Sub Contractor Insurance: What Subs Need and GCs Must Check

Sub contractor insurance is the set of policies a subcontractor carries in its own name. That usually means general liability and workers' compensation, plus commercial auto and sometimes an umbrella. The general contractor's policy typically won't cover you as a sub. If you're the GC, an uninsured sub's mistake or injured worker can land on your policy or come out of your bank account. Most of the real rules come from the subcontract and your state's workers' comp law.

Will the GC's insurance cover me if I'm the sub?

Usually not. Westfield, a commercial insurer, says subcontractors "operate independently and are typically not covered under the contractor's insurance policy" (Westfield). It doesn't matter whether you frame, hang drywall, run the electrical rough-in or set tile. You're a separate business, so you need your own policy.

Now look at it from the other side. When a sub with no liability coverage damages property or hurts someone, Westfield notes the general contractor may be held responsible for the costs. That's why nearly every subcontract has an insurance section, and why the GC's office wants your certificate before you get a gate code or a lockbox combination.

Plenty of remodelers and builders wear both hats. You might hire a plumber and a drywall crew on your own kitchen jobs, then sub out your carpentry to a bigger builder on a custom home. Keep both roles in mind as you read, because the paperwork you demand from your subs is the same paperwork your GCs will demand from you.

What a sub usually has to carry to get on the job

There's no single national rule. Requirements come from three places: the subcontract, your state's workers' comp law and, in some states, your contractor license. Westfield points out that workers' comp for subs with employees is legally required in most states. It also says contracts should spell out the types of insurance, the coverage amounts and how long the policies have to stay in force.

General liability pays when your work injures someone else or damages someone else's property. GCs commonly ask for $1 million per occurrence and $2 million aggregate, according to Contractors Insured, an agency that writes contractor coverage. "Per occurrence" is the most the policy pays for one incident. "Aggregate" is the most it pays for all claims in the policy year. Larger commercial jobs can ask for more, often through an umbrella policy, so read the insurance exhibit before you bid. For more on the liability policy itself, see general liability insurance coverage for contractors.

That last row trips people up most. These aren't separate policies. They're endorsements, meaning written changes added to your policy, and the sections below explain why they matter so much.

Who pays when a sub's worker gets hurt and the sub has no comp?

In many states, workers' comp law makes the GC the backstop. Say a sub's employee falls off a ladder and the sub never bought comp. The claim can climb the chain to the GC. Lawyers call the GC the "statutory employer" here: the law treats it as the employer for comp purposes even though it never hired the worker. The rules vary by state, and three of them show how.

Florida

Florida's statute is blunt. When a contractor sublets part of its work, all the employees of the contractor and its subs on that work are treated as employed in one business. The contractor is liable for comp for all of them, except employees of a sub who has secured its own coverage (Florida Statutes s. 440.10). The same section says a contractor shall require a subcontractor to provide evidence of workers' comp. The state's workers' compensation system guide adds that an out-of-state sub working in Florida needs proof of a Florida policy or an endorsement to its out-of-state policy that lists Florida in Section 3.A. The guide also names misclassifying employees to lower premiums, and treating employees as subcontractors, among the problems the state watches for.

North Carolina

A North Carolina law firm explains that a GC that gets a valid certificate from the sub before work begins isn't treated as the statutory employer. If the sub is uninsured, the injured worker can go up the chain to the first insured party (Teague Campbell). The firm also advises getting an updated certificate before the sub's policy expires, which matters on long builds.

California

California ties comp to the license. Certain classifications, including C-8 concrete, C-20 HVAC, C-22 asbestos abatement, C-39 roofing and D-49 tree service, must carry comp even with no employees. A requirement for every licensee was pushed from January 1, 2026 to January 1, 2028 by SB 1455 (TSM Insurance). Check your classification's status with the CSLB, and see CA contractors insurance requirements for the job-by-job picture.

There's a money side even when nobody gets hurt. Your comp insurer audits your payroll after the policy year, and Contractors Insured describes GCs who skipped a sub's certificate and then got an audit bill for thousands of dollars. You'll find more on what GCs owe in general contractor workers compensation insurance.

Why a certificate alone doesn't protect the GC

A certificate of insurance (usually the one-page ACORD 25 form) is a snapshot. It shows the sub had certain policies on the day it was printed, nothing more. One law firm calls it "nothing more than evidence of insurance" and explains that being listed as certificate holder doesn't make you an additional insured (Reuben, Junius & Rose). Additional insured status comes from an endorsement. That's either a "scheduled" one that names you or a "blanket" one that covers anyone the sub's contract requires.

A construction insurance compliance guide lists three endorsements for every subcontract. The first is additional insured status for both ongoing operations (form CG 20 10, while the sub is on site) and completed operations (CG 20 37, after the work is finished). The second is primary and non-contributory wording, so the sub's policy pays first and doesn't ask the GC's policy to chip in. The third is a waiver of subrogation on both general liability and workers' comp, which keeps the sub's insurer from suing the GC to get its money back. Each is a separate endorsement document, and checkboxes on a certificate don't prove any of them exist.

Completed operations coverage is the one GCs forget. A leaky shower pan or a sagging deck ledger rarely shows up while the crew is still around. It shows up months later, after final payment.

Before a sub's first day on site, collect these and check them against the subcontract:

• Certificate. The named insured matches the company on your subcontract, the limits meet the contract, and the policy dates cover the whole job.
• Additional insured endorsements. The actual pages, covering both ongoing and completed operations, not just a checked box.
• Primary and non-contributory wording. On the endorsement or policy form itself.
• Waiver of subrogation. For both the liability and workers' comp policies, if your contract calls for it.
• Workers' comp proof. A current comp policy, or the state's exemption paperwork where your state allows one.

Then put every expiration date on a calendar the day you file the paperwork, so a renewal doesn't slip past you in the middle of a job.

What happens when a sub's policy lapses mid-job

Policies get canceled for nonpayment, and subs switch carriers. A certificate you collected in March tells you nothing about August. As the North Carolina guidance above points out, you want an updated certificate before the old policy runs out.

The cleanest fix is in the subcontract. Make current proof of coverage a condition of each progress payment, and give yourself the right to stop work or hold back payment if coverage lapses. If you're the sub, expect this. Pay your premiums on time, and when you renew, send the new certificate and endorsements to every active GC right away so their office doesn't have to chase you.

What sub insurance costs and how to buy it without surprises

Nobody can give you one fair price for subcontractor coverage. Premiums depend on your trade (a roofer and a finish painter sit in very different risk classes), your payroll and revenue, where you work, the limits your GCs demand and your claims history. Workers' comp is generally priced on payroll by job classification, and the final bill can change after the audit. Endorsements like blanket additional insured or waiver of subrogation come included in some contractor policies and cost extra on others.

If you're the sub, get the insurance exhibit from your main GCs before you shop and hand it to the agent. A cheaper policy without the right endorsements can fail a GC's review, and you'll find out just as you're trying to start a job. Line up coverage before you bid, not after you win.

Questions worth asking a licensed agent:

• Does my general liability policy include blanket additional insured status for both ongoing and completed operations when a written contract requires it?
• Can you add primary and non-contributory wording and a waiver of subrogation, and is there a charge for each?
• Does the policy exclude any type of work I do, or any type of project, such as residential, multifamily or work at height?
• How quickly can you issue a certificate plus copies of the endorsements when a new GC asks?
• If I hire my own subs, how will the comp and liability audits treat what I pay them?

If you're the GC, ask your own agent what happens to your premium and your claims record when a sub's coverage fails. The answer tells you how strict your certificate process needs to be. When state rules aren't clear, your state's workers' comp agency or contractor licensing board has the final word.