholder return since December 31, 2013, with the S&P Smallcap 600 Index, the S&P Midcap 400 Index and the S&P 1500 Composite Human Resources and Employment Services Index. The graph assumes that the value of the investment in our common stock and each index (including reinvestment of dividends) was $100 on December 31, 2013.

COMPARISON OF 5 YEAR CUMULATIVE TOTAL RETURN*

Among Insperity, Inc., the S&P Smallcap 600 Index, the S&P Midcap 400 Index,

and S&P 1500 Composite Human Resource and Employment Services Index

*$100 invested on 12/31/13 in Insperity stock or in the specified index, including reinvestment of dividends.
Fiscal year ending December 31.

Copyright© 2019 Standard & Poor's, a division of S&P Global. All rights reserved.

	12/13	12/14	12/15	12/16	12/17	12/18
Insperity, Inc.	100.00	102.09	147.64	220.80	367.89	604.10
S&P Smallcap 600	100.00	105.76	103.67	131.20	148.56	135.96
S&P Midcap 400	100.00	109.77	107.38	129.65	150.71	134.01
S&P 1500 Composite Human Resource and Employment Services	100.00	104.57	108.13	119.90	153.45	129.80

This graph shall not be deemed “filed” for purposes of Section 18 of the Securities and Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933 or the Exchange Act, regardless of any general incorporation language in such filing.

Insperity 31 2018 Form 10-K

SELECTED FINANCIAL DATA

Item 6.  Selected Financial Data.

The selected consolidated financial data set forth below should be read in conjunction with the Consolidated Financial Statements and accompanying Notes and Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

(in thousands, except per share and statistical data)	Year Ended December 31,
	2018		2017			2016			2015			2014
Income Statement Data:
Revenues(1)	$	3,828,549	$	3,300,223		$	2,941,347		$	2,603,614		$	2,357,788
Gross profit	681,909		572,731			491,610			437,867			403,805
Operating income	179,036		129,941			106,306			65,699		(2)	47,474		(3)
Net income	135,413		84,402			65,991			39,390			28,004
Diluted EPS	3.22		2.01		(4)	1.54		(4)	0.79		(4)	0.53		(4)(5)
Non-GAAP Financial Measures(6):
Adjusted net income	$	157,536	$	103,005		$	76,718		$	54,519		$	36,734
Adjusted EPS	3.75		2.45		(4)	1.79		(4)	1.10		(4)	0.72		(4)
Adjusted EBITDA	239,601		177,681			141,183			110,014			84,124
Balance Sheet Data:
Working capital	$	94,204	$	54,206		$	39,364		$	54,337		$	66,742
Total assets	1,191,816		1,063,695			907,174			784,912			792,595
Total debt	144,400		104,400			104,400			—			—
Total stockholders’ equity	77,676		66,321			60,525			172,455			204,096
Cash dividends per share	0.80		1.58		(4)(7)	0.49		(4)	0.43		(4)	1.37		(4)(7)
Average WSEEs paid	209,123		182,696			165,850			145,830			130,718
Statistical Data (per WSEE per month):
Revenues(8)	$	1,526	$	1,505		$	1,478		$	1,488		$	1,503
Gross profit	272		261			247			250			257
Operating income	71		59			53			38			30
Adjusted EBITDA(6)	95		81			71			63			54

____________________________________

⁽¹⁾  Revenues are comprised of gross billings less worksite employee (“WSEE”) payroll costs as follows:

	Year Ended December 31,
(in thousands)	2018		2017		2016		2015		2014
Gross billings	$	23,830,731	$	20,173,812	$	17,932,857	$	15,806,178	$	14,186,921
Less: WSEE payroll cost	20,002,182		16,873,589		14,991,510		13,202,564		11,829,133
Revenues	$	3,828,549	$	3,300,223	$	2,941,347	$	2,603,614	$	2,357,788

⁽²⁾  Includes non-cash impairment and other charges in the first and second quarters of 2015 of $9.8 million and $1.3 million, respectively, partially offset by a reduction of $0.6 million in the fourth quarter of 2015.

⁽³⁾  Includes a non-cash impairment charge in the second quarter of 2014 of $2.5 million. Also includes a non-cash charge in 2014 of $1.2 million.

⁽⁴⁾  Adjusted to reflect the two-for-one split of our common stock effected on December 18, 2017 as a stock dividend.

⁽⁵⁾  Includes the impact of dividends exceeding earnings under the two-class method, resulting in a $0.03 earnings per share decrease in 2014.

Insperity 32 2018 Form 10-K

SELECTED FINANCIAL DATA

⁽⁶⁾  These are non-GAAP measures used by management to analyze Insperity’s performance. Please read Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Non-GAAP Financial Measures” for a reconciliation of the non-GAAP financial measures to the most directly comparable financial measures calculated and presented in accordance with GAAP.

⁽⁷⁾  Includes a $1.00 per share special dividend paid in both the fourth quarters of 2017 and 2014.

⁽⁸⁾  Revenues per WSEE per month are comprised of gross billings per WSEE per month less WSEE payroll costs per WSEE per month as follows:

	Year Ended December 31,
(per WSEE per month)	2018		2017		2016		2015		2014
Gross billings	$	9,496	$	9,202	$	9,011	$	9,032	$	9,044
Less: WSEE payroll cost	7,970		7,697		7,533		7,544		7,541
Revenues	$	1,526	$	1,505	$	1,478	$	1,488	$	1,503

Insperity 33 2018 Form 10-K

MANAGEMENT’S DISCUSSION AND ANALYSIS OF

FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Item 7.   Management’s Discussion and Analysis of Financial Condition and Results of Operations.

You should read the following discussion in conjunction with our Consolidated Financial Statements and related Notes included elsewhere in this annual report. Historical results are not necessarily indicative of trends in operating results for any future period.

The statements contained in this annual report that are not historical facts are forward-looking statements that involve a number of risks and uncertainties. The actual results of the future events described in such forward-looking statements in this annual report could differ materially from those stated in such forward-looking statements. Among the factors that could cause actual results to differ materially are the risks and uncertainties discussed in Item 1A. Risk Factors and the uncertainties set forth from time to time in our other public reports and filings and public statements.

Executive Summary

Overview

Our long-term strategy is to provide the best small and medium-sized businesses in the United States with our specialized human resources service offering and to leverage our buying power and expertise to provide additional valuable services to clients. Our most comprehensive HR services offerings are provided through our Workforce Optimization^® and Workforce Synchronization^TM solutions (together, our PEO HR Outsourcing solutions), which encompass a broad range of human resources functions, including payroll and employment administration, employee benefits, workers’ compensation, government compliance, performance management and training and development services. Our overall operating results can be measured in terms of revenues, gross profit or adjusted EBITDA per WSEE per month. We often use the average number of WSEEs paid during a period as our unit of measurement in analyzing and discussing our results of operations.

In addition to our PEO HR Outsourcing solutions, we offer a comprehensive traditional payroll and human capital management solution, known as Workforce Acceleration. We also offer a number of other business performance solutions, including Time and Attendance, Performance Management, Organizational Planning, Recruiting Services, Employment Screening, Expense Management, Retirement Services, and Insurance Services, many of which are primarily offered via cloud-based delivery models. These other products or services are offered separately or with our other solutions.

2018 Highlights

Our results for 2018 reflect the impact of continued worksite employee (“WSEE”) growth and effective management of gross profit and operating costs contributing to our significant earnings growth. We ended 2018 averaging 221,809 paid WSEEs, which represents a 17.0%increase over fourth quarter 2017. We expect the average number of paid WSEEs per month to be between 224,000 and 226,000 in the first quarter 2019.

2018 Compared to 2017

• Average number of WSEEs paid per month increased14.5% to 209,123, driving a 19.1% gross profit increase

• Net income and diluted earnings per share (“Diluted EPS”) increased 60.4% and 60.2% to $135.4 million and $3.22, respectively

• Adjusted EBITDA increased34.8% to $239.6 million

• Adjusted net income increased 52.9% to $157.5 million

• Adjusted EPS increased53.1% to $3.75

• Approximately 24.6% and 23.6% of our average paid WSEEs were in our middle market sector for the years ended December 31, 2018 and 2017, respectively, which is generally defined as companies with 150 to 5,000 WSEEs.

• Our average gross profit per worksite employee per month was $272 in 2018 and $261 in 2017.

Insperity 34 2018 Form 10-K

MANAGEMENT’S DISCUSSION AND ANALYSIS OF

FINANCIAL CONDITION AND RESULTS OF OPERATIONS

• Operating expenses increased13.6% in 2018 to $502.9 million. On a per worksite employee per month basis, operating expenses decreased from $202 in 2017 to $201 in 2018.

• Adjusted operating expenses increased12.0% in 2018 to $493.6 million. On a per worksite employee per month basis, adjusted operating expenses decreased from $201 in 2017 to $197 in 2018.

• Net income in 2018 was $135.4 million, a 60.4%increase compared to 2017.

• Our adjusted EBITDA per worksite employee per month increased17.3% from $81 in 2017 to $95 in 2018.

• We ended 2018 with working capital of $94.2 million.

• During 2018, we paid $33.4 million in dividends and repurchased 1.2 million shares of our common stock at a cost of $113.3 million.

Please read “Non-GAAP Financial Measures” for a reconciliation of adjusted EBITDA, adjusted net income, adjusted EPS and adjusted operating expenses to their most directly comparable financial measures calculated and presented in accordance with GAAP.

Revenues

We account for our revenues in accordance with Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers (Topic 606). Our PEO HR Outsourcing solutions gross billings to clients include the payroll cost of each worksite employee at the client location and a markup computed as a percentage of each worksite employee’s payroll cost. We invoice the gross billings concurrently with each periodic payroll of our WSEEs. Revenues, which exclude the payroll cost component of gross billings, and therefore, consist solely of the markup, are recognized ratably over the payroll period as WSEEs perform their service at the client worksite. This markup includes pricing components associated with our estimates of payroll taxes, benefits and workers’ compensation costs, plus a separate component related to our HR services. We include revenues that have been recognized but not invoiced in unbilled accounts receivable on our Consolidated Balance Sheets.

Our revenues are primarily dependent on the number of clients enrolled, the resulting number of WSEEs paid each period and the number of WSEEs enrolled in our benefit plans. Because our total markup is computed as a percentage of payroll cost, certain revenues are also affected by the payroll cost of WSEEs, which may fluctuate based on the composition of the worksite employee base, inflationary effects on wage levels and differences in the local economies of our markets.

Direct Costs

The primary direct costs associated with revenue-generating activities for our PEO HR Outsourcing solutions are:

• employment-related taxes (“payroll taxes”)

• costs of employee benefit plans

• workers’ compensation costs

Payroll taxes consist of the employer’s portion of Social Security and Medicare taxes under FICA, federal unemployment taxes and state unemployment taxes. Payroll taxes are generally paid as a percentage of payroll cost. The federal unemployment tax rates are defined by federal regulations. State unemployment tax rates are subject to claim histories and vary from state to state.

Employee benefits costs are comprised primarily of health insurance premiums and claims costs (including dental and pharmacy costs), but also include costs of other employee benefits such as life insurance, vision care, disability insurance, education assistance, adoption assistance, a flexible spending account program and a work-life program.

Workers’ compensation costs include administrative and risk charges paid to the insurance carrier, and claims costs, which are driven primarily by the frequency and severity of claims.

Insperity 35 2018 Form 10-K

MANAGEMENT’S DISCUSSION AND ANALYSIS OF

FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Gross Profit

Our gross profit per worksite employee is primarily determined by our ability to accurately estimate and control direct costs and our ability to incorporate changes in these costs into the gross billings charged to PEO HR Outsourcing solutions clients, which are subject to pricing arrangements that are typically renewed annually. We use gross profit per worksite employee per month as our principal measurement of relative performance at the gross profit level.

Operating Expenses

• Salaries, wages and payroll taxes – Salaries, wages and payroll taxes (“Salaries”) are primarily a function of the number of corporate employees, their associated average pay and any additional incentive compensation. Our corporate employees include client services, sales and marketing, benefits, legal, finance, information technology, administrative support personnel and those associated with our other products and services.

• Stock-based compensation – Our stock-based compensation relates to the recognition of non-cash compensation expense over the vesting period of restricted stock and long-term incentive plan awards.

• Commissions – Commissions expense consists primarily of amounts paid to sales managers and BPAs as well as channel referral fees. Commissions are based on new accounts sold and a percentage of revenue generated by such personnel.

• Advertising – Advertising expense primarily consists of media advertising and other business promotions in our current and anticipated sales markets, including the Insperity Invitational^™ presented by UnitedHealthcare^® sponsorship.

• General and administrative expenses – Our general and administrative expenses primarily include:

• rent expenses related to our service centers and sales offices

• outside professional service fees related to legal, consulting, and accounting services

• administrative costs, such as postage, printing, and supplies

• employee travel and training expenses

• technology expenses

• facility repairs and maintenance costs

• Depreciation and amortization – Depreciation and amortization expense is primarily a function of our capital investments in corporate facilities, service centers, sales offices, software development, technology infrastructure and that associated with our acquisitions.

• Impairment charges and other – Impairment charges and other consist of non-cash expense associated with the decline in fair value of long-lived and intangible assets, including goodwill. Please read Note 1 “Accounting Policies,” to the Consolidated Financial Statements for additional information.

Other Income (Expense)

Other income (expense) includes interest charges incurred in connection with borrowings under our credit facility and interest income earned on our cash, cash equivalents and marketable securities. Please read “—Liquidity and Capital Resources” for additional information.

Income Taxes

On December 22, 2017, the Tax Cuts and Jobs Act (the “2017 Tax Reform Act”) was signed into law. The 2017 Tax Reform Act significantly changes U.S. corporate income tax laws by, among other things, reducing the U.S. corporate income tax rate from 35% to 21% beginning in 2018. As a result, we remeasured our deferred tax assets at the new lower corporate income tax rate and recorded a non-cash tax charge of $2.5 million in 2017. Our provision for income taxes typically differs from the U.S. statutory rate of 21%, due primarily to state income taxes, non-deductible expenses and

Insperity 36 2018 Form 10-K

MANAGEMENT’S DISCUSSION AND ANALYSIS OF

FINANCIAL CONDITION AND RESULTS OF OPERATIONS

various tax credits. Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities used for financial reporting purposes and the amounts used for income tax purposes. Significant items resulting in deferred income taxes include prepaid assets, accruals for workers’ compensation expenses, stock-based compensation, software development costs, accrued incentive compensation and depreciation. Changes in these items are reflected in our financial statements through a deferred income tax provision. Please read Note 7 to the Consolidated Financial statements, “Income Taxes,” for additional information.

Critical Accounting Policies and Estimates

The discussion and analysis of our financial condition and results of operations is based upon our Consolidated Financial Statements, which have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”). The preparation of these financial statements requires our management to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities. On an ongoing basis, we evaluate these estimates, including those related to health and workers’ compensation insurance claims experience, client bad debts, income taxes, property and equipment, goodwill and other intangibles, and contingent liabilities. We base these estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates.

We believe the following accounting policies are critical and/or require significant judgments and estimates used in the preparation of our Consolidated Financial Statements:

• Benefits costs – We provide group health insurance coverage to our WSEEs through a national network of carriers including United, UnitedHealthcare of California, Kaiser Permanente, Blue Shield of California, HMSA BlueCross BlueShield of Hawaii and Tufts, all of which provide fully insured policies or service contracts.

The health insurance contract with United provides the majority of our health insurance coverage. As a result of certain contractual terms, we have accounted for this plan since its inception using a partially self-funded insurance accounting model. Accordingly, we record the costs of the United plan, including an estimate of the incurred claims, taxes and administrative fees (collectively the “Plan Costs”), as benefits expense in the Consolidated Statements of Operations. The estimated incurred claims are based upon: (1) the level of claims processed during the quarter; (2) estimated completion rates based upon recent claim development patterns under the plan; and (3) the number of participants in the plan, including both active and COBRA enrollees. Each reporting period, changes in the estimated ultimate costs resulting from claim trends, plan design and migration, participant demographics and other factors are incorporated into the benefits costs.

Additionally, since the plan’s inception, under the terms of the contract, United establishes cash funding rates 90 days in advance of the beginning of a reporting quarter. If the Plan Costs for a reporting quarter are greater than the premiums paid and owed to United, a deficit in the plan would be incurred and we would accrue a liability for the excess costs on our Consolidated Balance Sheets. On the other hand, if the Plan Costs for the reporting quarter are less than the premiums paid and owed to United, a surplus in the plan would be incurred and we would record an asset for the excess premiums on our Consolidated Balance Sheets. The terms of the arrangement with United require us to maintain an accumulated cash surplus in the plan of $9.0 million, which is reported as long-term prepaid insurance. As of December 31, 2018, Plan Costs were more than the premiums paid and owed to United by $6.3 million. As this amount is less than the agreed-upon $9.0 million surplus maintenance level, the $15.3 million difference is included in accrued health insurance costs, a current liability, on our Consolidated Balance Sheets. In addition, the premiums owed to United at December 31, 2018, were $15.2 million, which is also included in accrued health insurance costs, a current liability, on our Consolidated Balance Sheets.

We believe that recent claims activity is representative of incurred and paid trends during the reporting period. The estimated completion rate and annual trend used to compute incurred but not reported claims involves a significant level of judgment. Accordingly, an increase (or decrease) in the completion rate or annual trend used to estimate the incurred claims would result in an increase (or decrease) in benefits costs and net income would decrease (or increase) accordingly.

Insperity 37 2018 Form 10-K

MANAGEMENT’S DISCUSSION AND ANALYSIS OF

FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following table illustrates the sensitivity of changes in the completion rate and annual trend on our estimate of total benefit costs of $1.7 billion in 2018:

Change in Completion Rate and Annual Trend	Change in Benefits Costs (in thousands)			Change in Net Income (in thousands)
(2.5)%	$	(21,170	)	$	15,729
(1.0)%	(8,468		)	6,292
1.0%	8,468			(6,292		)
2.5%	21,170			(15,729		)

• Workers’ compensation costs – Since 2007, our workers’ compensation coverage has been provided through our arrangement with Chubb. The Chubb Program is fully insured in that Chubb has the responsibility to pay all claims incurred under the policy regardless of whether we satisfy our responsibilities. Under the Chubb Program, we have financial responsibility to Chubb for the first $1 million layer of claims per occurrence and, for claims over $1 million, up to a maximum aggregate amount of $6 million per policy year for claims that exceed $1 million.

Because we bear the financial responsibility for claims up to the levels noted above, such claims, which are the primary component of our workers’ compensation costs, are recorded in the period incurred. Workers’ compensation insurance includes ongoing health care and indemnity coverage whereby claims are paid over numerous years following the date of injury. Accordingly, the accrual of related incurred costs in each reporting period includes estimates, which take into account the ongoing development of claims and therefore requires a significant level of judgment.

We utilize a third-party actuary to estimate our loss development rate, which is primarily based upon the nature of WSEEs’ job responsibilities, the location of WSEEs, the historical frequency and severity of workers’ compensation claims, and an estimate of future cost trends. Each reporting period, changes in the actuarial assumptions resulting from changes in actual claims experience and other trends are incorporated into our workers’ compensation claims cost estimates. During the years ended December 31, 2018 and 2017, we reduced accrued workers’ compensation costs by $18.8 million and $16.3 million, respectively, for changes in estimated losses related to prior reporting periods. Workers’ compensation cost estimates are discounted to present value at a rate based upon the U.S. Treasury rates that correspond with the weighted average estimated claim payout period (the average discount rate was 2.6% in 2018 and 1.6% in 2017) and are accreted over the estimated claim payment period and included as a component of direct costs in our Consolidated Statements of Operations.

Our claim trends could be greater than or less than our prior estimates, in which case we would revise our claims estimates and record an adjustment to workers’ compensation costs in the period such determination is made. If we were to experience any significant changes in actuarial assumptions, our loss development rates could increase (or decrease), which would result in an increase (or decrease) in workers’ compensation costs and a resulting decrease (or increase) in net income reported in our Consolidated Statements of Operations.

The following table illustrates the sensitivity of changes in the loss development rate on our estimate of workers’ compensation costs totaling $86.0 million in 2018:

Change in Loss Development Rate	Change in Workers’ Compensation Costs (in thousands)			Change in Net Income (in thousands)
(5.0)%	$	(4,044	)	$	3,005
(2.5)%	(2,022		)	1,502
2.5%	2,022			(1,502		)
5.0%	4,044			(3,005		)

At the beginning of each policy period, the workers’ compensation insurance carrier establishes monthly funding requirements comprised of premium costs and funds to be set aside for payment of future claims (“claim funds”). The level of claim funds is primarily based upon anticipated worksite employee payroll levels and expected

Insperity 38 2018 Form 10-K

MANAGEMENT’S DISCUSSION AND ANALYSIS OF

FINANCIAL CONDITION AND RESULTS OF OPERATIONS

workers’ compensation loss rates, as determined by the insurance carrier. Monies funded into the program for incurred claims expected to be paid within one year are recorded as restricted cash, a short-term asset, while the remainder of claim funds are included in deposits, a long-term asset in our Consolidated Balance Sheets. In 2018, we received $19.4 million for the return of excess claim funds related to the workers’ compensation program, which decreased deposits. As of December 31, 2018, we had restricted cash of $42.2 million and deposits of $166.5 million. We have estimated and accrued $229.6 million in incurred workers’ compensation claim costs as of December 31, 2018. Our estimate of incurred claim costs expected to be paid within one year are recorded as accrued workers’ compensation costs and is included in short-term liabilities, while our estimate of incurred claim costs expected to be paid beyond one year is included in long-term liabilities on our Consolidated Balance Sheets.

• Contingent liabilities – We accrue and disclose contingent liabilities in our Consolidated Financial Statements in accordance with ASC 450-10, Contingencies. GAAP requires accrual of contingent liabilities that are considered probable to occur and that can be reasonably estimated. For contingent liabilities that are considered reasonably possible to occur, financial statement disclosure is required, including the range of possible loss if it can be reasonably determined. From time to time we disclose in our financial statements issues that we believe are reasonably possible to occur, although we cannot determine the range of possible loss in all cases. As issues develop, we evaluate the probability of future loss and the potential range of such losses. If such evaluation were to determine that a loss was probable and the loss could be reasonably estimated, we would be required to accrue our estimated loss, which would reduce net income in the period that such determination was made.

• Deferred taxes – We have recorded a valuation allowance to reduce our deferred tax assets to the amount that is more likely than not to be realized. While we have considered future taxable income and ongoing prudent and feasible tax planning strategies in assessing the need for the valuation allowance, our ability to realize our deferred tax assets could change from our current estimates. If we determine that we would be able to realize our deferred tax assets in the future in excess of the net recorded amount, an adjustment to reduce the valuation allowance would increase net income in the period that such determination is made. Likewise, should we determine that we will not be able to realize all or part of our net deferred tax assets in the future, an adjustment to increase the valuation allowance would reduce net income in the period such determination is made. In 2018, we finalized certain tax positions when we filed our 2017 federal tax return, and concluded no further adjustments were required to our net deferred tax asset balance of $8.8 million as of December 31, 2018 related to the remeasurement of our deferred tax assets under the 2017 Tax Reform Act.

• Allowance for doubtful accounts – We maintain an allowance for doubtful accounts for estimated losses resulting from the inability of our clients to pay their comprehensive service fees. We believe that the success of our business is heavily dependent on our ability to collect these comprehensive service fees for several reasons, including:

• the fact that we are at risk for the payment of our direct costs and worksite employee payroll costs regardless of whether our clients pay their comprehensive service fees

• the large volume and dollar amount of transactions we process

• the periodic and recurring nature of payroll, upon which the comprehensive service fees are based

To mitigate this risk, we have established very tight credit policies. We generally require our PEO HR Outsourcing solutions clients to pay their comprehensive service fees no later than one day prior to the applicable payroll date. In addition, we generally maintain the right to terminate the CSA and associated WSEEs or to require prepayment, letters of credit or other collateral if a client’s financial position deteriorates or if the client does not pay the comprehensive service fee. As a result of these efforts, losses related to client nonpayment have historically been low as a percentage of revenues. However, if our clients’ financial conditions were to deteriorate rapidly, resulting in nonpayment, our accounts receivable balances could grow and we could be required to provide for additional allowances, which would decrease net income in the period that such determination was made.

• Property and equipment – Our property and equipment relate primarily to our facilities and related improvements, furniture and fixtures, computer hardware and software and capitalized software development costs. These costs are depreciated or amortized over the estimated useful lives of the assets. If we determine that the useful lives of these assets will be shorter than we currently estimate, our depreciation and amortization expense could be accelerated, which would decrease net income in the periods of such a determination. In addition, we periodically evaluate these costs for impairment. If events or circumstances were to indicate that any of our long-lived assets might be impaired, we would assess recoverability based on the estimated undiscounted future cash flows to be

Insperity 39 2018 Form 10-K

MANAGEMENT’S DISCUSSION AND ANALYSIS OF

FINANCIAL CONDITION AND RESULTS OF OPERATIONS

generated from the applicable asset. In addition, we may record an impairment loss, which would reduce net income, to the extent that the carrying value of the asset exceeded the fair value of the asset. Fair value is generally determined using an estimate of discounted future net cash flows from operating activities or upon disposal of the asset. Please read Note 1 to the Consolidated Financial Statements, “Accounting Policies,” for additional information.

• Goodwill and other intangibles – Goodwill is tested for impairment on an annual basis and between annual tests in certain circumstances, and is written down when impaired. Purchased intangible assets other than goodwill are amortized over their useful lives unless these lives are determined to be indefinite. Our purchased intangible assets are carried at cost less accumulated amortization. Amortization is computed over the estimated useful lives of the respective assets, which ranges from three to 10 years. Please read Note 1 to the Consolidated Financial Statements, “Accounting Policies,” for additional information.

New Accounting Pronouncements

We believe that we have implemented the accounting pronouncements with a material impact on our financial statements and do not believe there are any new or pending pronouncements that will materially impact our financial position or results of operations.

In February 2016, the FASB issued ASU No. 2016-02, Leases. The new standard requires recognition of lease assets and lease liabilities for leases previously classified as operating leases. The guidance is effective for fiscal years beginning after December 15, 2018. We expect the lease commitments discussed in Note 11, to the Consolidated Financial Statements, “Leases” to appear on our Consolidated Balance Sheets in the form of a lease asset and a lease liability. Such amounts are based on the present value of such commitments using our incremental borrowing rate. We plan to utilize the transition package of practical expedients permitted within the new standard, which among other things, allows us to carryforward the historical lease classification. We do not plan to elect the practical expedient to use hindsight in determining the lease term and in assessing impairment of right-of-use assets.

Insperity 40 2018 Form 10-K

MANAGEMENT’S DISCUSSION AND ANALYSIS OF

FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Results of Operations

The following table summarized our key financial and statistical information related to our results of operations:

(in thousands, except per share and statistical data)	Year Ended December 31,									% Change
	2018		2017			2016				2018 v 2017		2017 v 2016
Financial data:
Revenues(1)	$	3,828,549	$	3,300,223		$	2,941,347			16.0	%	12.2	%
Gross profit	681,909		572,731			491,610				19.1	%	16.5	%
Operating expenses	502,873		442,790			385,304				13.6	%	14.9	%
Operating income	179,036		129,941			106,306				37.8	%	22.2	%
Other income (expense)	3,324		200			(1,129		)		—		—
Net income	135,413		84,402			65,991				60.4	%	27.9	%
Diluted EPS	3.22		2.01		(2)	1.54			(2)	60.2	%	30.5	%
Non-GAAP financial measures(3):
Adjusted net income	$	157,536	$	103,005		$	76,718			52.9	%	34.3	%
Adjusted EBITDA	239,601		177,681			141,183				34.8	%	25.9	%
Adjusted EPS	3.75		2.45		(2)	1.79			(2)	53.1	%	36.9	%
Average WSEEs paid	209,123		182,696			165,850				14.5	%	10.2	%
Statistical data (per WSEE per month):
Revenues(4)	$	1,526	$	1,505		$	1,478			1.4	%	1.8	%
Gross profit	272		261			247				4.2	%	5.7	%
Operating expenses	201		202			194				(0.5	)%	4.1	%
Operating income	71		59			53				20.3	%	11.3	%
Net income	54		38			33				42.1	%	15.2	%
Adjusted EBITDA(3)	95		81			71				17.3	%	14.1	%

___________________________________

⁽¹⁾Revenues are comprised of gross billings less worksite employee (“WSEE”) payroll costs as follows:

	Year ended December 31,
(in thousands)	2018		2017		2016
Gross billings	$	23,830,731	$	20,173,812	$	17,932,857
Less: WSEE payroll cost	20,002,182		16,873,589		14,991,510
Revenues	$	3,828,549	$	3,300,223	$	2,941,347

⁽²⁾  Adjusted to reflect the two-for-one split of our common stock effected on December 18, 2017 in the form of a stock dividend.

⁽³⁾  Please read “—Non-GAAP Financial Measures” for a reconciliation of the non-GAAP financial measures to their most directly comparable financial measures calculated and presented in accordance with GAAP.

⁽⁴⁾Revenues per WSEE per month are comprised of gross billings per WSEE per month less WSEE payroll costs per WSEE per month as follows:

	Year Ended December 31,
(per WSEE per month)	2018		2017		2016
Gross billings	$	9,496	$	9,202	$	9,011
Less: WSEE payroll cost	7,970		7,697		7,533
Revenues	$	1,526	$	1,505	$	1,478

Insperity 41 2018 Form 10-K

MANAGEMENT’S DISCUSSION AND ANALYSIS OF

FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Key Operating Metrics

We monitor certain key metrics to measure our performance, including:

• WSEEs

• Adjusted EBITDA

• Adjusted EPS

Our growth in the number of WSEEs paid is affected by three primary sources: new client sales, client retention and the net change in existing clients through WSEE new hires and layoffs.

• During 2018, the number of WSEEs paid from new client sales increased 27.0% over 2017 on a 16.2%increase in the average number of Business Performance Advisors (“BPAs”). In addition, the net change in existing clients and client retention improved compared to 2017.

• During 2017, the number of WSEEs paid from new client sales increased 10.1% over 2016 on an 11.7%increase in the average number of BPAs. In addition, the net change in existing clients and client retention declined compared to 2016.

Revenues

2018 Compared to 2017

Our revenues for 2018 were $3.8 billion, an increase of 16.0%, primarily due to the following:

• Average WSEEs paid increased14.5%

• Revenues per WSEE per month increased1.4%, or $21

2017 Compared to 2016

Insperity 42 2018 Form 10-K

MANAGEMENT’S DISCUSSION AND ANALYSIS OF

FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Our revenues for 2017 were $3.3 billion, an increase of 12.2%, primarily due to the following:

• Average WSEEs paid increased10.2%

• Revenues per WSEE per month increased1.8%, or $27

We provide our PEO HR Outsourcing solutions to small and medium-sized businesses in strategically selected markets throughout the United States. PEO HR Outsourcing solutions revenue distribution by region follows:

PEO HR Outsourcing Solutions Revenue by Region

(in thousands)

The percentage of total PEO HR Outsourcing solutions revenues in our significant markets include the following:

Significant Markets

Gross Profit

In determining the pricing of the markup component of our gross billings, we take into consideration our estimates of the costs directly associated with our WSEEs, including payroll taxes, benefits and workers’ compensation costs, plus an acceptable gross profit margin. As a result, our gross profit per WSEE and our operating results are significantly impacted by our ability to accurately estimate, control and manage our direct costs relative to the revenues derived from the markup component of our gross billings.

Insperity 43 2018 Form 10-K

MANAGEMENT’S DISCUSSION AND ANALYSIS OF

FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Our gross billings charged to our PEO Outsourcing solutions clients are subject to pricing arrangements that are typically renewed annually. We use gross profit per WSEE per month as our principal measurement of relative performance at the gross profit level.

2018 Compared to 2017

Our pricing objectives attempt to achieve a level of revenue per WSEE that matches or exceeds changes in primary direct costs and operating expenses. The net decrease in costs between 2018 and 2017 due to changes in cost estimates for benefits and workers compensation totaled $5.0 million as discussed below. The primary direct cost components changed as follows:

Benefits costs

• The cost of group health insurance and related employee benefits increased$6 per WSEE per month, or 2.2%, on a per covered employee basis.

• Changes in estimated claims run-off related to prior periods was a reduction of $1.3 million, or $1 per WSEE per month, in 2018 compared to an increase of $1.2 million, or $1 per worksite employee per month, in 2017.

• The percentage of WSEEs covered under our health insurance plan was 68.0% in 2018 and 68.8% in 2017.

Please read “—Critical Accounting Policies and Estimates—Benefits Costs” for a discussion of our accounting for health insurance costs.

Workers’ compensation costs

Our continued discipline around our client selection, safety and claims management contributed to the reduction in our cost per WSEE and, as a result, has allowed for claims within our policy periods to be closed out at amounts below our original costs estimates.

• Workers’ compensation costs increased6.2%, but decreased $3 on a per WSEE per month basis, in 2018 compared to 2017.

Insperity 44 2018 Form 10-K

MANAGEMENT’S DISCUSSION AND ANALYSIS OF

FINANCIAL CONDITION AND RESULTS OF OPERATIONS

• As a result of closing out claims incurred in prior periods at lower than expected costs, we recorded a reduction in workers’ compensation costs of $18.8 million, or 0.11% of non-bonus payroll costs, in 2018 compared to a reduction of $16.3 million, or 0.11% of non-bonus payroll costs, in 2017. The 2018 period costs include the impact of a 2.6% discount rate used to accrue workers’ compensation loss claims, compared to a 1.6% discount rate used in the 2017 period.

• As a percentage of non-bonus payroll cost, workers’ compensation costs in 2018 were 0.49% compared to 0.54% in 2017.

Please read “—Critical Accounting Policies and Estimates—Workers’ Compensation Costs” for a discussion of our accounting for workers’ compensation costs.

Payroll tax costs

• Payroll taxes increased15.8%, or $6 per WSEE per month, due primarily to an 18.5%increase in payroll costs offset by lower unemployment tax rates in 2018.

• Payroll taxes as a percentage of payroll cost were 6.7% in 2018 compared to 6.9% in 2017.

2017 Compared to 2016

The net decrease in costs between 2017 and 2016 due to changes in cost estimates for benefits and workers compensation totaled $9.3 million as discussed below. The primary direct cost components changed as follows:

Benefits costs

• The cost of group health insurance and related employee benefits increased$4 per WSEE per month, or 1.2%, on a per covered employee basis.

• Changes in estimated claims run-off related to prior periods was an increase of $1.2 million, or $1 per WSEE per month, in 2017 compared to $5.1 million, or $3 per worksite employee per month, in 2016.

• The percentage of WSEEs covered under our health insurance plan was 68.8% in 2017 and 69.2% in 2016.

Please read “—Critical Accounting Policies and Estimates—Benefits Costs” for a discussion of our accounting for health insurance costs.

Workers’ compensation costs

Our continued discipline around our client selection, safety and claims management contributed to the reduction in our cost per WSEE and, as a result, has allowed for claims within our policy periods to be closed out at amounts below our original costs estimates.

• Workers’ compensation costs increased2.2%, but decreased $3 on a per WSEE per month basis, in 2017 compared to 2016.

• As a result of closing out claims incurred in prior periods at lower than expected costs, we recorded a reduction in workers’ compensation costs of $16.3 million, or 0.11% of non-bonus payroll costs, in 2017 compared to $10.9 million, or 0.08% of non-bonus payroll costs, in 2016. The 2017 period costs include the impact of a 1.6% discount rate used to accrue workers’ compensation loss claims, compared to a 1.1% discount rate used in the 2016 period.

• As a percentage of non-bonus payroll cost, workers’ compensation costs in 2017 were 0.54% compared to 0.59% in 2016.

Please read “—Critical Accounting Policies and Estimates—Workers’ Compensation Costs” for a discussion of our accounting for workers’ compensation costs.

Payroll tax costs

Insperity 45 2018 Form 10-K

MANAGEMENT’S DISCUSSION AND ANALYSIS OF

FINANCIAL CONDITION AND RESULTS OF OPERATIONS

• Payroll taxes increased12.6% primarily due to a 12.6%increase in payroll costs, or $12 on a per WSEE per month basis.

• Payroll taxes as a percentage of payroll cost were 6.9% in 2017 compared to 6.8% in 2016.

Operating Expenses

2018 Compared to 2017

The following table presents certain information related to our operating expenses:

	Year Ended December 31,
	$						WSEE
(in thousands, except per WSEE)	2018		2017		% Change		2018		2017		% Change
Salaries	$	301,027	$	259,531	16.0	%	$	120	$	118	1.7	%
Stock-based compensation	20,425		24,345		(16.1	)%	8		11		(27.3	)%
Commissions	28,957		22,773		27.2	%	12		10		20.0	%
Advertising	18,554		16,686		11.2	%	7		8		(12.5	)%
General and administrative	111,068		101,273		9.7	%	45		46		(2.2	)%
Depreciation and amortization	22,842		18,182		25.6	%	9		9		—
Total operating expenses	$	502,873	$	442,790	13.6	%	$	201	$	202	(0.5	)%

Operating expenses for 2018increased13.6% to $502.9 million compared to $442.8 million in 2017. Operating expenses per WSEE per month for 2018decreased0.5% to $201 compared to $202 in 2017.

• Salaries of corporate and sales staff increased16.0% to $301.0 million, or $2 per WSEE per month, compared to 2017. The increase was primarily due to a $9.3 million charge related to a one-time tax reform bonus paid to corporate employees, a 10.7% increase in headcount, including a 16.2% increase in BPAs in 2018, and additional incentive compensation expense as a result of stronger operating results.

• Stock-based compensation decreased16.1% to $20.4 million, or $3 per WSEE per month, compared to 2017. This decrease was primarily due to the acceleration of restricted stock awards and associated expense into the fourth quarter of 2017 that were originally scheduled to vest in the first quarter of 2018. Please read Note 1 “Accounting Policies” and Note 9 “Incentive Plans,” to the Consolidated Financial Statements for additional information.

• Commissions expense increased27.2% to $29.0 million, or $2 per WSEE per month, compared to 2017. Commissions are primarily due to commissions associated with the growth in our PEO HR Outsourcing solutions including an increase in the amount of sales channel referral fees paid in 2018.

• Advertising expense increased11.2% to $18.6 million, but decreased$1 on a per WSEE per month basis, compared to 2017. The increase was due to additional spending on sponsorships, promotional items and billboard advertising.

• General and administrative expenses increased9.7% to $111.1 million, but decreased$1 on a per WSEE per month basis, compared to 2017. The increase was due to increased travel and training expenses associated with the increase in BPAs, professional services, technology costs, rent and office expenses, partially offset by the non-recurrence of charitable contributions made in 2017 related to Hurricane Harvey relief efforts.

• Depreciation and amortization expense increased25.6% to $22.8 million, but remained flat on a per WSEE per month basis, compared to 2017. The increase was primarily due to increased capital expenditures related to software development costs.

Insperity 46 2018 Form 10-K

MANAGEMENT’S DISCUSSION AND ANALYSIS OF

FINANCIAL CONDITION AND RESULTS OF OPERATIONS

2017 Compared to 2016

The following table presents certain information related to our operating expenses:

	Year Ended December 31,
	$						WSEE
(in thousands, except per WSEE)	2017		2016		% Change		2017		2016		% Change
Salaries	$	259,531	$	229,589	13.0	%	$	118	$	115	2.6	%
Stock-based compensation	24,345		16,643		46.3	%	11		8		37.5	%
Commissions	22,773		19,288		18.1	%	10		10		—
Advertising	16,686		16,447		1.5	%	8		8		—
General and administrative	101,273		86,693		16.8	%	46		44		4.5	%
Depreciation and amortization	18,182		16,644		9.2	%	9		9		—
Total operating expenses	$	442,790	$	385,304	14.9	%	$	202	$	194	4.1	%

Operating expenses for 2017increased14.9% to $442.8 million compared to $385.3 million in 2016. Operating expenses per WSEE per month for 2017increased4.1% to $202 compared to $194 in 2016.

• Salaries of corporate and sales staff for 2017increased13.0% to $259.5 million, or $3 per WSEE per month, compared to 2016. The increase was primarily due to an 8.3% rise in headcount, including an 11.7% increase in BPAs in 2017 and additional incentive compensation as a result of stronger operating results.

• Stock-based compensation for 2017increased46.3% to $24.3 million, or $3 per WSEE per month, compared to 2016. This increase was primarily due to awards issued under our Long-Term Incentive Program established in 2015 and the acceleration of restricted stock awards that were scheduled to vest in the first quarter of 2018 in order to maximize our tax deduction on certain restricted stock vestings, which would have been limited under the 2017 Tax Reform Act. Stock-based compensation expense represents amortization of restricted stock and long-term incentive awards granted to employees and the annual stock grant made to non-employee directors. Please read Note 1 “Accounting Policies” and Note 9 “Incentive Plans,” to the Consolidated Financial Statements for additional information.

• Commissions expense for 2017increased18.1% to $22.8 million, but remained flat on a per WSEE per month basis, compared to 2016. Commissions are primarily associated with compensation to our sales force for sales of our PEO HR Outsourcing solutions.

• General and administrative expenses for 2017 increased 16.8% to $101.3 million, or $2 per WSEE per month , compared to 2016. Included in 2017 is a $2.0 million donation to Hurricane Harvey relief efforts. The remaining increase was due to increased travel, meals and training on a higher level of corporate employee, event expenses associated with a new client referral program, technology maintenance costs and office costs.

• Depreciation and amortization expense for 2017increased9.2% to $18.2 million, but remained flat on a per WSEE per month basis, compared to 2016. The increase was primarily due to $1.1 million of depreciation and amortization expense related to the new facility opened on our corporate campus in early 2017.

Other Income (Expense)

Other income (expense), net was income of $3.3 million in 2018, income of $0.2 million in 2017 and expense of $1.1 million in 2016. The 2018 increase in income was primarily due to interest income earned on our investments. Please read Note 2 to the Consolidated Financial Statements, “Cash, Cash Equivalents and Marketable Securities,” for additional information.

Income Tax Expense

Our effective income tax rate was 25.7% in 2018, 35.1% in 2017 and 37.3% in 2016.

Insperity 47 2018 Form 10-K

MANAGEMENT’S DISCUSSION AND ANALYSIS OF

FINANCIAL CONDITION AND RESULTS OF OPERATIONS

During 2018 we incurred federal and state income tax expense of $46.9 million on pre-tax income of $182.4 million. Our provision for income taxes differed from the U.S. statutory rate of 21% primarily due to state income taxes and non-deductible expenses, offset by a $2.7 million tax benefit associated wtih equity compensation.

During 2017 we incurred federal and state income tax expense of $45.7 million on pre-tax income of $130.1 million. Our provision for income taxes differed from the U.S. statutory rate of 35% primarily due to state income taxes and non-deductible expenses, including a non-cash tax charge of $2.5 million related to the enactment of the 2017 Tax Reform Act offset by $6.2 million of tax benefits associated with equity compensation.

During 2016 we incurred federal and state income tax expense of $39.2 million on pre-tax income of $105.2 million. Our provision for income taxes differed from the U.S. statutory rate of 35% primarily due to state income taxes and non-deductible expenses. In addition, during 2016, as a result of our adoption of Accounting Standard Update No. 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share Based Payment Accounting, we recognized income tax benefits of $1.5 million related to the vesting of restricted stock awards and exercise of non-qualified stock options.

Please read Note 1 “Accounting Policies” and Note 7 “Income Taxes,” to the Consolidated Financial Statements for additional information.

Non-GAAP Financial Measures

Non-GAAP financial measures are not prepared in accordance with GAAP and may be different from non-GAAP financial measures used by other companies. Non-GAAP financial measures should not be considered as a substitute for, or superior to, measures of financial performance prepared in accordance with GAAP. Investors are encouraged to review the reconciliation of the non-GAAP financial measures used to their most directly comparable GAAP financial measures as provided in the tables below.

Insperity 48 2018 Form 10-K

MANAGEMENT’S DISCUSSION AND ANALYSIS OF

FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Non-GAAP Measure	Definition	Benefit of Non-GAAP Measure
Non-bonus payroll cost	Non-bonus payroll cost is a non-GAAP financial measure that excludes the impact of bonus payrolls paid to our WSEEs. Bonus payroll cost varies from period to period, but has no direct impact to our ultimate workers’ compensation costs under the current program.	Our management refers to non-bonus payroll cost in analyzing, reporting and forecasting our workers’ compensation costs. We include these non-GAAP financial measures because we believe they are useful to investors in allowing for greater transparency related to the costs incurred under our current workers’ compensation program.
Adjusted cash, cash equivalents and marketable securities	Excludes funds associated with: •  federal and state income tax withholdings, •  employment taxes, •  other payroll deductions, and •  client prepayments.	We believe that the exclusion of the identified items helps us reflect the fundamentals of our underlying business model and analyze results against our expectations, against prior periods, and to plan for future periods by focusing on our underlying operations. We believe that the adjusted results provide relevant and useful information for investors because they allow investors to view performance in a manner similar to the method used by management and improves their ability to understand and assess our operating performance. Adjusted EBITDA is used by our lenders to assess our leverage and ability to make interest payments.
Adjusted operating expense	Represents operating expenses excluding the impact of the following: •  costs associated with a one-time tax reform bonus paid to corporate employees and •  charitable donations to Hurricane Harvey relief efforts.
EBITDA	Represents net income computed in accordance with GAAP, plus: •  interest expense, •  income tax expense, and •  depreciation and amortization expense.
Adjusted EBITDA	Represents EBITDA plus: •  non-cash stock based compensation, •  costs associated with a one-time tax reform bonus paid to corporate employees, and •  charitable donations to Hurricane Harvey relief efforts.
Adjusted net income	Represents net income computed in accordance with GAAP, excluding: •  non-cash stock based compensation, •  costs associated with a one-time tax reform bonus paid to corporate employees, and •  charitable donations to Hurricane Harvey relief efforts.
Adjusted EPS	Represents diluted net income per share computed in accordance with GAAP, excluding: •  non-cash stock based compensation, •  costs associated with a one-time tax reform bonus paid to corporate employees, and •  charitable donations to Hurricane Harvey relief efforts.

Following is a reconciliation of payroll cost (GAAP) to non-bonus payroll costs (non-GAAP):

	Year Ended December 31,
(in thousands, except per WSEE per month)	2018						2017						2016
	$			WSEE			$			WSEE			$			WSEE
Payroll cost	$	20,002,182		$	7,971		$	16,873,589		$	7,697		$	14,991,510		$	7,533
Less: Bonus payroll cost	2,498,875			996			1,959,053			894			1,648,936			829
Non-bonus payroll cost	$	17,503,307		$	6,975		$	14,914,536		$	6,803		$	13,342,574		$	6,704
% Change year over year	17.4		%	2.5		%	11.8		%	1.5		%	15.1		%	1.2		%

Insperity 49 2018 Form 10-K

MANAGEMENT’S DISCUSSION AND ANALYSIS OF

FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Following is a reconciliation of EBITDA (GAAP) and adjusted EBITDA (non-GAAP):

(in thousands, except per WSEE per month)	Year Ended December 31,
	2018						2017						2016						2015						2014
	$			WSEE			$			WSEE			$			WSEE			$			WSEE			$			WSEE
Net income	$	135,413		$	54		$	84,402		$	38		$	65,991		$	33		$	39,390		$	23		$	28,004		$	18
Income tax expense	46,947			19			45,739			21			39,186			19			26,229			14			19,623			13
Interest expense	4,668			2			3,213			1			2,396			1			459			—			370			—
Depreciation and amortization	22,842			9			18,182			9			16,644			9			18,565			11			21,387			14
EBITDA	209,870			84			151,536			69			124,217			62			84,643			48			69,384			45
Impairment charges and other	—			—			—			—			—			—			10,480			6			3,687			2
Stock-based compensation	20,425			8			24,345			11			16,643			8			13,345			8			11,053			7
One-time tax reform bonus	9,306			3			—			—			—			—			—			—			—			—
Charitable donations to Hurricane Harvey relief efforts	—			—			2,000			1			—			—			—			—			—			—
Other	—			—			(200		)	—			—			—			—			—			—			—
Stockholder advisory expenses	—			—			—			—			323			1			1,546			1			—			—
Adjusted EBITDA	$	239,601		$	95		$	177,681		$	81		$	141,183		$	71		$	110,014		$	63		$	84,124		$	54
% Change year over year	34.8		%	17.3		%	25.9		%	14.1		%	28.3		%	12.7		%	30.8		%	16.7		%	(8.9		)%	(10.0		)%

Following is a reconciliation of cash, cash equivalents and marketable securities (GAAP) to adjusted cash, cash equivalents and marketable securities (non-GAAP) to adjusted cash, cash equivalents and marketable securities (non-GAAP):

	December 31,
(in thousands)	2018		2017
Cash, cash equivalents and marketable securities	$	387,554	$	356,220
Less:
Amounts payable for withheld federal and state income taxes, employment taxes and other payroll deductions	224,487		271,547
Client prepayments	34,177		23,603
Adjusted cash, cash equivalents and marketable securities	$	128,890	$	61,070

Insperity 50 2018 Form 10-K

MANAGEMENT’S DISCUSSION AND ANALYSIS OF

FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Following is a reconciliation of operating expenses (GAAP) to adjusted operating expenses (non-GAAP):

	Year Ended December 31,
(in thousands, except per WSEE per month)	2018						2017						2016
	$			WSEE			$			WSEE			$			WSEE
Operating expenses	$	502,873		$	201		$	442,790		$	202		$	385,304		$	194
Less:
One-time tax reform bonus	9,306			4			—			—			—			—
Charitable donations to Hurricane Harvey relief efforts	—			—			2,000			1			—			—
Stockholder advisory expenses	—			—			—			—			323			1
Adjusted operating expenses	$	493,567		$	197		$	440,790		$	201		$	384,981		$	193
% Change year over year	12.0		%	(2.0		)%	14.5		%	4.1		%	6.9		%	(6.3		)%

Following is a reconciliation of net income (GAAP) to adjusted net income (non-GAAP):

	Year Ended December 31,
(in thousands)	2018			2017			2016			2015			2014
Net income	$	135,413		$	84,402		$	65,991		$	39,390		$	28,004
Non-GAAP adjustments:
Impairment charges and other(1)	—			—			—			10,480			3,687
Stock-based compensation	20,425			24,345			16,643			13,345			11,053
One-time tax reform bonus	9,306			—			—			—			—
Charitable donations to Hurricane Harvey relief efforts	—			2,000			—			—			—
Other	—			(200		)	—			—			—
Stockholder advisory expenses	—			—			323			1,546			—
Total non-GAAP adjustments	29,731			26,145			16,966			25,371			14,740
Tax effect of non-GAAP adjustments	(7,608		)	(9,354		)	(6,239		)	(10,242		)	(6,010		)
Enactment of the 2017 Tax Reform Act	—			2,481			—			—			—
Disaster relief tax credit	—			(669		)	—			—			—
Adjusted net income	$	157,536		$	103,005		$	76,718		$	54,519		$	36,734
% Change year over year	52.9		%	34.3		%	40.7		%	48.4		%	(13.1		)%

____________________________________

⁽¹⁾  Includes impairment and other charges of $10. 5 million related to the sale of two aircraft in 2015, a $2.5 million charge associated with the Employment Screening reporting unit in 2014 and a $1.2 million non-cash charge related to a revision in our office consolidation plans in 2014.

Insperity 51 2018 Form 10-K

MANAGEMENT’S DISCUSSION AND ANALYSIS OF

FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Following is a reconciliation of diluted EPS (GAAP) to adjusted EPS (non-GAAP)⁽¹⁾:

	Year Ended December 31,
(amounts per share)	2018			2017			2016			2015			2014
Diluted EPS	$	3.22		$	2.01		$	1.54		$	0.79		$	0.53
Non-GAAP adjustments:
Impairment charges and other	—			—			—			0.21			0.07
Stock-based compensation	0.49			0.58			0.39			0.27			0.21
One-time tax reform bonus	0.22			—			—			—			—
Charitable donations to Hurricane Harvey relief efforts	—			0.05			—			—			—
Other	—			(0.01		)	—			—			—
Stockholder advisory expenses	—			—			0.01			0.03			—
Impact of dividends exceeding earnings	—			—			—			—			0.03
Total non-GAAP adjustments	0.71			0.62			0.40			0.51			0.31
Tax effect of non-GAAP adjustments	(0.18		)	(0.22		)	(0.15		)	(0.20		)	(0.12		)
Enactment of the 2017 Tax Reform Act	—			0.06			—			—			—
Disaster relief tax credit	—			(0.02		)	—			—			—
Adjusted EPS	$	3.75		$	2.45		$	1.79		$	1.10		$	0.72
% Change year over year	53.1		%	36.9		%	62.7		%	52.8		%	(13.3		)%

____________________________________

⁽¹⁾  Per share amounts for the years 2017, 2016, 2015 and 2014 have been adjusted to reflect the two-for-one split of our common stock effected on December 18, 2017 as a stock dividend.

Liquidity and Capital Resources

We periodically evaluate our liquidity requirements, capital needs and availability of resources in view of, among other things, our expansion plans, stock repurchases, potential acquisitions, debt service requirements and other operating cash needs. To meet short-term liquidity requirements, which are primarily the payment of direct costs and operating expenses, we rely primarily on cash from operations. Longer-term projects, large stock repurchases or significant acquisitions may be financed with debt or equity. We may seek to raise additional capital or take other steps to increase or manage our liquidity and capital resources. We had $387.6 million in cash, cash equivalents and marketable securities at December 31, 2018, of which approximately $224.5 million was payable in early January 2019 for withheld federal and state income taxes, employment taxes and other payroll deductions, and $34.2 million were client prepayments that were payable in January 2019. At December 31, 2018, we had working capital of $94.2 million compared to $54.2 million at December 31, 2017. The increase in working capital reflects, in part, cash flow from operations and borrowings under our facility, offset by share repurchases, dividends and capital expenditures. We currently believe that our cash on hand, marketable securities, cash flows from operations and availability under our credit facility will be adequate to meet our liquidity requirements for 2019. We intend to rely on these same sources, as well as public and private debt or equity financing, to meet our longer-term liquidity and capital needs.

We have a credit facility with a syndicate of financial institutions. In December 2018, we borrowed $40.0 million under the credit facility, which was used for general corporate purposes. In January 2016, we borrowed $104.4 million under the credit facility, which we used to fund a portion of the purchase price for our modified Dutch auction tender offer. In February 2018, the credit facility was increased from $200 million to $350 million. The credit facility, which may be increased to $400 million based on the terms and subject to the conditions set forth in the agreement related to the facility, is available for working capital and general corporate purposes, including acquisitions. At December 31, 2018, we had outstanding letters of credit and borrowings totaling $145.4 million under the credit facility. Please read Note 6 to the Consolidated Financial Statements, “Long-Term Debt,” for additional information.

Insperity 52 2018 Form 10-K

MANAGEMENT’S DISCUSSION AND ANALYSIS OF

FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Cash Flows from Operating Activities

Our net cash flows from operating activities in 2018 were $184.5 million. Our primary source of cash from operations is the comprehensive service fee and payroll funding we collect from our PEO HR Outsourcing solutions clients. Cash and cash equivalents, and thus our reported cash flows from operating activities, are significantly impacted by various external and internal factors, which are reflected in part by the changes in our balance sheet accounts. These include the following:

• Timing of client payments / payroll taxes – We typically collect our comprehensive service fee, along with the client’s payroll funding, from clients at least one day prior to the payment of worksite employee payrolls and associated payroll taxes. Therefore, the last business day of a reporting period has a substantial impact on our reporting of operating cash flows. For example, many WSEEs are paid on Fridays and at month-end; therefore, operating cash flows decrease in the reporting periods that end on a Friday. In the year ended December 31, 2018, the last business day of the reporting period ended on a Monday, client prepayments were $34.2 million and amounts payable for withheld federal and state income taxes, employment taxes and other payroll deductions was $224.5 million. In the period ended December 31, 2017, which ended on a Friday, client prepayments were $23.6 million and amounts payable for withheld federal and state income taxes, employment taxes and other payroll deductions was $271.5 million.

• Workers’ compensation plan funding – In 2018 and 2017, we received $19.4 million and $22.7 million, respectively, for the return of excess claim funds related to the workers’ compensation program, which increased working capital.

• Medical plan funding – Our health care contract with United establishes participant cash funding rates 90 days in advance of the beginning of a reporting quarter. Therefore, changes in the participation level of the United plan have a direct impact on our operating cash flows. In addition, changes to the funding rates, which are determined solely by United based primarily upon recent claim history and anticipated cost trends, also have a significant impact on our operating cash flows. As of December 31, 2018, Plan Costs were more than the net premiums paid and owed to United by $6.3 million, which is $15.3 millionless than our agreed-upon $9.0 million surplus maintenance level. The $15.3 million difference is therefore reflected as a current liability and $9.0 million is reflected as a long-term asset on our Consolidated Balance Sheets at December 31, 2018. In addition, the premiums owed to United at December 31, 2018, were $15.2 million, which is included in accrued health insurance costs, a current liability, on our Consolidated Balance Sheets.

• Operating results – Our net income has a significant impact on our operating cash flows. Our net income increased60.4% to $135.4 million in 2018 from $84.4 million in 2017. Please read “Results of Operations.”

Cash Flows from Investing Activities

Our net cash flows used in investing activities were $94.1 million during 2018, primarily due to $59.0 million in purchases of marketable securities, net of maturities and dispositions, and $35.3 million in property and equipment purchases.

Cash Flows from Financing Activities

Our net cash flows used in financing activities were $104.5 million during 2018. We repurchased $113.3 million in stock and paid $33.4 million in dividends, offset by borrowings of $40.0 million under our Facility. Please read Note 6 to the Consolidated Financial Statements, “Long-Term Debt,” for additional information.

Insperity 53 2018 Form 10-K

MANAGEMENT’S DISCUSSION AND ANALYSIS OF

FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Contractual Obligations and Commercial Commitments

The following table summarizes our contractual obligations and commercial commitments as of December 31, 2018, and the effect they are expected to have on our liquidity and capital resources:

(in thousands)	Total		2019		2020-2021		2022-2023		Thereafter
Non-cancelable operating leases	$	93,851	$	16,542	$	30,257	$	23,414	$	23,638
Purchase obligations(1)	54,990		16,535		29,276		8,479		700
Long-term debt	144,400		—		—		144,400		—
Other long-term liabilities:
Accrued workers’ compensation claim costs(2)	229,639		42,227		52,118		39,444		95,850
Total contractual cash obligations	$	522,880	$	75,304	$	111,651	$	215,737	$	120,188

____________________________________

⁽¹⁾  The table includes purchase obligations associated with non-cancelable contracts individually greater than $100,000 and one year.

⁽²⁾  Accrued workers’ compensation claim costs include the short and long-term amounts. For more information, please read, “—Critical Accounting Policies and Estimates—Workers’ Compensation Costs.”

Seasonality, Inflation and Quarterly Fluctuations

Our quarterly earnings are impacted by the seasonal nature of our medical claims costs and payroll taxes. Typically, medical claims costs tend to increase throughout the year with the fourth quarter being the period with the highest costs, which has a negative impact on our fourth quarter earnings. This trend is primarily the result of many WSEEs’ medical plan deductibles being fully met by the fourth quarter, which increases our liability with respect to those claims. We have also experienced variability on a quarterly basis in medical claims costs based on the unpredictable nature of large claims. Payroll taxes and associated billings are computed based on an employee’s annual taxable wage base. The annual payroll tax wage bases are frequently met in the first two quarters of each year depending on the employee’s compensation levels. As a result, the gross profit contribution from payroll taxes is typically higher in the first two quarters and declines in the latter half of each year. These historical trends may change and other seasonal trends may develop in the future. For further information related to our health insurance costs, please read “—Critical Accounting Policies and Estimates—Benefits Costs.”

We believe the effects of inflation have not had a significant impact on our results of operations or financial condition.

Insperity 54 2018 Form 10-K

QUANTITIVE AND QUALITATIVE DISCLOSURES

Item 7A.  Quantitative and Qualitative Disclosures About Market Risk.

We are primarily exposed to market risks from fluctuations in interest rates and the effects of those fluctuations on the market values of our cash equivalent short-term investments and our available-for-sale marketable securities. In addition, borrowings under our credit facility bear interest at a variable market rate. As of December 31, 2018, we had outstanding letters of credit and borrowings totaling $145.4 million under the credit facility. Please read Note 6 to the Consolidated Financial Statements, “Long-Term Debt,” for additional information. Our cash equivalent short-term investments consist primarily of overnight investments, which are not significantly exposed to interest rate risk, except to the extent that changes in interest rates will ultimately affect the amount of interest income earned on these investments. Our available-for-sale marketable securities are subject to interest rate risk because these securities generally include a fixed interest rate. As a result, the market values of these securities are affected by changes in prevailing interest rates.

We attempt to limit our exposure to interest rate risk primarily through diversification and low investment turnover. Our investment policy is designed to maximize after-tax interest income while preserving our principal investment. As a result, our marketable securities consist of tax-exempt short and intermediate-term debt securities, which are primarily pre-refunded municipal bonds that are secured by escrow funds containing U.S. Government Securities.

Item 8.  Financial Statements and Supplementary Data.

The information required by this Item 8 is contained in a separate section of this Annual Report. See “Index to Consolidated Financial Statements.”

Insperity 55 2018 Form 10-K

DISCLOSURE CONTROLS AND PROCEDURES

Item 9.  Changes in and Disagreements with Accountants on Accounting and Financial Disclosure.

None.

Item 9A.  Controls and Procedures.

Evaluation of Disclosure Controls and Procedures

In accordance with Exchange Act Rules 13a-15 and 15a-15, we carried out an evaluation, under the supervision and with the participation of management, including our Chief Executive Officer and Chief Financial Officer, of the effectiveness of our disclosure controls and procedures as of the end of the period covered by this report. Based on that evaluation, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures were effective as of December 31, 2018.

Design and Evaluation of Internal Control over Financial Reporting

Pursuant to Section 404 of the Sarbanes-Oxley Act of 2002, we included a report of management’s assessment of the design and effectiveness of our internal controls as part of this Annual Report on Form 10-K for the fiscal year ended December 31, 2018. Ernst & Young LLP, our independent registered public accounting firm, also audited our internal control over financial reporting. Management’s report and the independent registered public accounting firm’s audit report are included in our 2018 Consolidated Financial Statements under the captions entitled “Management’s Report on Internal Control” and “Report of Independent Registered Public Accounting Firm,” and are incorporated herein by reference.

There has been no change in our internal controls over financial reporting that occurred during the three months ended December 31, 2018, that has materially affected, or is reasonably likely to materially affect, our internal controls over financial reporting.

Item 9B.  Other Information.

Entry into a Material Definitive Agreement

On February 8, 2019, our wholly-owned subsidiary, Insperity Services, L.P. (“Insperity Services”), entered into a Standard Form of Agreement between Owner and Contractor (the “Construction Agreement”) with David E. Harvey Builders, Inc. (the “Contractor”). Under the Construction Agreement, the Contractor will supervise and direct the construction of a new ten-story office building and parking garage at our headquarters in Kingwood, Texas, which is expected to be completed in 2020. The Construction Agreement includes customary terms and indemnity provisions and contemplates an agreement between Insperity Services and Kirksey Architects, Inc., the project architect. Insperity Services will pay the Contractor an amount equal to the cost of work plus a fee equal to a percentage of the cost of work, with payments being made in installments based on the progress of the project. The aggregate amount under the Construction Agreement is expected to be between $65 million and $75 million, including the initial work order.

Insperity 56 2018 Form 10-K

MANAGEMENT AND CERTAIN SECURITY HOLDERS

PART III

Item 10.  Directors, Executive Officers and Corporate Governance.

Some of the information required by this item is incorporated by reference to the information set forth under the captions “Election of Directors” and “Section 16(a) Beneficial Ownership Reporting Compliance” in our definitive Proxy Statement to be filed with the Securities and Exchange Commission pursuant to Regulation 14A within 120 days after the end of the fiscal year covered by this report (the “Insperity Proxy Statement”).

Code of Business Conduct and Ethics

Our Board adopted our Code of Business Conduct and Ethics (the “Code of Ethics”), which meets the requirements of Rule 303A.10 of the New York Stock Exchange Listed Company Manual and Item 406 of Regulation S-K. You can access our Code of Ethics on the Corporate Governance page of our website at insperity.com. Changes in and waivers to the Code of Ethics for our directors, executive officers and certain senior financial officers will be posted on our Internet website within five business days and maintained for at least 12 months.

Item 11.  Executive Compensation.

The information required by this item is incorporated by reference to the information set forth under the captions “Director Compensation” and “Executive Compensation” in the Insperity Proxy Statement.

Item 12.   Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.

The information required by this item is incorporated by reference to the information set forth under the caption “Security Ownership of Certain Beneficial Owners and Management” in the Insperity Proxy Statement.

Item 13.  Certain Relationships and Related Transactions, and Director Independence.

The information required by this item is incorporated by reference to the information set forth under the caption “Certain Relationships and Related Transactions” in the Insperity Proxy Statement.

Item 14.  Principal Accounting Fees and Services.

The information required by this item is incorporated by reference to the information set forth under the caption “Ratification and Appointment of Independent Public Accountants – Fees of Ernst & Young LLP” and “—Finance, Risk Management and Audit Committee Pre-Approval Policy for Audit and Non-Audit Services” in the Insperity Proxy Statement.

Insperity 57 2018 Form 10-K

EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

PART IV

Item 15.  Exhibits, Financial Statement Schedules.

(a)	1.	Financial Statements of the Company
		The Consolidated FInancial Statements listed by the Registrant on the accompanying Index to Consolidated FInancial Statements are filed as part of this Annual Report.
(a)	2.	Financial Statement Schedules
		The required information is included in the Consolidated Financial Statements or Notes thereto.
(a)	3.	List of Exhibits

Exhibit No.	Exhibit
3.1	Amended and Restated Certificate of Incorporation (incorporated by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K filed on May 29, 2018).
3.2	Amended and Restated Bylaws of Insperity, Inc. dated February 17, 2014 (incorporated by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K filed on February 18, 2014).
4.1	Specimen Common Stock Certificate (incorporated by reference to Exhibit 4.1 to the Registrant’s Registration Statement on Form S-1 (No. 33-96952)).
10.1†	Insperity, Inc. 2001 Incentive Plan, as amended and restated (incorporated by reference to Appendix A to the Registrant’s definitive proxy statement on Schedule 14A filed on March 18, 2009 (No. 1-13998)).
10.2†	Form of Director Stock Option Agreement (Annual Grant) (incorporated by reference to Exhibit 10.11 to the Registrant’s Form 10-K for the year ended December 31, 2004).
10.3†	Form of Restricted Stock Agreement (incorporated by reference to Exhibit 10.1 to the Registrant’s Form 10-Q for the quarter ended September 30, 2012).
10.4†	Form of Director Stock Option Agreement (incorporated by reference to Exhibit 10.2 to the Registrant’s Form 10-Q for the quarter ended September 30, 2012).
10.5†	Form of Director Restricted Stock Award Agreement (incorporated by reference to Exhibit 10.3 to the Registrant’s Form 10-Q for the quarter ended September 30, 2012).
10.6†	Form of Employee Restricted Stock Award Agreement (incorporated by reference to Exhibit 10.2 to the Registrant’s Current Report on Form 8-K filed on February 22, 2013).
10.7†	Form of New Hire Employee Restricted Stock Award Agreement (incorporated by reference to Exhibit 10.3 to the Registrant’s Current Report on Form 8-K filed on February 22, 2013).
10.8†	Form of Named Executive Officer Restricted Stock Award Agreement (incorporated by reference to Exhibit 10.4 to the Registrant’s Current Report on Form 8-K filed on February 22, 2013).
10.9†	Form of Director Restricted Stock Award Agreement (incorporated by reference to Exhibit 10.5 to the Registrant’s Current Report on Form 8-K filed on February 22, 2013).
10.10†	Form of Employee Award Notice and Agreement (incorporated by reference to Exhibit 10.2 to the Registrant’s Current Report on Form 8-K filed on April 2, 2015).
10.11†	Form of Executive Officer Restricted Stock Award Agreement for awards granted on or after March 29, 2016 (incorporated by reference to Exhibit 10.2 to the Registrant’s Current Report on Form 8-K filed on April 1, 2016).
10.12†	Form of Employee Award Notice and Agreement under LTIP for awards granted on or after March 29, 2016 (incorporated by reference to Exhibit 10.3 to the Registrant’s Current Report on Form 8-K filed on April 1, 2016).
10.13†	Form of Restricted Stock Award Agreement for awards granted to certain senior personnel on or after March 29, 2016 (incorporated by reference to Exhibit 10.5 to the Registrant’s Form 10-Q for the quarter ended March 31, 2016).
10.14†	Form of Restricted Stock Award Agreement for awards granted to other employees on or after March 29, 2016 (incorporated by reference to Exhibit 10.6 to the Registrant’s Form 10-Q for the quarter ended March 31, 2016).

Insperity 58 2018 Form 10-K

EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

Exhibit No.	Exhibit
10.15†	Form of Restricted Stock Award Agreement for awards granted to executive officers on or after November 10, 2017 (incorporated by reference to Exhibit 10.1 to the Registrant’s Form 10-Q for the quarter ended September 30, 2017).
10.16†	Form of Restricted Stock Award Agreement for awards granted to certain senior personnel on or after November 10, 2017 (incorporated by reference to Exhibit 10.2 to the Registrant’s Form 10-Q for the quarter ended September 30, 2017).
10.17†	Form of Restricted Stock Award Agreement for awards granted to other employees on or after November 10, 2017 (incorporated by reference to Exhibit 10.3 to the Registrant’s Form 10-Q for the quarter ended September 30, 2017).
10.18†	Form of Employee Award Notice and Agreement under LTIP granted on or after November 10, 2017 (incorporated by reference to Exhibit 10.4 to the Registrant’s Form 10-Q for the quarter ended September 30, 2017).
10.19†	Directors Compensation Plan (incorporated by reference to Exhibit 10.4 to the Registrant’s Form 10-Q for the quarter ended September 30, 2012).
10.20†	Amendment to the Directors Compensation Plan (incorporated by reference to Exhibit 10.6 to the Registrant’s Current Report on Form 8-K filed on February 22, 2013).
10.21†	First Amendment and Appendix A to Directors Compensation Plan (incorporated by reference to Exhibit 10.2 to the Registrant’s Current Report on Form 8-K filed on February 25, 2015).
10.22†	Board of Directors Compensation Arrangements (incorporated by reference to the Registrant’s Current Report on Form 8-K dated February 7, 2005).
10.23†	Directors Compensation Plan (as amended and restated April 1, 2017) (incorporated by reference to Exhibit 10.2 to the Registrant’s Form 10-Q for the quarter ended June 30, 2017).
10.24	Insperity, Inc. 2008 Employee Stock Purchase Plan (incorporated by reference to Exhibit 10.1 to the Registrant’s Registration Statement on Form S-8 (No. 333-151275)).
10.25	Insperity, Inc. 2012 Incentive Plan (incorporated by reference to the Registrant’s definitive proxy statement on Schedule 14A filed on March 29, 2012 (No. 1-13998)).
10.26	First Amendment to the Insperity, Inc. 2012 Incentive Plan (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed on February 22, 2013).
10.27	Second Amendment to Insperity, Inc. 2012 Incentive Plan (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed on February 25, 2015).
10.28	Third Amendment to Insperity, Inc. 2012 Incentive Plan (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed on April 1, 2016).
10.29	Insperity, Inc. 2012 Incentive Plan, as amended and restated (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed on June 21, 2017).
10.30	Insperity, Inc. Long-Term Incentive Program (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed on April 2, 2015).
10.31(+)	Minimum Premium Financial Agreement, amended and restated effective January 1, 2005, by and between Insperity Holdings, Inc. (fka Administaff of Texas, Inc.) and United Healthcare Insurance Company (incorporated by reference to Exhibit 10.1 to the Registrant’s Form 10-Q for the quarter ended June 30, 2005).
10.32(+)	Minimum Premium Administrative Services Agreement, amended and restated effective January 1, 2005, by and between Insperity Holdings, Inc. (fka Administaff of Texas, Inc.) and United Healthcare Insurance Company (incorporated by reference to Exhibit 10.2 to the Registrant’s Form 10-Q for the quarter ended June 30, 2005).
10.33(+)	Amendment to Minimum Premium Financial Agreement, as amended and restated effective January 1, 2005, by and between Insperity Holdings, Inc., and UnitedHealthcare Insurance Company (incorporated by reference to Exhibit 10.2 to the Registrant’s Form 10-Q for the quarter ended June 30, 2007).
10.34(+)	Amendment to Minimum Premium Administrative Services Agreement, as amended and restated effective January 1, 2005, by and between Insperity Holdings, Inc., and UnitedHealthcare Insurance Company (incorporated by reference to Exhibit 10.3 to the Registrant’s Form 10-Q for the quarter ended June 30, 2007).
10.35(+)	Amendment to Minimum Premium Financial Agreement, as amended effective January 1, 2009, by and between Insperity Holdings, Inc. (fka Administaff of Texas, Inc.) and United Healthcare Insurance Company (incorporated by reference to Exhibit 10.1 to the Registrant’s Form 10-Q for the quarter ended March 31, 2013).

Insperity 59 2018 Form 10-K

EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

Exhibit No.	Exhibit
10.36(+)	Amendment to Minimum Premium Financial Agreement, as amended effective January 1, 2013, by and between Insperity Holdings, Inc. and United Healthcare Insurance Company (incorporated by reference to Exhibit 10.2 to the Registrant’s Form 10-Q for the quarter ended September 30, 2015).
10.37(+)	Amendment to Minimum Premium Administrative Services Agreement, as amended effective January 1, 2008, by and between Insperity Holdings, Inc. (fka Administaff of Texas, Inc.) and UnitedHealthcare Insurance Company (incorporated by reference to Exhibit 10.2 to the Registrant’s Form 10-Q for the quarter ended March 31, 2013).
10.38(+)	Amendment to Minimum Premium Administrative Services Agreement, as amended effective January 1, 2013, by and between Insperity Holdings, Inc. and UnitedHealthcare Insurance Company, effective as of January 1, 2015 (incorporated by reference to Exhibit 10.3 to the Registrant’s Form 10-Q for the quarter ended September 30, 2015).
10.39(+)	Amendment to Minimum Premium Financial Agreement, as amended effective January 1, 2011, by and between Insperity Holdings, Inc. (fka Administaff of Texas, Inc.) and UnitedHealthcare Insurance Company, effective as of January 1, 2013 (incorporated by reference to Exhibit 10.2 to the Registrant’s Form 10-Q for the quarter ended September 30, 2014).
10.40(+)	Amendment to Minimum Premium Administrative Services Agreement, as amended effective January1, 2011, by and between Insperity Holdings, Inc. (fka Administaff of Texas, Inc.) and UnitedHealthcare Insurance Company, effective as of January 1, 2013 (incorporated by reference to Exhibit 10.3 to the Registrant’s Form 10-Q for the quarter ended September 30, 2014).
10.41(+)	Amendment to the Minimum Premium Financial Agreement, as amended effective January 1, 2015, by and between Insperity Holdings, Inc. and UnitedHealthcare Insurance Company, effective as of January 1, 2016 (incorporated by reference to Exhibit 10.2 to the Registrant’s Form 10-Q for the quarter ended June 30, 2016).
10.42(+)	Amendment to the Minimum Premium Administrative Services Agreement, as amended effective January 1, 2015, by and between Insperity Holdings, Inc. and UnitedHealthcare Insurance Company, effective as of January 1, 2016 (incorporated by reference to Exhibit 10.3 to the Registrant’s Form 10-Q for the quarter ended June 30, 2016).
10.43(+)	Amendment to the Minimum Premium Financial Agreement, as amended effective January 1, 2016, by and between Insperity Holdings, Inc. and UnitedHealthcare Insurance Company, effective as of January 1, 2017 (incorporated by reference to Exhibit 10.39 to the Registrant’s Form 10-K for the year ended December 31, 2016).
10.44(+)	Letter of Agreement dated May 3, 2018 by and between Insperity Holdings, Inc. and UnitedHealthcare Insurance Company (incorporated by reference to Exhibit 10.1 to the Registrant’s Form 10-Q for the quarter ended June 30, 2018).
10.45	Amended and Restated Credit Agreement dated February 6, 2018 (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed on February 12, 2018).
21.1*	Subsidiaries of Insperity, Inc.
23.1*	Consent of Independent Registered Public Accounting Firm.
24.1*	Powers of Attorney.
31.1*	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2*	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1**	Certification of Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2**	Certification of Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS*	XBRL Instance Document(1).
101.SCH*	XBRL Taxonomy Schema Document.
101.CAL*	XBRL Taxonomy Extension Calculation Linkbase Document.
101.DEF*	XBRL Extension Definition Linkbase Document.
101.LAB*	XBRL Taxonomy Extension Label Linkbase Document.
101.PRE*	XBRL Taxonomy Extension Presentation Linkbase Document.
*	Filed herewith.
**	Furnished with this report.
†	Management contract or compensatory plan or arrangement required to be filed as an exhibit to this Form 10-K.

Insperity 60 2018 Form 10-K

EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

Exhibit No.	Exhibit
(+)	Confidential treatment has been requested for this exhibit and confidential portions have been filed with the Securities and Exchange Commission.

____________________________________

⁽¹⁾  Attached as exhibit 101 to this report are the following documents formatted in XBRL (Extensible Business Reporting Language): (1) the Consolidated Statements of Operations for the years ended December 31, 2018, 2017 and 2016; (2) the Consolidated Balance Sheets at December 31, 2018 and 2017; (3) the Consolidated Statements of Comprehensive Income for the years ended December 31, 2018, 2017 and 2016; (4) the Consolidated Statements of Stockholders’ Equity for the years ended December 31, 2018, 2017 and 2016; and (5) the Consolidated Statements of Cash Flows for the years ended December 31, 2018, 2017 and 2016.

ITEM 16.  FORM 10-K SUMMARY.

None.

Insperity 61 2018 Form 10-K

SIGNATURES

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, Insperity, Inc. has duly caused this report to be signed in its behalf by the undersigned, thereunto duly authorized, on February 11, 2019.

INSPERITY, INC.
By:	/s/ Douglas S. Sharp
	Douglas S. Sharp
	SeniorVice President of Finance
	Chief Financial Officer and Treasurer

Insperity 62 2018 Form 10-K

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed by the following persons on behalf of Insperity, Inc. in the capacities indicated on February 11, 2019:

Signature	Title
/s/ Paul J. Sarvadi	Chairman of the Board, Chief Executive Officer
Paul J. Sarvadi	and Director
	(Principal Executive Officer)
/s/ Douglas S. Sharp	Senior Vice President of Finance
Douglas S. Sharp	Chief Financial Officer and Treasurer
	(Principal Financial Officer)
*	Director
Timothy Clifford
*	Director
Carol R. Kaufman
*	Director
Ellen H. Masterson
*	Director
Randall Mehl
*	Director
John Morphy
*	Director
Richard G. Rawson
/s/ Austin P. Young	Director
Austin P. Young
*By: /s/ Daniel D. Herink
Daniel D. Herink, attorney-in-fact

Insperity 63 2018 Form 10-K

CONSOLIDATED FINANCIAL STATEMENTS

INSPERITY, INC.

INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

Report of Independent Registered Public Accounting Firm	F-2
Management’s Report on Internal Control	F-3
Report of Independent Registered Public Accounting Firm on Internal Control over Financial Reporting	F-4
Consolidated Balance Sheets	F-5
Consolidated Statements of Operations	F-6
Consolidated Statements of Comprehensive Income	F-7
Consolidated Statements of Stockholders’ Equity	F-8
Consolidated Statements of Cash Flows	F-9
Notes to Consolidated Financial Statements	F-11

Insperity F-1 2018 Form 10-K

CONSOLIDATED FINANCIAL STATEMENTS

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Stockholders and the Board of Directors of Insperity, Inc.

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Insperity, Inc. (the Company) as of December 31, 2018 and 2017, and the related consolidated statements of operations, comprehensive income, stockholders' equity and cash flows for each of the three years in the period ended December 31, 2018, and the related notes (collectively referred to as the “ consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company at December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2018, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework), and our report dated February 11, 2019 expressed an unqualified opinion thereon.

Basis for Opinion

These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ Ernst & Young LLP

We have served as the Company’s auditor since 1991.

Houston, Texas

February 11, 2019

Insperity F-2 2018 Form 10-K

CONSOLIDATED FINANCIAL STATEMENTS

MANAGEMENT’S REPORT ON INTERNAL CONTROL

The Company has assessed the effectiveness of its internal control over financial reporting as of December 31, 2018, based on criteria established in Internal Control – Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (“COSO”) (2013 framework). The Company’s management is responsible for establishing and maintaining adequate internal controls over financial reporting. The effectiveness of the Company’s internal control over financial reporting as of December 31, 2018 has been audited by the Company’s independent registered public accounting firm, as stated in their report that is included herein.

Internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. Internal control over financial reporting includes those policies and procedures that: (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements. Because of the inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies and procedures may deteriorate.

The Company’s assessment of the effectiveness of its internal control over financial reporting included testing and evaluating the design and operating effectiveness of its internal controls. In management’s opinion, the Company has maintained effective internal control over financial reporting as of December 31, 2018, based on criteria established in the COSO 2013 framework.

/s/ Paul J. Sarvadi	/s/ Douglas S. Sharp
Paul J. Sarvadi	Douglas S. Sharp
Chairman of the Board and	Senior Vice President of Finance
Chief Executive Officer	Chief Financial Officer and Treasurer

Insperity F-3 2018 Form 10-K

CONSOLIDATED FINANCIAL STATEMENTS

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Stockholders and the Board of Directors of Insperity, Inc.

Opinion on Internal Control over Financial Reporting

We have audited Insperity, Inc.’s internal control over financial reporting as of December 31, 2018, based on criteria established in Internal Control — Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (the COSO criteria). In our opinion, Insperity, Inc. (the Company) maintained, in all material respects, effective internal control over financial reporting as of December 31, 2018, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated balance sheets of the Company as of December 31, 2018 and 2017, the related consolidated statements of operations, comprehensive income, stockholders’ equity and cash flows for each of the three years in the period ended December 31, 2018, and the related notes and our report dated February 11, 2019 expressed an unqualified opinion thereon.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management’s Report on Internal Control. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects.

Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control Over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ Ernst & Young LLP

Houston, Texas

February 11, 2019

Insperity F-4 2018 Form 10-K

CONSOLIDATED FINANCIAL STATEMENTS

INSPERITY, INC.

CONSOLIDATED BALANCE SHEETS

(in thousands, except per share amounts)	December 31, 2018		December 31, 2017
Assets
Cash and cash equivalents	$	326,773	$	354,260
Restricted cash	42,227		41,137
Marketable securities	60,781		1,960
Accounts receivable, net	400,623		333,981
Prepaid insurance	8,411		10,782
Other current assets	27,721		26,991
Income taxes receivable	—		9,824
Total current assets	866,536		778,935
Property and equipment, net	117,213		95,659
Prepaid health insurance	9,000		9,000
Deposits	172,674		159,515
Goodwill and other intangible assets, net	12,726		12,762
Deferred income taxes, net	8,816		4,283
Other assets	4,851		3,541
Total assets	$	1,191,816	$	1,063,695

Liabilities and stockholders’ equity
Accounts payable	$	10,622		$	6,447
Payroll taxes and other payroll deductions payable	261,166			303,247
Accrued worksite employee payroll cost	329,979			267,402
Accrued health insurance costs	35,153			26,075
Accrued workers’ compensation costs	45,818			42,974
Accrued corporate payroll and commissions	60,704			52,595
Other accrued liabilities	28,890			25,989
Total current liabilities	772,332			724,729
Accrued workers’ compensation costs	187,412			166,493
Long-term debt	144,400			104,400
Other accrued liabilities	9,996			1,752
Total noncurrent liabilities	341,808			272,645
Commitments and contingencies
Stockholders’ equity:
Preferred stock ($0.01 per share par value; 20,000 shares authorized; no shares issued and outstanding)	—			—
Common stock ($0.01 per share par value; 60,000 shares authorized; 55,489 shares issued and outstanding)	555			555
Additional paid-in capital	36,752			25,337
Treasury stock, at cost (14,555 and 14,009 shares held in treasury)	(357,569		)	(256,363		)
Accumulated other comprehensive income, net of tax	(9		)	(5		)
Retained earnings	397,947			296,797
Total stockholders’ equity	77,676			66,321
Total liabilities and stockholders’ equity	$	1,191,816		$	1,063,695

See accompanying notes.

Insperity F-5 2018 Form 10-K

CONSOLIDATED FINANCIAL STATEMENTS

INSPERITY, INC.

CONSOLIDATED STATEMENTS OF OPERATIONS

	Year Ended December 31,
(in thousands, except per share amounts)	2018			2017			2016
Revenues(1)	$	3,828,549		$	3,300,223		$	2,941,347
Payroll taxes, benefits and workers’ compensation costs	3,146,640			2,727,492			2,449,737
Gross profit	681,909			572,731			491,610
Salaries, wages and payroll taxes	301,027			259,531			229,589
Stock-based compensation	20,425			24,345			16,643
Commissions	28,957			22,773			19,288
Advertising	18,554			16,686			16,447
General and administrative expenses	111,068			101,273			86,693
Depreciation and amortization	22,842			18,182			16,644
Total operating expenses	502,873			442,790			385,304
Operating income	179,036			129,941			106,306
Other income (expense):
Interest income	7,992			3,413			1,267
Interest expense	(4,668		)	(3,213		)	(2,396		)
Income before income tax expense	182,360			130,141			105,177
Income tax expense	46,947			45,739			39,186
Net income	$	135,413		$	84,402		$	65,991
Less distributed and undistributed earnings allocated to participating securities	(1,875		)	(1,517		)	(1,496		)
Net income allocated to common shares	$	133,538		$	82,885		$	64,495
Net income per share of common stock
Basic	$	3.24		$	2.02		$	1.55
Diluted	$	3.22		$	2.01		$	1.54

____________________________________

⁽¹⁾  Revenues are comprised of gross billings less worksite employee (“WSEE”) payroll costs as follows:

	Year ended December 31,
(in thousands)	2018		2017		2016
Gross billings	$	23,830,731	$	20,173,812	$	17,932,857
Less: WSEE payroll cost	20,002,182		16,873,589		14,991,510
Revenues	$	3,828,549	$	3,300,223	$	2,941,347

See accompanying notes.

Insperity F-6 2018 Form 10-K

CONSOLIDATED FINANCIAL STATEMENTS

INSPERITY, INC.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

	Year Ended December 31,
(in thousands)	2018			2017			2016
Net income	$	135,413		$	84,402		$	65,991
Other comprehensive loss:
Unrealized loss on available-for-sale securities, net of tax	(4		)	(2		)	(3		)
Comprehensive income	$	135,409		$	84,400		$	65,988

See accompanying notes.

Insperity F-7 2018 Form 10-K

CONSOLIDATED FINANCIAL STATEMENTS

INSPERITY, INC.

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(in thousands)	Common Stock Issued					Additional Paid In Capital			Treasury Stock			Accumulated Other Comprehensive Income (Loss)			Retained Earnings			Total
	Shares		Amount
Balance at December 31, 2015	61,517		$	617		$	144,392		$	(205,325	)	$	—		$	232,771		$	172,455
Purchase of treasury stock, at cost	—		—			—			(31,669		)	—			—			(31,669		)
Repurchase of common stock	(6,028	)	(62		)	(144,201		)	—			—			—			(144,263		)
Exercise of stock options	—		—			(27		)	625			—			—			598
Stock-based compensation expense	—		—			8,156			8,487			—			—			16,643
Other	—		—			642			730			—			—			1,372
Dividends paid	—		—			—			—			—			(20,599		)	(20,599		)
Unrealized loss on marketable securities, net of tax	—		—			—			—			(3		)	—			(3		)
Net income	—		—			—			—			—			65,991			65,991
Balance at December 31, 2016	55,489		$	555		$	8,962		$	(227,152	)	$	(3	)	$	278,163		$	60,525
Purchase of treasury stock, at cost	—		—			—			(38,735		)	—			—			(38,735		)
Stock-based compensation expense	—		—			15,508			8,837			—			—			24,345
Other	—		—			867			687			—			—			1,554
Dividends paid	—		—			—			—			—			(65,768		)	(65,768		)
Unrealized loss on marketable securities, net of tax	—		—			—			—			(2		)	—			(2		)
Net income	—		—			—			—			—			84,402			84,402
Balance at December 31, 2017	55,489		$	555		$	25,337		$	(256,363	)	$	(5	)	$	296,797		$	66,321
Purchase of treasury stock, at cost	—		—			—			(113,327		)	—			—			(113,327		)
Stock-based compensation expense	—		—			9,696			11,584			—			(855		)	20,425
Other	—		—			1,719			537			—			—			2,256
Dividends paid	—		—			—			—			—			(33,408		)	(33,408		)
Unrealized loss on marketable securities, net of tax	—		—			—			—			(4		)	—			(4		)
Net income	—		—			—			—			—			135,413			135,413
Balance at December 31, 2018	55,489		$	555		$	36,752		$	(357,569	)	$	(9	)	$	397,947		$	77,676

See accompanying notes.

Insperity F-8 2018 Form 10-K

CONSOLIDATED FINANCIAL STATEMENTS

INSPERITY, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS

	Year Ended December 31,
(in thousands)	2018			2017			2016
Cash flows from operating activities
Net income	$	135,413		$	84,402		$	65,991
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	22,842			18,182			16,644
Amortization of marketable securities	137			80			90
Stock-based compensation	20,425			24,345			16,643
Deferred income taxes	(4,533		)	9,742			2,951
Changes in operating assets and liabilities:
Accounts receivable	(66,642		)	(63,697		)	(69,619		)
Prepaid insurance	2,371			4,259			(7,624		)
Other current assets	(730		)	(7,465		)	(2,391		)
Other assets	(2,005		)	(2,496		)	(1,465		)
Accounts payable	4,175			2,258			(1,192		)
Payroll taxes and other payroll deductions payable	(42,081		)	55,481			42,373
Accrued worksite employee payroll expense	62,577			52,188			53,297
Accrued health insurance costs	9,078			(285		)	12,717
Accrued workers’ compensation costs	23,763			23,945			21,723
Accrued corporate payroll, commissions and other accrued liabilities	8,941			17,138			3,150
Income taxes payable/receivable	10,749			(4,875		)	(7,920		)
Total adjustments	49,067			128,800			79,377
Net cash provided by operating activities	184,480			213,202			145,368
Cash flows from investing activities
Marketable securities:
Purchases	(87,887		)	(1,752		)	(1,049		)
Proceeds from maturities	12,625			1,561			1,715
Proceeds from dispositions	16,299			—			7,268
Property and equipment:
Purchases	(35,328		)	(33,337		)	(33,994		)
Proceeds from dispositions	151			278			43
Net cash used in investing activities	(94,140		)	(33,250		)	(26,017		)

Insperity F-9 2018 Form 10-K

CONSOLIDATED FINANCIAL STATEMENTS

INSPERITY, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS (Continued)

	Year ended December 31,
(in thousands)	2018			2017			2016
Cash flows from financing activities
Purchase of treasury stock	$	(113,327	)	$	(38,735	)	$	(31,669	)
Repurchase of common stock	—			—			(144,263		)
Dividends paid	(33,408		)	(65,768		)	(20,599		)
Borrowings under long-term debt agreement	40,000			—			124,400
Principal repayments	—			—			(20,000		)
Proceeds from the exercise of stock options	—			—			598
Other	2,257			1,554			1,373
Net cash used in financing activities	(104,478		)	(102,949		)	(90,160		)
Net increase (decrease) in cash and cash equivalents	(14,138		)	77,003			29,191
Cash, cash equivalents and restricted cash at beginning of year	549,612			472,609			443,418
Cash, cash equivalents and restricted cash at end of year	$	535,474		$	549,612		$	472,609
Supplemental schedule of cash, cash equivalents and restricted cash
Cash and cash equivalents	$	354,260		$	286,034		$	269,538
Restricted cash	41,137			42,637			37,418
Deposits - workers’ compensation	154,215			143,938			136,462
Cash, cash equivalents and restricted cash beginning of year	$	549,612		$	472,609		$	443,418
Supplemental schedule of cash, cash equivalents and restricted cash
Cash and cash equivalents	$	326,773		$	354,260		$	286,034
Restricted cash	42,227			41,137			42,637
Deposits - workers’ compensation	166,474			154,215			143,938
Cash, cash equivalents and restricted cash end of year	$	535,474		$	549,612		$	472,609
Supplemental disclosures of cash flow information
Income taxes, net	$	40,730		$	40,872		$	44,148
Interest expense	$	4,668		$	3,213		$	2,396

See accompanying notes.

Insperity F-10 2018 Form 10-K

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1. Accounting Policies

Description of Business

Insperity, Inc. (“Insperity” or “we”, “our”, and “us”) provides an array of human resources (“HR”) and business solutions designed to help improve business performance. Since our formation in 1986, we have evolved from being solely a professional employer organization (“PEO”), an industry we pioneered, to our current position as a comprehensive business performance solutions provider. We were organized as a corporation in 1986 and have provided PEO services since inception.

Our most comprehensive HR services offerings are provided through our Workforce Optimization^® and Workforce Synchronization^TM solutions (together, our “PEO HR Outsourcing solutions”), which encompass a broad range of human resources functions, including payroll and employment administration, employee benefits, workers’ compensation, government compliance, performance management and training and development services, along with our cloud-based human capital management platform, Insperity Premier^TM.

In addition to our PEO HR Outsourcing solutions, we also offer a comprehensive traditional payroll and human capital management solution, known as Workforce Acceleration. We also offer a number of other business performance solutions, including Time and Attendance, Performance Management, Organizational Planning, Recruiting Services, Employment Screening, Expense Management, Retirement Services and Insurance Services, many of which are offered via desktop applications and cloud-based delivery models. These other products or services are offered separately or with our other solutions.

We provide our PEO HR Outsourcing solutions by entering into a co-employment relationship with our clients, under which Insperity and its clients each take responsibility for certain portions of the employer-employee relationship. Insperity and its clients designate each party’s responsibilities through its Client Service Agreement (“CSA”), under which Insperity becomes an employer of the employees who work at the client’s location (“WSEE”) for most administrative and regulatory purposes.

As a co-employer of its WSEEs, we assume many of the rights and obligations associated with being an employer. We enter into an employment agreement with each WSEE, thereby maintaining a variety of employer rights, including the right to hire or terminate employees, the right to evaluate employee qualifications or performance, and the right to establish employee compensation levels. Typically, Insperity only exercises these rights in consultation with its clients or when necessary to ensure regulatory compliance. The responsibilities associated with our role as employer include the following obligations with regard to our WSEEs: (1) to compensate its WSEEs through wages and salaries; (2) to pay the employer portion of payroll-related taxes; (3) to withhold and remit (where applicable) the employee portion of payroll-related taxes; (4) to provide employee benefit programs; and (5) to provide workers’ compensation insurance coverage.

In addition to our assumption of employer status for our WSEEs, our PEO HR Outsourcing solutions also include other human resources functions for our clients to support the effective and efficient use of personnel in their business operations. To provide these functions, we maintain a significant staff of professionals trained in a wide variety of human resources functions, including employee training, employee recruiting, employee performance management, employee compensation and employer liability management. These professionals interact and consult with clients on a daily basis to help identify each client’s service requirements and to ensure that we are providing appropriate and timely personnel management services.

Revenue and Direct Cost Recognition

On January 1, 2018, we adopted Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers (Topic 606) using the modified retrospective approach. Under this method, the guidance is applied only to the most current period presented in the financial statements. ASU No. 2014-09 outlines a single comprehensive revenue recognition model for revenue arising from contracts with customers and superseded most of the previous revenue recognition guidance, including industry-specific guidance. Under ASU No. 2014-09, an entity recognizes revenue for the transfer of promised goods or services to customers in an amount that reflects the consideration for which the entity expects to be entitled in exchange for those goods or services. Our revenue recognition policies remained substantially

Insperity F-11 2018 Form 10-K

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

unchanged as a result of the adoption of ASU No. 2014-09 and we did not have any significant changes in our business processes or systems.

We enter into contracts with our customers for human resources services based on a stated rate and price in the contract. Our contracts generally have a term of 12 months, but are cancellable at any time by either party with 30-days’ notice. Our performance obligations are satisfied as services are rendered each month. The term between invoicing and when our performance obligations are satisfied is not significant. Payment terms are typically due concurrently with the invoicing of our PEO services. We do not have significant financing components or significant payment terms.

Our revenue is generally recognized ratably over the payroll period as WSEEs perform their service at the client worksite. Customers are invoiced concurrently with each periodic payroll of its WSEEs. Revenues that have been recognized but not invoiced represent unbilled accounts receivable included in accounts receivable, net on our Consolidated Balance Sheets.

Pursuant to the practical expedients provided under ASU No 2014-09, we expense sales commissions when incurred because the terms of our contracts are cancellable by either party with a 30-day notice. These costs are recorded in commissions in our Consolidated Statements of Operations.

Our revenue for our PEO HR Outsourcing solutions by geographic region and for our other products and services offerings are as follows:

	Year Ended December 31,
(in thousands)	2018		2017		2016
Northeast	$	996,541	$	854,629	$	750,748
Southeast	447,584		379,874		318,185
Central	637,779		543,486		467,297
Southwest	895,243		767,207		689,334
West	797,942		702,619		664,308
	3,775,089		3,247,815		2,889,872
Other revenue	53,460		52,408		51,475
Total revenue	$	3,828,549	$	3,300,223	$	2,941,347

Our PEO HR Outsourcing solutions revenues are primarily derived from our gross billings, which are based on (1) the payroll cost of its WSEEs; and (2) a markup computed as a percentage of the payroll cost. The gross billings are invoiced concurrently with each periodic payroll of its WSEEs. Revenues, which exclude the payroll cost component of gross billings and therefore consist solely of markup, are recognized ratably over the payroll period as WSEEs perform their service at the client worksite.

In determining the pricing of the markup component of our gross billings, we take into consideration our estimates of the costs directly associated with our WSEEs, including payroll taxes, benefits and workers’ compensation costs, plus an acceptable gross profit margin. As a result, our operating results are significantly impacted by our ability to accurately estimate, control and manage our direct costs relative to the revenues derived from the markup component of our gross billings.

Consistent with our revenue recognition policy, our direct costs do not include the payroll cost of our WSEEs. Our direct costs associated with our revenue generating activities are primarily comprised of all other costs related to our WSEEs, such as the employer portion of payroll-related taxes, employee benefit plan premiums and workers’ compensation insurance costs.

Segment Reporting

We operate one reportable segment under ASC 280, Segment Reporting.

Insperity F-12 2018 Form 10-K

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Principles of Consolidation

The Consolidated Financial Statements include the accounts of Insperity, Inc. and its wholly owned subsidiaries. Intercompany accounts and transactions have been eliminated in consolidation.

Use of Estimates

The preparation of financial statements in conformity with United States Generally Accepted Accounting Principles requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.

Concentrations of Credit Risk

Financial instruments that could potentially subject us to concentration of credit risk include accounts receivable and marketable securities.

Cash, Cash Equivalents and Marketable Securities

We invest our excess cash in federal government and municipal-based money market funds and debt instruments of U.S. municipalities. All highly liquid investments with stated maturities of three months or less from date of purchase are classified as cash equivalents. Liquid investments with stated maturities of greater than three months are classified as marketable securities in current assets.

We account for marketable securities in accordance with ASC 320, Investments – Debt and Equity Securities. We determine the appropriate classification of all marketable securities as held-to-maturity, available-for-sale or trading at the time ofpurchase, and re-evaluate such classification as of each balance sheet date. At December 31, 2018 and 2017, all of our investments in marketable securities were classified as available-for-sale, and as a result, were reported at fair value. Unrealized gains and losses are reported as a component of accumulated other comprehensive income (loss) in stockholders’ equity. The amortized cost of debt securities is adjusted for amortization of premiums and accretion of discounts from the date of purchase to maturity. Such amortization is included in interest income as an addition to or deduction from the coupon interest earned on the investments. We use the specific identification method of determining the cost basis in computing realized gains and losses on the sale of our available-for-sale securities. Realized gains and losses are included in other income.

Insperity F-13 2018 Form 10-K

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Property and Equipment

Property and equipment are recorded at cost and are depreciated over the estimated useful lives of the related assets using the straight-line method.

Property and equipment, net consisted of the following:

(in thousands)	December 31, 2018			December 31, 2017
Land	$	6,215		$	6,215
Buildings and improvements	112,308			95,615
Computer hardware and software	115,259			105,060
Software development costs	71,332			60,568
Furniture, fixtures and other	45,694			42,891
	350,808			310,349
Accumulated depreciation and amortization	(233,595		)	(214,690		)
Total property and equipment, net	$	117,213		$	95,659

The estimated useful lives of property and equipment for purposes of computing depreciation are as follows:

	Useful Life
Buildings and improvements	5-30 years
Computer hardware and software	2-5 years
Software development costs	3-5 years
Furniture, fixtures and other	5-7 years

Software development costs relate primarily to software code development, systems integration and testing of our proprietary professional employer information systems and are accounted for in accordance with ASC 350-40, Internal Use Software. Capitalized software development costs are amortized using the straight-line method over the estimated useful lives of the software, generally three years. We recognized $6.0 million, $4.1 million and $3.0 million in amortization of capitalized computer software costs in 2018, 2017 and 2016, respectively. Unamortized software development costs were $19.6 million and $14.9 million in 2018 and 2017, respectively.

We account for our software products in accordance with ASC 985-20, Costs of Software to be Sold. This Topic establishes standards of financial accounting and reporting for the costs of computer software to be sold, leased, or otherwise marketed as a separate product or as part of a product or process, whether internally developed and produced or purchased.

We periodically evaluate our long-lived assets for impairment in accordance with ASC 360-10, Property, Plant, and Equipment. ASC 360-10 requires that an impairment loss be recognized for assets to be disposed of or held-for-use when the carrying amount of an asset is deemed to not be recoverable. If events or circumstances were to indicate that any of our long-lived assets might be impaired, we would assess recoverability based on the estimated undiscounted future cash flows to be generated from the applicable asset. In addition, we may record an impairment loss to the extent that the carrying value of the asset exceeded the fair value of the asset. Fair value is generally determined using an estimate of discounted future net cash flows from operating activities or upon disposal of the asset.

Goodwill and Other Intangible Assets

Our goodwill is not amortized, but is tested for impairment on an annual basis or when there is an indication that there has been a potential decline in the fair value of a reporting unit. Annually, we perform a qualitative analysis to determine if it is more likely than not that the fair value has declined below its carrying value. This analysis considers various qualitative factors. Due to the nature of our business, all of our goodwill is associated with one reporting unit. We perform our annual impairment testing during the fourth quarter. Based on the results of our analysis, no impairment loss was recognized in 2018, 2017 or 2016.

Insperity F-14 2018 Form 10-K

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

At December 31, 2018 and 2017, we had an aggregate carrying amount of goodwill acquired of $21.2 million, which has been reduced by cumulative impairment charges of $8.5 million. Accordingly our goodwill balance at December 31, 2018 and 2017 was $12.7 million.

Health Insurance Costs

We provide group health insurance coverage to our WSEEs through a national network of carriers including UnitedHealthcare (“United”), UnitedHealthcare of California, Kaiser Permanente, Blue Shield of California, HMSA BlueCross BlueShield of Hawaii and Tufts, all of which provide fully insured policies or service contracts.

The policy with United provides the majority of our health insurance coverage. As a result of certain contractual terms, we have accounted for this plan since its inception using a partially self-funded insurance accounting model. Accordingly, we record the cost of the United portion of the plan, including an estimate of the incurred claims, taxes and administrative fees (collectively the “Plan Costs”) as benefits expense, a component of direct costs, in the Consolidated Statements of Operations. The estimated incurred claims are based upon: (1) the level of claims processed during each quarter; (2) estimated completion rates based upon recent claim development patterns under the plan; and (3) the number of participants in the plan, including both active and COBRA enrollees. Each reporting period, changes in the estimated ultimate costs resulting from claim trends, plan design and migration, participant demographics and other factors are incorporated into the benefits costs.

Additionally, since the plan’s inception, under the terms of the contract, United establishes cash funding rates 90 days in advance of the beginning of a reporting quarter. If the Plan Costs for a reporting quarter are greater than the premiums paid and owed to United, a deficit in the plan would be incurred and a liability for the excess costs would be accrued in our Consolidated Balance Sheets. On the other hand, if the Plan Costs for the reporting quarter are less than the premiums paid and owed to United, a surplus in the plan would be incurred and we would record an asset for the excess premiums in our Consolidated Balance Sheets. The terms of the arrangement require us to maintain an accumulated cash surplus in the plan of $9.0 million, which is reported as long-term prepaid insurance. In addition, United requires a deposit equal to approximately one day of claims funding activity, which was $6.0 million as of December 31, 2018, and is reported as a long-term asset. As of December 31, 2018, Plan Costs were more than the net premiums paid and owed to United by $6.3 million. As this amount is less than the agreed-upon $9.0 million surplus maintenance level, the $15.3 million difference is also included in accrued health insurance costs, a current liability, in our Consolidated Balance Sheets. The premiums, including the additional quarterly premiums, owed to United at December 31, 2018, were $15.2 million, which is included in accrued health insurance costs, a current liability in our Consolidated Balance Sheets. Our benefits costs incurred included a reduction of $1.3 million in 2018, an increase of $1.2 million in 2017 and an increase of $5.1 million in 2016 for changes in estimated run-off related to prior periods.

Workers’ Compensation Costs

Our workers’ compensation coverage for our WSEEs in our PEO HR Outsourcing solutions has been provided through an arrangement with the Chubb Group of Insurance Companies or its predecessors (the “Chubb Program”) since 2007. The Chubb Program is fully insured in that Chubb has the responsibility to pay all claims incurred under the policy regardless of whether we satisfy our responsibilities. Under the Chubb Program, we have financial responsibility to Chubb for the first $1 million layer of claims per occurrence and, for claims over $1 million, up to a maximum aggregate amount of $6 million per policy year for claims that exceed $1 million. Chubb bears the financial responsibility for all claims in excess of these levels.

Because we bear the financial responsibility for claims up to the levels noted above, such claims, which are the primary component of our workers’ compensation costs, are recorded in the period incurred. Workers’ compensation insurance includes ongoing health care and indemnity coverage whereby claims are paid over numerous years following the date of injury. Accordingly, the accrual of related incurred costs in each reporting period includes estimates, which take into account the ongoing development of claims and therefore requires a significant level of judgment.

We utilize a third-party actuary to estimate our loss development rate, which is primarily based upon the nature of WSEEs’ job responsibilities, the location of WSEEs, the historical frequency and severity of workers’ compensation claims, and an estimate of future cost trends. Each reporting period, changes in the actuarial assumptions resulting from changes in actual claims experience and other trends are incorporated into our workers’ compensation claims cost estimates. During the years ended December 31, 2018, 2017 and 2016, we reduced accrued workers’ compensation costs by $18.8 million, $16.3 million and $10.9 million, respectively, for changes in estimated losses related to prior reporting periods. Workers’

Insperity F-15 2018 Form 10-K

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

compensation cost estimates are discounted to present value at a rate based upon the U.S. Treasury rates that correspond with the weighted average estimated claim payout period (the average discount rate was 2.6% in 2018 and 1.6% in 2017) are accreted over the estimated claim payment period and included as a component of direct costs in our Consolidated Statements of Operations.

The following table provides the activity and balances related to incurred but not paid workers’ compensation claims:

	Year Ended December 31,
(in thousands)	2018			2017
Beginning balance	$	207,630		$	183,928
Accrued claims	72,066			68,194
Present value discount	(7,829		)	(4,308		)
Paid claims	(42,228		)	(40,184		)
Ending balance	$	229,639		$	207,630
Current portion of accrued claims	$	42,227		$	41,137
Long-term portion of accrued claims	187,412			166,493
Total accrued claims	$	229,639		$	207,630

The current portion of accrued workers’ compensation costs at December 31, 2018 and 2017 includes $3.6 million and $1.8 million, respectively, of workers’ compensation administrative fees.

The undiscounted accrued workers’ compensation costs were $247.4 million as of December 31, 2018 and $219.9 million as of December 31, 2017.

At the beginning of each policy period, the workers’ compensation insurance carrier establishes monthly funding requirements comprised of premium costs and funds to be set aside for payment of future claims (“claim funds”). The level of claim funds is primarily based upon anticipated WSEE payroll levels and expected workers’ compensation loss rates, as determined by the insurance carrier. Monies funded into the program for incurred claims expected to be paid within one year are recorded as restricted cash, a short-term asset, while the remainder of claim funds are included in deposits, a long-term asset in our Consolidated Balance Sheets. In 2018, we received $19.4 million for the return of excess claim funds related to the workers’ compensation program, which decreased deposits. As of December 31, 2018, we had restricted cash of $42.2 million and deposits of $166.5 million.

Our estimate of incurred claim costs expected to be paid within one year is included in short-term liabilities, while our estimate of incurred claim costs expected to be paid beyond one year is included in noncurrent liabilities on our Consolidated Balance Sheets.

Stock-Based Compensation

At December 31, 2018, we have one stock-based employee compensation plan under which we may issue awards. We account for this plan under the recognition and measurement principles of ASC 718, Compensation – Stock Compensation, which requires all share-based payments to employees, including grants of employee stock options, to be recognized in the income statement based on their fair values.

We generally make annual grants of restricted and unrestricted stock under our stock-based incentive compensation plan to our non-employee directors, officers and other management. Restricted stock grants to officers and other management generally vest over a period of three years from the date of grant. Shares of restricted stock are valued based on the fair value on date of grant and the associated expense, net of estimated forfeitures, is recognized over the vesting period. Commencing in 2017, stock grants issued to non-employee directors upon their initial appointment to the board are 100% vested on the grant date. Annual stock grants issued to non-employee directors are 100% vested on the grant date.

Our Insperity Long-Term Incentive Program (the “LTIP”) provides for performance based long-term compensation awards in the form of performance units to certain employees based on the achievement of pre-established performance goals. Each performance unit represents the right to receive one common share at a future date based on our performance

Insperity F-16 2018 Form 10-K

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

against certain targets. Performance units have a vesting schedule of three years. Commencing in 2016, a portion of the LTIP grant to employees was considered a market-based performance award that vests at the end of a three-year period assuming continued employment and achievement of market-based performance goals. The fair value of each performance unit is the market price of our common stock on the date of grant. The fair value of each market-based performance unit was determined through use of the Monte Carlo simulation method. The compensation expense for such awards is recognized on a straight line basis over the vesting term. Over the performance period the number of shares expected to be issued is adjusted upward or downward based on the probability of achievement of the performance target.

Company-Sponsored 401(k) Retirement Plans

Under our 401(k) retirement plan for corporate employees (the “Corporate Plan”), we matched 100% of eligible corporate employees’ contributions, up to 6% of the employees’ eligible compensation in 2018, 2017 and 2016. Matching contributions under the Corporate Plan are immediately vested. During 2018, 2017 and 2016, we made matching contributions on behalf of corporate employees to the Corporate Plan of $10.3 million, $8.7 million and $8.0 million, respectively, and is included in salaries, wages and payroll taxes in our Consolidated Statements of Operations.

Under our separate 401(k) retirement plan for WSEEs (the “Worksite Employee Plan”), the match percentage for WSEEs ranges from 0% to 6%, as determined by each client company. Matching contributions under the Worksite Employee Plan are immediately vested. During 2018, 2017 and 2016, we made matching contributions on behalf of WSEEs to the Worksite Employee Plan of $165.5 million, $129.0 million and $108.3 million, respectively.

Advertising

We expense all advertising costs as incurred.

Income Taxes

We use the liability method in accounting for income taxes. Under this method, deferred tax assets and liabilities are determined based on differences between financial reporting and income tax carrying amounts of assets and liabilities and are measured using the enacted tax rates and laws in effect when the differences are expected to reverse. On December 22, 2017, the Tax Cuts and Jobs Act (the “2017 Tax Reform Act”) was signed into law. The 2017 Tax Reform Act significantly changes U.S. corporate income tax laws by, among other things, reducing the U.S. corporate income tax rate to 21% beginning in 2018. Please read Note 7, “Income Taxes,” for additional information.

Reclassifications

Certain prior year amounts have been reclassified to conform to the 2018 presentation.

New Accounting Pronouncements

In February 2016, the FASB issued ASU No. 2016-02, Leases. The new standard requires recognition of lease assets and lease liabilities for leases previously classified as operating leases. The guidance is effective for fiscal years beginning after December 15, 2018. While our technical analysis is ongoing, we do not expect the new standard to have a material impact to our Consolidated Statements of Operations. We expect the lease commitments discussed in Note 11, “Leases” to appear on our Consolidated Balance Sheets in the form of a lease asset and a lease liability. Such amounts are based on the present value of such commitments using our incremental borrowing rate. We plan to utilize the transition package of practical expedients permitted within the new standard, which among other things, allows us to carryforward the historical lease classification. We do not plan to elect the practical expedient to use hindsight in determining the lease term and in assessing impairment of right-of-use assets.

Insperity F-17 2018 Form 10-K

CONSOLIDATED FINANCIAL STATEMENTS

2. Cash, Cash Equivalents and Marketable Securities

The following table summarizes our investments in cash equivalents and marketable securities held by investment managers and overnight investments:

	December 31,
	2018								2017
(in thousands)	Cash & Cash Equivalents			Marketable Securities		Total			Cash & Cash Equivalents			Marketable Securities		Total
Overnight holdings	$	311,158		$	—	$	311,158		$	338,112		$	—	$	338,112
Investments holdings	16,711			60,781		77,492			22,634			1,960		24,594
Cash in demand accounts	33,207			—		33,207			26,700			—		26,700
Outstanding checks	(34,303		)	—		(34,303		)	(33,186		)	—		(33,186		)
Total	$	326,773		$	60,781	$	387,554		$	354,260		$	1,960	$	356,220

Our cash and overnight holdings fluctuate based on the timing of the client’s payroll processing cycle. Included in the cash balance as of December 31, 2018 and December 31, 2017, are $224.5 million and $271.5 million, respectively, in withholdings associated with federal and state income taxes, employment taxes and other payroll deductions, as well as $34.2 million and $23.6 million, respectively, in client prepayments.

3. Fair Value Measurements

We account for our financial assets in accordance with ASC 820, Fair Value Measurement. This standard defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. The fair value measurement disclosures are grouped into three levels based on valuation factors:

• Level 1 - quoted prices in active markets using identical assets

• Level 2 - significant other observable inputs, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other observable inputs

• Level 3 - significant unobservable inputs

Fair Value of Instruments Measured and Recognized at Fair Value

The following tables summarize the levels of fair value measurements of our financial assets:

	December 31, 2018						December 31, 2017
(in thousands)	Total		Level 1		Level 2		Total		Level 1		Level 2
Money market funds	$	327,869	$	327,869	$	—	$	360,746	$	360,746	$	—
U.S. Treasury bills	50,147		—		50,147		—		—		—
Municipal bonds	10,634		—		10,634		1,960		—		1,960
Total	$	388,650	$	327,869	$	60,781	$	362,706	$	360,746	$	1,960

The municipal bond securities valued as Level 2 investments are primarily pre-refunded municipal bonds that are secured by escrow funds containing U.S. Government securities. Our valuation techniques used to measure fair value for these securities during the period consisted primarily of third-party pricing services that utilized actual market data such as trades of comparable bond issues, broker/dealer quotations for the same or similar investments in active markets and other observable inputs.

Insperity F-18 2018 Form 10-K

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

The following is a summary of our available-for-sale marketable securities:

(in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
December 31, 2018
U.S. Treasury bills	$	50,150	$	—	$	(3	)	$	50,147
Municipal bonds	10,640		1		(7		)	10,634
December 31, 2017
U.S. Treasury bills	$	—	$	—	$	—		$	—
Municipal bonds	1,965		—		(5		)	1,960

As of December 31, 2018, the contractual maturities of all marketable securities in our portfolio were less than one year.

Fair Value of Other Financial Instruments

The carrying amounts of cash, cash equivalents, restricted cash, accounts receivable, deposits and accounts payable approximate their fair values due to the short-term maturities of these instruments.

At December 31, 2018, the carrying value of our borrowings under our revolving credit facility approximates fair value and was classified as Level 2 in the fair value hierarchy. Please read Note 6, "Long-Term Debt," for additional information.

4. Accounts Receivable

Accounts receivable, net consisted of the following:

	December 31,
(in thousands)	2018		2017
Trade	$	10,015	$	12,292
Unbilled	385,567		318,431
Other	5,041		3,258
Accounts receivable, net	$	400,623	$	333,981

Our accounts receivable is primarily composed of trade receivables and unbilled receivables. Our trade receivables, which represent outstanding gross billings to clients, are reported net of allowance for doubtful accounts of $1.0 million and $0.6 million as of December 31, 2018 and 2017, respectively. We establish an allowance for doubtful accounts based on management’s assessment of the collectability of specific accounts and by making a general provision for other potentially uncollectible amounts.

We make an accrual at the end of each accounting period for our obligations associated with the earned but unpaid wages of our WSEEs and for the accrued gross billings associated with such wages. These accruals are included in accrued WSEE payroll cost and unbilled accounts receivable; however, these amounts are presented net in the Consolidated Statements of Operations. We generally require clients to pay invoices for service fees no later than one day prior to the applicable payroll date. As such, we generally do not require collateral. Client prepayments directly attributable to unbilled accounts receivable have been netted against such receivables as the gross billings have been earned and the payroll cost has been incurred, thus we have the legal right of offset for these amounts. Unbilled accounts receivable consisted of the following:

Insperity F-19 2018 Form 10-K

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

	December 31,
(in thousands)	2018			2017
Accrued worksite employee payroll cost	$	329,979		$	267,402
Unbilled revenues	89,765			74,632
Customer prepayments	(34,177		)	(23,603		)
Unbilled accounts receivable	$	385,567		$	318,431

5. Deposits

Deposits consisted of the following:

	December 31,
(in thousands)	2018		2017
Deposits – health insurance	$	6,200	$	5,300
Deposits – workers’ compensation	166,474		154,215
Deposits	$	172,674	$	159,515

The contractual arrangement with United for health insurance coverage requires us to maintain an accumulated cash surplus in the plan of $9.0 million, which is reported as long-term prepaid health insurance. Please read Note 1, “Accounting Policies,” for a discussion of our accounting policies for health insurance costs and workers’ compensation costs.

6. Long-Term Debt

We have a revolving credit facility which is available for working capital and general corporate purposes, including acquisitions, stock repurchases and issuances of letters of credit. In February 2018, the revolving credit facility was increased from $200 million to $350 million and the expiration date was extended from February 2020 to February 2023 (the “Facility”). Borrowings may be increased to $400 million based on the terms and subject to the conditions set forth in the agreement relating to the Facility (the “Credit Agreement”). Our obligations under the Facility are secured by 65% of the stock of our captive insurance subsidiary and are guaranteed by all of our domestic subsidiaries. In addition, as of December 31, 2018, we had an outstanding $1.0 million letter of credit issued under the Facility. As of December 31, 2018, our outstanding balance on the Facility was $144.4 million.

The Facility matures on February 6, 2023. Borrowings under the Facility bear interest at an alternate base rate or LIBOR, at our option, plus an applicable margin. Depending on our leverage ratio, the applicable margin varies (1) in the case of LIBOR loans, from 1.50% to 2.25% and (2) in the case of alternate base rate loans, from 0.00% to 0.50%. The alternate base rate is the highest of (1) the prime rate most recently published in The Wall Street Journal, (2) the federal funds rate plus 0.50% and (3) the 30-day LIBOR rate plus 2.00%. We also pay an unused commitment fee on the average daily unused portion of the Facility at a rate of 0.25%. The average interest rate during 2018 was 3.5%. Interest expense and unused commitment fees are recorded in other income (expense).

The Facility contains both affirmative and negative covenants that we believe are customary for arrangements of this nature. Covenants include, but are not limited to, limitations on our ability to incur additional indebtedness, sell material assets, retire, redeem or otherwise reacquire our capital stock, acquire the capital stock or assets of another business, make investments and pay dividends. In addition, the Credit Agreement requires us to comply with financial covenants limiting our total funded debt, minimum interest coverage ratio and maximum leverage ratio. In November 2017 and December 2014, the Credit Agreement was amended to modify the interest coverage ratio covenant to exclude the impact of special dividends paid of $41.7 million and $50.7 million, respectively. We were in compliance with all financial covenants under the Credit Agreement at December 31, 2018.

Insperity F-20 2018 Form 10-K

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

7. Income Taxes

Deferred taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities used for financial reporting purposes and the amounts used for income tax purposes. On December 22, 2017, the Tax Cuts and Jobs Act (the “2017 Tax Reform Act”) was signed into law. The 2017 Tax Reform Act significantly changed U.S. corporate income tax laws by, among other things, reducing the U.S. corporate income tax rate from 35% to 21% beginning in 2018. As a result, we remeasured our deferred tax assets at the new lower corporate income tax rate and recorded a non-cash tax charge of $2.5 million in 2017. During 2018, we finalized certain tax positions when we filed our 2017 federal tax return, and determined no further adjustments were required to our net deferred tax asset balance of $8.8 million as of December 31, 2018.

Significant components of the net deferred tax assets as reflected on the Consolidated Balance Sheets are as follows:

	December 31,
(in thousands)	2018			2017
Deferred tax liabilities
Prepaid assets	$	(3,306	)	$	(3,957	)
Depreciation	(3,918		)	(2,021		)
Software development costs	(4,950		)	(3,732		)
Intangibles	(474		)	—
Total deferred tax liabilities	(12,648		)	(9,710		)
Deferred tax assets
Accrued incentive compensation	8,612			3,510
Net operating loss carryforward	709			774
Workers’ compensation accruals	4,739			4,586
Accrued rent	918			676
Stock-based compensation	6,183			4,233
Minority investment impairment	676			667
Other	305			216
Total deferred tax assets	22,142			14,662
Valuation allowance	(678		)	(669		)
Total net deferred tax assets	21,464			13,993
Net deferred tax assets	$	8,816		$	4,283

Insperity F-21 2018 Form 10-K

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

The components of income tax expense are as follows:

	Year Ended December 31,
(in thousands)	2018			2017		2016
Current income tax expense
Federal	$	40,347		$	30,009	$	31,045
State	11,133			5,988		5,190
Total current income tax expense	51,480			35,997		36,235
Deferred income tax (benefit) expense
Federal	(3,398		)	9,549		2,641
State	(1,135		)	193		310
Total deferred income tax (benefit) expense	(4,533		)	9,742		2,951
Total income tax expense	$	46,947		$	45,739	$	39,186

In the first quarter of 2016, we prospectively adopted ASU No. 2016-09, Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting for calendar year 2016. We recognized an income tax benefit of $2.7 million in 2018, $6.8 million in 2017 and $1.5 million in 2016 related to excess tax benefits from the vesting of long-term incentive awards, restricted stock awards and non-qualified stock options.

The reconciliation of income tax expense computed at U.S. federal statutory tax rates to the reported income tax expense from continuing operations is as follows:

	Year Ended December 31,
(in thousands)	2018			2017			2016
Expected income tax expense at 21%, 35% and 35%, respectively	$	38,296		$	45,549		$	36,812
State income taxes, net of federal benefit	7,660			4,085			3,684
Nondeductible expenses	4,831			2,649			1,669
Section 199 benefits	—			(875		)	(686		)
Equity compensation	(2,737		)	(6,218		)	(1,338		)
Research and development credit	(856		)	(634		)	(751		)
Disaster employee retention credit	—			(669		)	—
Enactment of the 2017 Tax Reform Act	—			2,559			—
Other, net	(247		)	(707		)	(204		)
Reported total income tax expense	$	46,947		$	45,739		$	39,186

At December 31, 2018, we have net operating loss carryforwards totaling $2.8 million that expire from 2023 to 2030 related to an acquisition that occurred in 2010.

We recognize interest and penalties related to uncertain tax positions in income tax expense. As of December 31, 2018, 2017 and 2016, we made no provisions for interest or penalties related to uncertain tax positions. The tax years 2015 through 2017 remain open to examination by the Internal Revenue Service of the United States. The tax years 2014 through 2017 remain open to examination by various state tax authorities.

Insperity F-22 2018 Form 10-K

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

8. Stockholders’ Equity

Two-for-One Stock Split

On December 18, 2017, we effected a two-for-one stock split in the form of a 100% stock dividend. Share and per share amounts for 2017 and 2016 presented in these financial statements have been retroactively restated to reflect this change in our capital structure.

Repurchase Program

Our Board of Directors (the “Board”) has authorized a program to repurchase shares of our outstanding common stock (“Repurchase Program”). The purchases are to be made from time to time in the open market or directly from stockholders at prevailing market prices based on market conditions or other factors. We repurchased 1,066,409 shares under the Repurchase Program during 2018. In addition, 132,021 shares were withheld during 2018 to satisfy minimum tax withholding obligations for the vesting of restricted stock awards, which are not subject to the Repurchase Program. During 2017, we repurchased 594,974 shares under the Repurchase Program and 305,828 shares were withheld to satisfy minimum tax withholding obligations for the vesting of restricted stock awards. At December 31, 2018, we were authorized to repurchase an additional 1,611,155 shares under the Repurchase Program. Shares repurchased under the Repurchase Program are recorded in treasury.

Withheld Shares

During 2018, 132,021 shares were withheld to satisfy minimum tax withholding obligations for the vesting of long-term incentive and restricted stock awards. Shares withheld to satisfy minimum tax withholding obligations for the vesting of long-term incentive and restricted stock awards are recorded in treasury.

Tender Offer for Common Stock

In December 2015, we commenced a modified Dutch auction tender offer to purchase up to $125 million in value of our common stock at a price not less than $21.75 per share and not more than $25.00 per share. In January 2016, we exercised our right to increase the size of the tender offer by up to 2.0% of our outstanding common stock. The tender offer period expired on January 7, 2016 and on January 13, 2016, we purchased 6,027,062 shares of our common stock at a per share price of $23.75 and an aggregate price of $143.1 million, excluding $1.1 million of transaction costs. The shares were immediately canceled and retired.

The tender offer was funded through borrowings of $104.4 million under the Facility and the remainder with cash on hand.

Dividends

The Board declared quarterly dividends as follows:

(amounts per share)	2018		2017
First quarter	$	0.20	$	0.125
Second quarter	0.20		0.150
Third quarter	0.20		0.150
Fourth quarter	0.20		1.150		(1)

__________________________________

⁽¹⁾  Includes a $1.00 per share special dividend.

During 2018 and 2017, we paid a total of $33.4 million and $65.8 million, respectively in dividends. The dividends paid in 2017 includes a special dividend of $41.7 million.

Preferred Stock

At December 31, 2018, 20 million shares of preferred stock were authorized. The Series A Junior Participating Preferred Stock that was previously reserved for issuance under our Share Purchase Rights Plan expired on November 13, 2017.

Insperity F-23 2018 Form 10-K

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

9. Incentive Plans

The Insperity, Inc. 2001 Incentive Plan, as amended, and the 2012 Incentive Plan, as amended, (collectively, the “Incentive Plans”) provide for options and other stock-based awards that have been and may be granted to eligible employees and non-employee directors of Insperity or its subsidiaries. The 2012 Incentive Plan is currently the only plan under which new stock-based awards may be granted. The Incentive Plans are administered by the Compensation Committee of the Board of Directors (the “Committee”). The Committee has the power to determine which eligible employees will receive awards, the timing and manner of the grant of such awards, the exercise price of stock options (which may not be less than market value on the date of grant), the number of shares and all of the terms of the awards. The Board may at any time amend or terminate the Incentive Plans. However, no amendment that would impair the rights of any participant, with respect to outstanding grants, can be made without the participant’s prior consent. Stockholder approval of amendments to the Incentive Plans is necessary only when required by applicable law or stock exchange rules. At December 31, 2018, 2,680,666 shares of common stock were available for future grants under the 2012 Incentive Plan. The 2001 Incentive Plan only has outstanding nonqualified stock options. The 2012 Incentive Plan permits stock options, including nonqualified stock options and options intended to qualify as “incentive stock options” within the meaning of Section 422 of the Internal Revenue Code, stock awards, phantom stock awards, stock appreciation rights, performance units, and other stock-based awards and cash awards, all of which may or may not be subject to the achievement of one or more performance objectives. The purpose of the Incentive Plan generally is to retain and attract persons of training, experience and ability to serve as employees of Insperity and its subsidiaries and to serve as non-employee directors of Insperity, to encourage the sense of proprietorship of such persons and to stimulate the active interest of such persons in the development and financial success of Insperity and its subsidiaries.

We also maintain the Insperity, Inc. Long-Term Incentive Program (“LTIP”) under the 2012 Incentive Plan. The LTIP provides for performance-based long-term compensation awards in the form of performance units to certain employees based on the achievement of pre-established performance goals. We granted performance units under the LTIP to our named executive officers and certain other officers in 2016, 2017 and 2018.

We recognized $20.4 million, $24.3 million and $16.6 million of compensation expense associated with the restricted stock and the LTIP awards in 2018, 2017 and 2016, respectively. Included in 2017, is $2.3 million of stock-based compensation associated with the acceleration of restricted stock awards from the first quarter of 2018 to December 2017 in order to maximize our tax deduction, which would have been limited under the 2017 Tax Reform Act. We recognized $5.3 million, $8.5 million and $6.2 million of tax benefits associated with stock-based compensation in 2018, 2017 and 2016, respectively.

Stock Option Awards

The following is a summary of stock option award activity for 2018:

	Shares (in thousands)	Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Life (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding - December 31, 2017	16	$	15.30
Granted	—	—
Exercised	—	—
Canceled	—	—
Outstanding - December 31, 2018	16	$	15.30	2.5	$	1,220
Exercisable - December 31, 2018	16	$	15.30	2.5	$	1,220

Insperity F-24 2018 Form 10-K

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Restricted Stock Awards

Restricted common shares, under equity plan accounting, are generally measured at fair value on the date of grant based on the number of shares granted, estimated forfeitures and the quoted price of the common stock. Such value is recognized as compensation expense over the corresponding vesting period, three to five years for our shares currently outstanding. The total fair value of shares vested during the years ended December 31, 2018, 2017, and 2016 was $1.2 million, $46.0 million and $16.2 million, respectively. The weighted average grant date fair value of restricted stock awards granted during the years ended December 31, 2018, 2017 and 2016 was $65.98, $42.15 and $26.33, respectively. As of December 31, 2018, unrecognized compensation expense associated with the unvested shares outstanding was $18.4 million and is expected to be recognized over a weighted average period of 22 months.

The following is a summary of restricted stock award activity for 2018:

	Shares (in thousands)		Weighted Average Grant Date Fair Value
Non-vested - December 31, 2017	343		$	35.29
Granted	290		65.98
Vested	(14	)	66.28
Canceled/Forfeited	(37	)	41.37
Non-vested - December 31, 2018	582		$	49.48

Long-Term Incentive Program Awards

Each performance unit represents the right to receive common shares at a future date based on our performance against specified targets. The ultimate number of shares issued and the related compensation cost recognized is based on a comparison of the final performance metrics to the specified targets, which can range from 0% to 200% of the targeted amounts. A performance unit may be comprised of either a performance based award or a market-based award. For performance based awards, performance units have a vesting schedule of three years and compensation expense is recognized based on the number of common shares expected to be issued and the market price per common share on the date of grant. Over the performance period, the number of shares expected to be issued is adjusted upward or downward based upon the probability of achievement of the performance targets. For market-based awards, performance units vest at the end of a three-year period assuming continued employment and achievement of market-based performance goals. The fair value of market-based performance awards was determined through the use of the Monte Carlo simulation method. The compensation expense for the LTIP awards is recognized on a straight-line basis over the vesting terms.

The following is a summary of LTIP award activity, at 100% of targeted amount, for 2018:

	Number of Performance Units (in thousands)		Weighted Average Grant Date Fair Value
Unvested at December 31, 2017	570		$	32.90
Granted	100		81.51
Vested	(196	)	26.40
Canceled	(48	)	41.90
Unvested at December 31, 2018	426		$	46.35

The determination of achievement results and corresponding vesting of the 2015 LTIP awards occurred in February 2018 resulting in the recipients receiving 371,000 shares of common stock with a fair value $24.2 million. As of December 31, 2018, we estimate that approximately 345,000, 202,000 and 176,000 shares will vest with $0.4 million, $3.4 million and $8.6 million in unamortized compensation expense related to the 2016, 2017 and 2018 LTIP grants, respectively.

Insperity F-25 2018 Form 10-K

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Employee Stock Purchase Plan

Our employee stock purchase plan (the “ESPP”) enables employees to purchase shares of Insperity stock at a 5% discount. The ESPP is a non-compensatory plan under generally accepted accounting principles of stock-based compensation. As a result, no compensation expense is recognized in conjunction with this plan. Approximately 30,000, 38,000 and 34,000 shares were issued from treasury under the ESPP during fiscal years 2018, 2017 and 2016, respectively.

10. Net Income Per Share

We utilize the two-class method to compute net income per share. The two-class method allocates a portion of net income to participating securities, which includes unvested awards of share-based payments with non-forfeitable rights to receive dividends. Net income allocated to unvested share-based payments is excluded from net income allocated to common shares. Any undistributed losses resulting from dividends exceeding net income are not allocated to participating securities. Basic net income per share is computed by dividing net income allocated to common shares by the weighted average number of common shares outstanding during the period. Diluted net income per share is computed by dividing net income allocated to common shares by the weighted average number of common shares outstanding during the period, plus the dilutive effect of outstanding stock options.

The following table summarizes the net income allocated to common shares and the basic and diluted shares used in the net income per share computations:

	Year Ended December 31,
(in thousands)	2018			2017			2016
Net income	$	135,413		$	84,402		$	65,991
Less distributed and undistributed earnings allocated to participating securities	(1,875		)	(1,517		)	(1,496		)
Net income allocated to common shares	$	133,538		$	82,885		$	64,495
Weighted average common shares outstanding	41,217			41,067			41,668
Incremental shares from assumed conversions of common stock options and LTIP awards	289			204			94
Adjusted weighted average common shares outstanding	41,506			41,271			41,762
Potentially dilutive securities not included in weighted average share calculation due to anti-dilutive effect	—			—			—

Insperity F-26 2018 Form 10-K

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

11. Leases

We lease various office facilities, equipment and vehicles under operating lease arrangements, some of which contain rent escalation clauses. Most of the leases contain purchase and/or renewal options at fair market and fair rental value, respectively. Rental expense relating to all operating leases was $15.4 million, $15.4 million and $15.0 million in 2018, 2017 and 2016, respectively. At December 31, 2018, future minimum rental payments under noncancelable operating leases are as follows:

(in thousands)	Operating Leases
2019	$	16,542
2020	16,325
2021	13,932
2022	12,791
2023	10,623
Thereafter	23,638
Total minimum lease payments	$	93,851

12. Commitments and Contingencies

We enter into fixed purchase and service obligations in the ordinary course of business. These arrangements primarily consist of, advertising commitments and service contracts. At December 31, 2018, future purchase and service obligations greater than $100,000 and one year were as follows (in thousands):

2019	$	16,535
2020	16,782
2021	12,494
2022	6,525
2023	1,954
Thereafter	700
Total obligations	$	54,990

Worksite Employee 401(k) Retirement Plan Class Action Litigation

In December 2015, a class action lawsuit was filed against us and the third-party discretionary trustee of the Insperity 401(k) retirement plan that is available to eligible worksite employees (the “Plan”) in the United States District Court for the Northern District of Georgia, Atlanta Division, on behalf of Plan participants. The suit generally alleges that Insperity’s third-party discretionary trustee of the Plan and Insperity breached their fiduciary duties to plan participants by selecting an Insperity subsidiary to serve as the recordkeeper for the Plan, by causing participants in the Plan to pay excessive recordkeeping fees to the Insperity subsidiary, by failing to monitor other fiduciaries, and by making imprudent investment choices. The parties filed a stipulation concerning class certification that defined the class as “all participants and beneficiaries of the Insperity 401(k) Plan from December 22, 2009 through September 30, 2017.” In November 2017, the court approved the class certification stipulation and denied the plaintiffs’ request for a jury trial. A date for the bench trial has not yet been set. Discovery is complete. On June 8, 2018, we filed a motion for summary judgment seeking dismissal of all claims. Briefing on that motion was completed in September 2018, which motion is now awaiting a ruling by the court. We believe we have meritorious defenses, and we intend to vigorously defend this litigation. As a result of uncertainty regarding the outcome of this matter, no provision has been made in the accompanying consolidated financial statements.

Other Litigation

We are a defendant in various other lawsuits and claims arising in the normal course of business. Management believes it has valid defenses in these cases and is defending them vigorously. While the results of litigation cannot be predicted with

Insperity F-27 2018 Form 10-K

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

certainty, management believes the final outcome of such litigation will not have a material adverse effect on our financial position or results of operations.

13. Quarterly Financial Data (Unaudited)

	Quarter Ended
(in thousands, except per share amounts)	March 31		June 30		Sept. 30		Dec. 31
2018
Revenues	$	1,014,372	$	922,295	$	925,126	$	966,756
Gross profit	199,720		154,544		166,054		161,591
Operating income	64,703		33,581		48,133		32,619
Net income	49,991		24,560		36,207		24,655
Basic net income per share	1.20		0.59		0.86		0.59
Diluted net income per share	1.18		0.58		0.86		0.59
2017
Revenues	$	882,664	$	795,552	$	795,513	$	826,494
Gross profit	159,346		130,553		139,966		142,866
Operating income	53,492		22,938		29,799		23,712
Net income	35,628		14,018		19,202		15,554
Basic net income per share(1)	0.85		0.34		0.46		0.36
Diluted net income per share(1)	0.85		0.33		0.46		0.36

____________________________________

⁽¹⁾  Adjusted to reflect the two-for-one split of our common stock effected on December 18, 2017 as a stock dividend.

Insperity F-28 2018 Form 10-K

EX-21.1

Exhibit 21.1

SUBSIDIARIES OF INSPERITY, INC.

• Insperity Holdings, Inc., a Delaware corporation and wholly owned subsidiary of Insperity, Inc.

• Insperity Enterprises, Inc., a Texas corporation and wholly owned subsidiary of Insperity Holdings, Inc.

• Administaff Partnerships Holding, Inc., a Delaware corporation and wholly owned subsidiary of Insperity Holdings, Inc.

• Insperity Captive Insurance Companies Limited, a Bermuda corporation and wholly owned subsidiary of Administaff Partnerships Holding, Inc.

• Insperity Business Services, L.P., a Delaware limited partnership, with Insperity Holdings, Inc. being a 1% general partner and Administaff Partnerships Holding, Inc. being a 99% limited partner.

• Insperity Retirement Services, L.P., a Delaware limited partnership, with Insperity Holdings, Inc. being a 1% general partner and Administaff Partnerships Holding, Inc. being a 99% limited partner.

• Insperity Services, L.P., a Delaware limited partnership, with Insperity Holdings, Inc. being a 1% general partner and Administaff Partnerships Holding, Inc. being a 99% limited partner.

• Administaff Partnerships Holding II, Inc., a Delaware corporation and wholly owned subsidiary of Insperity Services, L.P.

• Insperity GP, Inc., a Delaware corporation and wholly owned subsidiary of Insperity Services, L.P.

• Insperity Support Services, L.P., a Delaware limited partnership, with Insperity GP, Inc. being a 1% general partner and Administaff Partnerships Holding II, Inc. being a 99% limited partner.

• Administaff Companies, Inc., a Delaware corporation and wholly owned subsidiary of Insperity Holdings, Inc.

• Administaff Partnerships Holding III, Inc., a Delaware corporation and wholly owned subsidiary of Administaff Companies, Inc.

• Insperity PEO Services, L.P., a Delaware limited partnership, with Administaff Companies, Inc. being a 1% general partner and Administaff Partnerships Holding III, Inc. being a 99% limited partner.

• Insperity Insurance Services, L.L.C., a Delaware limited liability company and wholly owned subsidiary of Insperity PEO Services, L.P.

• Insperity Employment Screening, L.L.C, a Delaware limited liability company and wholly owned subsidiary of Insperity Holdings, Inc.

• Insperity Expense Management, Inc. a California corporation and wholly owned subsidiary of Insperity Holdings, Inc.

• Insperity Payroll Services, L.L.C., a Delaware limited liability company and wholly owned subsidiary of Insperity Business Services, L.P.

EX-23.1

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the following Registration Statements:

(1) Registration Statements (Form S-8 Nos. 333-221310, 333-181569) pertaining to the Insperity, Inc. 2012 Incentive Plan,

(2) Registration Statements (Form S-8 No. 333-159007, 333-140602, 333-66344) pertaining to the Insperity, Inc. 2001 Incentive Plan,

(3) Registration Statement (Form S-8 No. 333-151275) pertaining to the Insperity, Inc. 2008 Employee Stock Purchase Plan,

(4) Registration Statement (Form S-8 No. 333-118790) pertaining to the Insperity, Inc. Directors Compensation Plan, and

(5) Registration Statements (Form S-8 Nos. 333-85151, 333-66342) pertaining to the Insperity, Inc. Non-Qualified Stock Option Plan;

of our reports dated February 11, 2019, with respect to the consolidated financial statements of Insperity, Inc. and the effectiveness of internal control over financial reporting of Insperity, Inc. included in this Annual Report (Form 10-K) of Insperity, Inc. for the year ended December 31, 2018.

	/s/Ernst & Young LLP
Houston, Texas
February 11, 2019

EX-24.1

EXHIBIT 24.1

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned, in my capacity as a director of Insperity, Inc., a Delaware corporation (the "Company") appoints PAUL J. SARVADI, DOUGLAS S. SHARP and DANIEL D. HERINK and each of them, severally, as my true and lawful attorney or attorneys-in-fact and agent or agents, each of whom shall be authorized to act with or without the other, with full power of substitution and resubstitution, to execute, in my capacity as a director of the Company, and to file or cause to be filed, with the Securities and Exchange Commission, the Company's Annual Report on Form 10-K for the year ended December 31, 2018 and any and all amendments thereto as said attorneys or any of them shall deem necessary or incidental in connection therewith, and all materials required by the Securities Exchange Act of 1934, as amended, with full power and authority to each of said attorneys-in-fact and agents to do and perform in the name and on behalf of the undersigned, each and every act and thing whatsoever that is necessary, appropriate or advisable in connection with any or all the above-described matters and to all intents and purposes as the undersigned might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them or their substitutes, may lawfully do or cause to be done by virtue hereof.

/s/ Tim Clifford	January 23, 2019
Tim Clifford	Date

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned, in my capacity as a director of Insperity, Inc., a Delaware corporation (the "Company") appoints PAUL J. SARVADI, DOUGLAS S. SHARP and DANIEL D. HERINK and each of them, severally, as my true and lawful attorney or attorneys-in-fact and agent or agents, each of whom shall be authorized to act with or without the other, with full power of substitution and resubstitution, to execute, in my capacity as a director of the Company, and to file or cause to be filed, with the Securities and Exchange Commission, the Company's Annual Report on Form 10-K for the year ended December 31, 2018 and any and all amendments thereto as said attorneys or any of them shall deem necessary or incidental in connection therewith, and all materials required by the Securities Exchange Act of 1934, as amended, with full power and authority to each of said attorneys-in-fact and agents to do and perform in the name and on behalf of the undersigned, each and every act and thing whatsoever that is necessary, appropriate or advisable in connection with any or all the above-described matters and to all intents and purposes as the undersigned might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them or their substitutes, may lawfully do or cause to be done by virtue hereof.

/s/ Carol Kaufman	January 23, 2019
Carol Kaufman	Date

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned, in my capacity as a director of Insperity, Inc., a Delaware corporation (the "Company") appoints PAUL J. SARVADI, DOUGLAS S. SHARP and DANIEL D. HERINK and each of them, severally, as my true and lawful attorney or attorneys-in-fact and agent or agents, each of whom shall be authorized to act with or without the other, with full power of substitution and resubstitution, to execute, in my capacity as a director of the Company, and to file or cause to be filed, with the Securities and Exchange Commission, the Company's Annual Report on Form 10-K for the year ended December 31, 2018 and any and all amendments thereto as said attorneys or any of them shall deem necessary or incidental in connection therewith, and all materials required by the Securities Exchange Act of 1934, as amended, with full power and authority to each of said attorneys-in-fact and agents to do and perform in the name and on behalf of the undersigned, each and every act and thing whatsoever that is necessary, appropriate or advisable in connection with any or all the above-described matters and to all intents and purposes as the undersigned might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them or their substitutes, may lawfully do or cause to be done by virtue hereof.

/s/ Ellen H. Masterson	January 24, 2019
Ellen H. Masterson	Date

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned, in my capacity as a director of Insperity, Inc., a Delaware corporation (the "Company") appoints PAUL J. SARVADI, DOUGLAS S. SHARP and DANIEL D. HERINK and each of them, severally, as my true and lawful attorney or attorneys-in-fact and agent or agents, each of whom shall be authorized to act with or without the other, with full power of substitution and resubstitution, to execute, in my capacity as a director of the Company, and to file or cause to be filed, with the Securities and Exchange Commission, the Company's Annual Report on Form 10-K for the year ended December 31, 2018 and any and all amendments thereto as said attorneys or any of them shall deem necessary or incidental in connection therewith, and all materials required by the Securities Exchange Act of 1934, as amended, with full power and authority to each of said attorneys-in-fact and agents to do and perform in the name and on behalf of the undersigned, each and every act and thing whatsoever that is necessary, appropriate or advisable in connection with any or all the above-described matters and to all intents and purposes as the undersigned might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them or their substitutes, may lawfully do or cause to be done by virtue hereof.

/s/ Randall A. Mehl	January 24, 2019
Randall A. Mehl	Date

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned, in my capacity as a director of Insperity, Inc., a Delaware corporation (the "Company") appoints PAUL J. SARVADI, DOUGLAS S. SHARP and DANIEL D. HERINK and each of them, severally, as my true and lawful attorney or attorneys-in-fact and agent or agents, each of whom shall be authorized to act with or without the other, with full power of substitution and resubstitution, to execute, in my capacity as a director of the Company, and to file or cause to be filed, with the Securities and Exchange Commission, the Company's Annual Report on Form 10-K for the year ended December 31, 2018 and any and all amendments thereto as said attorneys or any of them shall deem necessary or incidental in connection therewith, and all materials required by the Securities Exchange Act of 1934, as amended, with full power and authority to each of said attorneys-in-fact and agents to do and perform in the name and on behalf of the undersigned, each and every act and thing whatsoever that is necessary, appropriate or advisable in connection with any or all the above-described matters and to all intents and purposes as the undersigned might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them or their substitutes, may lawfully do or cause to be done by virtue hereof.

/s/ John Morphy	January 28, 2019
John Morphy	Date

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned, in my capacity as a director of Insperity, Inc., a Delaware corporation (the "Company") appoints PAUL J. SARVADI, DOUGLAS S. SHARP and DANIEL D. HERINK and each of them, severally, as my true and lawful attorney or attorneys-in-fact and agent or agents, each of whom shall be authorized to act with or without the other, with full power of substitution and resubstitution, to execute, in my capacity as a director of the Company, and to file or cause to be filed, with the Securities and Exchange Commission, the Company's Annual Report on Form 10-K for the year ended December 31, 2018 and any and all amendments thereto as said attorneys or any of them shall deem necessary or incidental in connection therewith, and all materials required by the Securities Exchange Act of 1934, as amended, with full power and authority to each of said attorneys-in-fact and agents to do and perform in the name and on behalf of the undersigned, each and every act and thing whatsoever that is necessary, appropriate or advisable in connection with any or all the above-described matters and to all intents and purposes as the undersigned might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them or their substitutes, may lawfully do or cause to be done by virtue hereof.

/s/ Richard G. Rawson	January 29, 2019
Richard G. Rawson	Date

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Paul J. Sarvadi, certify that:

1. I have reviewed this annual report on Form 10-K of Insperity, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:     February 11, 2019

/s/ Paul J. Sarvadi

Paul J. Sarvadi

Chairman of the Board and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Douglas S. Sharp, certify that:

1. I have reviewed this annual report on Form 10-K of Insperity, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:      February 11, 2019

/s/ Douglas S. Sharp

Douglas S. Sharp

Senior Vice President of Finance,

Chief Financial Officer and Treasurer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906

OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Insperity, Inc. (the “Company”) on Form 10-K for the period ending December 31, 2018, (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, I, Paul J. Sarvadi, Chairman of the Board and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge, that:

1.           The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2.           The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Paul J. Sarvadi

Paul J. Sarvadi

Chairman of the Board and Chief Executive Officer

February 11, 2019

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906

OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Insperity, Inc. (the “Company”) on Form 10-K for the period ending December 31, 2018, (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, I, Douglas S. Sharp, Senior Vice President of Finance, Chief Financial Officer and Treasurer of the Company, certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, to the best of my knowledge, that:

1.            The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2.            The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Douglas S. Sharp

Douglas S. Sharp

Senior Vice President of Finance,

Chief Financial Officer and Treasurer

February 11, 2019

XML

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2018	Feb. 04, 2019	Jun. 30, 2018
Entity Information [Line Items]
Entity Registrant Name	INSPERITY, INC.
Entity Central Index Key	0001000753
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 3,635,951,485
Entity Common Stock, Shares Outstanding		40,937,606
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018

XML

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Assets
Cash and cash equivalents	$ 326,773	$ 354,260
Restricted cash	42,227	41,137
Marketable securities	60,781	1,960
Accounts receivable, net	400,623	333,981
Prepaid insurance	8,411	10,782
Other current assets	27,721	26,991
Income taxes receivable	0	9,824
Total current assets	866,536	778,935
Property and equipment, net	117,213	95,659
Prepaid health insurance	9,000	9,000
Deposits	172,674	159,515
Goodwill and other intangible assets, net	12,726	12,762
Deferred income taxes, net	8,816	4,283
Other assets	4,851	3,541
Total assets	1,191,816	1,063,695
Liabilities and stockholders’ equity
Accounts payable	10,622	6,447
Payroll taxes and other payroll deductions payable	261,166	303,247
Accrued worksite employee payroll cost	329,979	267,402
Accrued health insurance costs	35,153	26,075
Accrued workers’ compensation costs	45,818	42,974
Accrued corporate payroll and commissions	60,704	52,595
Other accrued liabilities	28,890	25,989
Total current liabilities	772,332	724,729
Accrued workers’ compensation costs	187,412	166,493
Long-term debt	144,400	104,400
Other Liabilities, Noncurrent	9,996	1,752
Total noncurrent liabilities	341,808	272,645
Commitments and contingencies
Stockholders’ equity:
Preferred stock, par value $0.01 per share: Shares authorized - 20,000 Shares issued and outstanding - none	0	0
Common stock, par value $0.01 per share: Shares authorized - 60,000 Shares issued - 55,489 at December 31, 2018 and 2017	555	555
Additional paid-in capital	36,752	25,337
Treasury stock, at cost (14,555 and 14,009 shares held in treasury)	(357,569)	(256,363)
Accumulated other comprehensive income, net of tax	(9)	(5)
Retained earnings	397,947	296,797
Total stockholders’ equity	77,676	66,321
Total liabilities and stockholders’ equity	$ 1,191,816	$ 1,063,695

XML

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares shares in Thousands	Dec. 31, 2018	Dec. 31, 2017
Stockholders' equity:
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized (in shares)	20,000	20,000
Preferred stock, issued (in shares)	0	0
Preferred stock, outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	60,000	60,000
Common stock, issued (in shares)	55,489	55,489
Treasury stock, shares (in shares)	14,555	14,009

XML

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Revenues(1)	[1]	$ 3,828,549	$ 3,300,223	$ 2,941,347
Payroll taxes, benefits and workers’ compensation costs		3,146,640	2,727,492	2,449,737
Gross profit		681,909	572,731	491,610
Salaries, wages and payroll taxes		301,027	259,531	229,589
Stock-based compensation		20,425	24,345	16,643
Commissions		28,957	22,773	19,288
Advertising		18,554	16,686	16,447
General and administrative expenses		111,068	101,273	86,693
Depreciation and amortization		22,842	18,182	16,644
Total operating expenses		502,873	442,790	385,304
Operating income		179,036	129,941	106,306
Other income (expense):
Interest Income		7,992	3,413	1,267
Interest Expense		(4,668)	(3,213)	(2,396)
Income before income tax expense		182,360	130,141	105,177
Income tax expense		46,947	45,739	39,186
Net income		135,413	84,402	65,991
Less distributed and undistributed earnings allocated to participating securities		1,875	1,517	1,496
Net income allocated to common shares		$ 133,538	$ 82,885	$ 64,495
Basic net income per share of common stock (in dollars per share)		$ 3.24	$ 2.02	$ 1.55
Diluted net income per share of common stock (in dollars per share)		$ 3.22	$ 2.01	$ 1.54

[1] (1) Revenues are comprised of gross billings less worksite employee (“WSEE”) payroll costs as follows: Year ended December 31,(in thousands)201820172016 Gross billings$23,830,731$20,173,812$17,932,857Less: WSEE payroll cost20,002,18216,873,58914,991,510Revenues$3,828,549$3,300,223$2,941,347

XML

CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Gross billings	$ 23,830,731	$ 20,173,812	$ 17,932,857
Worksite employee payroll costs	$ 20,002,182	$ 16,873,589	$ 14,991,510

XML

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 135,413	$ 84,402	$ 65,991
Other comprehensive loss:
Unrealized loss on available-for-sale securities, net of tax	(4)	(2)	(3)
Comprehensive income	$ 135,409	$ 84,400	$ 65,988

XML

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]
Balance at Dec. 31, 2015	$ 172,455,000	$ 617,000	$ 144,392,000	$ (205,325,000)	$ 0	$ 232,771,000
Balance (shares) at Dec. 31, 2015		61,517
Purchase of treasury stock, at cost	(31,669,000)	$ 0	0	(31,669,000)	0	0
Repurchase of common stock	(144,263,000)	$ (62,000)	(144,201,000)	0	0	0
Repurchase of common stock (in shares)		(6,028)
Exercise of stock options	598,000	$ 0	(27,000)	625,000	0	0
Stock-based compensation expense	16,643,000	0	8,156,000	8,487,000	0	0
Other	1,372,000	0	642,000	730,000	0	0
Dividends paid	(20,599,000)	0	0	0	0	(20,599,000)
Unrealized gain (loss) on marketable securities, net of tax	(3,000)	0	0	0	(3,000)	0
Net income	65,991,000	0	0	0	0	65,991,000
Balance at Dec. 31, 2016	60,525,000	$ 555,000	8,962,000	(227,152,000)	(3,000)	278,163,000
Balance (shares) at Dec. 31, 2016		55,489
Purchase of treasury stock, at cost	(38,735,000)	$ 0	0	(38,735,000)	0	0
Stock-based compensation expense	24,345,000	0	15,508,000	8,837,000	0	0
Other	1,554,000	0	867,000	687,000	0	0
Dividends paid	(65,768,000)	0	0	0	0	(65,768,000)
Unrealized gain (loss) on marketable securities, net of tax	(2,000)	0	0	0	(2,000)	0
Net income	84,402,000	0	0	0	0	84,402,000
Balance at Dec. 31, 2017	66,321,000	$ 555,000	25,337,000	(256,363,000)	(5,000)	296,797,000
Balance (shares) at Dec. 31, 2017		55,489
Purchase of treasury stock, at cost	(113,327,000)	$ 0	0	(113,327,000)	0	0
Stock-based compensation expense	20,425,000	0	9,696,000	11,584,000	0	(855,000)
Other	2,256,000	0	1,719,000	537,000	0	0
Dividends paid	(33,408,000)	0	0	0	0	(33,408,000)
Unrealized gain (loss) on marketable securities, net of tax	(4,000)	0	0	0	(4,000)	0
Net income	135,413,000	0	0	0	0	135,413,000
Balance at Dec. 31, 2018	$ 77,676,000	$ 555,000	$ 36,752,000	$ (357,569,000)	$ (9,000)	$ 397,947,000
Balance (shares) at Dec. 31, 2018		55,489

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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities
Net income	$ 135,413	$ 84,402	$ 65,991
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	22,842	18,182	16,644
Amortization of marketable securities	137	80	90
Stock-based compensation	20,425	24,345	16,643
Deferred income taxes	(4,533)	9,742	2,951
Changes in operating assets and liabilities:
Accounts receivable	(66,642)	(63,697)	(69,619)
Prepaid insurance	2,371	4,259	(7,624)
Other current assets	(730)	(7,465)	(2,391)
Other assets	(2,005)	(2,496)	(1,465)
Accounts payable	4,175	2,258	(1,192)
Payroll taxes and other payroll deductions payable	(42,081)	55,481	42,373
Accrued worksite employee payroll expense	62,577	52,188	53,297
Accrued health insurance costs	9,078	(285)	12,717
Accrued workers’ compensation costs	23,763	23,945	21,723
Accrued corporate payroll, commissions and other accrued liabilities	8,941	17,138	3,150
Income taxes payable/receivable	10,749	(4,875)	(7,920)
Total adjustments	49,067	128,800	79,377
Net cash provided by operating activities	184,480	213,202	145,368
Marketable securities:
Purchases	(87,887)	(1,752)	(1,049)
Proceeds from maturities	12,625	1,561	1,715
Proceeds from dispositions	16,299	0	7,268
Property and equipment:
Purchases	(35,328)	(33,337)	(33,994)
Proceeds from dispositions	151	278	43
Net cash used in investing activities	(94,140)	(33,250)	(26,017)
Cash flows from financing activities
Purchase of treasury stock	(113,327)	(38,735)	(31,669)
Repurchase of common stock	0	0	144,263
Dividends paid	(33,408)	(65,768)	(20,599)
Borrowings under long-term debt agreement	40,000	0	124,400
Principal repayments	0	0	(20,000)
Proceeds from the exercise of stock options	0	0	598
Other	2,257	1,554	1,373
Net cash used in financing activities	(104,478)	(102,949)	(90,160)
Net increase (decrease) in cash and cash equivalents	(14,138)	77,003	29,191
Cash, cash equivalents and restricted cash beginning of year	549,612	472,609	443,418
Cash, cash equivalents and restricted cash at end of year	535,474	549,612	472,609
Supplemental disclosures of cash flow information
Income taxes, net	40,730	40,872	44,148
Interest expense	4,668	3,213	2,396
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash, cash equivalents and restricted cash beginning of year	549,612	472,609	443,418
Cash, cash equivalents and restricted cash at end of year	$ 535,474	$ 549,612	$ 472,609

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Accounting Policies

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Accounting Policies

1. Accounting Policies

Description of Business

Insperity, Inc. (“Insperity” or “we”, “our”, and “us”) provides an array of human resources (“HR”) and business solutions designed to help improve business performance. Since our formation in 1986, we have evolved from being solely a professional employer organization (“PEO”), an industry we pioneered, to our current position as a comprehensive business performance solutions provider. We were organized as a corporation in 1986 and have provided PEO services since inception.

Our most comprehensive HR services offerings are provided through our Workforce Optimization^® and Workforce Synchronization^TM solutions (together, our “PEO HR Outsourcing solutions”), which encompass a broad range of human resources functions, including payroll and employment administration, employee benefits, workers’ compensation, government compliance, performance management and training and development services, along with our cloud-based human capital management platform, Insperity Premier^TM.

In addition to our PEO HR Outsourcing solutions, we also offer a comprehensive traditional payroll and human capital management solution, known as Workforce Acceleration. We also offer a number of other business performance solutions, including Time and Attendance, Performance Management, Organizational Planning, Recruiting Services, Employment Screening, Expense Management, Retirement Services and Insurance Services, many of which are offered via desktop applications and cloud-based delivery models. These other products or services are offered separately or with our other solutions.

We provide our PEO HR Outsourcing solutions by entering into a co-employment relationship with our clients, under which Insperity and its clients each take responsibility for certain portions of the employer-employee relationship. Insperity and its clients designate each party’s responsibilities through its Client Service Agreement (“CSA”), under which Insperity becomes an employer of the employees who work at the client’s location (“WSEE”) for most administrative and regulatory purposes.

As a co-employer of its WSEEs, we assume many of the rights and obligations associated with being an employer. We enter into an employment agreement with each WSEE, thereby maintaining a variety of employer rights, including the right to hire or terminate employees, the right to evaluate employee qualifications or performance, and the right to establish employee compensation levels. Typically, Insperity only exercises these rights in consultation with its clients or when necessary to ensure regulatory compliance. The responsibilities associated with our role as employer include the following obligations with regard to our WSEEs: (1) to compensate its WSEEs through wages and salaries; (2) to pay the employer portion of payroll-related taxes; (3) to withhold and remit (where applicable) the employee portion of payroll-related taxes; (4) to provide employee benefit programs; and (5) to provide workers’ compensation insurance coverage.

In addition to our assumption of employer status for our WSEEs, our PEO HR Outsourcing solutions also include other human resources functions for our clients to support the effective and efficient use of personnel in their business operations. To provide these functions, we maintain a significant staff of professionals trained in a wide variety of human resources functions, including employee training, employee recruiting, employee performance management, employee compensation and employer liability management. These professionals interact and consult with clients on a daily basis to help identify each client’s service requirements and to ensure that we are providing appropriate and timely personnel management services.

Revenue and Direct Cost Recognition

On January 1, 2018, we adopted Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers (Topic 606) using the modified retrospective approach. Under this method, the guidance is applied only to the most current period presented in the financial statements. ASU No. 2014-09 outlines a single comprehensive revenue recognition model for revenue arising from contracts with customers and superseded most of the previous revenue recognition guidance, including industry-specific guidance. Under ASU No. 2014-09, an entity recognizes revenue for the transfer of promised goods or services to customers in an amount that reflects the consideration for which the entity expects to be entitled in exchange for those goods or services. Our revenue recognition policies remained substantially unchanged as a result of the adoption of ASU No. 2014-09 and we did not have any significant changes in our business processes or systems.

We enter into contracts with our customers for human resources services based on a stated rate and price in the contract. Our contracts generally have a term of 12 months, but are cancellable at any time by either party with 30-days’ notice. Our performance obligations are satisfied as services are rendered each month. The term between invoicing and when our performance obligations are satisfied is not significant. Payment terms are typically due concurrently with the invoicing of our PEO services. We do not have significant financing components or significant payment terms.

Our revenue is generally recognized ratably over the payroll period as WSEEs perform their service at the client worksite. Customers are invoiced concurrently with each periodic payroll of its WSEEs. Revenues that have been recognized but not invoiced represent unbilled accounts receivable included in accounts receivable, net on our Consolidated Balance Sheets.

Pursuant to the practical expedients provided under ASU No 2014-09, we expense sales commissions when incurred because the terms of our contracts are cancellable by either party with a 30-day notice. These costs are recorded in commissions in our Consolidated Statements of Operations.

Our revenue for our PEO HR Outsourcing solutions by geographic region and for our other products and services offerings are as follows:

	Year Ended December 31,
(in thousands)	2018		2017		2016
Northeast	$	996,541	$	854,629	$	750,748
Southeast	447,584		379,874		318,185
Central	637,779		543,486		467,297
Southwest	895,243		767,207		689,334
West	797,942		702,619		664,308
	3,775,089		3,247,815		2,889,872
Other revenue	53,460		52,408		51,475
Total revenue	$	3,828,549	$	3,300,223	$	2,941,347

Our PEO HR Outsourcing solutions revenues are primarily derived from our gross billings, which are based on (1) the payroll cost of its WSEEs; and (2) a markup computed as a percentage of the payroll cost. The gross billings are invoiced concurrently with each periodic payroll of its WSEEs. Revenues, which exclude the payroll cost component of gross billings and therefore consist solely of markup, are recognized ratably over the payroll period as WSEEs perform their service at the client worksite.

In determining the pricing of the markup component of our gross billings, we take into consideration our estimates of the costs directly associated with our WSEEs, including payroll taxes, benefits and workers’ compensation costs, plus an acceptable gross profit margin. As a result, our operating results are significantly impacted by our ability to accurately estimate, control and manage our direct costs relative to the revenues derived from the markup component of our gross billings.

Consistent with our revenue recognition policy, our direct costs do not include the payroll cost of our WSEEs. Our direct costs associated with our revenue generating activities are primarily comprised of all other costs related to our WSEEs, such as the employer portion of payroll-related taxes, employee benefit plan premiums and workers’ compensation insurance costs.

Segment Reporting

We operate one reportable segment under ASC 280, Segment Reporting.

Principles of Consolidation

The Consolidated Financial Statements include the accounts of Insperity, Inc. and its wholly owned subsidiaries. Intercompany accounts and transactions have been eliminated in consolidation.

Use of Estimates

The preparation of financial statements in conformity with United States Generally Accepted Accounting Principles requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.

Concentrations of Credit Risk

Financial instruments that could potentially subject us to concentration of credit risk include accounts receivable and marketable securities.

Cash, Cash Equivalents and Marketable Securities

We invest our excess cash in federal government and municipal-based money market funds and debt instruments of U.S. municipalities. All highly liquid investments with stated maturities of three months or less from date of purchase are classified as cash equivalents. Liquid investments with stated maturities of greater than three months are classified as marketable securities in current assets.

We account for marketable securities in accordance with ASC 320, Investments – Debt and Equity Securities. We determine the appropriate classification of all marketable securities as held-to-maturity, available-for-sale or trading at the time ofpurchase, and re-evaluate such classification as of each balance sheet date. At December 31, 2018 and 2017, all of our investments in marketable securities were classified as available-for-sale, and as a result, were reported at fair value. Unrealized gains and losses are reported as a component of accumulated other comprehensive income (loss) in stockholders’ equity. The amortized cost of debt securities is adjusted for amortization of premiums and accretion of discounts from the date of purchase to maturity. Such amortization is included in interest income as an addition to or deduction from the coupon interest earned on the investments. We use the specific identification method of determining the cost basis in computing realized gains and losses on the sale of our available-for-sale securities. Realized gains and losses are included in other income.

Property and Equipment

Property and equipment are recorded at cost and are depreciated over the estimated useful lives of the related assets using the straight-line method.

Property and equipment, net consisted of the following:

(in thousands)	December 31, 2018			December 31, 2017
Land	$	6,215		$	6,215
Buildings and improvements	112,308			95,615
Computer hardware and software	115,259			105,060
Software development costs	71,332			60,568
Furniture, fixtures and other	45,694			42,891
	350,808			310,349
Accumulated depreciation and amortization	(233,595		)	(214,690		)
Total property and equipment, net	$	117,213		$	95,659

The estimated useful lives of property and equipment for purposes of computing depreciation are as follows:

	Useful Life
Buildings and improvements	5-30 years
Computer hardware and software	2-5 years
Software development costs	3-5 years
Furniture, fixtures and other	5-7 years

Software development costs relate primarily to software code development, systems integration and testing of our proprietary professional employer information systems and are accounted for in accordance with ASC 350-40, Internal Use Software. Capitalized software development costs are amortized using the straight-line method over the estimated useful lives of the software, generally three years. We recognized $6.0 million, $4.1 million and $3.0 million in amortization of capitalized computer software costs in 2018, 2017 and 2016, respectively. Unamortized software development costs were $19.6 million and $14.9 million in 2018 and 2017, respectively.

We account for our software products in accordance with ASC 985-20, Costs of Software to be Sold. This Topic establishes standards of financial accounting and reporting for the costs of computer software to be sold, leased, or otherwise marketed as a separate product or as part of a product or process, whether internally developed and produced or purchased.

We periodically evaluate our long-lived assets for impairment in accordance with ASC 360-10, Property, Plant, and Equipment. ASC 360-10 requires that an impairment loss be recognized for assets to be disposed of or held-for-use when the carrying amount of an asset is deemed to not be recoverable. If events or circumstances were to indicate that any of our long-lived assets might be impaired, we would assess recoverability based on the estimated undiscounted future cash flows to be generated from the applicable asset. In addition, we may record an impairment loss to the extent that the carrying value of the asset exceeded the fair value of the asset. Fair value is generally determined using an estimate of discounted future net cash flows from operating activities or upon disposal of the asset.

Goodwill and Other Intangible Assets

Our goodwill is not amortized, but is tested for impairment on an annual basis or when there is an indication that there has been a potential decline in the fair value of a reporting unit. Annually, we perform a qualitative analysis to determine if it is more likely than not that the fair value has declined below its carrying value. This analysis considers various qualitative factors. Due to the nature of our business, all of our goodwill is associated with one reporting unit. We perform our annual impairment testing during the fourth quarter. Based on the results of our analysis, no impairment loss was recognized in 2018, 2017 or 2016.

At December 31, 2018 and 2017, we had an aggregate carrying amount of goodwill acquired of $21.2 million, which has been reduced by cumulative impairment charges of $8.5 million. Accordingly our goodwill balance at December 31, 2018 and 2017 was $12.7 million.

Health Insurance Costs

We provide group health insurance coverage to our WSEEs through a national network of carriers including UnitedHealthcare (“United”), UnitedHealthcare of California, Kaiser Permanente, Blue Shield of California, HMSA BlueCross BlueShield of Hawaii and Tufts, all of which provide fully insured policies or service contracts.

The policy with United provides the majority of our health insurance coverage. As a result of certain contractual terms, we have accounted for this plan since its inception using a partially self-funded insurance accounting model. Accordingly, we record the cost of the United portion of the plan, including an estimate of the incurred claims, taxes and administrative fees (collectively the “Plan Costs”) as benefits expense, a component of direct costs, in the Consolidated Statements of Operations. The estimated incurred claims are based upon: (1) the level of claims processed during each quarter; (2) estimated completion rates based upon recent claim development patterns under the plan; and (3) the number of participants in the plan, including both active and COBRA enrollees. Each reporting period, changes in the estimated ultimate costs resulting from claim trends, plan design and migration, participant demographics and other factors are incorporated into the benefits costs.

Additionally, since the plan’s inception, under the terms of the contract, United establishes cash funding rates 90 days in advance of the beginning of a reporting quarter. If the Plan Costs for a reporting quarter are greater than the premiums paid and owed to United, a deficit in the plan would be incurred and a liability for the excess costs would be accrued in our Consolidated Balance Sheets. On the other hand, if the Plan Costs for the reporting quarter are less than the premiums paid and owed to United, a surplus in the plan would be incurred and we would record an asset for the excess premiums in our Consolidated Balance Sheets. The terms of the arrangement require us to maintain an accumulated cash surplus in the plan of $9.0 million, which is reported as long-term prepaid insurance. In addition, United requires a deposit equal to approximately one day of claims funding activity, which was $6.0 million as of December 31, 2018, and is reported as a long-term asset. As of December 31, 2018, Plan Costs were more than the net premiums paid and owed to United by $6.3 million. As this amount is less than the agreed-upon $9.0 million surplus maintenance level, the $15.3 million difference is also included in accrued health insurance costs, a current liability, in our Consolidated Balance Sheets. The premiums, including the additional quarterly premiums, owed to United at December 31, 2018, were $15.2 million, which is included in accrued health insurance costs, a current liability in our Consolidated Balance Sheets. Our benefits costs incurred included a reduction of $1.3 million in 2018, an increase of $1.2 million in 2017 and an increase of $5.1 million in 2016 for changes in estimated run-off related to prior periods.

Workers’ Compensation Costs

Our workers’ compensation coverage for our WSEEs in our PEO HR Outsourcing solutions has been provided through an arrangement with the Chubb Group of Insurance Companies or its predecessors (the “Chubb Program”) since 2007. The Chubb Program is fully insured in that Chubb has the responsibility to pay all claims incurred under the policy regardless of whether we satisfy our responsibilities. Under the Chubb Program, we have financial responsibility to Chubb for the first $1 million layer of claims per occurrence and, for claims over $1 million, up to a maximum aggregate amount of $6 million per policy year for claims that exceed $1 million. Chubb bears the financial responsibility for all claims in excess of these levels.

Because we bear the financial responsibility for claims up to the levels noted above, such claims, which are the primary component of our workers’ compensation costs, are recorded in the period incurred. Workers’ compensation insurance includes ongoing health care and indemnity coverage whereby claims are paid over numerous years following the date of injury. Accordingly, the accrual of related incurred costs in each reporting period includes estimates, which take into account the ongoing development of claims and therefore requires a significant level of judgment.

We utilize a third-party actuary to estimate our loss development rate, which is primarily based upon the nature of WSEEs’ job responsibilities, the location of WSEEs, the historical frequency and severity of workers’ compensation claims, and an estimate of future cost trends. Each reporting period, changes in the actuarial assumptions resulting from changes in actual claims experience and other trends are incorporated into our workers’ compensation claims cost estimates. During the years ended December 31, 2018, 2017 and 2016, we reduced accrued workers’ compensation costs by $18.8 million, $16.3 million and $10.9 million, respectively, for changes in estimated losses related to prior reporting periods. Workers’ compensation cost estimates are discounted to present value at a rate based upon the U.S. Treasury rates that correspond with the weighted average estimated claim payout period (the average discount rate was 2.6% in 2018 and 1.6% in 2017) are accreted over the estimated claim payment period and included as a component of direct costs in our Consolidated Statements of Operations.

The following table provides the activity and balances related to incurred but not paid workers’ compensation claims:

	Year Ended December 31,
(in thousands)	2018			2017
Beginning balance	$	207,630		$	183,928
Accrued claims	72,066			68,194
Present value discount	(7,829		)	(4,308		)
Paid claims	(42,228		)	(40,184		)
Ending balance	$	229,639		$	207,630
Current portion of accrued claims	$	42,227		$	41,137
Long-term portion of accrued claims	187,412			166,493
Total accrued claims	$	229,639		$	207,630

The current portion of accrued workers’ compensation costs at December 31, 2018 and 2017 includes $3.6 million and $1.8 million, respectively, of workers’ compensation administrative fees.

The undiscounted accrued workers’ compensation costs were $247.4 million as of December 31, 2018 and $219.9 million as of December 31, 2017.

At the beginning of each policy period, the workers’ compensation insurance carrier establishes monthly funding requirements comprised of premium costs and funds to be set aside for payment of future claims (“claim funds”). The level of claim funds is primarily based upon anticipated WSEE payroll levels and expected workers’ compensation loss rates, as determined by the insurance carrier. Monies funded into the program for incurred claims expected to be paid within one year are recorded as restricted cash, a short-term asset, while the remainder of claim funds are included in deposits, a long-term asset in our Consolidated Balance Sheets. In 2018, we received $19.4 million for the return of excess claim funds related to the workers’ compensation program, which decreased deposits. As of December 31, 2018, we had restricted cash of $42.2 million and deposits of $166.5 million.

Our estimate of incurred claim costs expected to be paid within one year is included in short-term liabilities, while our estimate of incurred claim costs expected to be paid beyond one year is included in noncurrent liabilities on our Consolidated Balance Sheets.

Stock-Based Compensation

At December 31, 2018, we have one stock-based employee compensation plan under which we may issue awards. We account for this plan under the recognition and measurement principles of ASC 718, Compensation – Stock Compensation, which requires all share-based payments to employees, including grants of employee stock options, to be recognized in the income statement based on their fair values.

We generally make annual grants of restricted and unrestricted stock under our stock-based incentive compensation plan to our non-employee directors, officers and other management. Restricted stock grants to officers and other management generally vest over a period of three years from the date of grant. Shares of restricted stock are valued based on the fair value on date of grant and the associated expense, net of estimated forfeitures, is recognized over the vesting period. Commencing in 2017, stock grants issued to non-employee directors upon their initial appointment to the board are 100% vested on the grant date. Annual stock grants issued to non-employee directors are 100% vested on the grant date.

Our Insperity Long-Term Incentive Program (the “LTIP”) provides for performance based long-term compensation awards in the form of performance units to certain employees based on the achievement of pre-established performance goals. Each performance unit represents the right to receive one common share at a future date based on our performance against certain targets. Performance units have a vesting schedule of three years. Commencing in 2016, a portion of the LTIP grant to employees was considered a market-based performance award that vests at the end of a three-year period assuming continued employment and achievement of market-based performance goals. The fair value of each performance unit is the market price of our common stock on the date of grant. The fair value of each market-based performance unit was determined through use of the Monte Carlo simulation method. The compensation expense for such awards is recognized on a straight line basis over the vesting term. Over the performance period the number of shares expected to be issued is adjusted upward or downward based on the probability of achievement of the performance target.

Company-Sponsored 401(k) Retirement Plans

Under our 401(k) retirement plan for corporate employees (the “Corporate Plan”), we matched 100% of eligible corporate employees’ contributions, up to 6% of the employees’ eligible compensation in 2018, 2017 and 2016. Matching contributions under the Corporate Plan are immediately vested. During 2018, 2017 and 2016, we made matching contributions on behalf of corporate employees to the Corporate Plan of $10.3 million, $8.7 million and $8.0 million, respectively, and is included in salaries, wages and payroll taxes in our Consolidated Statements of Operations.

Under our separate 401(k) retirement plan for WSEEs (the “Worksite Employee Plan”), the match percentage for WSEEs ranges from 0% to 6%, as determined by each client company. Matching contributions under the Worksite Employee Plan are immediately vested. During 2018, 2017 and 2016, we made matching contributions on behalf of WSEEs to the Worksite Employee Plan of $165.5 million, $129.0 million and $108.3 million, respectively.

Advertising

We expense all advertising costs as incurred.

Income Taxes

We use the liability method in accounting for income taxes. Under this method, deferred tax assets and liabilities are determined based on differences between financial reporting and income tax carrying amounts of assets and liabilities and are measured using the enacted tax rates and laws in effect when the differences are expected to reverse. On December 22, 2017, the Tax Cuts and Jobs Act (the “2017 Tax Reform Act”) was signed into law. The 2017 Tax Reform Act significantly changes U.S. corporate income tax laws by, among other things, reducing the U.S. corporate income tax rate to 21% beginning in 2018. Please read Note 7, “Income Taxes,” for additional information.

Reclassifications

Certain prior year amounts have been reclassified to conform to the 2018 presentation.

New Accounting Pronouncements

In February 2016, the FASB issued ASU No. 2016-02, Leases. The new standard requires recognition of lease assets and lease liabilities for leases previously classified as operating leases. The guidance is effective for fiscal years beginning after December 15, 2018. While our technical analysis is ongoing, we do not expect the new standard to have a material impact to our Consolidated Statements of Operations. We expect the lease commitments discussed in Note 11, “Leases” to appear on our Consolidated Balance Sheets in the form of a lease asset and a lease liability. Such amounts are based on the present value of such commitments using our incremental borrowing rate. We plan to utilize the transition package of practical expedients permitted within the new standard, which among other things, allows us to carryforward the historical lease classification. We do not plan to elect the practical expedient to use hindsight in determining the lease term and in assessing impairment of right-of-use assets.

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Cash, Cash Equivalents and Marketable Securities

12 Months Ended

Dec. 31, 2018

Cash, Cash Equivalents and Marketable Securities [Abstract]

Cash, Cash Equivalents and Marketable Securities

2. Cash, Cash Equivalents and Marketable Securities

The following table summarizes our investments in cash equivalents and marketable securities held by investment managers and overnight investments:

	December 31,
	2018								2017
(in thousands)	Cash & Cash Equivalents			Marketable Securities		Total			Cash & Cash Equivalents			Marketable Securities		Total
Overnight holdings	$	311,158		$	—	$	311,158		$	338,112		$	—	$	338,112
Investments holdings	16,711			60,781		77,492			22,634			1,960		24,594
Cash in demand accounts	33,207			—		33,207			26,700			—		26,700
Outstanding checks	(34,303		)	—		(34,303		)	(33,186		)	—		(33,186		)
Total	$	326,773		$	60,781	$	387,554		$	354,260		$	1,960	$	356,220

Our cash and overnight holdings fluctuate based on the timing of the client’s payroll processing cycle. Included in the cash balance as of December 31, 2018 and December 31, 2017, are $224.5 million and $271.5 million, respectively, in withholdings associated with federal and state income taxes, employment taxes and other payroll deductions, as well as $34.2 million and $23.6 million, respectively, in client prepayments.

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Fair Value Measurements Fair Value Measurements (Notes)

12 Months Ended

Dec. 31, 2018

Fair Value Disclosures [Abstract]

Fair Value Disclosures [Text Block]

3. Fair Value Measurements

We account for our financial assets in accordance with ASC 820, Fair Value Measurement. This standard defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. The fair value measurement disclosures are grouped into three levels based on valuation factors:

• Level 1 - quoted prices in active markets using identical assets

• Level 2 - significant other observable inputs, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other observable inputs

• Level 3 - significant unobservable inputs

Fair Value of Instruments Measured and Recognized at Fair Value

The following tables summarize the levels of fair value measurements of our financial assets:

	December 31, 2018						December 31, 2017
(in thousands)	Total		Level 1		Level 2		Total		Level 1		Level 2
Money market funds	$	327,869	$	327,869	$	—	$	360,746	$	360,746	$	—
U.S. Treasury bills	50,147		—		50,147		—		—		—
Municipal bonds	10,634		—		10,634		1,960		—		1,960
Total	$	388,650	$	327,869	$	60,781	$	362,706	$	360,746	$	1,960

The municipal bond securities valued as Level 2 investments are primarily pre-refunded municipal bonds that are secured by escrow funds containing U.S. Government securities. Our valuation techniques used to measure fair value for these securities during the period consisted primarily of third-party pricing services that utilized actual market data such as trades of comparable bond issues, broker/dealer quotations for the same or similar investments in active markets and other observable inputs.

The following is a summary of our available-for-sale marketable securities:

(in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
December 31, 2018
U.S. Treasury bills	$	50,150	$	—	$	(3	)	$	50,147
Municipal bonds	10,641		—		(7		)	10,634
December 31, 2017
U.S. Treasury bills	$	—	$	—	$	—		$	—
Municipal bonds	1,965		—		(5		)	1,960

As of December 31, 2018, the contractual maturities of all marketable securities in our portfolio were less than one year.

Fair Value of Other Financial Instruments

The carrying amounts of cash, cash equivalents, restricted cash, accounts receivable, deposits and accounts payable approximate their fair values due to the short-term maturities of these instruments.

At December 31, 2018, the carrying value of our borrowings under our revolving credit facility approximates fair value and was classified as Level 2 in the fair value hierarchy. Please read Note 6, "Long-Term Debt," for additional information.

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Accounts Receivable

12 Months Ended

Dec. 31, 2018

Accounts Receivable Additional Disclosures [Abstract]

Accounts Receivable

4. Accounts Receivable

Accounts receivable, net consisted of the following:

	December 31,
(in thousands)	2018		2017
Trade	$	10,015	$	12,292
Unbilled	385,567		318,431
Other	5,041		3,258
Accounts receivable, net	$	400,623	$	333,981

Our accounts receivable is primarily composed of trade receivables and unbilled receivables. Our trade receivables, which represent outstanding gross billings to clients, are reported net of allowance for doubtful accounts of $1.0 million and $0.6 million as of December 31, 2018 and 2017, respectively. We establish an allowance for doubtful accounts based on management’s assessment of the collectability of specific accounts and by making a general provision for other potentially uncollectible amounts.

We make an accrual at the end of each accounting period for our obligations associated with the earned but unpaid wages of our WSEEs and for the accrued gross billings associated with such wages. These accruals are included in accrued WSEE payroll cost and unbilled accounts receivable; however, these amounts are presented net in the Consolidated Statements of Operations. We generally require clients to pay invoices for service fees no later than one day prior to the applicable payroll date. As such, we generally do not require collateral. Client prepayments directly attributable to unbilled accounts receivable have been netted against such receivables as the gross billings have been earned and the payroll cost has been incurred, thus we have the legal right of offset for these amounts. Unbilled accounts receivable consisted of the following:

	December 31,
(in thousands)	2018			2017
Accrued worksite employee payroll cost	$	329,979		$	267,402
Unbilled revenues	89,765			74,632
Customer prepayments	(34,177		)	(23,603		)
Unbilled accounts receivable	$	385,567		$	318,431

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Deposits

12 Months Ended

Dec. 31, 2018

Deposits [Abstract]

Deposits

5. Deposits

Deposits consisted of the following:

	December 31,
(in thousands)	2018		2017
Deposits – health insurance	$	6,200	$	5,300
Deposits – workers’ compensation	166,474		154,215
Deposits	$	172,674	$	159,515

The contractual arrangement with United for health insurance coverage requires us to maintain an accumulated cash surplus in the plan of $9.0 million, which is reported as long-term prepaid health insurance. Please read Note 1, “Accounting Policies,” for a discussion of our accounting policies for health insurance costs and workers’ compensation costs.

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Long-term Debt

12 Months Ended

Dec. 31, 2018

Debt Disclosure [Abstract]

Long-term Debt

6. Long-Term Debt

We have a revolving credit facility which is available for working capital and general corporate purposes, including acquisitions, stock repurchases and issuances of letters of credit. In February 2018, the revolving credit facility was increased from $200 million to $350 million and the expiration date was extended from February 2020 to February 2023 (the “Facility”). Borrowings may be increased to $400 million based on the terms and subject to the conditions set forth in the agreement relating to the Facility (the “Credit Agreement”). Our obligations under the Facility are secured by 65% of the stock of our captive insurance subsidiary and are guaranteed by all of our domestic subsidiaries. In addition, as of December 31, 2018, we had an outstanding $1.0 million letter of credit issued under the Facility. As of December 31, 2018, our outstanding balance on the Facility was $144.4 million.

The Facility matures on February 6, 2023. Borrowings under the Facility bear interest at an alternate base rate or LIBOR, at our option, plus an applicable margin. Depending on our leverage ratio, the applicable margin varies (1) in the case of LIBOR loans, from 1.50% to 2.25% and (2) in the case of alternate base rate loans, from 0.00% to 0.50%. The alternate base rate is the highest of (1) the prime rate most recently published in The Wall Street Journal, (2) the federal funds rate plus 0.50% and (3) the 30-day LIBOR rate plus 2.00%. We also pay an unused commitment fee on the average daily unused portion of the Facility at a rate of 0.25%. The average interest rate during 2018 was 3.5%. Interest expense and unused commitment fees are recorded in other income (expense).

The Facility contains both affirmative and negative covenants that we believe are customary for arrangements of this nature. Covenants include, but are not limited to, limitations on our ability to incur additional indebtedness, sell material assets, retire, redeem or otherwise reacquire our capital stock, acquire the capital stock or assets of another business, make investments and pay dividends. In addition, the Credit Agreement requires us to comply with financial covenants limiting our total funded debt, minimum interest coverage ratio and maximum leverage ratio. In November 2017 and December 2014, the Credit Agreement was amended to modify the interest coverage ratio covenant to exclude the impact of special dividends paid of $41.7 million and $50.7 million, respectively. We were in compliance with all financial covenants under the Credit Agreement at December 31, 2018.

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Income Taxes

12 Months Ended

Dec. 31, 2018

Income Tax Disclosure [Abstract]

Income Taxes

7. Income Taxes

Deferred taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities used for financial reporting purposes and the amounts used for income tax purposes. On December 22, 2017, the Tax Cuts and Jobs Act (the “2017 Tax Reform Act”) was signed into law. The 2017 Tax Reform Act significantly changed U.S. corporate income tax laws by, among other things, reducing the U.S. corporate income tax rate from 35% to 21% beginning in 2018. As a result, we remeasured our deferred tax assets at the new lower corporate income tax rate and recorded a non-cash tax charge of $2.5 million in 2017. During 2018, we finalized certain tax positions when we filed our 2017 federal tax return, and determined no further adjustments were required to our net deferred tax asset balance of $8.8 million as of December 31, 2018.

Significant components of the net deferred tax assets as reflected on the Consolidated Balance Sheets are as follows:

	December 31,
(in thousands)	2018			2017
Deferred tax liabilities
Prepaid assets	$	(3,306	)	$	(3,957	)
Depreciation	(3,918		)	(2,021		)
Software development costs	(4,950		)	(3,732		)
Intangibles	(474		)	—
Total deferred tax liabilities	(12,648		)	(9,710		)
Deferred tax assets
Accrued incentive compensation	8,612			3,510
Net operating loss carryforward	709			774
Workers’ compensation accruals	4,739			4,586
Accrued rent	918			676
Stock-based compensation	6,183			4,233
Minority investment impairment	676			667
Other	305			216
Total deferred tax assets	22,142			14,662
Valuation allowance	(678		)	(669		)
Total net deferred tax assets	21,464			13,993
Net deferred tax assets	$	8,816		$	4,283

The components of income tax expense are as follows:

	Year Ended December 31,
(in thousands)	2018			2017		2016
Current income tax expense
Federal	$	40,347		$	30,009	$	31,045
State	11,133			5,988		5,190
Total current income tax expense	51,480			35,997		36,235
Deferred income tax (benefit) expense
Federal	(3,398		)	9,549		2,641
State	(1,135		)	193		310
Total deferred income tax (benefit) expense	(4,533		)	9,742		2,951
Total income tax expense	$	46,947		$	45,739	$	39,186

In the first quarter of 2016, we prospectively adopted ASU No. 2016-09, Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting for calendar year 2016. We recognized an income tax benefit of $2.7 million in 2018, $6.8 million in 2017 and $1.5 million in 2016 related to excess tax benefits from the vesting of long-term incentive awards, restricted stock awards and non-qualified stock options.

The reconciliation of income tax expense computed at U.S. federal statutory tax rates to the reported income tax expense from continuing operations is as follows:

	Year Ended December 31,
(in thousands)	2018			2017			2016
Expected income tax expense at 21%, 35% and 35%, respectively	$	38,296		$	45,549		$	36,812
State income taxes, net of federal benefit	7,660			4,085			3,684
Nondeductible expenses	4,831			2,649			1,669
Section 199 benefits	—			(875		)	(686		)
Equity compensation	(2,737		)	(6,218		)	(1,338		)
Research and development credit	(856		)	(634		)	(751		)
Disaster employee retention credit	—			(669		)	—
Enactment of the 2017 Tax Reform Act	—			2,559			—
Other, net	(247		)	(707		)	(204		)
Reported total income tax expense	$	46,947		$	45,739		$	39,186

At December 31, 2018, we have net operating loss carryforwards totaling $2.8 million that expire from 2023 to 2030 related to an acquisition that occurred in 2010.

We recognize interest and penalties related to uncertain tax positions in income tax expense. As of December 31, 2018, 2017 and 2016, we made no provisions for interest or penalties related to uncertain tax positions. The tax years 2015 through 2017 remain open to examination by the Internal Revenue Service of the United States. The tax years 2014 through 2017 remain open to examination by various state tax authorities.

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Stockholders' Equity

12 Months Ended

Dec. 31, 2018

Stockholders' Equity Note [Abstract]

Stockholders' Equity

8. Stockholders’ Equity

Two-for-One Stock Split

On December 18, 2017, we effected a two-for-one stock split in the form of a 100% stock dividend. Share and per share amounts for 2017 and 2016 presented in these financial statements have been retroactively restated to reflect this change in our capital structure.

Repurchase Program

Our Board of Directors (the “Board”) has authorized a program to repurchase shares of our outstanding common stock (“Repurchase Program”). The purchases are to be made from time to time in the open market or directly from stockholders at prevailing market prices based on market conditions or other factors. We repurchased 1,066,409 shares under the Repurchase Program during 2018. In addition, 132,021 shares were withheld during 2018 to satisfy minimum tax withholding obligations for the vesting of restricted stock awards, which are not subject to the Repurchase Program. During 2017, we repurchased 594,974 shares under the Repurchase Program and 305,828 shares were withheld to satisfy minimum tax withholding obligations for the vesting of restricted stock awards. At December 31, 2018, we were authorized to repurchase an additional 1,611,155 shares under the Repurchase Program. Shares repurchased under the Repurchase Program are recorded in treasury.

Withheld Shares

During 2018, 132,021 shares were withheld to satisfy minimum tax withholding obligations for the vesting of long-term incentive and restricted stock awards. Shares withheld to satisfy minimum tax withholding obligations for the vesting of long-term incentive and restricted stock awards are recorded in treasury.

Tender Offer for Common Stock

In December 2015, we commenced a modified Dutch auction tender offer to purchase up to $125 million in value of our common stock at a price not less than $21.75 per share and not more than $25.00 per share. In January 2016, we exercised our right to increase the size of the tender offer by up to 2.0% of our outstanding common stock. The tender offer period expired on January 7, 2016 and on January 13, 2016, we purchased 6,027,062 shares of our common stock at a per share price of $23.75 and an aggregate price of $143.1 million, excluding $1.1 million of transaction costs. The shares were immediately canceled and retired.

The tender offer was funded through borrowings of $104.4 million under the Facility and the remainder with cash on hand.

Dividends

The Board declared quarterly dividends as follows:

(amounts per share)	2018		2017
First quarter	$	0.20	$	0.125
Second quarter	0.20		0.150
Third quarter	0.20		0.150
Fourth quarter	0.20		1.150		(1)

__________________________________

⁽¹⁾  Includes a $1.00 per share special dividend.

During 2018 and 2017, we paid a total of $33.4 million and $65.8 million, respectively in dividends. The dividends paid in 2017 includes a special dividend of $41.7 million.

Preferred Stock

At December 31, 2018, 20 million shares of preferred stock were authorized. The Series A Junior Participating Preferred Stock that was previously reserved for issuance under our Share Purchase Rights Plan expired on November 13, 2017.

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Incentive Plans

12 Months Ended

Dec. 31, 2018

Share-based Compensation [Abstract]

Incentive Plans

9. Incentive Plans

The Insperity, Inc. 2001 Incentive Plan, as amended, and the 2012 Incentive Plan, as amended, (collectively, the “Incentive Plans”) provide for options and other stock-based awards that have been and may be granted to eligible employees and non-employee directors of Insperity or its subsidiaries. The 2012 Incentive Plan is currently the only plan under which new stock-based awards may be granted. The Incentive Plans are administered by the Compensation Committee of the Board of Directors (the “Committee”). The Committee has the power to determine which eligible employees will receive awards, the timing and manner of the grant of such awards, the exercise price of stock options (which may not be less than market value on the date of grant), the number of shares and all of the terms of the awards. The Board may at any time amend or terminate the Incentive Plans. However, no amendment that would impair the rights of any participant, with respect to outstanding grants, can be made without the participant’s prior consent. Stockholder approval of amendments to the Incentive Plans is necessary only when required by applicable law or stock exchange rules. At December 31, 2018, 2,680,666 shares of common stock were available for future grants under the 2012 Incentive Plan. The 2001 Incentive Plan only has outstanding nonqualified stock options. The 2012 Incentive Plan permits stock options, including nonqualified stock options and options intended to qualify as “incentive stock options” within the meaning of Section 422 of the Internal Revenue Code, stock awards, phantom stock awards, stock appreciation rights, performance units, and other stock-based awards and cash awards, all of which may or may not be subject to the achievement of one or more performance objectives. The purpose of the Incentive Plan generally is to retain and attract persons of training, experience and ability to serve as employees of Insperity and its subsidiaries and to serve as non-employee directors of Insperity, to encourage the sense of proprietorship of such persons and to stimulate the active interest of such persons in the development and financial success of Insperity and its subsidiaries.

We also maintain the Insperity, Inc. Long-Term Incentive Program (“LTIP”) under the 2012 Incentive Plan. The LTIP provides for performance-based long-term compensation awards in the form of performance units to certain employees based on the achievement of pre-established performance goals. We granted performance units under the LTIP to our named executive officers and certain other officers in 2016, 2017 and 2018.

We recognized $20.4 million, $24.3 million and $16.6 million of compensation expense associated with the restricted stock and the LTIP awards in 2018, 2017 and 2016, respectively. Included in 2017, is $2.3 million of stock-based compensation associated with the acceleration of restricted stock awards from the first quarter of 2018 to December 2017 in order to maximize our tax deduction, which would have been limited under the 2017 Tax Reform Act. We recognized $5.3 million, $8.5 million and $6.2 million of tax benefits associated with stock-based compensation in 2018, 2017 and 2016, respectively.

Stock Option Awards

The following is a summary of stock option award activity for 2018:

	Shares (in thousands)	Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Life (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding - December 31, 2017	16	$	15.30
Granted	—	—
Exercised	—	—
Canceled	—	—
Outstanding - December 31, 2018	16	$	15.30	2.5	$	1,220
Exercisable - December 31, 2018	16	$	15.30	2.5	$	1,220

Restricted Stock Awards

Restricted common shares, under equity plan accounting, are generally measured at fair value on the date of grant based on the number of shares granted, estimated forfeitures and the quoted price of the common stock. Such value is recognized as compensation expense over the corresponding vesting period, three to five years for our shares currently outstanding. The total fair value of shares vested during the years ended December 31, 2018, 2017, and 2016 was $1.2 million, $46.0 million and $16.2 million, respectively. The weighted average grant date fair value of restricted stock awards granted during the years ended December 31, 2018, 2017 and 2016 was $65.98, $42.15 and $26.33, respectively. As of December 31, 2018, unrecognized compensation expense associated with the unvested shares outstanding was $18.4 million and is expected to be recognized over a weighted average period of 22 months.

The following is a summary of restricted stock award activity for 2018:

	Shares (in thousands)		Weighted Average Grant Date Fair Value
Non-vested - December 31, 2017	343		$	35.29
Granted	290		65.98
Vested	(14	)	66.28
Canceled/Forfeited	(37	)	41.37
Non-vested - December 31, 2018	582		$	49.48

Long-Term Incentive Program Awards

Each performance unit represents the right to receive common shares at a future date based on our performance against specified targets. The ultimate number of shares issued and the related compensation cost recognized is based on a comparison of the final performance metrics to the specified targets, which can range from 0% to 200% of the targeted amounts. A performance unit may be comprised of either a performance based award or a market-based award. For performance based awards, performance units have a vesting schedule of three years and compensation expense is recognized based on the number of common shares expected to be issued and the market price per common share on the date of grant. Over the performance period, the number of shares expected to be issued is adjusted upward or downward based upon the probability of achievement of the performance targets. For market-based awards, performance units vest at the end of a three-year period assuming continued employment and achievement of market-based performance goals. The fair value of market-based performance awards was determined through the use of the Monte Carlo simulation method. The compensation expense for the LTIP awards is recognized on a straight-line basis over the vesting terms.

The following is a summary of LTIP award activity, at 100% of targeted amount, for 2018:

	Number of Performance Units (in thousands)		Weighted Average Grant Date Fair Value
Unvested at December 31, 2017	570		$	32.90
Granted	100		81.51
Vested	(196	)	26.40
Canceled	(48	)	41.90
Unvested at December 31, 2018	426		$	46.35

The determination of achievement results and corresponding vesting of the 2015 LTIP awards occurred in February 2018 resulting in the recipients receiving 371,000 shares of common stock with a fair value $24.2 million. As of December 31, 2018, we estimate that approximately 345,000, 202,000 and 176,000 shares will vest with $0.4 million, $3.4 million and $8.6 million in unamortized compensation expense related to the 2016, 2017 and 2018 LTIP grants, respectively.

Employee Stock Purchase Plan

Our employee stock purchase plan (the “ESPP”) enables employees to purchase shares of Insperity stock at a 5% discount. The ESPP is a non-compensatory plan under generally accepted accounting principles of stock-based compensation. As a result, no compensation expense is recognized in conjunction with this plan. Approximately 30,000, 38,000 and 34,000 shares were issued from treasury under the ESPP during fiscal years 2018, 2017 and 2016, respectively.

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Net Income Per Share

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Net Income Per Share

10. Net Income Per Share

We utilize the two-class method to compute net income per share. The two-class method allocates a portion of net income to participating securities, which includes unvested awards of share-based payments with non-forfeitable rights to receive dividends. Net income allocated to unvested share-based payments is excluded from net income allocated to common shares. Any undistributed losses resulting from dividends exceeding net income are not allocated to participating securities. Basic net income per share is computed by dividing net income allocated to common shares by the weighted average number of common shares outstanding during the period. Diluted net income per share is computed by dividing net income allocated to common shares by the weighted average number of common shares outstanding during the period, plus the dilutive effect of outstanding stock options.

The following table summarizes the net income allocated to common shares and the basic and diluted shares used in the net income per share computations:

	Year Ended December 31,
(in thousands)	2018			2017			2016
Net income	$	135,413		$	84,402		$	65,991
Less distributed and undistributed earnings allocated to participating securities	(1,875		)	(1,517		)	(1,496		)
Net income allocated to common shares	$	133,538		$	82,885		$	64,495
Weighted average common shares outstanding	41,217			41,067			41,668
Incremental shares from assumed conversions of common stock options and LTIP awards	289			204			94
Adjusted weighted average common shares outstanding	41,506			41,271			41,762
Potentially dilutive securities not included in weighted average share calculation due to anti-dilutive effect	—			—			—

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Leases

12 Months Ended

Dec. 31, 2018

Leases [Abstract]

Leases

11. Leases

We lease various office facilities, equipment and vehicles under operating lease arrangements, some of which contain rent escalation clauses. Most of the leases contain purchase and/or renewal options at fair market and fair rental value, respectively. Rental expense relating to all operating leases was $15.4 million, $15.4 million and $15.0 million in 2018, 2017 and 2016, respectively. At December 31, 2018, future minimum rental payments under noncancelable operating leases are as follows:

(in thousands)	Operating Leases
2019	$	16,542
2020	16,325
2021	13,932
2022	12,791
2023	10,623
Thereafter	23,638
Total minimum lease payments	$	93,851

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Commitments and Contingencies

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

12. Commitments and Contingencies

We enter into fixed purchase and service obligations in the ordinary course of business. These arrangements primarily consist of, advertising commitments and service contracts. At December 31, 2018, future purchase and service obligations greater than $100,000 and one year were as follows (in thousands):

2019	$	16,535
2020	16,782
2021	12,494
2022	6,525
2023	1,954
Thereafter	700
Total obligations	$	54,990

Worksite Employee 401(k) Retirement Plan Class Action Litigation

In December 2015, a class action lawsuit was filed against us and the third-party discretionary trustee of the Insperity 401(k) retirement plan that is available to eligible worksite employees (the “Plan”) in the United States District Court for the Northern District of Georgia, Atlanta Division, on behalf of Plan participants. The suit generally alleges that Insperity’s third-party discretionary trustee of the Plan and Insperity breached their fiduciary duties to plan participants by selecting an Insperity subsidiary to serve as the recordkeeper for the Plan, by causing participants in the Plan to pay excessive recordkeeping fees to the Insperity subsidiary, by failing to monitor other fiduciaries, and by making imprudent investment choices. The parties filed a stipulation concerning class certification that defined the class as “all participants and beneficiaries of the Insperity 401(k) Plan from December 22, 2009 through September 30, 2017.” In November 2017, the court approved the class certification stipulation and denied the plaintiffs’ request for a jury trial. A date for the bench trial has not yet been set. Discovery is complete. On June 8, 2018, we filed a motion for summary judgment seeking dismissal of all claims. Briefing on that motion was completed in September 2018, which motion is now awaiting a ruling by the court. We believe we have meritorious defenses, and we intend to vigorously defend this litigation. As a result of uncertainty regarding the outcome of this matter, no provision has been made in the accompanying consolidated financial statements.

Other Litigation

We are a defendant in various other lawsuits and claims arising in the normal course of business. Management believes it has valid defenses in these cases and is defending them vigorously. While the results of litigation cannot be predicted with certainty, management believes the final outcome of such litigation will not have a material adverse effect on our financial position or results of operations.

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Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2018

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Data (Unaudited)

13. Quarterly Financial Data (Unaudited)

	Quarter Ended
(in thousands, except per share amounts)	March 31		June 30		Sept. 30		Dec. 31
2018
Revenues	$	1,014,372	$	922,295	$	925,126	$	966,756
Gross profit	199,720		154,544		166,054		161,591
Operating income	64,703		33,581		48,133		32,619
Net income	49,991		24,560		36,207		24,655
Basic net income per share	1.20		0.59		0.86		0.59
Diluted net income per share	1.18		0.58		0.86		0.59
2017
Revenues	$	882,664	$	795,552	$	795,513	$	826,494
Gross profit	159,346		130,553		139,966		142,866
Operating income	53,492		22,938		29,799		23,712
Net income	35,628		14,018		19,202		15,554
Basic net income per share(1)	0.85		0.34		0.46		0.36
Diluted net income per share(1)	0.85		0.33		0.46		0.36

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⁽¹⁾  Adjusted to reflect the two-for-one split of our common stock effected on December 18, 2017 as a stock dividend.

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Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Description of Business

Description of Business

Insperity, Inc. (“Insperity” or “we”, “our”, and “us”) provides an array of human resources (“HR”) and business solutions designed to help improve business performance. Since our formation in 1986, we have evolved from being solely a professional employer organization (“PEO”), an industry we pioneered, to our current position as a comprehensive business performance solutions provider. We were organized as a corporation in 1986 and have provided PEO services since inception.

Our most comprehensive HR services offerings are provided through our Workforce Optimization^® and Workforce Synchronization^TM solutions (together, our “PEO HR Outsourcing solutions”), which encompass a broad range of human resources functions, including payroll and employment administration, employee benefits, workers’ compensation, government compliance, performance management and training and development services, along with our cloud-based human capital management platform, Insperity Premier^TM.

In addition to our PEO HR Outsourcing solutions, we also offer a comprehensive traditional payroll and human capital management solution, known as Workforce Acceleration. We also offer a number of other business performance solutions, including Time and Attendance, Performance Management, Organizational Planning, Recruiting Services, Employment Screening, Expense Management, Retirement Services and Insurance Services, many of which are offered via desktop applications and cloud-based delivery models. These other products or services are offered separately or with our other solutions.

We provide our PEO HR Outsourcing solutions by entering into a co-employment relationship with our clients, under which Insperity and its clients each take responsibility for certain portions of the employer-employee relationship. Insperity and its clients designate each party’s responsibilities through its Client Service Agreement (“CSA”), under which Insperity becomes an employer of the employees who work at the client’s location (“WSEE”) for most administrative and regulatory purposes.

As a co-employer of its WSEEs, we assume many of the rights and obligations associated with being an employer. We enter into an employment agreement with each WSEE, thereby maintaining a variety of employer rights, including the right to hire or terminate employees, the right to evaluate employee qualifications or performance, and the right to establish employee compensation levels. Typically, Insperity only exercises these rights in consultation with its clients or when necessary to ensure regulatory compliance. The responsibilities associated with our role as employer include the following obligations with regard to our WSEEs: (1) to compensate its WSEEs through wages and salaries; (2) to pay the employer portion of payroll-related taxes; (3) to withhold and remit (where applicable) the employee portion of payroll-related taxes; (4) to provide employee benefit programs; and (5) to provide workers’ compensation insurance coverage.

In addition to our assumption of employer status for our WSEEs, our PEO HR Outsourcing solutions also include other human resources functions for our clients to support the effective and efficient use of personnel in their business operations. To provide these functions, we maintain a significant staff of professionals trained in a wide variety of human resources functions, including employee training, employee recruiting, employee performance management, employee compensation and employer liability management. These professionals interact and consult with clients on a daily basis to help identify each client’s service requirements and to ensure that we are providing appropriate and timely personnel management services.

Revenue and Direct Cost Recognition

Revenue and Direct Cost Recognition

On January 1, 2018, we adopted Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers (Topic 606) using the modified retrospective approach. Under this method, the guidance is applied only to the most current period presented in the financial statements. ASU No. 2014-09 outlines a single comprehensive revenue recognition model for revenue arising from contracts with customers and superseded most of the previous revenue recognition guidance, including industry-specific guidance. Under ASU No. 2014-09, an entity recognizes revenue for the transfer of promised goods or services to customers in an amount that reflects the consideration for which the entity expects to be entitled in exchange for those goods or services. Our revenue recognition policies remained substantially unchanged as a result of the adoption of ASU No. 2014-09 and we did not have any significant changes in our business processes or systems.

We enter into contracts with our customers for human resources services based on a stated rate and price in the contract. Our contracts generally have a term of 12 months, but are cancellable at any time by either party with 30-days’ notice. Our performance obligations are satisfied as services are rendered each month. The term between invoicing and when our performance obligations are satisfied is not significant. Payment terms are typically due concurrently with the invoicing of our PEO services. We do not have significant financing components or significant payment terms.

Our revenue is generally recognized ratably over the payroll period as WSEEs perform their service at the client worksite. Customers are invoiced concurrently with each periodic payroll of its WSEEs. Revenues that have been recognized but not invoiced represent unbilled accounts receivable included in accounts receivable, net on our Consolidated Balance Sheets.

Pursuant to the practical expedients provided under ASU No 2014-09, we expense sales commissions when incurred because the terms of our contracts are cancellable by either party with a 30-day notice. These costs are recorded in commissions in our Consolidated Statements of Operations.

Our revenue for our PEO HR Outsourcing solutions by geographic region and for our other products and services offerings are as follows:

	Year Ended December 31,
(in thousands)	2018		2017		2016
Northeast	$	996,541	$	854,629	$	750,748
Southeast	447,584		379,874		318,185
Central	637,779		543,486		467,297
Southwest	895,243		767,207		689,334
West	797,942		702,619		664,308
	3,775,089		3,247,815		2,889,872
Other revenue	53,460		52,408		51,475
Total revenue	$	3,828,549	$	3,300,223	$	2,941,347

Our PEO HR Outsourcing solutions revenues are primarily derived from our gross billings, which are based on (1) the payroll cost of its WSEEs; and (2) a markup computed as a percentage of the payroll cost. The gross billings are invoiced concurrently with each periodic payroll of its WSEEs. Revenues, which exclude the payroll cost component of gross billings and therefore consist solely of markup, are recognized ratably over the payroll period as WSEEs perform their service at the client worksite.

In determining the pricing of the markup component of our gross billings, we take into consideration our estimates of the costs directly associated with our WSEEs, including payroll taxes, benefits and workers’ compensation costs, plus an acceptable gross profit margin. As a result, our operating results are significantly impacted by our ability to accurately estimate, control and manage our direct costs relative to the revenues derived from the markup component of our gross billings.

Consistent with our revenue recognition policy, our direct costs do not include the payroll cost of our WSEEs. Our direct costs associated with our revenue generating activities are primarily comprised of all other costs related to our WSEEs, such as the employer portion of payroll-related taxes, employee benefit plan premiums and workers’ compensation insurance costs.

Segment Reporting

Segment Reporting

We operate one reportable segment under ASC 280, Segment Reporting.

Principles of Consolidation

Principles of Consolidation

The Consolidated Financial Statements include the accounts of Insperity, Inc. and its wholly owned subsidiaries. Intercompany accounts and transactions have been eliminated in consolidation.

Use of Estimates

Use of Estimates

The preparation of financial statements in conformity with United States Generally Accepted Accounting Principles requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.

Concentrations of Credit Risk

Concentrations of Credit Risk

Financial instruments that could potentially subject us to concentration of credit risk include accounts receivable and marketable securities.

Cash, Cash Equivalents and Marketable Securities

Cash, Cash Equivalents and Marketable Securities

We invest our excess cash in federal government and municipal-based money market funds and debt instruments of U.S. municipalities. All highly liquid investments with stated maturities of three months or less from date of purchase are classified as cash equivalents. Liquid investments with stated maturities of greater than three months are classified as marketable securities in current assets.

We account for marketable securities in accordance with ASC 320, Investments – Debt and Equity Securities. We determine the appropriate classification of all marketable securities as held-to-maturity, available-for-sale or trading at the time ofpurchase, and re-evaluate such classification as of each balance sheet date. At December 31, 2018 and 2017, all of our investments in marketable securities were classified as available-for-sale, and as a result, were reported at fair value. Unrealized gains and losses are reported as a component of accumulated other comprehensive income (loss) in stockholders’ equity. The amortized cost of debt securities is adjusted for amortization of premiums and accretion of discounts from the date of purchase to maturity. Such amortization is included in interest income as an addition to or deduction from the coupon interest earned on the investments. We use the specific identification method of determining the cost basis in computing realized gains and losses on the sale of our available-for-sale securities. Realized gains and losses are included in other income.

Property and Equipment

Property and Equipment

Property and equipment are recorded at cost and are depreciated over the estimated useful lives of the related assets using the straight-line method.

Property and equipment, net consisted of the following:

(in thousands)	December 31, 2018			December 31, 2017
Land	$	6,215		$	6,215
Buildings and improvements	112,308			95,615
Computer hardware and software	115,259			105,060
Software development costs	71,332			60,568
Furniture, fixtures and other	45,694			42,891
	350,808			310,349
Accumulated depreciation and amortization	(233,595		)	(214,690		)
Total property and equipment, net	$	117,213		$	95,659

The estimated useful lives of property and equipment for purposes of computing depreciation are as follows:

	Useful Life
Buildings and improvements	5-30 years
Computer hardware and software	2-5 years
Software development costs	3-5 years
Furniture, fixtures and other	5-7 years

Software development costs relate primarily to software code development, systems integration and testing of our proprietary professional employer information systems and are accounted for in accordance with ASC 350-40, Internal Use Software. Capitalized software development costs are amortized using the straight-line method over the estimated useful lives of the software, generally three years. We recognized $6.0 million, $4.1 million and $3.0 million in amortization of capitalized computer software costs in 2018, 2017 and 2016, respectively. Unamortized software development costs were $19.6 million and $14.9 million in 2018 and 2017, respectively.

We account for our software products in accordance with ASC 985-20, Costs of Software to be Sold. This Topic establishes standards of financial accounting and reporting for the costs of computer software to be sold, leased, or otherwise marketed as a separate product or as part of a product or process, whether internally developed and produced or purchased.

We periodically evaluate our long-lived assets for impairment in accordance with ASC 360-10, Property, Plant, and Equipment. ASC 360-10 requires that an impairment loss be recognized for assets to be disposed of or held-for-use when the carrying amount of an asset is deemed to not be recoverable. If events or circumstances were to indicate that any of our long-lived assets might be impaired, we would assess recoverability based on the estimated undiscounted future cash flows to be generated from the applicable asset. In addition, we may record an impairment loss to the extent that the carrying value of the asset exceeded the fair value of the asset. Fair value is generally determined using an estimate of discounted future net cash flows from operating activities or upon disposal of the asset.

Goodwill and Other Intangible Assets

Goodwill and Other Intangible Assets

Our goodwill is not amortized, but is tested for impairment on an annual basis or when there is an indication that there has been a potential decline in the fair value of a reporting unit. Annually, we perform a qualitative analysis to determine if it is more likely than not that the fair value has declined below its carrying value. This analysis considers various qualitative factors. Due to the nature of our business, all of our goodwill is associated with one reporting unit. We perform our annual impairment testing during the fourth quarter. Based on the results of our analysis, no impairment loss was recognized in 2018, 2017 or 2016.

At December 31, 2018 and 2017, we had an aggregate carrying amount of goodwill acquired of $21.2 million, which has been reduced by cumulative impairment charges of $8.5 million. Accordingly our goodwill balance at December 31, 2018 and 2017 was $12.7 million.

Health Insurance Costs

Health Insurance Costs

We provide group health insurance coverage to our WSEEs through a national network of carriers including UnitedHealthcare (“United”), UnitedHealthcare of California, Kaiser Permanente, Blue Shield of California, HMSA BlueCross BlueShield of Hawaii and Tufts, all of which provide fully insured policies or service contracts.

The policy with United provides the majority of our health insurance coverage. As a result of certain contractual terms, we have accounted for this plan since its inception using a partially self-funded insurance accounting model. Accordingly, we record the cost of the United portion of the plan, including an estimate of the incurred claims, taxes and administrative fees (collectively the “Plan Costs”) as benefits expense, a component of direct costs, in the Consolidated Statements of Operations. The estimated incurred claims are based upon: (1) the level of claims processed during each quarter; (2) estimated completion rates based upon recent claim development patterns under the plan; and (3) the number of participants in the plan, including both active and COBRA enrollees. Each reporting period, changes in the estimated ultimate costs resulting from claim trends, plan design and migration, participant demographics and other factors are incorporated into the benefits costs.

Additionally, since the plan’s inception, under the terms of the contract, United establishes cash funding rates 90 days in advance of the beginning of a reporting quarter. If the Plan Costs for a reporting quarter are greater than the premiums paid and owed to United, a deficit in the plan would be incurred and a liability for the excess costs would be accrued in our Consolidated Balance Sheets. On the other hand, if the Plan Costs for the reporting quarter are less than the premiums paid and owed to United, a surplus in the plan would be incurred and we would record an asset for the excess premiums in our Consolidated Balance Sheets. The terms of the arrangement require us to maintain an accumulated cash surplus in the plan of $9.0 million, which is reported as long-term prepaid insurance. In addition, United requires a deposit equal to approximately one day of claims funding activity, which was $6.0 million as of December 31, 2018, and is reported as a long-term asset. As of December 31, 2018, Plan Costs were more than the net premiums paid and owed to United by $6.3 million. As this amount is less than the agreed-upon $9.0 million surplus maintenance level, the $15.3 million difference is also included in accrued health insurance costs, a current liability, in our Consolidated Balance Sheets. The premiums, including the additional quarterly premiums, owed to United at December 31, 2018, were $15.2 million, which is included in accrued health insurance costs, a current liability in our Consolidated Balance Sheets. Our benefits costs incurred included a reduction of $1.3 million in 2018, an increase of $1.2 million in 2017 and an increase of $5.1 million in 2016 for changes in estimated run-off related to prior periods.

Workers' Compensation Costs

Workers’ Compensation Costs

Our workers’ compensation coverage for our WSEEs in our PEO HR Outsourcing solutions has been provided through an arrangement with the Chubb Group of Insurance Companies or its predecessors (the “Chubb Program”) since 2007. The Chubb Program is fully insured in that Chubb has the responsibility to pay all claims incurred under the policy regardless of whether we satisfy our responsibilities. Under the Chubb Program, we have financial responsibility to Chubb for the first $1 million layer of claims per occurrence and, for claims over $1 million, up to a maximum aggregate amount of $6 million per policy year for claims that exceed $1 million. Chubb bears the financial responsibility for all claims in excess of these levels.

Because we bear the financial responsibility for claims up to the levels noted above, such claims, which are the primary component of our workers’ compensation costs, are recorded in the period incurred. Workers’ compensation insurance includes ongoing health care and indemnity coverage whereby claims are paid over numerous years following the date of injury. Accordingly, the accrual of related incurred costs in each reporting period includes estimates, which take into account the ongoing development of claims and therefore requires a significant level of judgment.

We utilize a third-party actuary to estimate our loss development rate, which is primarily based upon the nature of WSEEs’ job responsibilities, the location of WSEEs, the historical frequency and severity of workers’ compensation claims, and an estimate of future cost trends. Each reporting period, changes in the actuarial assumptions resulting from changes in actual claims experience and other trends are incorporated into our workers’ compensation claims cost estimates. During the years ended December 31, 2018, 2017 and 2016, we reduced accrued workers’ compensation costs by $18.8 million, $16.3 million and $10.9 million, respectively, for changes in estimated losses related to prior reporting periods. Workers’ compensation cost estimates are discounted to present value at a rate based upon the U.S. Treasury rates that correspond with the weighted average estimated claim payout period (the average discount rate was 2.6% in 2018 and 1.6% in 2017) are accreted over the estimated claim payment period and included as a component of direct costs in our Consolidated Statements of Operations.

The following table provides the activity and balances related to incurred but not paid workers’ compensation claims:

	Year Ended December 31,
(in thousands)	2018			2017
Beginning balance	$	207,630		$	183,928
Accrued claims	72,066			68,194
Present value discount	(7,829		)	(4,308		)
Paid claims	(42,228		)	(40,184		)
Ending balance	$	229,639		$	207,630
Current portion of accrued claims	$	42,227		$	41,137
Long-term portion of accrued claims	187,412			166,493
Total accrued claims	$	229,639		$	207,630

The current portion of accrued workers’ compensation costs at December 31, 2018 and 2017 includes $3.6 million and $1.8 million, respectively, of workers’ compensation administrative fees.

The undiscounted accrued workers’ compensation costs were $247.4 million as of December 31, 2018 and $219.9 million as of December 31, 2017.

At the beginning of each policy period, the workers’ compensation insurance carrier establishes monthly funding requirements comprised of premium costs and funds to be set aside for payment of future claims (“claim funds”). The level of claim funds is primarily based upon anticipated WSEE payroll levels and expected workers’ compensation loss rates, as determined by the insurance carrier. Monies funded into the program for incurred claims expected to be paid within one year are recorded as restricted cash, a short-term asset, while the remainder of claim funds are included in deposits, a long-term asset in our Consolidated Balance Sheets. In 2018, we received $19.4 million for the return of excess claim funds related to the workers’ compensation program, which decreased deposits. As of December 31, 2018, we had restricted cash of $42.2 million and deposits of $166.5 million.

Our estimate of incurred claim costs expected to be paid within one year is included in short-term liabilities, while our estimate of incurred claim costs expected to be paid beyond one year is included in noncurrent liabilities on our Consolidated Balance Sheets.

Stock-Based Compensation

Stock-Based Compensation

At December 31, 2018, we have one stock-based employee compensation plan under which we may issue awards. We account for this plan under the recognition and measurement principles of ASC 718, Compensation – Stock Compensation, which requires all share-based payments to employees, including grants of employee stock options, to be recognized in the income statement based on their fair values.

We generally make annual grants of restricted and unrestricted stock under our stock-based incentive compensation plan to our non-employee directors, officers and other management. Restricted stock grants to officers and other management generally vest over a period of three years from the date of grant. Shares of restricted stock are valued based on the fair value on date of grant and the associated expense, net of estimated forfeitures, is recognized over the vesting period. Commencing in 2017, stock grants issued to non-employee directors upon their initial appointment to the board are 100% vested on the grant date. Annual stock grants issued to non-employee directors are 100% vested on the grant date.

Our Insperity Long-Term Incentive Program (the “LTIP”) provides for performance based long-term compensation awards in the form of performance units to certain employees based on the achievement of pre-established performance goals. Each performance unit represents the right to receive one common share at a future date based on our performance against certain targets. Performance units have a vesting schedule of three years. Commencing in 2016, a portion of the LTIP grant to employees was considered a market-based performance award that vests at the end of a three-year period assuming continued employment and achievement of market-based performance goals. The fair value of each performance unit is the market price of our common stock on the date of grant. The fair value of each market-based performance unit was determined through use of the Monte Carlo simulation method. The compensation expense for such awards is recognized on a straight line basis over the vesting term. Over the performance period the number of shares expected to be issued is adjusted upward or downward based on the probability of achievement of the performance target.

Company-Sponsored 401(k) Plans

Company-Sponsored 401(k) Retirement Plans

Under our 401(k) retirement plan for corporate employees (the “Corporate Plan”), we matched 100% of eligible corporate employees’ contributions, up to 6% of the employees’ eligible compensation in 2018, 2017 and 2016. Matching contributions under the Corporate Plan are immediately vested. During 2018, 2017 and 2016, we made matching contributions on behalf of corporate employees to the Corporate Plan of $10.3 million, $8.7 million and $8.0 million, respectively, and is included in salaries, wages and payroll taxes in our Consolidated Statements of Operations.

Under our separate 401(k) retirement plan for WSEEs (the “Worksite Employee Plan”), the match percentage for WSEEs ranges from 0% to 6%, as determined by each client company. Matching contributions under the Worksite Employee Plan are immediately vested. During 2018, 2017 and 2016, we made matching contributions on behalf of WSEEs to the Worksite Employee Plan of $165.5 million, $129.0 million and $108.3 million, respectively.

Advertising

Advertising

We expense all advertising costs as incurred.

Income Taxes

Income Taxes

We use the liability method in accounting for income taxes. Under this method, deferred tax assets and liabilities are determined based on differences between financial reporting and income tax carrying amounts of assets and liabilities and are measured using the enacted tax rates and laws in effect when the differences are expected to reverse. On December 22, 2017, the Tax Cuts and Jobs Act (the “2017 Tax Reform Act”) was signed into law. The 2017 Tax Reform Act significantly changes U.S. corporate income tax laws by, among other things, reducing the U.S. corporate income tax rate to 21% beginning in 2018. Please read Note 7, “Income Taxes,” for additional information.

Reclassification, Policy

Reclassifications

Certain prior year amounts have been reclassified to conform to the 2018 presentation.

New Accounting Pronouncements

New Accounting Pronouncements

In February 2016, the FASB issued ASU No. 2016-02, Leases. The new standard requires recognition of lease assets and lease liabilities for leases previously classified as operating leases. The guidance is effective for fiscal years beginning after December 15, 2018. While our technical analysis is ongoing, we do not expect the new standard to have a material impact to our Consolidated Statements of Operations. We expect the lease commitments discussed in Note 11, “Leases” to appear on our Consolidated Balance Sheets in the form of a lease asset and a lease liability. Such amounts are based on the present value of such commitments using our incremental borrowing rate. We plan to utilize the transition package of practical expedients permitted within the new standard, which among other things, allows us to carryforward the historical lease classification. We do not plan to elect the practical expedient to use hindsight in determining the lease term and in assessing impairment of right-of-use assets.

Fair Value of Financial Instruments

We account for our financial assets in accordance with ASC 820, Fair Value Measurement. This standard defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. The fair value measurement disclosures are grouped into three levels based on valuation factors:

• Level 1 - quoted prices in active markets using identical assets

• Level 2 - significant other observable inputs, such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other observable inputs

• Level 3 - significant unobservable inputs

Fair Value of Other Financial Instruments

Fair Value of Other Financial Instruments

The carrying amounts of cash, cash equivalents, restricted cash, accounts receivable, deposits and accounts payable approximate their fair values due to the short-term maturities of these instruments.

At December 31, 2018, the carrying value of our borrowings under our revolving credit facility approximates fair value and was classified as Level 2 in the fair value hierarchy. Please read Note 6, "Long-Term Debt," for additional information.

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Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Disaggregation of Revenue [Table Text Block]

Our revenue for our PEO HR Outsourcing solutions by geographic region and for our other products and services offerings are as follows:

	Year Ended December 31,
(in thousands)	2018		2017		2016
Northeast	$	996,541	$	854,629	$	750,748
Southeast	447,584		379,874		318,185
Central	637,779		543,486		467,297
Southwest	895,243		767,207		689,334
West	797,942		702,619		664,308
	3,775,089		3,247,815		2,889,872
Other revenue	53,460		52,408		51,475
Total revenue	$	3,828,549	$	3,300,223	$	2,941,347

Property, Plant and Equipment [Table Text Block]

Property and equipment, net consisted of the following:

(in thousands)	December 31, 2018			December 31, 2017
Land	$	6,215		$	6,215
Buildings and improvements	112,308			95,615
Computer hardware and software	115,259			105,060
Software development costs	71,332			60,568
Furniture, fixtures and other	45,694			42,891
	350,808			310,349
Accumulated depreciation and amortization	(233,595		)	(214,690		)
Total property and equipment, net	$	117,213		$	95,659

Estimated Useful Lives of Property and Equipment

The estimated useful lives of property and equipment for purposes of computing depreciation are as follows:

	Useful Life
Buildings and improvements	5-30 years
Computer hardware and software	2-5 years
Software development costs	3-5 years
Furniture, fixtures and other	5-7 years

Activity and Balances Related to Incurred But Not Paid Worker's Compensation Claims

The following table provides the activity and balances related to incurred but not paid workers’ compensation claims:

	Year Ended December 31,
(in thousands)	2018			2017
Beginning balance	$	207,630		$	183,928
Accrued claims	72,066			68,194
Present value discount	(7,829		)	(4,308		)
Paid claims	(42,228		)	(40,184		)
Ending balance	$	229,639		$	207,630
Current portion of accrued claims	$	42,227		$	41,137
Long-term portion of accrued claims	187,412			166,493
Total accrued claims	$	229,639		$	207,630

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Cash, Cash Equivalents and Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2018

Cash, Cash Equivalents and Marketable Securities [Abstract]

Summary of investments in cash, cash equivalents and marketable securities

2. Cash, Cash Equivalents and Marketable Securities

The following table summarizes our investments in cash equivalents and marketable securities held by investment managers and overnight investments:

	December 31,
	2018								2017
(in thousands)	Cash & Cash Equivalents			Marketable Securities		Total			Cash & Cash Equivalents			Marketable Securities		Total
Overnight holdings	$	311,158		$	—	$	311,158		$	338,112		$	—	$	338,112
Investments holdings	16,711			60,781		77,492			22,634			1,960		24,594
Cash in demand accounts	33,207			—		33,207			26,700			—		26,700
Outstanding checks	(34,303		)	—		(34,303		)	(33,186		)	—		(33,186		)
Total	$	326,773		$	60,781	$	387,554		$	354,260		$	1,960	$	356,220

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Fair Value Measurements Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2018

Fair Value Disclosures [Abstract]

Marketable Securities [Table Text Block]

Fair Value of Instruments Measured and Recognized at Fair Value

The following tables summarize the levels of fair value measurements of our financial assets:

	December 31, 2018						December 31, 2017
(in thousands)	Total		Level 1		Level 2		Total		Level 1		Level 2
Money market funds	$	327,869	$	327,869	$	—	$	360,746	$	360,746	$	—
U.S. Treasury bills	50,147		—		50,147		—		—		—
Municipal bonds	10,634		—		10,634		1,960		—		1,960
Total	$	388,650	$	327,869	$	60,781	$	362,706	$	360,746	$	1,960

Available-for-sale Securities [Table Text Block]

The following is a summary of our available-for-sale marketable securities:

(in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
December 31, 2018
U.S. Treasury bills	$	50,150	$	—	$	(3	)	$	50,147
Municipal bonds	10,641		—		(7		)	10,634
December 31, 2017
U.S. Treasury bills	$	—	$	—	$	—		$	—
Municipal bonds	1,965		—		(5		)	1,960

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Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2018

Accounts Receivable Additional Disclosures [Abstract]

Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]

Accounts receivable, net consisted of the following:

	December 31,
(in thousands)	2018		2017
Trade	$	10,015	$	12,292
Unbilled	385,567		318,431
Other	5,041		3,258
Accounts receivable, net	$	400,623	$	333,981

Unbilled accounts receivable

Client prepayments directly attributable to unbilled accounts receivable have been netted against such receivables as the gross billings have been earned and the payroll cost has been incurred, thus we have the legal right of offset for these amounts. Unbilled accounts receivable consisted of the following:

	December 31,
(in thousands)	2018			2017
Accrued worksite employee payroll cost	$	329,979		$	267,402
Unbilled revenues	89,765			74,632
Customer prepayments	(34,177		)	(23,603		)
Unbilled accounts receivable	$	385,567		$	318,431

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Deposits Deposits (Tables)

12 Months Ended

Dec. 31, 2018

Statement of Financial Position [Abstract]

Deposit Asset, Type [Table Text Block]

Deposits consisted of the following:

	December 31,
(in thousands)	2018		2017
Deposits – health insurance	$	6,200	$	5,300
Deposits – workers’ compensation	166,474		154,215
Deposits	$	172,674	$	159,515

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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Income Tax Disclosure [Abstract]

Significant components of net deferred tax assets and net deferred tax liabilities

Significant components of the net deferred tax assets as reflected on the Consolidated Balance Sheets are as follows:

	December 31,
(in thousands)	2018			2017
Deferred tax liabilities
Prepaid assets	$	(3,306	)	$	(3,957	)
Depreciation	(3,918		)	(2,021		)
Software development costs	(4,950		)	(3,732		)
Intangibles	(474		)	—
Total deferred tax liabilities	(12,648		)	(9,710		)
Deferred tax assets
Accrued incentive compensation	8,612			3,510
Net operating loss carryforward	709			774
Workers’ compensation accruals	4,739			4,586
Accrued rent	918			676
Stock-based compensation	6,183			4,233
Minority investment impairment	676			667
Other	305			216
Total deferred tax assets	22,142			14,662
Valuation allowance	(678		)	(669		)
Total net deferred tax assets	21,464			13,993
Net deferred tax assets	$	8,816		$	4,283

Components of income tax expense

The components of income tax expense are as follows:

	Year Ended December 31,
(in thousands)	2018			2017		2016
Current income tax expense
Federal	$	40,347		$	30,009	$	31,045
State	11,133			5,988		5,190
Total current income tax expense	51,480			35,997		36,235
Deferred income tax (benefit) expense
Federal	(3,398		)	9,549		2,641
State	(1,135		)	193		310
Total deferred income tax (benefit) expense	(4,533		)	9,742		2,951
Total income tax expense	$	46,947		$	45,739	$	39,186

Reconciliation of income tax expense

The reconciliation of income tax expense computed at U.S. federal statutory tax rates to the reported income tax expense from continuing operations is as follows:

	Year Ended December 31,
(in thousands)	2018			2017			2016
Expected income tax expense at 21%, 35% and 35%, respectively	$	38,296		$	45,549		$	36,812
State income taxes, net of federal benefit	7,660			4,085			3,684
Nondeductible expenses	4,831			2,649			1,669
Section 199 benefits	—			(875		)	(686		)
Equity compensation	(2,737		)	(6,218		)	(1,338		)
Research and development credit	(856		)	(634		)	(751		)
Disaster employee retention credit	—			(669		)	—
Enactment of the 2017 Tax Reform Act	—			2,559			—
Other, net	(247		)	(707		)	(204		)
Reported total income tax expense	$	46,947		$	45,739		$	39,186

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Stockholders' Equity Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2018

Stockholders' Equity Attributable to Parent [Abstract]

QuarterlydividendsdeclaredTableTextBlock [Table Text Block]

Dividends

The Board declared quarterly dividends as follows:

(amounts per share)	2018		2017
First quarter	$	0.20	$	0.125
Second quarter	0.20		0.150
Third quarter	0.20		0.150
Fourth quarter	0.20		1.150		(1)

__________________________________

⁽¹⁾  Includes a $1.00 per share special dividend.

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Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2018

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of stock option award activity

The following is a summary of stock option award activity for 2018:

	Shares (in thousands)	Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Life (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding - December 31, 2017	16	$	15.30
Granted	—	—
Exercised	—	—
Canceled	—	—
Outstanding - December 31, 2018	16	$	15.30	2.5	$	1,220
Exercisable - December 31, 2018	16	$	15.30	2.5	$	1,220

Restricted Stock [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of restricted stock awards activity

The following is a summary of restricted stock award activity for 2018:

	Shares (in thousands)		Weighted Average Grant Date Fair Value
Non-vested - December 31, 2017	343		$	35.29
Granted	290		65.98
Vested	(14	)	66.28
Canceled/Forfeited	(37	)	41.37
Non-vested - December 31, 2018	582		$	49.48

Long-Term Incentive Program Awards [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Summary of restricted stock awards activity

The following is a summary of LTIP award activity, at 100% of targeted amount, for 2018:

	Number of Performance Units (in thousands)		Weighted Average Grant Date Fair Value
Unvested at December 31, 2017	570		$	32.90
Granted	100		81.51
Vested	(196	)	26.40
Canceled	(48	)	41.90
Unvested at December 31, 2018	426		$	46.35

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Net Income Per Share (Tables)

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Summary of the net income allocated to common shares and the basic and diluted shares used in the net income per share computations

The following table summarizes the net income allocated to common shares and the basic and diluted shares used in the net income per share computations:

	Year Ended December 31,
(in thousands)	2018			2017			2016
Net income	$	135,413		$	84,402		$	65,991
Less distributed and undistributed earnings allocated to participating securities	(1,875		)	(1,517		)	(1,496		)
Net income allocated to common shares	$	133,538		$	82,885		$	64,495
Weighted average common shares outstanding	41,217			41,067			41,668
Incremental shares from assumed conversions of common stock options and LTIP awards	289			204			94
Adjusted weighted average common shares outstanding	41,506			41,271			41,762
Potentially dilutive securities not included in weighted average share calculation due to anti-dilutive effect	—			—			—

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Leases (Tables)

12 Months Ended

Dec. 31, 2018

Leases [Abstract]

Future minimum rental payments under non cancelable operating leases

At December 31, 2018, future minimum rental payments under noncancelable operating leases are as follows:

(in thousands)	Operating Leases
2019	$	16,542
2020	16,325
2021	13,932
2022	12,791
2023	10,623
Thereafter	23,638
Total minimum lease payments	$	93,851

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Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Future non-cancelable purchase and service obligations

At December 31, 2018, future purchase and service obligations greater than $100,000 and one year were as follows (in thousands):

2019	$	16,535
2020	16,782
2021	12,494
2022	6,525
2023	1,954
Thereafter	700
Total obligations	$	54,990

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Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2018

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Data

	Quarter Ended
(in thousands, except per share amounts)	March 31		June 30		Sept. 30		Dec. 31
2018
Revenues	$	1,014,372	$	922,295	$	925,126	$	966,756
Gross profit	199,720		154,544		166,054		161,591
Operating income	64,703		33,581		48,133		32,619
Net income	49,991		24,560		36,207		24,655
Basic net income per share	1.20		0.59		0.86		0.59
Diluted net income per share	1.18		0.58		0.86		0.59
2017
Revenues	$	882,664	$	795,552	$	795,513	$	826,494
Gross profit	159,346		130,553		139,966		142,866
Operating income	53,492		22,938		29,799		23,712
Net income	35,628		14,018		19,202		15,554
Basic net income per share(1)	0.85		0.34		0.46		0.36
Diluted net income per share(1)	0.85		0.33		0.46		0.36

____________________________________

⁽¹⁾  Adjusted to reflect the two-for-one split of our common stock effected on December 18, 2017 as a stock dividend.

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Accounting Policies (Details)	3 Months Ended								12 Months Ended
	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2018 USD ($)		Dec. 31, 2017 USD ($)		Dec. 31, 2016 USD ($)		Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Oct. 01, 2010 USD ($)	Sep. 30, 2010 USD ($)
Disaggregation of Revenue [Line Items]
Revenues(1)	$ 966,756,000	$ 925,126,000	$ 922,295,000	$ 1,014,372,000	$ 826,494,000	$ 795,513,000	$ 795,552,000	$ 882,664,000	$ 3,828,549,000	[1]	$ 3,300,223,000	[1]	$ 2,941,347,000	[1]
Segment Reporting [Abstract]
Number of reportable segments (integer)									1
Property, Plant and Equipment [Line Items]
Land															$ 6,215,000	$ 6,215,000
Buildings and Improvements, Gross															112,308,000	95,615,000
Computer hardware and software															115,259,000	105,060,000
Software development costs															71,332,000	60,568,000
Property, Plant and Equipment, Gross															350,808,000	310,349,000
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment															(233,595,000)	(214,690,000)
Furniture and Fixtures, Gross															45,694,000	42,891,000
Property, Plant and Equipment, Net															117,213,000	95,659,000
Amortization of capitalized computer software costs									$ 6,000,000		4,100,000		3,000,000
Unamortized computer software costs															19,600,000	14,900,000
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, Impairment Loss									$ 0
Goodwill, Gross															21,156,000	21,156,000
Goodwill, Impaired, Accumulated Impairment Loss															(8,470,000)	(8,470,000)
Goodwill															12,686,000	12,686,000
Health Insurance Costs [Abstract]
Number of days cash in advance of beginning of reporting quarter United establishes cash funding rates									90 days
Prepaid health insurance															9,000,000	9,000,000
Required deposit for health care costs															6,000,000
Amount which Plan Costs were less than the net premiums paid and owed															(6,300,000)
Portion of insurance costs that is less than the agreed upon surplus included in accrued health insurance costs a cnt liab															(15,300,000)
Premiums owed to United															(15,200,000)
Benefits Costs Incurred Related to Run-off															(1,300,000)	1,200,000	$ 5,100,000
Workers' Compensation Costs [Abstract]
Company's maximum economic burden for the first layer of claims per occurrence																			$ 1,000,000
Company's maximum aggregate economic burden for claims in excess of $1 million per policy year																		$ 6,000,000
Reduction in accrued workers' compensation costs for changes in estimated losses									$ 18,800,000		$ 16,300,000		10,900,000
U.S. Treasury rates that correspond with the weighted average estimated claim payout period (in hundredths)									2.60%		1.60%
Incurred but not paid workers' compensation liabilities
Beginning balance				207,630,000				183,928,000	$ 207,630,000		$ 183,928,000
Accrued claims									72,066,000		68,194,000
Present value discount									(7,829,000)		(4,308,000)
Paid claims									(42,228,000)		(40,184,000)
Ending balance	229,639,000				207,630,000				229,639,000		207,630,000		183,928,000
Current portion of accrued claims															42,227,000	41,137,000
Long-term portion of accrued claims															187,412,000	166,493,000
Ending Balance	$ 229,639,000			$ 207,630,000	$ 207,630,000			$ 183,928,000	207,630,000		183,928,000		$ 183,928,000		229,639,000	207,630,000	$ 183,928,000
Current portion of workers' compensation administrative fees accrued															3,600,000	1,800,000
Undiscounted accrued workers' compensation costs									$ 247,400,000		$ 219,900,000
Time period incurred claims expected to be paid recorded as restricted cash									1 year
Time period incurred claims expected to be paid, included in deposits, a long-term asset									Greater than 1 year
Return Of Excess Claim Funds									$ 19,400,000
Restricted Cash and Cash Equivalents, Current															42,227,000	41,137,000
Deposits - workers' compensation															$ 166,474,000	$ 154,215,000
Time period estimate of incurred claim costs to be paid included in short term liabilities									1 year
Time period incurred claims expected to be paid, included in long-term liabilities									Greater than 1 year
Stock-Based Compensation [Abstract]
Number of stock-based employee compensation plans															1
Vesting period for Initial grants to new members of the Board of Directors									0 years		3 years
Vesting period for officers and other management to be eligible for restricted stock grants, minimum									3 years
Percentage of annual grants issued to directors that are vested (in hundredths)									100.00%
Corporate Employees [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Percentage the entity matches of eligible corporate employees' contributions									100.00%		100.00%
Percentage of eligible compensation matched, Minimum									0.00%		0.00%		0.00%
Percentage of eligible compensation matched, maximum									6.00%		6.00%		6.00%
Matching contributions to the plan									$ 10,300,000		$ 8,700,000		$ 8,000,000
Worksite Employees [Member]
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]
Percentage of eligible compensation matched, Minimum									0.00%
Percentage of eligible compensation matched, maximum									6.00%
Matching contributions to the plan									$ 165,500,000		129,000,000		108,300,000
Buildings and Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives of property and equipment									5 years
Buildings and Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives of property and equipment									30 years
Computer Hardware and Software and Acquired Technologies [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives of property and equipment									2 years
Computer Hardware and Software and Acquired Technologies [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives of property and equipment									5 years
Software Development Costs [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives of property and equipment									3 years
Software Development Costs [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives of property and equipment									5 years
Furniture, Fixtures and Other [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives of property and equipment									5 years
Furniture, Fixtures and Other [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives of property and equipment									7 years
Northeast [Member]
Disaggregation of Revenue [Line Items]
Revenues(1)									$ 996,541,000		854,629,000		750,748,000
Southeast [Member]
Disaggregation of Revenue [Line Items]
Revenues(1)									447,584,000		379,874,000		318,185,000
Central [Member]
Disaggregation of Revenue [Line Items]
Revenues(1)									637,779,000		543,486,000		467,297,000
Southwest [Member]
Disaggregation of Revenue [Line Items]
Revenues(1)									895,243,000		767,207,000		689,334,000
West [Member]
Disaggregation of Revenue [Line Items]
Revenues(1)									797,942,000		702,619,000		664,308,000
Other Revenues [Member]
Disaggregation of Revenue [Line Items]
Revenues(1)									$ 53,460,000		$ 52,408,000		$ 51,475,000

[1] (1) Revenues are comprised of gross billings less worksite employee (“WSEE”) payroll costs as follows: Year ended December 31,(in thousands)201820172016 Gross billings$23,830,731$20,173,812$17,932,857Less: WSEE payroll cost20,002,18216,873,58914,991,510Revenues$3,828,549$3,300,223$2,941,347

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Cash, Cash Equivalents and Marektable Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Cash and Cash Equivalents [Line Items]
Money Market Funds, Overnight Holdings, at Carrying Value	$ 311,158	$ 338,112
Short-term Investments	77,492	24,594
Cash	33,207	26,700
Drafts Payable	(34,303)	(33,186)
Cash, Cash Equivalents, and Short-term Investments	387,554	356,220
Withholding associated with federal and state income taxes, employment taxes and other payroll deductions included in cash balance	224,500	271,500
Client Prepayments Included in Cash Balance	34,177	23,603
Money Market Funds [Member]
Cash and Cash Equivalents [Line Items]
Money Market Funds, Overnight Holdings, at Carrying Value	0	0
Short-term Investments	60,781	1,960
Cash	0	0
Drafts Payable	0	0
Cash, Cash Equivalents, and Short-term Investments	60,781	1,960
Cash and Cash Equivalents [Member]
Cash and Cash Equivalents [Line Items]
Money Market Funds, Overnight Holdings, at Carrying Value	311,158	338,112
Short-term Investments	16,711	22,634
Cash	33,207	26,700
Drafts Payable	(34,303)	(33,186)
Cash, Cash Equivalents, and Short-term Investments	$ 326,773	$ 354,260

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Fair Value Measurements Fair Value Measurements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Assets, Fair Value Disclosure [Abstract]
Money Market Funds	$ 327,869	$ 360,746
US Government Securities, at Carrying Value	50,147	0
Municipal bonds	10,634	1,960
Total	388,650	362,706
Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract]
Less than one year	60,781
Debt Securities, Available-for-sale, Amortized Cost, Fiscal Year Maturity [Abstract]
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost	60,791
US Treasury Securities [Member]
Debt Securities, Available-for-sale [Abstract]
Available-for-sale Securities, Amortized Cost Basis	50,150	0
Available-for-sale Securities, Gross Unrealized Gain	0	0
Available-for-sale Securities, Gross Unrealized Loss	(3)	0
Fair Value	50,147
Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract]
Fair Value	50,147
Municipal Bond [Member]
Debt Securities, Available-for-sale [Abstract]
Available-for-sale Securities, Amortized Cost Basis	10,641	1,965
Available-for-sale Securities, Gross Unrealized Gain	0	0
Available-for-sale Securities, Gross Unrealized Loss	(7)	(5)
Fair Value	10,634	1,960
Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract]
Fair Value	10,634	1,960
Level 1 [Member]
Assets, Fair Value Disclosure [Abstract]
Money Market Funds	327,869	360,746
US Government Securities, at Carrying Value	0	0
Municipal bonds	0	0
Total	327,869	360,746
Level 2 [Member]
Assets, Fair Value Disclosure [Abstract]
Money Market Funds	0	0
US Government Securities, at Carrying Value	50,147	0
Municipal bonds	10,634	1,960
Total	$ 60,781	$ 1,960

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Accounts Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Accounts Receivable Additional Disclosures [Abstract]
Accounts Receivable, Net, Current	$ 10,015	$ 12,292
Unbilled accounts receivable	385,567	318,431
Other Receivables	5,041	3,258
Accounts receivable, net	400,623	333,981
Allowance for Doubtful Accounts Receivable, Current	$ 1,000	600
Accounts receivable, due date prior to applicable payroll date	1 day
Unbilled accounts receivable [Abstract]
Accrued worksite employee payroll cost	$ 329,979	267,402
Unbilled revenues	89,765	74,632
Client Prepayments Included in Cash Balance	34,177	23,603
Unbilled accounts receivable	$ 385,567	$ 318,431

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Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deposits [Abstract]
Deposits – health insurance	$ 6,200	$ 5,300
Deposits – workers’ compensation	166,474	154,215
Deposits Assets, Noncurrent	172,674	159,515
Prepaid health insurance	$ 9,000	$ 9,000

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Long-term Debt (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2014 USD ($)	Feb. 06, 2018 USD ($)
Line of Credit Facility [Line Items]
Line of credit facility	$ 200,000			$ 350,000
Maximum borrowing capacity	$ 400,000
Percentage of subsidiary stock securing debt (in hundredths)	0.65
Unused commitment fee on the average daily unused portion (in hundredths)	0.25%
Average interest rate for the year	3.50%
Letters of Credit Outstanding, Amount	$ 1,000
Long-term debt	$ 144,400	$ 104,400
Special dividend		$ 41,700	$ 50,700
Alternate base rates, applicable margins [Abstract]
Applicable margin, federal funds rate (in hundredths)	0.50%
Applicable margin, 30-day LIBOR (in hundredths)	2.00%
LIBOR Borrowings [Member]
Line of Credit Facility [Line Items]
Description of basis for variable rate	LIBOR
Applicable margin on variable rate on borrowings, minimum (in hundredths)	1.50%
Applicable margin on variable rate on borrowings, maximum (in hundredths)	2.25%
Alternate Base Rate Borrowings [Member]
Line of Credit Facility [Line Items]
Description of basis for variable rate	alternate base rate
Applicable margin on variable rate on borrowings, minimum (in hundredths)	0.00%
Applicable margin on variable rate on borrowings, maximum (in hundredths)	0.50%

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Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Enactment of US Tax Reform		$ 2,500,000
Deferred tax liabilities
Prepaid assets	$ (3,306,000)	(3,957,000)
Depreciation	(3,918,000)	(2,021,000)
Intangibles	(474,000)	0
Software development costs	(4,950,000)	(3,732,000)
Total deferred tax liabilities	(12,648,000)	(9,710,000)
Deferred tax assets
Accrued incentive compensation	8,612,000	3,510,000
Net operating loss carryforward	709,000	774,000
Workers’ compensation accruals	4,739,000	4,586,000
Accrued rent	918,000	676,000
Stock-based compensation	6,183,000	4,233,000
Minority investment impairment	676,000	667,000
Other	305,000	216,000
Total deferred tax assets	22,142,000	14,662,000
Valuation allowance	(678,000)	(669,000)
Total net deferred tax assets	21,464,000	13,993,000
Net deferred tax assets	8,816,000	4,283,000
Current income tax expense
Federal	40,347,000	30,009,000	$ 31,045,000
State	11,133,000	5,988,000	5,190,000
Total current income tax expense	51,480,000	35,997,000	36,235,000
Deferred income tax (benefit) expense
Federal	(3,398,000)	9,549,000	2,641,000
State	(1,135,000)	193,000	310,000
Total deferred income tax (benefit) expense	(4,533,000)	9,742,000	2,951,000
Total income tax expense	46,947,000	45,739,000	39,186,000
Income tax benefit recognized related to Equity Compensation after adoption of ASU 2016-09, Quantification	$ 2,700,000	$ 6,800,000	$ 1,500,000
Reconciliation of income tax expense [Abstract]
Assumed income tax rate (in hundredths)	21.00%	35.00%	35.00%
Expected income tax expense at 21%, 35% and 35%, respectively	$ 38,296,000	$ 45,549,000	$ 36,812,000
State income taxes, net of federal benefit	7,660,000	4,085,000	3,684,000
Nondeductible expenses	4,831,000	2,649,000	1,669,000
Section 199 benefits	0	(875,000)	(686,000)
Equity compensation	(2,737,000)	(6,218,000)	(1,338,000)
Research and development credit	(856,000)	(634,000)	(751,000)
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Amount	0	(669,000)	0
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	0	2,559,000	0
Other, net	(247,000)	(707,000)	(204,000)
Total income tax expense	46,947,000	45,739,000	39,186,000
Business Acquisition [Line Items]
Liability for Uncertain Tax Positions, Current	0	$ 0	$ 0
ExpensAble [Member]
Business Acquisition [Line Items]
Operating Loss Carryforwards	$ 2,800,000
Minimum [Member] | ExpensAble [Member]
Business Acquisition [Line Items]
Net operating loss carryforwards, expiration date	Jan. 01, 2023
Maximum [Member] | ExpensAble [Member]
Business Acquisition [Line Items]
Net operating loss carryforwards, expiration date	Jan. 01, 2030

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Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended									12 Months Ended
	Jan. 07, 2016	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017		Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2014
Stockholders' Equity Note [Abstract]
Repurchase of treasury stock (in shares)											1,066,409	594,974
Shares withheld for tax withholding obligations for the vesting of restricted stock awards (in shares)											132,021	305,828
Remaining number of shares authorized to be repurchased (in shares)		1,611,155									1,611,155
MaxAmountOfTenderOfferForRepurchaseOfShares	$ 125,000
Share Price	$ 23.75
Stock Repurchased and Retired During Period, Shares	6,027,062
Repurchase of common stock	$ 143,100												$ 144,263
Transaction Costs Related to Tender Offer	$ 1,100
Borrowings under long-term debt agreement													104,400
Payments of Dividends [Abstract]
Dividends declared per share of common stock (in dollars per share)		$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 1.150	[1]	$ 0.150	$ 0.150	$ 0.125
Dividends paid											$ 33,408	$ 65,768	$ 20,599
Class of Stock [Line Items]
Special dividend, per share						$ 1.00
Special dividend												$ 41,700		$ 50,700
Preferred stock, authorized (in shares)		20,000,000				20,000,000					20,000,000	20,000,000
Preferred Stock, Value, Issued		$ 0				$ 0					$ 0	$ 0

[1] (1) Includes a $1.00 per share special dividend.

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Incentive Plans (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation [Abstract]
Number of common shares available for grant under the incentive plan (in shares)	2,680,666
Share-based compensation	$ 20,425	$ 24,345	$ 16,643
Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost		2,300
Tax benefits (expense) associated with stock-based compensation	$ 5,300	$ 8,500	$ 6,200
Stock option activity [Roll Forward]
Outstanding, beginning balance (in shares)	16,000
Granted (in shares)	0
Exercised (in shares)	0
Canceled (in shares)	0
Outstanding, ending balance (in shares)	16,000	16,000
Exercisable, ending balance (in shares)	16,000
Weighted average exercise price [Abstract]
Outstanding, beginning balance (in dollars per share)	$ 15.30
Granted (in dollars per share)	0.00
Exercised (in dollars per share)	0.00
Canceled (in dollars per share)	0.00
Outstanding, ending balance (in dollars per share)	15.30	$ 15.30
Exercisable, ending balance (in dollars per share)	$ 15.30
Weighted average remaining contractual life, stock option awards outstanding at end of year (in years)	2 years 6 months
Weighted average remaining contractual life, stock option awards exercisable at end of year (in years)	2 years 6 months
Aggregate intrinsic value of options outstanding, ending balance	$ 1,220
Aggregate intrinsic value of options exercisable ending balance	$ 1,220
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards vesting period	3 years
Employee Stock Purchase Plan (ESPP) [Abstract]
ESPP Stock Issued During Period (in shares)	30,000	38,000	34,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of shares vested during the year	$ 1,200	$ 46,000	$ 16,200
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options	$ 18,400
Unrecognized compensation expense, period for recognition (in months)	22 months
Equity Instruments Other than Options, Nonvested, Number of Shares[Roll Forward]
Balance at 12/31/2017 (in shares)	343,000
Granted (in shares)	290,000
Canceled (in shares)	(37,000)
Balance at 12/31/2018 (in shares)	582,000	343,000
Vested (in shares)	14,000
Weighted Average Grant Date Fair Value, Equity Instruments Other than Options [Abstract]
Balance at 12/31/2016 (in dollars per share)	$ 35.29
Granted (in dollars per share)	65.98	$ 42.15	$ 26.33
Vested (in dollars per share)	66.28
Canceled (in dollars per share)	41.37
Balance at 12/31/2017 (in dollars per share)	$ 49.48	$ 35.29
Restricted Stock [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards vesting period	3 years
Restricted Stock [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards vesting period	5 years
Long-Term Incentive Program Awards [Member]
Equity Instruments Other than Options, Nonvested, Number of Shares[Roll Forward]
Balance at 12/31/2017 (in shares)	570,000
Granted (in shares)	100,000
Canceled (in shares)	(48,000)
Balance at 12/31/2018 (in shares)	426,000	570,000
Vested (in shares)	196,000
Weighted Average Grant Date Fair Value, Equity Instruments Other than Options [Abstract]
Balance at 12/31/2016 (in dollars per share)	$ 32.90
Granted (in dollars per share)	81.51
Vested (in dollars per share)	26.40
Canceled (in dollars per share)	41.90
Balance at 12/31/2017 (in dollars per share)	$ 46.35	$ 32.90
Long-Term Incentive Program Awards [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock awards vesting period	3 years
2015LTIPAward [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Issued in Period (in shares)	371,000
Fair value of shares vested during the year	$ 24,200
2016LTIPAwards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options	$ 400
Equity Instruments Other than Options, Nonvested, Number of Shares[Roll Forward]
NumberofShareExpectedtoVestBasedOnCurrentEstimatesofPerformanceAchievment	345,000
2017LTIPAwards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options	$ 3,400
Equity Instruments Other than Options, Nonvested, Number of Shares[Roll Forward]
NumberofShareExpectedtoVestBasedOnCurrentEstimatesofPerformanceAchievment	202,000
2018LTIPAwards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options	$ 8,600
Equity Instruments Other than Options, Nonvested, Number of Shares[Roll Forward]
NumberofShareExpectedtoVestBasedOnCurrentEstimatesofPerformanceAchievment	176,000

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Net Income Per Share (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Net income	$ 24,655	$ 36,207	$ 24,560	$ 49,991	$ 15,554	$ 19,202	$ 14,018	$ 35,628	$ 135,413	$ 84,402	$ 65,991
Less distributed and undistributed earnings allocated to participating securities									1,875	1,517	1,496
Net income allocated to common shares									$ 133,538	$ 82,885	$ 64,495
Weighted average common shares outstanding									41,217	41,067	41,668
Incremental shares from assumed conversions of common stock options and LTIP awards									289	204	94
Adjusted weighted average common shares outstanding									41,506	41,271	41,762
Potentially dilutive securities not included in weighted average share calculation due to anti-dilutive effect									0	0	0

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Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Leases [Abstract]
Rental expense	$ 15,400	$ 15,400	$ 15,000
Operating leases minimum payments due [Abstract]
2019	16,542
2020	16,325
2021	13,932
2022	12,791
2023	10,623
Thereafter	23,638
Total minimum lease payments	$ 93,851

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Commitments and Contingencies (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Disclosure threshold for future non-cancelable purchase and service obligations	greater than $100,000 and one year
Non-cancelable purchase and service obligations [Abstract]
2019	$ 16,535
2020	16,782
2021	12,494
2022	6,525
2023	1,954
Thereafter	700
Total obligations	$ 54,990

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Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017		Sep. 30, 2017		Jun. 30, 2017		Mar. 31, 2017		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Revenues(1)	$ 966,756	$ 925,126	$ 922,295	$ 1,014,372	$ 826,494		$ 795,513		$ 795,552		$ 882,664		$ 3,828,549	[1]	$ 3,300,223	[1]	$ 2,941,347	[1]
Gross profit	161,591	166,054	154,544	199,720	142,866		139,966		130,553		159,346		681,909		572,731		491,610
Operating income	32,619	48,133	33,581	64,703	23,712		29,799		22,938		53,492		179,036		129,941		106,306
Net income	$ 24,655	$ 36,207	$ 24,560	$ 49,991	$ 15,554		$ 19,202		$ 14,018		$ 35,628		$ 135,413		$ 84,402		$ 65,991
Basic net income per share of common stock (in dollars per share)	$ 0.59	$ 0.86	$ 0.59	$ 1.20	$ 0.36	[2]	$ 0.46	[2]	$ 0.34	[2]	$ 0.85	[2]	$ 3.24		$ 2.02		$ 1.55
Diluted net income per share (in dollars per share)	$ 0.59	$ 0.86	$ 0.58	$ 1.18	$ 0.36	[2]	$ 0.46	[2]	$ 0.33	[2]	$ 0.85	[2]	$ 3.22		$ 2.01		$ 1.54

[1] (1) Revenues are comprised of gross billings less worksite employee (“WSEE”) payroll costs as follows: Year ended December 31,(in thousands)201820172016 Gross billings$23,830,731$20,173,812$17,932,857Less: WSEE payroll cost20,002,18216,873,58914,991,510Revenues$3,828,549$3,300,223$2,941,347

[2] (1) Adjusted to reflect the two-for-one split of our common stock effected on December 18, 2017 as a stock dividend.