You’re running a remodel in Norman and you’re behind. A drywall crew you’ve used once before says they can start Monday. They’re good, their price is right, and nobody asks for paperwork. Six months later, your workers’ comp audit comes back with an extra $40,000 of “subcontractor cost” added to your payroll, and a bill to match. Worse, one of that crew’s guys hurt his back on your job. When a sub doesn’t carry insurance, the cost doesn’t disappear. It usually moves up to you. In Oklahoma that can happen two ways: through your premium audit, and through the workers’ comp law itself.

Why would I be responsible for a sub’s injured worker?

Oklahoma’s workers’ compensation law says so directly. Under 85A O.S. § 36, if a subcontractor fails to secure the workers’ comp coverage the law requires, the prime contractor is liable for compensation to the subcontractor’s employees, unless an intermediate sub in between has coverage.

The law does let the prime contractor, or its insurer, try to recover what it paid from the uninsured sub, including a lien on money still owed to them. In practice, collecting from a small crew that didn’t buy insurance in the first place is often harder than it sounds.

There’s a narrow exception for subs who aren’t required to carry comp, such as a one-person operation with no employees. Those subs can file an Affidavit of Exempt Status with the Oklahoma Workers’ Compensation Commission. An unexpired affidavit generally protects the prime contractor for that individual. It expires two years from the date it was filed, and it doesn’t cover anyone the sub hires.

How does an uninsured sub show up on my audit?

Most contractors’ workers’ comp and general liability policies are priced on an estimate, then audited after the policy year. The auditor asks for payroll, and also for what you paid subcontractors.

  • If a sub gave you a valid certificate showing their own coverage for the time they worked, their cost is usually left out of your premium.
  • If a sub had no proof of insurance, many insurers treat what you paid them as if it were your own payroll, classified by the work they did. Your premium is recalculated on that higher base.

That’s how a profitable job turns into a surprise invoice in the spring. We wrote more about this in contractors: how to avoid costly audit surprises, and in the 3 most common insurance audit mistakes.

Here’s an illustration, not a quote

Say you paid an uninsured framing sub $40,000 over the year. If the auditor adds it to your payroll under a framing class, the extra workers’ comp premium depends on that class’s rate. At a hypothetical rate of $10 per $100 of payroll, that’s $4,000 more for comp alone, before any general liability adjustment. If one of the sub’s workers is badly hurt on your job, the claim can be much larger than the audit bill.

What about liability, not just workers’ comp?

If an uninsured sub’s work damages a customer’s property or injures someone, the claim often comes to you as the contractor who hired them. Your general liability policy may respond, but now your loss history carries their mistake. A sub with their own liability policy, who names you as an additional insured, gives the claim somewhere else to go first. Our archive pieces on when you’re liable for subcontractors’ work and additional insured endorsements go deeper.

What should I collect before a sub starts?

Before the first day on site, not after the job:

  • A certificate of insurance showing general liability and workers’ comp, with dates that cover the whole job
  • Your business listed as certificate holder, and as additional insured if your contract requires it
  • For a one-person sub with no comp, a copy of their unexpired Affidavit of Exempt Status
  • A short written subcontract that requires insurance and lists minimum limits
  • A reminder on your calendar to collect a new certificate when theirs renews mid-job

A certificate is a snapshot, not a promise, which we explained in certificates of insurance: what they do and don’t prove. Keep them organized by job and year so the auditor can see them.

Let’s check your subs before your next audit

If you use subs and haven’t looked at how your workers’ comp and liability audits treat them, take a look at our contractors insurance options and workers’ comp coverage, or start a commercial quote. You can also call (405) 701-5368.

Run a trade? Our HVAC contractor insurance, electrical contractor insurance and plumbing contractor insurance pages show how subs fit into a trade insurance program.

This article is general information about how coverage typically works, not advice about your specific situation. No two insurance contracts are the same, and your policy is the only thing that says what you have. If you’d like someone to read it with you, that’s what we’re here for.