Company makes 500 list on its 15-year anniversary

HOUSTON, TX – April 3, 2001 – Administaff, Inc. (NYSE: ASF), the nation’s leading Professional Employer Organization (PEO), today announced it is included on the Fortune 500 list of America’s largest corporations. The company was ranked number 448, moving up from a Fortune 1000 ranking of 615 last year.

"This is a terrific milestone for Administaff and a great way to celebrate 15 years in business," said Paul J. Sarvadi, Administaff president and chief executive officer. "Our rapid growth demonstrates how increasingly valuable our services are to an expanding number of small and medium-sized businesses across the country."

Fortune also ranked the top 500 companies in various performance and industry categories. Administaff was among the top 20 companies in all three listings that benchmark the "most bang for the buck," including:

number two in revenues per dollar of assets,
number 10 in revenues per dollar of equity, and
number 16 in revenues per employee.
Only three other companies in the Fortune 500 made all three listings in the "most bang for the buck" rankings. Administaff also ranked in the top five companies in the "Diversified Outsourcing Services" industry category.

According to Fortune, the methodology used for the Fortune 500 rankings has always been the same. "The criterion for membership in this elite club remained constant: revenues, revenues, revenues," reported the magazine. "In these turbulent times, we all need a little constancy."

The Fortune 500 list will be published in the April 16, 2001, issue. For additional information about the Fortune 500, log on to www.fortune.com.

With 2000 revenues of $3.7 billion, Administaff is a leading personnel management company that serves as a full-service human resources department for small and medium-sized businesses throughout the United States. In addition to the Fortune 500 list, the company is included on Fortune’s list of "America’s Most Admired Companies," the Forbes Platinum 400 list of the best big companies in America and the InformationWeek 500 list of leading information technology innovators.

Administaff’s Personnel Management System includes employment administration, benefits management, government compliance, recruiting and selection, employer liability management, training and development, performance management and owner support. These core services are complemented by an eBusiness strategy that includes Administaff Assistant®, an eService platform that provides clients and worksite employees with information and resources to help maximize the benefit of their Administaff services; and bizzportSM, an eCommerce portal that features value-added products and services from best-of-class providers such as American Express, Aon Enterprise, AT&T, Bank One, Best Upon Request, Continental Airlines, CorporateGifts.com, Dell, Forrester Research, FTD.COM, IBM, Lexmark, MovingStation, Spiegel, Virtual Growth and Works.com.

Administaff has 33 sales offices in 17 major markets. For additional information, visit the company’s Web site at www.administaff.com.

(Note: The statements contained in this press release that are not historical facts are forward-looking statements that involve a number of risks and uncertainties. Therefore, the actual results of future events described in such forward-looking statements could differ materially from those stated in such forward-looking statements. Among the factors that could cause actual results to differ materially are: (i) changes in general economic conditions; (ii) regulatory and tax developments; (iii) changes in Administaff’s direct costs and operating expenses; (iv) the estimated costs and effectiveness of capital projects and investments in technology and infrastructure; (v) Administaff’s ability to effectively implement its eBusiness strategy; (vi) the effectiveness of Administaff’s sales and marketing efforts, including the company’s marketing arrangements with other companies; and (vii) changes in the competitive environments in the PEO industry. These factors are described in further detail in Administaff’s filings with the Securities and Exchange Commission.)