ADMINISTAFF MAKES FORBES' TOP 400 LIST OF BEST-PERFORMING COMPANIES

HOUSTON, TX –January 11, 1999 – Administaff, Inc. (NYSE: ASF), a leading Professional Employer Organization (PEO), has been named to the Forbes Platinum 400, a list of the best-performing big companies in the U.S. The list is published in the magazine’s Jan. 11, 1999, issue.

In compiling its Platinum 400 List, Forbes based its evaluations on growth and profitability. The magazine began by identifying 1,200 publicly traded companies with sales over $750 million, then divided those companies into 25 industry groups. The final selection criteria included sales growth, net income growth and return on capital over both the past five years and latest 12 months.

Administaff was the nation’s only PEO named to the Platinum 400 List and was included in the Business Services category.

"We are very pleased that Forbes has recognized the success of Administaff’s business model, and we’re honored to be included on this prestigious list," said Paul J. Sarvadi, Administaff president and chief executive officer.

For additional information about the Forbes Platinum 400 List, log in to the Forbes web site at www.forbes.com.

Administaff provides small- to medium-sized businesses with a comprehensive Personnel Management System that includes benefits and payroll administration, medical and workers’ compensation insurance programs, personnel records management, employer liability management, employee recruiting and selection, performance management, and training and development services. The company currently has 22 offices in 14 major markets and serves clients and worksite employees throughout the United States. 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) regulatory and tax developments; (ii) changes in the company’s direct costs and operating expenses; (iii) the effectiveness of the company’s sales and marketing efforts, including its marketing agreement with American Express, American Express’ ability to set qualified appointments and the company’s ability to convert those appointments into sales; (iv) the estimated costs and effectiveness of capital projects and investments in technology and infrastructure; (v) changes in the competitive environment in the PEO industry; and (vi) the effectiveness and estimated costs of the company’s Year 2000 conversion and contingency plans. These factors are described in further detail in the company’s filings with the Securities and Exchange Commission.)