HOUSTON, Jan. 16 /PRNewswire-FirstCall/ -- Administaff, Inc. (NYSE: ASF), a leading provider of human resources services for small and medium-sized businesses, will release its fourth quarter and full year 2006 earnings prior to the open of the New York Stock Exchange on Monday, Feb. 12, 2007. A teleconference hosted by Administaff's management will be held at 10 a.m. ET to discuss the results and business trends. Investors, analysts, media and other interested persons may access the call at 888-396-2369, passcode 45862796. The call will also be webcast live at http://www.administaff.com . To access the webcast, click on the Investor Relations section of the Web site and select "Live Webcast." A replay of the conference call will be available at 888-286-8010, passcode 24647414, for two weeks after the call. The webcast will be archived for one year. The conference call script will be posted to the Investor Relations section of the Web site after the call concludes.

Administaff is the nation's leading professional employer organization (PEO), serving as a full-service human resources department that provides small and medium-sized businesses with administrative relief, big-company benefits, reduced liabilities and a systematic way to improve productivity. The company operates 41 sales offices in 22 major markets. For additional information, visit Administaff's Web site at http://www.administaff.com .

CONTACT: investor relations, Douglas S. Sharp, Vice President, Finance, Chief Financial Officer and Treasurer, +1-281-348-3232, or Douglas_Sharp@Administaff.com , or media, Susan Emfinger, Director, Corporate Communications, +1-281-348-3105, or Susan_Emfinger@Administaff.com , both of Administaff, Inc.