Description of business: Paychex, Inc. and its wholly owned subsidiaries (collectively, the “Company” or “Paychex”) is a leading provider of integrated human capital management (“HCM”) solutions for human resources (“HR”), payroll, benefits, and insurance for small- to medium-sized businesses in the United States (“U.S.”) and parts of Europe. The Company also has operations in India. Paychex, a Delaware corporation formed in 1979, reports as one segment.

Revision to previously issued financial statements: The consolidated statement of cash flows for the three months ended August 31, 2023 includes a revision to previously reported amounts related to the presentation of the cash flows associated with short-term receivables purchased from the Company’s clients under non-recourse arrangements. The revision increased net cash provided by operating activities and decreased net cash provided by investing activities by $37.2 million. Management concluded that this revision was not material to the financial statements of any previously filed annual or interim periods. This revision is reflected in this Form 10-Q and will be reflected in future filings.

Accounts receivable, net of allowance for credit losses: Accounts receivable balances are shown on the Consolidated Balance Sheets net of the allowance for credit losses of $25.0 million and $21.3 million as of August 31, 2024 and May 31, 2024, respectively. These balances include trade receivables for services provided to clients and receivables purchased from the Company's clients under non-recourse arrangements. Trade receivables were $162.5 million and $141.3 million as of August 31, 2024 and May 31, 2024, respectively. Purchased receivables, at gross, were $988.7 million and $939.6 million as of August 31, 2024 and May 31, 2024, respectively.

The Company is exposed to credit losses through the sale of services, payment of client obligations, and collection of purchased receivables. To mitigate this credit risk, the Company has multiple programs in place to assess and continuously monitor each client’s ability to pay for these solutions and support. Credit monitoring programs include, but are not limited to, new client credit reviews, establishing appropriate credit limits, monitoring of credit distressed clients, and early electronic wire and collection procedures. The Company also considers contract terms and conditions, client business type or strategy and may require collateralized asset support or prepayment to mitigate credit risk.

Accounts receivable are written off and charged against the allowance for credit losses when the Company has exhausted all collection efforts without success. The Company estimates its credit losses based on historical loss activity adjusted for current economic conditions and reasonable and supportable forecast factors, when applicable. The provision for the allowance for credit losses and accounts written off were not material for the three months ended August 31, 2024 and August 31, 2023. No single client had a material impact on total accounts receivable as of August 31, 2024 and May 31, 2024 or service revenue and results of operations for the three months ended August 31, 2024 and August 31, 2023.

PEO insurance reserves: As part of its PEO solution, the Company offers workers’ compensation insurance and health insurance coverage to clients for the benefit of client employees. Workers’ compensation insurance is primarily provided under fully insured high deductible workers’ compensation insurance policies. Workers’ compensation insurance reserves are established to provide for the estimated costs of paying claims up to per occurrence liability limits. These reserves include estimates of certain expenses associated with processing and settling claims. For fiscal 2025 and 2024, the Company has an aggregate maximum liability of $1.0 million for claims exceeding $1.0 million, and once met, the maximum individual claims liability is $1.0 million.

With respect to PEO health insurance coverage, the Company offers various health insurance plans that take the form of either fully insured guaranteed cost plans or fully insured insurance arrangements where the Company retains risk. A reserve for insurance arrangements where the Company retains risk is established to provide for the payment of claims in accordance with the Company’s service contract with the carrier. The claims reserve includes estimates for reported losses, plus amounts for those claims incurred but not reported, and estimates of certain expenses associated with processing and settling the claims. The Company’s maximum individual claims liability is $0.5 million under its policies covering both fiscal 2025 and fiscal 2024.

In establishing the PEO workers' compensation insurance reserves, the Company uses an independent actuarial estimate of undiscounted future cash payments that would be made to settle claims. Estimating the ultimate cost of future claims is an uncertain and complex process based upon historical loss experience and accepted actuarial methods and assumptions. These reserves are subject to change due to multiple factors, including economic trends, changes in legal liability law, and damage awards, all of which could materially impact the reserves as reported in the consolidated financial statements. Accordingly, final claim settlements may vary from the present estimates, particularly with workers’ compensation insurance where those payments may not occur until well into the future. The Company regularly reviews the adequacy of its estimated insurance reserves. Adjustments to previously established reserves are reflected in the results of operations for the period in which the adjustment is identified. Such adjustments could be significant, reflecting any combination of new and adverse or favorable trends.

Recently adopted accounting pronouncements: There were no recently adopted accounting pronouncements during the three months ended August 31, 2024 that had a material impact on the Company's consolidated financial statements or disclosures.

Recently issued accounting pronouncements: In November 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2023-07 “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures.” This ASU expands public entities’ segment disclosures by requiring disclosure of significant segment expenses that are regularly provided to the chief operating decision maker and included within each reported measure of segment profit or loss, an amount and description of its composition for other segment items, and interim disclosures of a reportable segment’s profit or loss and assets. The requirements are effective for fiscal years beginning after December 15, 2023, and for interim periods within fiscal years beginning after December 15, 2024, and are required to be applied retrospectively. This ASU is applicable to the Company’s Annual Report on Form 10-K for the fiscal year ending May 31, 2025, and subsequent interim periods, with early application permitted. The requirements of this ASU are disclosure-related and will not have an impact on the Company’s financial condition, results of operations, or cash flows. The Company is currently evaluating the impact of adopting this ASU on its reportable segment disclosures.

In December 2023, the FASB issued ASU No. 2023-09 “Income Taxes (Topic 740): Improvements to Income Tax Disclosures.” This ASU updates income tax disclosure requirements primarily by requiring specific categories and greater disaggregation within the rate reconciliation and disaggregation of income taxes paid by jurisdiction. This ASU is effective for annual periods beginning after December 15, 2024, and is applicable to the Company’s fiscal year beginning June 1, 2025, with early application permitted. The transition method is prospective with the retrospective method permitted. The requirements of this ASU are

disclosure-related and will not have an impact on the Company’s financial condition, results of operations, or cash flows. The Company is currently evaluating the impact of adopting this ASU on its income tax disclosures.