Every claim you file creates a ripple effect that extends far beyond the immediate payout. For roofing contractors, where base rates are already among the highest in construction, the premium consequences of claims can be devastating. Understanding exactly how claims translate to future costs helps you make informed decisions about claim reporting, safety investments, and risk retention.
Workers Compensation: The EMR Multiplier
Workers comp claims affect your premiums through your experience modification rate (EMR) for three full years after the policy period in which the claim occurred. The NCCI formula weighs each claim based on its primary loss component (the first $5,000 to $18,500 depending on your state) and its excess loss component (everything above that threshold). Primary losses carry four to five times more weight than excess losses in the formula because they reflect claim frequency.
A single $50,000 workers comp claim for a roofing contractor with $800,000 in payroll can increase the EMR by 0.15 to 0.25 points. At a base rate of $25 per $100 of payroll, that translates to $30,000 to $50,000 in additional annual workers comp premium — multiplied across three years, the total premium impact reaches $90,000 to $150,000. A single fall-from-height claim can easily cost more in premium increases than the claim itself.
General Liability: Loss Ratios and Carrier Pricing
GL premiums are affected by your individual loss history and the carrier's overall experience with roofing accounts. Most carriers evaluate your loss ratio — claims paid divided by premiums earned — over the most recent three to five years. A loss ratio above 50% triggers underwriting concern. Above 60% typically triggers non-renewal consideration. Above 70% results in non-renewal or aggressive rate increases of 25% to 50%.
For a roofing contractor paying $15,000 annually in GL premium, a single $25,000 property damage claim creates a loss ratio of 167% for that year. Averaged over three years, the loss ratio is 56% — enough to trigger a renewal increase of 15% to 25%. Two claims of similar size push the three-year loss ratio above 100%, virtually guaranteeing non-renewal.
The Non-Renewal Penalty
When a carrier non-renews your policy due to claims, the replacement cost is almost always higher. Standard market carriers decline accounts with recent losses, pushing you to surplus lines (excess and surplus, or E&S) markets. E&S premiums run 30% to 75% higher than standard market rates for equivalent coverage. A roofer paying $15,000 for GL in the standard market can expect $22,000 to $26,000 from an E&S carrier. On workers comp, the increase is even steeper — 40% to 100% higher premiums are common after a non-renewal for losses.
Non-renewal also creates a three-year underwriting scar. Even after your claims age off, carriers will see the non-renewal on your loss runs and CLUE reports and price accordingly. Returning to standard market pricing after a non-renewal typically takes two to three clean years.
Claim Frequency vs. Severity
Insurance carriers fear frequency more than severity. Three $10,000 claims alarm underwriters far more than one $30,000 claim because frequency suggests systemic operational problems — inadequate safety training, poor supervision, or risky work practices. A single large claim can be attributed to bad luck. Multiple claims indicate a pattern that will likely continue.
This has practical implications for your claim-reporting strategy. For minor incidents — a $500 windshield crack, a $1,200 property damage payment — consider whether self-insuring the loss (paying out of pocket) is cheaper than the three-year premium impact of filing the claim. A $1,200 GL claim that triggers a 10% rate increase on a $15,000 policy costs you $1,500 per year for three years — $4,500 total. Paying the $1,200 yourself saves $3,300.
How Claims Appear on Your Record
Claims are tracked on your loss runs, which every carrier requests during the underwriting process. Loss runs show five years of claims history including dates, descriptions, amounts paid, and amounts held in reserve (money the carrier expects to pay in the future). Open claims with high reserves are particularly damaging because they signal ongoing exposure. Even claims where no payment was made ($0 paid) appear on loss runs and count as a claim occurrence — closed without payment is better than an open claim, but it still demonstrates incident frequency.
Mitigating Claim Impact
Report claims promptly to accelerate closure — open claims with lingering reserves hurt you more than closed claims. Work with your carrier to manage medical treatment costs on workers comp claims. Implement return-to-work programs to reduce lost-time claims (which carry heavier EMR penalties than medical-only claims). Challenge reserve amounts that appear excessive — your broker can request reserve reviews if the amounts seem inflated relative to the injury severity. And invest in the safety programs and training that prevent claims from occurring in the first place.