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
| Percentage of gross payroll | Per employee per month (PEPM) | |
|---|---|---|
| Quoted as | A percentage, applied to gross wages | A dollar figure per employee, per month |
| Moves with | Raises, overtime, bonuses, headcount | Headcount only |
| Suits | Employers with stable, lower wages | Employers with higher wages or heavy overtime |
| The trap | An overtime-heavy quarter raises the fee with no extra administration behind it | A part-time or seasonal roster costs the same per head as a full-time one |
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 programme, 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.
The state unemployment assumption is where quotes drift
Unemployment tax rates are experience-rated and vary by state and by employer. Depending on the state and the structure, a PEO may report under its own account or yours, and the rate assumed in a quote may not be the rate you end up paying. A quote that models your SUTA at a favourable rate can look several thousand dollars a year better than one that models it honestly. Ask which rate each quote assumed, and put both on your own number.
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.
PEO quote normaliser
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 programme 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 organisations. 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.
Frequently asked questions
How much does a PEO cost?
PEOs quote in one of two units: a percentage of gross payroll, or a flat amount per employee per month. No public authority publishes a benchmark fee, and figures circulating online are vendor estimates rather than measured data. The number that matters is the administrative fee shown as a separate line, converted onto your own headcount and payroll, because most of a PEO invoice is pass-through wages, employer payroll taxes, workers' compensation premium and benefit premiums that you would pay regardless.
Is percentage of payroll or per employee per month better?
It depends on the shape of your payroll rather than on which figure looks smaller. A percentage-of-payroll fee rises with raises, overtime and bonuses even though the administrative work does not, which penalises overtime-heavy operations. A per-employee-per-month fee charges the same for a part-time worker as for a full-time one, which penalises employers with large part-time or seasonal rosters. Convert both quotes to an annual figure on your own census before deciding.
What is included in a PEO invoice?
Typically gross wages, the employer share of payroll taxes including FICA, FUTA and state unemployment tax, workers' compensation premium, elected benefit premiums, and the PEO's administrative fee. Only the last of those is the price of the service; the rest is money the employer would spend anyway. A percentage quote may be calculated on some or all of the pass-through items, which is why two quotes carrying the same percentage can differ substantially.
What is a certified PEO and does it matter?
A CPEO is a PEO the IRS has certified under a voluntary programme created by the Tax Increase Prevention Act of 2014, requiring a US physical business location, a history of financial responsibility, organizational integrity and tax compliance, and management with employment tax expertise. Under 26 U.S.C. section 3511 a certified PEO is treated as the employer, and no other person is treated as the employer, of a work site employee for employment tax purposes on wages it remits. The IRS publishes the list of certified organisations, so the claim is verifiable.
What is the difference between a PEO and an EOR?
A PEO co-employs workers you recruited and manage, sharing employer responsibilities while you keep direction and control. An employer of record becomes the sole legal employer, which is what allows a company to employ someone in a jurisdiction where it has no legal entity. The PEO is an administrative arrangement over your own workforce; the EOR is a legal-entity substitute.
How large is the PEO industry?
NAPEO reports 523 PEOs in the United States serving over 208,000 client businesses and roughly 4.5 million worksite employees, at an average of about 21.7 worksite employees per client, for 2022. The association also reports that around 14 percent of employers with 20 to 499 employees use a PEO.
What are PEO fees?
A PEO fee is the charge for the service itself, and it arrives in one of two shapes: a percentage of gross payroll, or a flat amount per employee per month. Everything else on the invoice — wages, payroll taxes, the workers' compensation premium, benefit premiums — is pass-through cost you would be paying anyway. We publish no fee benchmark, because no public authority publishes one. What this page does instead is convert two quotes into the same unit so they can actually be compared.
What is the PEO cost per employee?
It depends which model you were quoted, and the two are not comparable until you convert them. A percentage-of-payroll fee scales with wages; a per-employee-per-month fee does not move with pay at all. Convert both to an annual dollar figure per employee before comparing: $115 per employee per month is $1,380 a year, which is exactly what a 3% rate costs on a $46,000 wage. Above that wage the percentage is dearer; below it, the flat fee is.
A PEO handles the people you have. We help you find the next ones.
Recruitment advertising is a separate line from the administrative one, and a more measurable one: employer job ads on Facebook and Instagram, with the cost per applicant reported and the management fee inside it.
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