If one of your subcontractor's employees gets injured on your jobsite and that sub doesn't have active workers' compensation insurance, guess who's on the hook? You are.
In most states, when a subcontractor fails to carry workers' comp, the liability flows uphill to the general contractor. You become the "statutory employer" of that sub's workers — responsible for their medical bills, lost wages, and rehabilitation costs.
This isn't an edge case. It's one of the most common and expensive compliance failures in construction. And it's entirely preventable.
How Workers' Comp Works in Construction
Workers' compensation is a no-fault insurance system. When an employee is injured on the job, workers' comp covers their medical expenses and a portion of lost wages, regardless of who caused the injury. In exchange, the employee generally can't sue their employer for the injury.
For construction, the system is layered:
- Each employer carries their own policy. Your company has its own workers' comp. Each subcontractor has theirs.
- Coverage follows the employer, not the jobsite. A sub's policy covers their employees wherever they work.
- The GC is the backstop. If a sub doesn't have coverage, the GC's policy — or the GC directly — picks up the liability.
This backstop rule exists to protect workers. The law assumes that the GC, as the party controlling the jobsite, has ultimate responsibility for ensuring everyone working there is covered.
State-by-State Variations
Workers' comp requirements vary significantly by state. Key differences include:
Mandatory vs. elective coverage:
- Most states require all employers to carry workers' comp
- Texas allows employers to opt out (but GCs should never accept an uninsured sub)
- Some states exempt sole proprietors or businesses below a certain employee count
Coverage thresholds:
- Many states require coverage starting at one employee
- Others set the threshold at three, four, or five employees
- Construction is often treated differently — some states require coverage for all construction workers regardless of company size
Penalties for non-compliance:
- Fines ranging from $1,000 to $100,000+
- Criminal charges in some states
- Stop-work orders
- Personal liability for company officers
GC liability rules:
- In California, the GC is liable for any uninsured sub's workers' comp claims — period
- In New York, a GC can be liable even if the sub had coverage at the time of hire, if it lapsed before the injury
- Some states allow GCs to shift liability contractually, but many don't
The specifics matter. Know the rules in every state where you operate.
What Happens When a Sub's Coverage Lapses
Here's a timeline of how this typically goes wrong:
- Project start: Sub provides a valid certificate of insurance showing active workers' comp
- Three months in: Sub's policy renewal comes due. Premiums are high. Sub decides to let it lapse "temporarily."
- Four months in: Sub's employee falls from scaffolding. Serious injury. Ambulance, hospital, surgery.
- The claim: The injured worker files a workers' comp claim. Sub's carrier denies it — policy was inactive at the time of injury.
- The cascade: The claim flows to the GC. Your insurance carrier investigates, finds the sub was uninsured, and either covers the claim (spiking your premiums) or denies it (leaving you personally liable).
- The aftermath: Medical costs: $150,000+. Lost wages: $40,000+. Your EMR increases. Your insurance premiums jump 20-30%. You may face state penalties for allowing an uninsured sub on site.
Total exposure from a single incident with an uninsured sub: easily $200,000-$500,000+.
How to Protect Yourself
Verify at Hire
Before any subcontractor begins work:
- Request a certificate of insurance showing active workers' comp coverage
- Verify the policy is active by calling the carrier directly (not the broker)
- Confirm the policy covers the state where work will be performed
- Check that the named insured matches the legal entity on your subcontract
- Ensure your company is listed for certificate holder notifications
Track Expirations
A COI verified on day one can expire on day thirty. You need a system that:
- Records every policy expiration date
- Sends alerts 30 days before expiration
- Flags subs whose coverage has lapsed
- Blocks work authorization for uninsured subs
This is where most GCs fail. The initial verification happens, but nobody tracks the ongoing validity.
Contract Protection
Your subcontract should include:
- Insurance requirements specifying minimum workers' comp coverage
- Indemnification clause requiring the sub to hold you harmless for claims arising from their employees
- Right to verify — your right to request proof of insurance at any time
- Right to withhold payment if insurance requirements aren't met
- Right to terminate if coverage lapses and isn't reinstated within a specified period
These clauses don't replace verification — a contract right doesn't help if you didn't exercise it — but they provide legal protection and set clear expectations.
Know Your State Rules
Understand the specific workers' comp rules in your operating states:
- Who qualifies for exemption (if anyone)?
- What are the GC liability rules?
- Can you require subs to add you as an alternate employer?
- What happens if a sub's sole proprietor is injured?
Consult with your insurance broker and attorney to understand your specific exposure.
The EMR Connection
Your Experience Modification Rate directly reflects your workers' comp claims history. When an uninsured sub's claim hits your policy, it affects your EMR for three years.
An EMR increase from 1.0 to 1.2 means your workers' comp premiums increase by 20%. For a GC paying $200,000/year in workers' comp premiums, that's an extra $40,000/year — for three years. A single uninsured sub incident can cost you $120,000 in premium increases alone.
Many project owners set EMR requirements for their GCs. An EMR above 1.0 can disqualify you from bidding. Your subcontractors' compliance directly affects your ability to win work.
Sole Proprietors and 1099 Workers
Special attention is needed for:
Sole proprietors: In many states, sole proprietors can exempt themselves from workers' comp. But if they get injured on your site, your policy may still cover them — depending on whether they're classified as a sub or an employee under state law.
1099 workers: Misclassification is a major risk. If a "1099 subcontractor" is actually an employee by legal definition, you may be liable for their workers' comp coverage. The IRS and state agencies look at the actual working relationship, not just the tax form.
Best practice: Require all subs to carry workers' comp, regardless of exemption status. If they're exempt, ask them to voluntarily carry coverage or add them to your policy (and charge them for it). The cost is small compared to the risk.
Frequently Asked Questions
Can a subcontractor waive their right to workers' comp benefits? No. Workers' comp benefits cannot be waived by contract. Even if a sub signs a waiver, it's unenforceable. The worker always retains the right to file a claim.
What if a sub provides a certificate of insurance but the policy is fake? You may still be liable for the claim, but you'll have a fraud claim against the sub and potentially their broker. This is why direct carrier verification matters — it's the only way to catch fraudulent certificates.
Does my CGL policy cover workers' comp claims from uninsured subs? Generally no. Commercial general liability and workers' compensation are separate coverages. Your CGL typically excludes workers' comp claims. You need actual workers' comp coverage — either the sub's or yours.
How often should I re-verify a sub's workers' comp coverage? At minimum: at project start, at every policy renewal date, and randomly throughout the project. Continuous monitoring is the gold standard.