Financial research concept

Payroll PEO Average Worksite Employees

Payroll PEO Average Worksite Employees measure the average employee population covered by ADP's professional employer organization arrangements.

By Lee BaileyPublished Sep 24, 2026
Research context

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Research date
Sep 24, 2026Use the dated article and cited sources for the definition, examples, and stated limitations.
Operating-model context
15 connected conceptsPart of the reviewed Payroll & HCM Economics; issuer definitions remain distinct where disclosed.
Company examples
1 reviewed companyRelationships reflect supported examples, not a normalized cross-company KPI ranking.
  1. Why it matters
  2. Investor caution
  3. Part of the Payroll & HCM Economics
  4. See It in Company Research
  5. Continue Research

Payroll PEO Average Worksite Employees measure the average number of client employees covered by ADP's Professional Employer Organization arrangements during the period.

ADP reported 762,000 average worksite employees in fiscal 2026, approximately 2% above fiscal 2025.

Why it matters

Worksite employee count is a core volume driver for the PEO business because service fees and benefit pass-throughs are tied to the employee population supported through co-employment arrangements.

Investor caution

Worksite employees are not ADP employees, Employer Services pays per control, or client count. The measure reflects the PEO population and can change through client wins, losses, hiring, and layoffs.

Source:

Part of the Payroll & HCM Economics

Connect recurring Employer Services economics, PEO worksite and benefits-pass-through economics, and client-funds float earnings to understand payroll and HCM business economics.

How the model fits together
  • Employer Services growth and retention: Employer Services revenue combines recurring payroll and HCM relationships with new business starts, client revenue retention, pricing, pays per control, and other drivers. New business bookings are an earlier sales measure, while organic constant-currency growth and segment margin show later revenue and profitability outcomes.
  • PEO worksite volume and pass-through economics: PEO revenue combines service economics with zero-margin benefits pass-throughs. Revenue excluding pass-throughs isolates the service revenue base, average worksite employees adds the core population driver, and segment margin shows profitability against the issuer's reported revenue denominator.
  • Client-funds balance, yield, and earnings: Average client funds balances multiplied by portfolio yield provide the core economic bridge into interest revenue, while the extended investment strategy net impact includes additional investment and financing effects. Client funds remain restricted by corresponding client obligations rather than functioning as unrestricted corporate cash.

See It in Company Research

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