Comparing PEOs is hard for a specific reason: the biggest line items on a PEO invoice are your own costs passing through, so two honest quotes for the same company can look wildly different while describing similar services. A fair comparison starts from checkable facts, IRS certification, accreditation and state licensing, then normalises the money so fee is compared with fee and insurance with insurance. This page gives that method, grounded in IRS and industry sources; service agreements control, and nothing here is legal or tax advice.
Start from the checkable facts
Three lookups cost nothing and filter hard. The IRS maintains a public list of certified professional employer organizations under its voluntary CPEO program, established by the Tax Increase Prevention Act of 2014; presence on it is verifiable in minutes. ESAC, the industry's accreditation and financial assurance body, has operated for around three decades and reports that nearly 73% of PEO industry wages flow through accredited organizations; its register is public too. And a handful of states license PEOs directly, Florida's employee leasing license being the clearest example, with an online lookup. A provider missing from all three lists is not necessarily bad, but every claim it makes will need private verification that the listed providers get for free.
Compare the liability position, not just the price
The IRS's third-party arrangement rules create a real difference between look-alike providers. A certified PEO files aggregate employment tax returns under its own EIN and is generally solely liable for the customer's employment taxes on wages paid to worksite employees. A payroll service provider or reporting agent files under your EIN and leaves you liable; an uncertified PEO has no statutory liability shift at all. Two quotes that differ by a modest monthly amount may therefore be pricing different risk positions: the cheaper one can leave your company holding federal tax exposure if remittances go astray. Put the certification status of each finalist in your comparison table as its own row, next to price.
Normalise the quotes before reading them
Ask every finalist for the same four numbers at your actual census: the administration fee expressed both as flat per-employee and as a share of payroll; the workers compensation premium for your classification codes; the health plan rates for your census on comparable plan designs; and every one-time or exit charge. Pass-throughs like employer taxes should be identical across providers for identical wages, so any gap there is a modelling error or a hidden margin, and either finding is useful. Then run the totals at this year's payroll and at your planned headcount, because percentage-priced deals and flat-fee deals cross over as teams grow and salaries rise.
Weight the service dimensions you will actually feel
After the arithmetic, the differences that matter are operational. Who answers when a state notice arrives, a named person or a queue? How are multi-state registrations handled and evidenced? What happens at exit: notice period, benefits continuation, and whether your workers compensation claims history is provided in a form a future insurer accepts? References from clients your size in your states answer most of this faster than a sales cycle will. The best comparison ends with two providers whose numbers you have normalised and whose exits you have priced; at that point either choice is defensible, which is what a comparison is for.
Questions people ask about peo compare
What is the single most useful thing to compare between PEOs?
Certification status, because it is checkable and changes your legal position: a certified PEO is generally solely liable for federal employment taxes on worksite employee wages, while uncertified arrangements leave that liability with you. Price matters, but this is a different kind of difference.
Why do PEO quotes vary so much for the same company?
Because most of the invoice is pass-through driven by your wages, codes and census, priced through each provider's master policies. Normalise by comparing administration fee to administration fee and insurance line to insurance line; big gaps usually live in the insurance.
Is accreditation worth anything in a comparison?
ESAC accreditation adds independent financial assurance and covers the majority of industry wages, so it is a meaningful screen. It is voluntary, so absence is not disqualifying, but an accredited provider has been examined by someone with no stake in the sale.
How many providers should make the shortlist?
Three finalists is usually right: enough for real price tension, few enough to normalise quotes properly. Screen the long list on the public lookups first so the effort of normalisation is only spent on providers whose basic claims are already verified.