Workers' compensation is often the single biggest reason a company joins a PEO: the PEO provides the coverage and manages the claims, and for businesses in hard-to-place or high-premium classes it can be the difference between insurable and not. But how that coverage is structured varies by state and by PEO, and the structure decides whose claims history sets your rate, what happens to your experience modification factor while you are inside the arrangement, and what you walk away with if you leave. NCCI, the rating bureau for most US states, documents two distinct models, and a buyer should know which one they are being sold before signing.
The two policy models: master policy and MCP
Under a master policy, NCCI describes a single standard workers' compensation and employers liability policy written in the name of the PEO, covering the leased workers of multiple client companies alongside the PEO's own staff; the PEO is the primary named insured and clients sit under its umbrella. Under the multiple coordinated policy model, or MCP, each client company gets a policy in its own name for its leased workers, the PEO holds a separate policy for its direct employees, and endorsements coordinate the coverage. Which model applies is not a free choice: state rules differ, and NCCI notes that voluntary and residual market rules can differ within the same state. Some states use the master model, others require MCP, so the same national PEO can be structured differently for you depending on where your payroll sits.
Experience rating: the part that follows you
The experience modification factor is where the model choice bites. Under an MCP, each client's policy is experience-rated on its own claims, so a clean loss history keeps earning its discount and stays visibly yours. Under a master policy, client experience is pooled with the PEO's book, and Marsh McLennan Agency's explainer on PEO policy models flags the consequence: a client with a favourable loss record can find its rate shaped by the pool rather than its own history, and on exit its standalone mod must be reconstructed. NCCI's procedure for that reconstruction is specific: a client leaving a master policy arrangement submits its data via the NC2745 form so a separate experience rating can be calculated. Ask any PEO, before joining, exactly what claims data you will receive and in what format, because your future standalone premium depends on it.
What the PEO actually does for claims and compliance
Beyond placing the policy, PEOs run the claims process: reporting, carrier liaison, return-to-work coordination and often safety programs, which NAPEO lists among the standard services of the model. For a small employer this is real value; a poorly managed claim inflates future premiums for years. But responsibility for worksite safety itself stays with the client under the co-employment split, so the PEO's loss-control advice only helps if you implement it. Verify three things in the agreement: the identity of the licensed carrier behind the coverage, since the PEO is an arranger rather than an insurer; which states the arrangement is filed in, matching everywhere you have payroll; and how mid-term additions of new states or classes are handled and priced.
Questions people ask about work comp peo
Who is the named insured on work comp through a PEO?
It depends on the model. Under a master policy the PEO is the primary named insured and clients are covered under it; under a multiple coordinated policy each client company is the named insured on its own policy, coordinated with the PEO's. State rules often dictate which model applies.
Does joining a PEO erase a bad experience mod?
Entering a master policy arrangement can submerge your history in the PEO's pool, which is sometimes the sales pitch, but state rules increasingly require carrying experience in and reconstructing it on exit. NCCI's NC2745 process exists to calculate a separate rating for departing clients.
What should I get in writing before leaving a PEO?
Your complete loss runs and payroll data by state and class code, in a format an underwriter will accept. Without them, reconstructing your standalone experience rating and getting quoted in the open market is slow and expensive.
Is the PEO the insurance company?
No. The PEO arranges coverage under a policy issued by a licensed carrier and manages the program and claims. Confirm the carrier's identity and the policy structure in the service agreement; the policy documents control what is covered.