EX-23.1 9 l42678exv23w1.htm EX-23.1
EXHIBIT 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in the following Registration Statements of Paychex, Inc. of our reports dated July 15, 2011 with respect to the consolidated financial statements and schedule of Paychex, Inc. and the effectiveness of internal control over financial reporting of Paychex, Inc., included in this Annual Report (Form 10-K) for the year ended May 31, 2011.

Form |  | Registration Statement No. |  | Description
S-8 |  | No. 333-65191 |  | 1998 Stock Incentive Plan
S-8 |  | No. 333-84055 |  | 401(k) Incentive Retirement Plan
S-8 |  | No. 333-129571 |  | Non-Qualified Stock Option Agreement
S-8 |  | No. 333-170871 |  | 2002 Stock Incentive Plan, as amended and restated
|  |  |  | effective October 13, 2010
|  |  |  | /s/ Ernst & Young LLP

Chicago, Illinois
July 15, 2011