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Subcontractor with no insurance? That's your claim now.
The honest answer is that an uninsured subcontractor doesn’t carry his own risk. He hands it to whoever hired him, and on most jobs that’s you. His laborer breaks an ankle in your trench, his mini excavator finds the gas service, his pickup backs into the homeowner’s car, and the claim looks around for a policy. The only one it finds is yours. That’s not a loophole. It’s how the system is built, and Colorado’s workers’ compensation rules are the sharpest version of it. Here’s what actually happens when the sub has nothing, the certificate you have to collect before he unloads, and the bill that shows up at audit even when nobody gets hurt.
Why the claim comes to you
Two things are going on at once, and they’re worth keeping separate.
The lawsuit. When something goes wrong on a job, the injured party’s attorney names everyone whose name is on a contract: the owner, the GC, you, and the sub. Your general liability policy typically defends you and pays what you owe. Then your carrier looks to the sub’s carrier to pick up his share. If he has no carrier, there is nobody to look to. Your policy stays the only one in the room, your loss runs take the hit, and your renewal reflects it.
The comp system. This is the Colorado-specific part. The state requires comp at the first employee, and it doesn’t stop at the edge of your own payroll.
Colorado employers must carry workers' compensation insurance as soon as they have one or more employees, whether part-time, full-time, or family members (C.R.S. 8-40-203(1)(b), 8-44-101); the state can fine an uninsured employer up to $500 for every day without coverage. (C.R.S. 8-40-203(1)(b); 8-44-101; 8-43-409)Colorado’s comp law also carries a concept, commonly called the statutory employer rule, that reaches past the sub. In plain English: when you contract out part of your work to someone who doesn’t carry comp, and his worker gets hurt doing that work, the law can treat you as that worker’s employer for the injury. The claim lands on your comp policy as if the laborer were yours. If you don’t have comp either, the worker can come at you directly, and the state fine above is on top of that.
We’re not quoting the section, because the details of who counts and when belong to a Colorado construction attorney, not to us. But the direction of it is not in doubt, and every GC exhibit we’ve read assumes it: you are responsible for your subs’ insurance, because if they have none, you’re the insurance.
Whether the person you hired is a subcontractor at all is a separate question, and the statute answers it by how the work is done, not by the 1099. Under C.R.S. 8-40-202(2)(a), anyone who performs services for pay for another is deemed an employee unless the person is free from control and direction in performing the service, both under the contract and in fact, and is customarily engaged in an independent trade, occupation, profession, or business related to the service; a signed written document showing the nine factors in 8-40-202(2)(b)(II), with a conspicuous disclosure that the contractor is not entitled to workers' compensation benefits, creates only a rebuttable presumption of an independent contractor relationship. (C.R.S. 8-40-202(2)(a), (2)(b)(I) to (IV))
The three ways it shows up
The injury. A utility trenching crew in Denver brings on a two-man sub to run the shoring. One of them takes a fall into an open trench in expansive clay on a wet morning. The sub has no comp. Under the rule above, that injury is commonly your comp claim. Your carrier pays the medical and the wage loss, and your experience mod carries it for years.
The property damage. The sub’s mid-size excavator hits a gas line because his locate ticket lapsed. The utility’s repair bill, the neighbor’s evacuation, the emergency response. The gas line article covers who pays in the normal case. In the uninsured case, the answer is your GL, and the presumption of fault attached to a bad ticket travels with the claim.
The truck. His pickup, on your job, backs into a parked car. His personal auto policy has a business-use question and personal limits, if it’s in force at all. Your commercial auto policy’s hired and non-owned coverage is the next stop, and the commercial auto article explains why that coverage exists. If you don’t carry it, the homeowner’s attorney knows your address.
Then there’s the theft off your lot: his machine, his equipment policy, if he has one. If he doesn’t, he’s asking you.
The certificate you have to collect
Here’s what we tell every contractor who asks. Before a sub sets foot on your job, you have a certificate of insurance in hand that shows:
| Line | What to look for | Why |
|---|---|---|
| General liability | Limits at least matching your own contract with the GC, commonly $1,000,000 per occurrence and $2,000,000 aggregate | If his limits are lower than yours, the gap is yours |
| Additional insured | Your business named on his GL, for ongoing and completed operations | So his policy defends you for his work, not just him |
| Commercial auto | Owned, hired, and non-owned, at a combined single limit | His pickup on your job is your problem otherwise |
| Workers’ compensation | Coverage in force, with a waiver of subrogation in your favor | So the injury is his claim and his carrier can’t come back at you |
| Dates | Policy period covering the whole job, not just the start | Expiring mid-job is the common miss |
| Certificate holder | Your business, at your address | So you get the cancellation notice |
Two of those rows do real work and get skipped the most. Additional insured is not the same as being the certificate holder, and the additional insured article has the two-paragraph version. Being the holder means you get a piece of paper. Being an additional insured means his policy defends you. Ask for the endorsement, not just the box on the certificate. Waiver of subrogation on the comp means that after his carrier pays his injured worker, it agrees not to turn around and sue you for it. Most GC exhibits require you to get one from your subs because they require one from you.
The GC requirements article walks through the exhibit line by line. The short version: whatever the GC makes you carry, you make your subs carry. Same limits, same endorsements. If a sub’s certificate is thinner than your contract, the difference is your exposure.
And check the dates. A certificate that was valid in March is a piece of paper in July. Our certificates page explains what a holder is entitled to and what a cancellation notice does.
The audit charge nobody expects
Here’s the part that costs money even on a job where nothing goes wrong.
At the end of the policy year, your workers’ comp carrier audits your payroll. The auditor asks for the certificates for every sub you paid. For every sub without a valid comp certificate covering the dates you paid him, the carrier commonly treats what you paid him as your payroll and charges premium on it, at your class rate, sometimes at the highest-rated class on the policy because the auditor has no way to split it.
Paid a two-man excavation sub $60,000 over the year with no certificate on file? That $60,000 can show up as excavation payroll on your audit, with the premium to match. The audit article covers what the auditor asks for and how to keep the file. GL audits work the same way on the cost-of-subs line: insured subs get rated one way, uninsured subs get rated as if you did the work.
This is why the certificate matters on the day nobody gets hurt. A folder of current certificates, one per sub, one per policy year, is the difference between an audit that takes an afternoon and one that comes with a bill.
What to do when the sub can’t get insured
It happens. A good operator with a bad loss history, a one-man outfit that never bothered, a hauler between carriers. You have three real options.
- Don’t use him until he’s insured. Send him to us, or to anyone. The one-employee article covers the comp side for a small outfit.
- Bring his people onto your policy for the job. Some carriers let you treat his crew as your employees for the duration, and you pay premium on their wages. This solves the comp injury. It does nothing for his GL or auto, and his injuries become your loss runs.
- Take the risk knowingly, on a short job, with a written agreement, after your attorney and your agent have both told you what it costs if it goes wrong. We list this because it’s what most contractors do by default without knowing they’re doing it. Doing it on purpose is at least a decision.
What we don’t control
Whether the sub can find coverage. Some can’t, or not fast enough for your schedule. We also don’t control what a GC’s exhibit makes you responsible for, or how a Colorado court reads the statutory employer rule on your particular facts. What we can do is build your own stack: comp on your crew, hired and non-owned on the auto, GL with contractual liability for what the sub agreement makes you owe. That’s the floor under you while the sub sorts himself out.
Where to go from here
If your subs are on handshakes, Get Insured starts with your own stack, so the floor is under you before the next job. If you already carry it and want the sub agreement and the certificate checklist lined up with your GC’s exhibit, send us both and we’ll mark them up. The excavation insurance hub covers how comp, GL, and auto fit together on a job with subs. The septic installer article has the same problem from the other direction: when you’re the sub, and the GC wants your certificate to keep working for years after you’re gone.
Serving businesses located in Colorado. Coverage is determined by the policy language and the carrier.
If my subcontractor has no workers' comp and his laborer gets hurt, who pays?
What certificate do I need from a subcontractor?
Why did my workers' comp audit charge me for a subcontractor?
Can I just add the sub to my policy for the job?
Does my general liability cover damage a subcontractor causes?
Sources
- Colorado Department of Labor and Employment, Division of Workers' Compensation: Insurance coverage for employers (accessed 2026-09-02)
- C.R.S. 8-40-203, Employer (Workers' Compensation Act of Colorado) (accessed 2026-09-02)
- C.R.S. 8-44-101, Insurance requirements (Workers' Compensation Act of Colorado) (accessed 2026-09-02)
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Statutes and numbers on this page last verified September 3, 2026 by a licensed Colorado producer. How we verify.