ADP Automatic Data Processing Inc

Automatic Data Processing, Inc. (Nasdaq:ADP) is scheduled to release its financial results for the first fiscal quarter ending September 30, 2011 before the opening of the NASDAQ on Wednesday, October 26, 2011.

ADP also will be hosting a conference call at 8:30 a.m. EDT on October 26, 2011 to discuss the results for the quarter. Gary C. Butler, chief executive officer, Christopher R. Reidy, chief financial officer, and Elena S. Charles, vice president of investor relations, will be participating on the call.

Investors and interested participants are invited to listen to the conference call and view the accompanying slide presentation via live webcast. The webcast can be accessed through ADP's home page, www.adp.com, or ADP's Investor Relations home page, http://www.investquest.com/InvestQuest/a/adp/. Please note, this webcast will be broadcast in two streams: Windows Media and Flash. You may switch streams by selecting "Windows Media" or "Flash" from the gear-setup symbol located to the right-hand side of the volume control on the webcast player. Please check your system 10 minutes prior to the webcast. In addition, the slide presentation will be available to download and print approximately 60 minutes before the webcast at ADP's Investor Relations home page. A replay of the webcast will be available for approximately two weeks after the event and can be accessed in the same manner as the live webcast.

Automatic Data Processing, Inc. (Nasdaq:ADP), with about $10 billion in revenues and about 570,000 clients, is one of the world's largest providers of business outsourcing solutions. Leveraging over 60 years of experience, ADP offers a wide range of human resource, payroll, tax and benefits administration solutions from a single source. ADP's easy-to-use solutions for employers provide superior value to companies of all types and sizes. ADP is also a leading provider of integrated computing solutions to auto, truck, motorcycle, marine, recreational vehicle, heavy manufacturing, and agricultural vehicle dealers throughout the world. For more information about ADP or to contact a local ADP sales office, reach us at 1.800.225.5237 or visit the company's Web site at www.ADP.com.

CONTACT: Automatic Data Processing, Inc.
         ADP Investor Relations, 973.974.5858