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 16, 2010 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,
2010.
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| Form |
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Registration Statement No. |
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Description |
S-8
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No. 333-65191
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1998 Stock Incentive Plan |
S-8
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No. 333-84055
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401(k) Incentive Retirement Plan |
S-8
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No. 333-129571
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Non-Qualified Stock Option Agreement |
S-8
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No. 333-129572
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2002 Stock Incentive Plan, as amended and restated |
/s/ Ernst & Young LLP
Cleveland, Ohio
July 16, 2010