Every PEO prices through one of two models: per-employee per-month (PEPM) or percent-of-payroll. The choice between them has more economic consequence than buyers usually realize.
PEPM pricing. A flat dollar amount per employee, per month. A 50-person company at $145 PEPM pays $7,250 monthly, $87,000 annually, regardless of average compensation. Budget pretty cleanly. Most quality PEOs default to PEPM. It's our recommended structure for almost every buyer.
Percent-of-payroll. A percentage of gross payroll — typically 2–11%, with quality PEOs in the 3–5% range. A 50-person tech company with $300K average compensation and a 4% rate pays $600,000 annually. Same company on $145 PEPM pays $87,000. The percent-of-payroll math is brutal for compensation-heavy workforces.
The crossover. Percent-of-payroll typically wins on compensation under $50K–65K average. For payroll-heavy industries (warehousing, food service, retail, healthcare CNAs/aides), 3–4% can beat $130 PEPM. For knowledge work (tech, professional services, finance, agencies), PEPM is almost always cheaper.
How to negotiate the right model. If the PEO defaults to percent-of-payroll, ask for a PEPM quote. Most quality PEOs offer both — the rep just defaults to whichever pencils better for them. Get both quotes side by side, then pick.