Using an uninsured subcontractor is one of the most financially dangerous decisions a roofing contractor can make. The consequences hit from multiple directions: premium audit surcharges, direct liability for the sub's injuries and damages, policy cancellation, and potential loss of your contractor's license. Every one of these consequences is well-documented in the roofing industry, and yet contractors continue to use uninsured subs — usually because of cost pressure or schedule urgency. Understanding the full scope of risk should eliminate any temptation to cut this corner.
Premium Audit Surcharges
Your insurance carrier audits your policy annually. During the audit, they review every subcontractor you used and request certificates of insurance for each one. For any subcontractor who cannot produce a valid certificate covering the period they worked for you, the auditor adds their labor cost to your policy as uninsured subcontractor payroll. This payroll is then rated at your roofing classification — typically NCCI code 5551, one of the highest-rated classes in construction.
The math is punishing. NCCI 5551 base rates range from $15 to $45 per $100 of payroll depending on your state. If you used an uninsured sub crew with $120,000 in labor cost, and your state's 5551 rate is $28 per $100, the audit adds $33,600 to your workers comp premium. Use three uninsured crews over the course of a year and you could face a six-figure audit bill. These surcharges are due immediately and are not negotiable — the carrier has the contractual right to collect them under the audit provision of your policy.
Direct Liability for Injuries
In most states, the general or principal contractor bears statutory responsibility for providing workers compensation benefits to uninsured subcontractor employees. This is not a gray area — it is codified in state law. If your uninsured sub's employee falls off a roof and suffers a spinal cord injury, you are legally obligated to provide their medical treatment, wage replacement, and disability benefits. Your workers comp carrier will pay the claim and then charge it against your experience modification rate (EMR), increasing your premiums for three to five years.
A single serious fall claim can cost $300,000 to $1,000,000 or more in medical and indemnity payments. That claim goes on your loss history, pushes your EMR above 1.0 (potentially above 1.4), and can result in your current carrier non-renewing your policy. The replacement coverage in the surplus lines market will cost 40% to 80% more than your current program. The total cost of one uninsured sub injury — between the claim payout, EMR impact, and increased premiums — can exceed $500,000 over five years.
General Liability Exposure
If your uninsured sub's work causes property damage or third-party bodily injury, there is no sub policy to respond. The claim comes directly to your GL policy. If the sub installs a roof section that leaks and causes $200,000 in interior damage to the building, your completed operations coverage pays the claim — even though you did not perform the work. Your loss history takes the hit, and your GL renewal premium increases accordingly.
Policy Cancellation and Non-Renewal
Most commercial insurance carriers include a policy condition requiring you to obtain certificates of insurance from all subcontractors. Using uninsured subs violates this condition. Carriers can cancel your policy mid-term for material misrepresentation if you certified during the application process that you verify sub insurance and then failed to do so. At minimum, the carrier will non-renew your policy at the next renewal — leaving you to find replacement coverage in a restricted market at significantly higher premiums.
Licensing and Legal Consequences
Many states tie contractor licensing to insurance compliance. Using uninsured subcontractors can be reported to the state licensing board, resulting in fines, license suspension, or revocation. OSHA can also cite you for safety violations committed by your uninsured sub's employees on your jobsite, with penalties of $16,131 per serious violation and $161,323 per willful violation as of 2024.
The Bottom Line
There is no scenario where using an uninsured subcontractor saves you money. The audit surcharges alone will exceed whatever discount the uninsured sub offered. Add the liability exposure, EMR impact, and potential policy cancellation, and the true cost is catastrophic. Verify certificates before every sub starts work. No exceptions.