Tuesday, May 1, 2007

HOUSTON--(BUSINESS WIRE)--April 10, 2007--Administaff, Inc. (NYSE:ASF), a leading provider of human resources services for small and medium-sized businesses, will release its first quarter earnings prior to the open of the New York Stock Exchange on Tuesday, May 1, 2007. A teleconference hosted by Administaff's management will be held at 10 a.m. EDT to discuss the results and business trends. Investors, analysts, media and other interested persons may access the call at 800-573-4840, passcode 71124700. 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 22377284, for two weeks after the call. The webcast will be archived for one year. The conference call script and company guidance for the second quarter and full year 2007 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 42 sales offices in 22 major markets. For additional information, visit Administaff's Web site at http://www.administaff.com.

CONTACT: Administaff, Inc., Houston
Investor Relations Contact:
Douglas S. Sharp, 281-348-3232
Vice President, Finance
Chief Financial Officer and Treasurer
Douglas_Sharp@Administaff.com
or
News Media Contact:
Susan Emfinger, 281-348-3105
Director, Corporate Communications
Susan_Emfinger@Administaff.com

SOURCE: Administaff, Inc.