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December 22 , 2021 PAYCHEX® ™ Paychex , Inc. Reports Second Quarter Results : Revenue Advances 13 % and Diluted Earnings Per Share Grows 21 % ; Company Raises Business Outlook for the Year ROCHESTER , N.Y .-- ( BUSINESS WIRE ) -- Paychex , Inc. ( the " Company , " " Paychex , " " we , " " our , " or " us " ) today announced the following results for the quarter ended November 30 , 2021 ( the " second quarter " ) , as compared to the corresponding prior year period : In millions , except per share amounts Total service revenue Total revenue Operating income Diluted earnings per share Adjusted diluted earnings per share ( 1 ) For the three months ended November 30 , 2021 2020 Change ( 2 ) $ 1,094.4 $ 968.9 13 % $ 1,108.5 $ 983.7 13 % $ 440.3 $ 354.3 24 % $ 0.91 $ 0.75 21 % For the six months ended November 30 , 2021 2020 Change ( 2 ) $ 2,162.8 $ 1,886.2 15 % $ 2,191.4 $ 1,915.9 14 % $ 883.2 $ 638.3 38 % $ 1.83 $ 1.34 37 % $ 0.91 $ 0.73 25 % $ 1.80 $ 1.36 ( 1 ) Adjusted diluted earnings per share is not a United States ( " U.S. " ) generally accepted accounting principle ( " GAAP " ) measure . Adjusted diluted earnings per share in all periods included an adjustment for net tax windfall benefits related to employee stock - based compensation payments . In the prior year periods , adjusted diluted earnings per share included an adjustment for one - time non - recurring cost saving initiatives . Please refer to the " Non - GAAP Financial Measures " section on page 3 of this press release for a discussion of non - GAAP measures and a reconciliation to the U.S. GAAP measure of diluted earnings per share . ( 2 ) Percentage changes are calculated based on unrounded numbers . Martin Mucci , Chairman and Chief Executive Officer , commented , " We posted strong financial results for the second quarter of fiscal 2022 , with growth of 13 % in total revenue and 21 % in diluted earnings per share . Results were driven by growth in employees within our client base and continued strong sales growth and client retention . 32 % The environment is more complicated than ever for small and medium - sized businesses . Trends that emerged during the pandemic continue unabated , particularly the demand for