The PEO industry has 500+ providers. The difference between a good fit and a bad one for your business can be six figures over a three-year contract. Most "best PEO" lists online are either thinly-researched affiliate roundups or marketing pieces written by the PEOs themselves.
This page explains exactly how we evaluate the PEOs we review and recommend. It is here so you can judge our work on its methodology, not just its conclusions.
Who we are
PEO Clarify is an independent PEO advisory practice of IMA Financial Group, a privately held insurance and benefits brokerage founded in 1981. The practice is led by Peter Sustr, National PEO Solutions Leader at IMA, whose background spans employee benefits across Anthem, Hartford, and Chubb.
We are advisors, not a PEO. We do not own or operate a PEO. We place businesses with PEOs that fit, after running a competitive evaluation on their behalf.
Our commercial disclosure: Six PEOs — ADP TotalSource, TriNet, Paychex, G&A Partners, Justworks, and Rippling — pay us a broker-of-record commission when we place a client with them. When a client's best fit is outside those six, we place them with a non-partner and we say so. We never accept payment for favorable reviews. This disclosure appears on every review page on this site.
Which PEOs we cover
We actively track more than 40 PEOs in the U.S. market. We publish detailed reviews for PEOs that meet at least two of the following:
- NAPEO membership or IRS CPEO certification (signals financial stability and industry accountability)
- Serves at least 5,000 worksite employees (signals operational scale that makes benefits pooling viable)
- Meaningful search volume or client interest (we prioritize what businesses actually ask about)
- Firsthand experience placing clients with the provider in the last 24 months
We will flag exclusions explicitly. If a PEO lacks CPEO certification or has been subject to a regulatory action, we say so in the review.
The seven criteria we score on
1. Financial stability and certification
IRS CPEO status, NAPEO membership, ownership structure, public or private financial reporting, bond status, regulatory history. A financially unstable PEO is a liability regardless of its pricing.
2. Benefits quality
Health insurance carriers in the master plan, geographic network strength, plan design options, dental/vision/life/disability depth, 401(k) plan quality, EPLI coverage terms. Benefits drive 60 to 75 percent of total PEO spend and most of the value.
3. Pricing transparency
Whether pricing models (PEPM vs percentage) are clearly presented, how line items are broken out in proposals, annual rate-increase caps, and how closely actual year-one pricing matches initial quotes.
4. Service quality
HR business partner caseload, response time commitments, availability of in-house employment counsel, named account team, onboarding quality. We incorporate direct client reference calls wherever possible.
5. Technology platform
HRIS usability, employee self-service depth, mobile access, time and attendance, reporting, integration with payroll and benefits. Weighted lower than benefits and service because tech improvements happen faster than service improvements.
6. Industry and multi-state fit
State-specific expertise where compliance actually differs, industry-specific experience (construction, healthcare, hospitality, professional services), workers comp pool match with client risk profile.
7. Contract and exit terms
Contract length, termination notice period, early termination fees, rate-increase language, data portability. How a PEO treats clients who are leaving tells you how it will treat you when you are not its priority.
How we gather information
Our reviews pull from five sources:
- Firsthand proposal and contract data from clients we have placed or evaluated with each PEO in the past 24 months
- Published sources: SEC filings for public parent companies, NAPEO membership directory, IRS CPEO public listing, Better Business Bureau, Department of Labor records, state PEO registration databases
- Direct conversations with PEO sales and service representatives, scheduled independently (not as part of a client proposal process)
- Client reference calls: unprompted feedback from businesses currently or recently on each PEO
- Independent market data: Kaiser Family Foundation Employer Health Benefits Survey, SHRM HR benchmarking reports, Bureau of Labor Statistics workers comp data
We do not use PEO-provided sales decks or marketing materials as our primary source for any rating category.
How often we update
Every review page displays its last-updated date. We commit to:
- Quarterly review of pricing ranges, benefit carrier changes, and contract language
- Immediate update when a material change occurs (ownership change, CPEO status change, regulatory action, major platform launch)
- Annual deep refresh of every review page to keep the analysis current
What we do NOT do
Our credibility depends on what we refuse as much as what we include.
- We do not accept payment, gifts, or consideration for favorable reviews or for moving a PEO up our rankings
- We do not publish reviews of PEOs we have not evaluated against our seven criteria
- We do not use AI-generated boilerplate as a substitute for firsthand analysis
- We do not hide our commission relationships. Every review page identifies which PEOs pay us a broker commission
- We do not steer clients toward higher-commission PEOs when a lower-commission or non-partner PEO is a better fit
When we are not the right advisor
We are specific about when we will tell a prospect to look elsewhere:
- Companies under 5 employees — a payroll service plus a benefits broker is usually a better fit
- Companies over 500 employees with mature in-house HR — you usually have the scale to go direct
- Companies in industries where we do not have placement experience (certain regulated industries, international-headquartered entities with U.S. subsidiaries under 10 people)
- Companies looking for a pure HR outsourcing (ASO) relationship without co-employment
How to reach us if you disagree
If you are a PEO and believe something on our site is factually wrong, email peter.sustr@imacorp.com. We update reviews when we are shown to be wrong.
If you are a business owner and want to challenge a recommendation we have made to you, ask us to walk through the specific evaluation logic. We will show our work every time.
Ready for a PEO evaluation?
We apply this methodology on your behalf, at no cost to you. Book a 30-minute conversation and we will tell you honestly whether a PEO makes sense and which ones fit.
Book a Free AssessmentRelated: Our 6 PEO partners · How to choose a PEO · PEO pricing explained