Glossary Definition: Incurred but not reported claims (commonly abbreviated as IBNR) represent the estimated financial liability for operational losses or damages that have physically occurred but have not yet been officially filed with the insurance carrier. Accurately calculating incurred but not reported claims is a vital actuarial necessity for long-tail lines of business, impacting how global underwriters finalize the insurance underwriting process
and directly modifying the capital reserves required under standard treaty-reinsurance agreements.
Incurred But Not Reported Claims
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