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📊 '''Claims ratio''' — also known as the [[Definition:Loss ratio (L/R) | loss ratio]] — expresses the proportion of [[Definition:Earned premium | earned premiums]] that an [[Definition:Insurance carrier | insurer]] pays out in [[Definition:Insurance claim | claims]] and [[Definition:Loss adjustment expense | loss adjustment expenses]] over a given period. Stated as a percentage, it is one of the most fundamental performance metrics in the insurance industry: a claims ratio of 65 % means that for every dollar of premium earned, sixty-five cents went toward claims.

🔢 The calculation is straightforward in concept — [[Definition:Incurred losses | incurred losses]] divided by earned premiums — but the inputs demand careful definition. Incurred losses include paid claims plus the change in [[Definition:Loss reserves | outstanding reserves]], including estimates for [[Definition:Incurred but not reported (IBNR) | IBNR]] claims. This means the ratio can shift significantly as reserves develop, especially in [[Definition:Long-tail insurance | long-tail]] lines like [[Definition:Professional liability insurance | professional liability]] or [[Definition:Workers' compensation insurance | workers' compensation]]. Insurers and analysts track both the gross claims ratio (before [[Definition:Reinsurance | reinsurance]] recoveries) and the net ratio (after recoveries), and they often segment the metric by line of business, geography, or [[Definition:Underwriting year | underwriting year]] to surface granular performance trends.

📉 The claims ratio serves as an early-warning system for [[Definition:Underwriting | underwriting]] discipline. A rising ratio over successive quarters may indicate that [[Definition:Pricing model | pricing]] is too soft, that [[Definition:Claims inflation | claims inflation]] is outpacing assumptions, or that the mix of business has shifted toward riskier segments. When combined with the [[Definition:Expense ratio | expense ratio]], it produces the [[Definition:Combined ratio | combined ratio]], the industry's headline measure of underwriting profitability. Investors, [[Definition:Rating agency | rating agencies]], and regulators all monitor the claims ratio closely, making it indispensable for anyone evaluating an insurer's financial trajectory.

'''Related concepts'''
{{Div col|colwidth=20em}}
* [[Definition:Loss ratio (L/R)]]
* [[Definition:Combined ratio]]
* [[Definition:Expense ratio]]
* [[Definition:Incurred losses]]
* [[Definition:Earned premium]]
* [[Definition:Claims inflation]]
{{Div col end}}

Definition:Claims ratio - Revision history

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