Cost guideRead at source, 9 September 2026

PEO Cost: How the Two Pricing Models Work, and How to Compare Them

PEOs quote in one of two units, and the units are not comparable. The percentage-of-payroll model charges a percentage of gross wages, which rises automatically with raises and overtime. The per-employee-per-month model charges a flat amount per head, which does not. Neither number is the invoice: most of what a PEO bills you is pass-through — the wages themselves, employer payroll taxes, workers' compensation premium and benefit premiums — and the administrative fee sits inside or beside that. No public authority publishes a benchmark PEO fee, and we are not going to invent one. What this page does instead is show you how to convert two quotes into the same unit, and what to ask so the comparison means something.

What you are buying

A professional employer organization enters a co-employment relationship with your business. You keep direction and control of the work; the PEO becomes an employer of record for payroll, employment tax administration, benefits and often workers' compensation. It is not a staffing agency — the people are already yours and you found them yourself — and it is not an employer of record arrangement for a country where you have no entity, which is a different product solving a different problem. Its pricing models, published fee ranges and the point where a flat fee beats a percentage of salary are on employer of record cost.

The scale is not small. NAPEO reports 523 PEOs in the United States serving over 208,000 client businesses and roughly 4.5 million worksite employees, with an average of about 21.7 worksite employees per client — figures for 2022. The industry association also reports that PEO clients have turnover about 12 percent lower and are 50 percent less likely to go out of business than comparable non-clients; those are association figures about their own members' clients, and worth reading as such.

The two pricing models

For a frontline employer the choice is rarely neutral. A warehouse running a peak season on twelve-hour shifts pays a percentage-model PEO substantially more in November than in March for the same number of people and the same amount of administration. A senior living operator with a large part-time roster pays a PEPM-model PEO the same for a sixteen-hour-a-week aide as for a full-timer. Which distortion you prefer depends on the shape of your payroll, not on which number looks smaller.

Most of the invoice is not the fee

This is the part that makes headline percentages misleading. A PEO invoice generally carries, in some order:

• Gross wages — money you would pay anyway, passed through.
• Employer payroll taxes — the employer share of FICA, plus FUTA and state unemployment tax, which you would pay anyway, at rates that depend on your history or the PEO's, depending on the state and the arrangement.
• Workers' compensation premium — usually through the PEO's program, at their rates rather than yours.
• Benefit premiums — whatever you elect from their plans.
• The administrative fee — the only line that is actually the PEO's price for the service.

A quote of "3% of payroll" may be a fee of 3% on top of all of the above, or a bundled rate that includes taxes and workers' compensation. Those are wildly different offers wearing the same number. The single most useful question in a PEO sales conversation is: show me the administrative fee as a separate line, and tell me which of the pass-through items your percentage is calculated on.

Put two quotes in the same unit

This converts a percentage quote and a per-employee-per-month quote onto the same annual and per-head basis, using your own census. It compares administrative fees only; pass-through wages, taxes and premiums are excluded on both sides, which is the only way to compare them fairly.

Two things to do with the answer. First, re-run it at your peak-season payroll rather than your average, because that is where the percentage model diverges. Second, re-run it at next year's wages: a 4% raise across the workforce raises a percentage-model fee by 4% and a PEPM fee by nothing.

Certified PEOs, and what certification actually changes

The IRS runs a voluntary certification program created by the Tax Increase Prevention Act of 2014. A certified PEO must be a business entity with at least one physical business location in the United States, demonstrate a history of financial responsibility, organizational integrity and federal, state and local tax compliance, and be managed by people with knowledge or experience of federal and state employment tax compliance.

What that buys you is statutory rather than reputational. Under 26 U.S.C. § 3511, a certified professional employer organization shall be treated as the employer (and no other person shall be treated as the employer) of any work site employee for employment tax purposes, for wages the CPEO actually remits. In plain terms: with a CPEO, the employment tax liability for those wages sits with the CPEO. That is the single clearest difference between a certified and an uncertified provider, and it is checkable — the IRS publishes the list of certified organizations. Ask any PEO whether they are on it, and verify rather than accept the answer.

PEO, EOR, staffing agency, RPO

Four things that get confused, distinguished by what they actually take off your hands.

• PEO — co-employs people you recruited and manage, and administers payroll, taxes and benefits. You still find and direct the people.
• Employer of record — becomes the sole legal employer, usually so you can employ someone in a jurisdiction where you have no entity. Priced per employee per month, and a different instrument entirely.
• Staffing agency — supplies workers on its own payroll at a marked-up hourly rate; we publish what that markup looks like in staffing agency markup.
• RPO — runs recruiting as a service, without employing anyone; see RPO cost.

The one thing none of them does is create applicants. A PEO administers the people you have; an RPO runs the process; a staffing agency rents you somebody else's. Attracting candidates in the first place is a separate line, and across the 891 Boostpoint-managed Meta campaigns in our 2026 Social Job Advertising Benchmark the median campaign cost $13.88 per applicant, with a volume-weighted average of $8.02. Worth knowing before a PEO conversation turns into a recruiting one.

PEO fee: the lines that decide how much a PEO actually costs

The administrative fee is the PEO's price, but it is rarely the only line that is really theirs. Before comparing two quotes, get a written answer to each of these, because each one can move the annual cost more than a small difference in the headline rate.

• The base: percentage or per employee per month. And, for a percentage quote, which pass-through items it is calculated on. The two models are compared above.
• Setup or onboarding charges. Whether there is a one-time charge to move payroll, benefits and records across.
• Who counts as an employee. Whether part-time, seasonal and terminated-in-month employees are billed a full month on a per-employee model. For a frontline roster this is often the biggest single variable.
• Workers' compensation. Whether it is priced on the PEO's program or your own experience, and whether the rate is fixed for the contract year.
• State unemployment tax. Which account and rate the quote assumed, as set out above.
• Benefit administration. Whether plan administration is inside the fee or billed per enrolled employee on top of premiums.
• Exit terms. Notice period, any early-termination charge, and what the PEO hands back at the end: payroll history, tax filings and benefit records.

None of those lines has a public benchmark, and we are not going to invent one. What matters is that every quote answers all seven, in writing, so the converter above is comparing like with like.

How much does a PEO cost on a real payroll? A worked example

NAPEO puts the average PEO client at about 21.7 worksite employees, so take a 20-person business paying an average of $46,000 a year and the two illustrative quotes used in the chart above. At 3% of payroll the fee is 3% of $920,000, or $27,600 a year. At $115 per employee per month it is $115 x 20 x 12, also $27,600 a year. The two quotes are identical at that wage by construction, which is the point: give the same business a year of 4% raises and the percentage quote rises to $28,704 while the flat quote stays at $27,600. These are illustrative numbers, not a price range; the method is what transfers.

Frequently asked questions