Guides
PEOs and workers' comp: co-employment explained
How PEO co-employment works for workers' comp, the three NCCI policy models, who gets the experience mod, what the IRS CPEO program omits, and what to ask.
A professional employer organization (PEO) becomes the co-employer of your workers for payroll, benefits, HR and, usually, workers' compensation. The comp coverage typically sits on a policy the PEO buys, and you pay the PEO a fee that includes a share of that cost. That can simplify administration and sometimes lower cost, but it changes who holds the policy, whose experience mod is used and what happens to your claims history, and the rules for all of it are set state by state.
What co-employment means for comp
In a PEO arrangement, the PEO and the client share employer responsibilities under a client service agreement. The PEO usually runs payroll and employment taxes, offers benefits through its group plans, and provides workers' comp coverage for the "worksite employees." The client keeps day-to-day direction of the work and, importantly, responsibility for worksite safety and compliance, as the industry group NAPEO notes. Many states statutorily recognize the PEO as an employer or co-employer for workers' comp, which is how the PEO's policy can cover the client's workers; the details are in state law and the agreement. See professional employer organization for the definition.
Co-employment does not erase the client's exposure. The client can still face OSHA obligations, claims from third parties, employment practices exposures and, if the PEO's coverage fails, direct liability for injured workers in many states. Do not assume the client has no comp responsibility; ask each state.
The three policy models
NCCI describes how PEO comp is written in its PEO guidance. The three models are:
| Model | How it works | Whose mod applies |
|---|---|---|
| Master policy | One standard policy in the PEO's name covers the leased workers of many clients (and the PEO's own staff) | Generally the PEO's mod, with state-specific transition rules |
| Multiple coordinated policies | Each client has its own policy in its own name and FEIN covering its leased workers, coordinated with the PEO | The client's own mod |
| Multiple PEO policies | Each client has its own policy that names the PEO as primary insured | Depends on state and carrier rules |
State rules shape which model is permitted or required:
- Some states require a PEO to provide comp coverage for leased workers under a master policy unless the client has its own policy; Oregon is one example in NCCI's materials.
- Some states, Kansas among them, allow a master policy only if the regulator is satisfied that each client's experience can be reported under NCCI's experience rating plan and statistical plan.
- Texas has a specific rule for experience rating when an agreement runs more than two years: the premium for covered employees can be calculated using the lower of the client's mod before the agreement and the PEO's mod.
These are examples, not a rule everywhere. Use the workers' comp and benefits requirements by state and NCCI's state PEO pages, and ask the PEO how it handles each state where you have people.
The mod and your claims history
Under a master policy, your claims go on the PEO's record. For a clean-record employer with a mod below the PEO's, joining may raise the effective cost of comp, while a company with a poor mod may find the PEO's pooled mod attractive. The transition is the issue. When you leave a PEO, your ability to show your own experience matters, because a business with no history may be treated as having a unity mod of 1.00 (per NCCI) and a business with unreported experience may land in a surprising place. Before you sign, ask:
- Will my claims be reported to NCCI or the state bureau under my own FEIN, so I keep my experience?
- Will I receive client-specific loss runs on request, and how often?
- If I leave, what happens to open claims, and who handles them?
- How is the premium allocated to me, by class code and payroll, and is that visible?
If the answers are vague, your next carrier will have trouble pricing you and you may end up in the assigned risk and residual markets for workers' comp market. loss runs: what they are and how to request them explains the request process.
Pricing: what the PEO's fee hides
PEOs generally charge either a percentage of payroll or a per-employee fee for services, plus a pass-through or bundled rate for workers' comp. The comp part may be billed at the manual rate for your classifications, at an adjusted rate, or as part of a single combined rate. Ask for it separately so you can compare with a direct policy: the how workers' comp premiums are calculated guide shows the arithmetic of payroll, class code rate and mod. Note whether the PEO's premium is subject to premium audit adjustments that it passes on to you, and whether payroll is limited or classes are altered between your direct experience and the PEO's blended arrangement.
The IRS CPEO program is a tax program, not a comp program
The IRS certifies professional employer organizations (CPEOs) under Internal Revenue Code section 3511. A CPEO is treated as the employer of its worksite employees for federal employment-tax purposes on wages it pays, and CPEOs must meet financial and bonding requirements, with the client generally relieved of those federal employment taxes if the contract is properly reported to the IRS on Form 8973 (IRS CPEO program). Section 3511 applies only to federal employment taxes. It says nothing about who must carry workers' comp, how the policy is written or whose mod applies. A PEO that is a CPEO can still have a weak comp program, so check the state side separately.
Questions to ask before signing
- Which of the three policy models does the PEO use in my state, and who is the carrier?
- Is the carrier rated by AM Best, and is the PEO's comp program financially sound (what happens to my workers if the PEO fails)?
- Whose mod will be used, and how is my experience reported?
- Will I receive my own loss runs, with claim-level detail, each quarter?
- How are premium and audit charges allocated to me?
- What are my safety obligations, and does the PEO provide loss control?
- What happens to open claims and records when the agreement ends?
- Does coverage extend to every state where I have employees (employees in several states: other-states coverage and multistate workers' comp)?
Hypothetical example
Say a 12-employee marketing agency in a clerical class, with a mod of 0.85 on its own policy, is offered a PEO. The PEO's quote bundles comp into a single rate. The owner asks for the comp component separately and finds it above what the agency pays directly, given its mod. A different business, a 9-employee contractor with a 1.35 mod, may find the PEO's pooled rate lower. The decision depends on the agency's experience, the state, and the full fee, and an independent comparison tells the owner which.
Key takeaways
- A PEO co-employs your workers; comp usually sits on the PEO's policy, but the client keeps safety and compliance responsibility.
- NCCI describes three models: master policy, multiple coordinated policies and multiple PEO policies; state law decides what is allowed, and who gets the mod.
- Ask how your claims history will be reported and kept so you can leave the PEO with your experience intact.
- IRS CPEO certification (section 3511) concerns federal employment taxes only, not comp coverage.
- Compare the comp component with a direct quote using the workers' comp premium calculator and your state's rules.