Pricing & Underwriting
How Are General Liability Premiums Calculated for Contractors?
Contractor GL premiums are built from a base rate per trade class, multiplied by your annual gross receipts or payroll, then adjusted for limits, deductible, loss history, sub-contractor usage, and territory.
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How Carriers Build a Contractor GL Premium
Every contractor GL policy is priced from the same five-step formula. Understanding it puts you in a much stronger position when you receive a quote — or a renewal increase — that does not look right. Learn more about general liability insurance for contractors or scroll down for the details on this question.
Step 1: Classification. Every trade has a specific GL class code (an ISO ‘CGL’ class). Roofing, framing, drywall, HVAC, electrical, painting, demolition — each has its own loss history baked into its base rate. A roofer pays a multiple of what a flooring contractor pays for the same revenue because falls and water-damage claims are vastly more common.
Step 2: Exposure base. Carriers apply the class rate to either your annual gross receipts (most common for trade contractors) or your payroll (more common for general contractors and labor-heavy classes). A $1.2M gross receipts roofer will pay much more than a $300K gross receipts roofer, even though they buy the same $1M / $2M limits.
Step 3: Limits and deductible. Standard limits are $1M per occurrence / $2M aggregate. Bumping to $2M / $4M typically adds 30–60% premium. A higher deductible (say $2,500 or $5,000 instead of $0) can shave 5–15% off the bill. Adding a per-project aggregate, a higher products-completed-operations aggregate, or higher personal-and-advertising-injury limits each carries its own incremental cost.
Step 4: Modifiers and credits. Carriers apply schedule rating credits and debits for things you can control: years in business, claims history, formal safety program, licensed/insured sub-contractors, drug testing, OSHA training, fleet safety, and whether you use written sub-contractor agreements. Credits of 5–25% are common for well-run shops. Debits of the same magnitude are applied to contractors with claims or poor risk management.
Step 5: Sub-cost markup. If you use uninsured or under-insured subs, the carrier will add the cost of those subs back into your exposure base at a separate, often higher, sub-cost rate. This is one of the biggest hidden drivers of contractor GL pricing — using insured subs and collecting their COIs is the single fastest way to lower your premium.
Trade Safe Tip
The two biggest levers on a contractor GL premium are (1) the trade class code you are placed in and (2) how your gross receipts are reported. We have re-classified clients off bad codes and saved them 20–40% on the same coverage. Always have an independent agent audit your classification at renewal.
Why Two Contractors Pay Different Premiums
Same trade, same revenue, two very different premiums — here is what is usually behind the difference.
Carrier Appetite
Each carrier is hungrier for certain trades. A roofer might pay $9,000 with Carrier A and $14,000 with Carrier B for identical coverage because A is actively growing roofing in Ohio.
Loss History
Three years of clean loss runs unlocks better rates and more credits. One open claim, even a small one, can disqualify you from the cheapest markets entirely.
Sub-Contractor Discipline
Contractors who track COIs from every sub and require minimum limits in writing pay materially less than contractors who do not.
Territory
Premiums for the same class can vary 15–30% between Ohio counties based on jury verdicts and theft frequency. Where you work matters.
Why Contractors Trust Trade Safe
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