Automatic Data Processing, Inc.

ES client retention reached 92.1% in FY2025, within 10 basis points of the all-time record, and has been above 90% for at least five consecutive fiscal years including through the COVID employment shock. New business bookings of approximately $2.5B annually sustain the client base, and recurring payroll processing fees account for the substantial majority of service revenues.

ADP operates two segments, Employer Services and PEO Services, both serving the payroll and HCM market for the same labor-market end customer. No material revenue stream outside HR and payroll exists, making performance closely correlated to US employment levels and HR compliance spending.

Approximately 88% of FY2025 revenues were generated within the United States, with the United Kingdom contributing roughly 5% and other international operations the remainder. This home-market dependence means a sustained downturn in US employment conditions or adverse domestic regulatory change directly pressures the consolidated revenue base with limited geographic offset.

The Employer Services segment demonstrated 100 basis points of margin expansion in FY2025, reflecting the operating leverage of adding clients to a fixed compliance and technology platform. The PEO segment's co-employment model, which passes through employer costs, limits system-wide margin leverage but accounts for a minority of total operating profit.

Payroll processing is mission-critical, legally mandated, and executed on recurring contractual terms with annual renewal, placing it among the most defensive revenue categories in enterprise software. The client funds float (average balance approximately $34.9B in Q1 FY2026) adds higher-margin interest income, though this component is sensitive to interest rate levels rather than underlying service quality.