Workers Comp Verification for Contractors, State by State

Workers comp verification is the process of confirming that a contractor carries an active workers' compensation policy (or a valid exemption) before they work for you, and that the coverage stays current for as long as they do. It matters because liability for an uninsured subcontractor's injury often rolls uphill: in many states, the hiring company becomes the statutory employer and picks up the claim.

This guide covers what to check on every workers' comp policy, how the rules differ across key states, where exemptions get contractors into trouble, and how to build a re-verification routine that catches lapses. It pairs with our contractor onboarding verification checklist, where comp coverage is one of seven checks every contractor should clear.

Last reviewed September 30, 2026. This is an operational framework, not legal advice. Confirm requirements with counsel or compliance professionals familiar with your jurisdictions and contracts.

What exactly are you verifying?

A workers' compensation policy is the employer's insurance against workplace injury claims. Verifying it for a contractor means confirming four things:

1. A policy exists and is active. Carrier name, policy number, and effective and expiration dates, preferably from a certificate sent by the broker, not a photo on the contractor's phone.
2. Coverage is valid where the work happens. A policy written in one state does not always cover work in another; some states require a local endorsement or a separate in-state policy.
3. The named insured matches your contractor. A policy in the owner's personal name does not cover the LLC you hired.
4. Any exemption is real and current. Exemption claims need paperwork: a filed exemption certificate, within its validity period, from the right state authority.

If any one of those four fails, the verification fails.

Why do the rules differ so much by state?

Workers' comp is a state-law regime, and the states genuinely disagree about who must carry coverage. A few contrasts that trip up multi-state teams:

California requires every contractor with employees to carry workers' comp, and the Contractors State License Board (CSLB) treats proof of coverage, or a valid exemption, as a condition of licensure. Sole proprietors with no employees can file an exemption, but five classifications, including roofing (C-39) and asbestos abatement (C-22), must carry coverage whether or not they have employees. Per the CSLB, all active licensees will be required to hold workers' comp insurance starting January 1, 2028, regardless of headcount. Source: CSLB workers' compensation requirements.

Florida requires construction businesses with one or more employees to carry coverage, and the general contractor is responsible for confirming subcontractors are covered. Exemptions are strict: officers or LLC members in construction must own at least 10 percent of the company, no more than three officers per corporation may be exempt, and each application costs $50. Exemptions last two years and the state sends no renewal reminders. Source: Florida Division of Workers' Compensation exemption guidance.

Texas is the outlier: it does not require private employers to carry workers' comp at all. Contractors can opt out, though they lose exclusive-remedy protection and can be sued directly by injured workers. Many project owners simply require coverage by contract, so "optional by law" rarely means "optional on the job."

Washington runs a monopolistic system through the Department of Labor & Industries: employers pay premiums into the state fund based on hours worked and risk classifications. New York requires coverage for essentially all employers with at least one worker; sole proprietors without employees must formally file for exemption with the Workers' Compensation Board.

The practical takeaway: never assume the rules in the contractor's home state apply where your project is. Verify against the rules of the state where the work is performed.

Where do exemptions go wrong?

Exemptions are where most verification programs break down:

• Stale exemptions. Florida's last two years; other states vary. Nobody reminds the contractor to renew.
• Bogus claims. The CSLB found that while about 55 percent of California contractors claim to have no employees, its own research suggests many of those claims are false. An exemption on file with the board is checkable; an oral claim is not.
• Wrong entity type. Most exemption rules care about entity structure. California's proposed criteria require an individual owner, not a partnership, corporation, or LLC. A contractor who incorporated may have silently lost eligibility.
• Exempt owner, non-exempt crew. In Florida construction, the officer exemption does not cover the company's employees.
• Exemption in the wrong state. A valid Texas exemption may still not cover a project in California or New York.

When a contractor claims exemption, get the certificate from the issuing authority and check its effective and expiration dates yourself.

What should you check on every policy?

Build a five-minute review into onboarding and every renewal:

• Carrier, policy number, and dates. Confirm the policy period covers your project dates with no gaps.
• Named insured matches the contract. Watch for dba names, trade names, and the owner's personal name standing in for the business entity.
• Coverage territory. Confirm the policy covers the state where the work happens, with endorsements for out-of-state work where needed.
• Certificate source. Get the certificate from the broker or carrier, not the contractor. Brokers can also confirm the policy has not been cancelled mid-term, which a certificate alone cannot tell you.
• Exemption certificates, when applicable. Pull the actual certificate from the state authority and check its dates, entity name, and validity period.

How do you verify coverage after onboarding?

Policies lapse, exemptions expire, and entities change shape. A working re-verification routine has three parts:

1. Calendar every date. Log the policy expiration date and the exemption expiration date at intake. Set reminders at 90, 60, and 30 days out. A lapse should block new work assignments, just like a lapsed license does.
2. Spot-check against the carrier. At renewal, ask the broker to confirm the policy is active rather than accepting a forwarded certificate at face value. Random audits between renewals catch contractors who stop paying premiums.
3. Re-verify on entity changes. A contractor who incorporates or restructures may lose exemption eligibility or outgrow the entity named on the policy. Any change in legal structure triggers a fresh verification.

Pair comp re-verification with your license recheck cadence. Insurance and licensure go stale on the same schedule, and a contractor who lets coverage lapse often lets the license slide too. Our guide on how often to recheck contractor licenses recommends aligning both checks so neither falls through the cracks.

When is a spreadsheet no longer enough?

Manual verification works for a handful of contractors and one owner. It breaks somewhere around 30 to 50 active vendors, or the moment project managers start saving certificates in personal email threads.

Automating workers comp verification gives you three things: extraction that reads carrier names, policy numbers, and dates out of uploaded documents; rule engines that compare each document against your requirements and flag gaps; and monitoring that alerts you before an expiration instead of after a lapse.

StateLicense covers CA, FL, NYC, OR, TX, VA, and WA, and the license verification API returns status, insurance, and bond data in one call, so comp verification can run alongside license checks instead of as a separate manual chore.

FAQ

Do sole proprietors need workers' comp?

It depends on the state. California allows sole proprietors with no employees to file an exemption (except in the five classifications that must carry coverage). New York requires sole proprietors without employees to formally file for exemption with the Workers' Compensation Board. Texas does not require coverage at all. Always check the rules of the state where the work happens.

What is the difference between an exemption certificate and a policy?

A policy is actual insurance. An exemption certificate is the state's formal permission for a specific entity to go without it, subject to strict eligibility rules. They are not interchangeable, and an exemption has its own expiration date.

Can I just collect a certificate of insurance and be done?

No. A certificate proves coverage on the day it was issued. Policies cancel mid-term, exemptions expire, and certificates can name the wrong entity. Verification needs a re-verification routine behind it.

Checklist: verify workers' comp in five minutes

• Get the certificate from the broker or carrier, not the contractor.
• Confirm the named insured matches the legal entity in your contract.
• Check the policy period covers your project dates; confirm coverage territory includes the work state.
• If exempt, pull the exemption certificate from the issuing authority and check its dates and entity name.
• Log the expiration date and set 90/60/30-day reminders.
• Block new work if coverage lapses; re-verify from scratch after any entity change.