Comparing PEOs on their websites is comparing marketing departments: every vendor offers payroll, benefits, workers' compensation and compliance support, described in nearly identical language. The differences that will matter to you in year two are structural, and they are discoverable before signing if you compare in the right order: certification status first, because it decides where tax liability sits; then true cost on your actual census; then how the benefits and workers' compensation are structured in your state; then the exit terms, which nobody reads until they need them. This page is that sequence, with the official sources that let you verify rather than trust.
Start with certification, because liability follows it
The IRS certifies PEOs voluntarily, and the difference is not a badge. A certified PEO is solely liable for federal employment taxes on remuneration it pays to work site employees; with a non-certified PEO, IRS third-party payer guidance says the client generally remains responsible as common law employer if taxes go unpaid. Verification is free: the IRS publishes quarterly public listings of certified organizations, along with lists of those suspended or revoked. Non-certified PEOs can still be sound businesses, but you are then relying on their financial controls with your tax liability, so the diligence bar on everything else rises. Sorting your shortlist by verified certification first takes minutes and reorders it more reliably than any ranking site.
Compare true cost, not headline fee
PEO pricing arrives as a percentage of payroll, commonly quoted in the low single digits and ranging to 15% per the US Chamber's overview, or as a flat per-employee monthly fee. Neither number is comparable across vendors until it is decomposed, because quotes bundle differently: one vendor's fee includes workers' compensation and another's bills it as a pass-through; state unemployment taxes may run at the PEO's rate or yours. The only clean method is a specimen invoice for your actual census, with administrative fee, insurance costs and taxes on separate lines, from every vendor on the shortlist. A vendor that resists itemising a quote is answering a diligence question by resisting it. Percentage-of-payroll pricing also silently raises fees with every raise you give; per-employee pricing does not.
Structure, then exit terms
Two structural questions decide most of the year-two experience. On benefits: who sponsors the health plan, which carrier underwrites it, and what have renewals looked like for the past few cycles, since first-year teaser pricing followed by sharp renewals is the industry's oldest pattern. On workers' compensation: which policy model applies in your state, master policy or client-level coordinated policies, because that decides whose experience modification your premiums follow and what you must reconstruct on exit. Then read the exit clauses before signing: notice period, what payroll records and claims data you receive and in what format, and what happens to benefits mid-plan-year. NAPEO's consumer FAQ describes the standard service scope, which is a useful baseline for spotting where a specific proposal deviates. The service agreement controls everything; this page is a checklist, not advice.
Questions people ask about peo comparison
What is the single most important check when comparing PEOs?
Certification status against the IRS public listings, verified on the list itself rather than the vendor's website. It determines whether the PEO or your company is ultimately liable for federal employment taxes on covered wages, which outweighs any feature difference.
How should I compare PEO prices?
Request a specimen invoice for your real census from each vendor with fees, insurance and taxes itemised separately. Bundling differs enough between vendors that headline percentages, typically quoted between 2% and 15% of payroll, are not comparable on their own.
Do PEO benefits get more expensive after the first year?
Renewal increases are common enough that renewal history is a standard diligence request. Ask each vendor for several past renewal cycles on plans like the one you are quoted, and be wary of first-year pricing that no vendor will contextualise.
What exit terms should a PEO contract include?
Defined notice, delivery of complete payroll records and workers' compensation loss runs in a usable format, and a stated process for benefits continuity. Leaving is when structure gets tested, and the terms are only negotiable before you sign.