Loss Ratio
The percentage of premium consumed by claims, calculated as incurred losses divided by earned premium.
What It Is
Loss ratio is the fundamental measure of underwriting profitability, calculated by dividing incurred losses (paid claims plus outstanding reserves) by earned premium over the same period. A loss ratio of 60% means that for every dollar of premium earned, sixty cents was spent on claims. The remaining forty cents covers the carrier's operating expenses, commissions, and profit.
Loss ratios are evaluated at multiple levels: individual account, book of business, line of business, and carrier-wide. For individual accounts, underwriters typically look at the five-year loss ratio to smooth out year-to-year volatility. For commercial lines, a loss ratio below 40% is generally considered excellent, 40-60% is acceptable, and above 60% may trigger pricing increases or non-renewal.
There are several variations of loss ratio that brokers encounter. The pure loss ratio uses only paid losses. The incurred loss ratio includes reserves. The ultimate loss ratio projects total expected losses including IBNR. The developed loss ratio applies development factors to immature claim years. Each variation serves a different analytical purpose, and brokers should understand which version a carrier is using when discussing account profitability.
Why It Matters for Brokers
Loss ratio is the language of underwriting. When a carrier non-renews an account or proposes a 25% rate increase, the loss ratio is almost always the basis for that decision. Brokers who understand loss ratio analysis can anticipate underwriting actions, prepare counter-arguments using developed loss ratios and large-loss adjustments, and negotiate more effectively on behalf of clients.
Real-World Example
A contractor's GL program has a 72% loss ratio over five years: $540,000 in incurred losses against $750,000 in earned premium. The carrier proposes a 30% rate increase at renewal. The broker analyzes the losses and identifies that $280,000 stems from a single completed-operations claim now closed. Excluding that large loss, the adjusted loss ratio is 35%. The broker presents this analysis to the underwriter and negotiates the increase down to 8%, saving the client $16,500 annually.
Common Mistakes
- 1Using paid loss ratio instead of incurred loss ratio when open claims with significant reserves make the paid ratio artificially low.
- 2Not adjusting the loss ratio for large one-time losses that distort the account's underlying loss experience.
- 3Comparing loss ratios across different lines of business when acceptable loss ratios vary significantly by line.
How brokerageaudit.com Handles This
brokerageaudit.com automatically calculates loss ratios from uploaded loss runs and policy data, presenting both raw and large-loss-adjusted ratios. The system generates loss ratio trend charts that brokers can use in renewal presentations, and flags accounts where deteriorating loss ratios may trigger adverse underwriting action before the carrier communicates its position.