The practical answer
A workers compensation certificate is the piece of paper standing between you and a claim from somebody else's injured employee. If the coverage is not there, most state statutes will look up the chain, and the hiring business can end up carrying the claim.
The workers compensation line is also the one where certificates mislead most often, because coverage is state law rather than contract, owners can exclude themselves from their own policy, four states do not use private carriers at all, and the certificate face shows none of that.
Reading the workers compensation row on an ACORD 25
- PER STATUTE means benefits are set by state law, so no dollar limit is printed. That is normal and not a gap.
- E.L. EACH ACCIDENT, E.L. DISEASE EA EMPLOYEE and E.L. DISEASE POLICY LIMIT are employers liability. This is the part that answers a lawsuit rather than a benefits claim, and it is the limit your contract should specify. One million on all three is a common requirement.
- ANY PROPRIETOR / PARTNER / EXECUTIVE OFFICER / MEMBER EXCLUDED? is the field that changes everything. A Y means an owner has opted out of coverage on their own policy.
- The SUBR WVD column, if your contract requires a waiver. On workers compensation the endorsement is normally the NCCI WC 00 03 13.
- The policy period, and whether the states where your work happens are actually on the policy.
The officer exclusion trap
Most states let owners, officers, partners and LLC members exclude themselves from workers compensation coverage. It is legal, and it lowers the premium, which is why small contractors do it.
On a two-person company where both owners are the people doing the work, an excluded-officer policy can mean nobody who sets foot on your property is covered. The certificate still shows a valid workers compensation policy with a policy number and dates. Read the exclusion box, and where the crew is the ownership, either require the exclusion removed for your work or treat the vendor as uncovered for comp.
Monopolistic states and state funds
North Dakota, Ohio, Washington and Wyoming are monopolistic: workers compensation is bought from the state fund, not from a private carrier. A private ACORD 25 issued for a business operating in those states will not evidence the workers compensation, because no private carrier wrote it. The proof is a certificate or coverage confirmation from the state agency instead.
Employers liability is a related complication. It is not included in monopolistic state fund coverage the way it is in a private policy, so it is normally picked up by a stop gap endorsement on the general liability policy. If your contract requires employers liability limits from a vendor operating in one of those states, that endorsement is what to ask for.
Several other states run competitive state funds alongside private carriers. Those produce ordinary certificates, but the issuing entity will be the fund rather than a familiar carrier name.
Exemptions and ghost policies
A sole proprietor with no employees often has no legal obligation to carry workers compensation, and several states run registries where they file an exemption. That is a legitimate document, and it is not a certificate of insurance. It says there is no coverage, which is exactly the information you need before deciding whether to let them work.
A ghost policy is the other version: a real workers compensation policy written with the owner excluded and no payroll behind it, bought so the holder can produce a certificate. It is not fraud, and it is also not coverage for anybody. Both cases are caught by the same two questions: who exactly does this policy cover, and will they be the people on my site.
New York is the clearest example of a state that formalized this. The workers compensation board accepts specific coverage forms from carriers and the state fund, and a separate attestation form for businesses claiming they are not required to carry coverage. Requirements differ meaningfully by state, so where the answer matters, check the state agency rather than generalizing.
Verifying independently of the certificate
- Most states publish a proof-of-coverage or coverage verification lookup run by the workers compensation agency or the state fund. It is the only source that reflects a cancellation after the certificate was issued.
- Contractor licensing boards in several states publish workers compensation status alongside the license, which is a useful second source for the trades.
- Call the producing agency printed on the certificate, using the number on the certificate, and confirm the policy is in force and the officer exclusion status is what the document shows.
- Diary the expiry and chase the agency, not the vendor. Comp policies cancel mid-term for non-payment more often than general liability does, and nothing on your side signals it.
- Re-verify when the vendor adds crew. A policy issued when the owner worked alone says nothing about the three people hired since.
Keep coverage decisions human and evidence explicit
CoverWarden records submitted evidence, requirements, findings, and authorized decisions. It does not issue coverage, guarantee claim outcomes, or replace your broker, attorney, or risk professional.
What teams usually ask
What is a workers comp certificate of insurance?
A document issued by an insurance agency, carrier or state fund summarizing a workers compensation policy: the insured, the carrier, the policy number and period, the states covered, the employers liability limits, and whether owners or officers are excluded.
Does a workers comp certificate prove everyone on site is covered?
No. It proves a policy existed when the certificate was issued. Owners and officers can be excluded from their own policy, the policy may not include the state where the work happens, and it can be cancelled after issue. The exclusion box and a state coverage lookup answer more than the certificate does.
What if a contractor says they are exempt from workers compensation?
Ask for the state exemption filing rather than accepting the statement. An exemption is a real document in many states, and it tells you there is no coverage, which is a decision you should make deliberately rather than discover after an injury.
Why does a workers comp certificate show no dollar limit?
Because statutory benefits are set by state law rather than by a policy limit, so the form shows PER STATUTE. The dollar limits on the row are employers liability, which is the coverage that responds to a lawsuit.
Which states do not allow private workers compensation insurance?
North Dakota, Ohio, Washington and Wyoming are monopolistic states where coverage is purchased from the state fund. Proof of coverage comes from the state agency, and employers liability is normally added by a stop gap endorsement on the general liability policy.