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📈 '''Claims inflation''' describes the tendency for the cost of settling [[Definition:Insurance claim | insurance claims]] to rise over time, driven by factors that range from general economic inflation to legal and social dynamics unique to the insurance industry. While headline consumer price inflation plays a role — particularly in lines like [[Definition:Property insurance | property insurance]], where rebuilding costs track material and labor prices — claims inflation often outpaces it. This divergence is especially pronounced in [[Definition:Liability insurance | liability]] and [[Definition:Motor insurance | motor]] lines, where medical cost trends, litigation funding, and shifting jury attitudes push settlement values higher.

⚙️ Actuaries decompose claims inflation into several components when pricing policies and setting [[Definition:Loss reserves | reserves]]. Economic or "cost" inflation captures the rising price of goods and services needed to make a claimant whole — replacement parts, medical procedures, construction materials. Superimposed inflation, sometimes called [[Definition:Social inflation | social inflation]], reflects changes in legal environments, claimant behavior, and societal expectations that amplify claim values beyond what pure cost increases would predict. A practical example: [[Definition:Nuclear verdict | nuclear verdicts]] in U.S. courts have driven superimposed inflation in [[Definition:Commercial general liability (CGL) | commercial general liability]] lines well above what economic indicators alone would suggest.

⚠️ Underestimating claims inflation is one of the most common causes of [[Definition:Reserve deficiency | reserve deficiency]] and [[Definition:Underpricing | underpricing]] in the industry. If an insurer assumes three-percent annual claims inflation but actual trends run at seven percent, the resulting shortfall compounds year after year, eroding [[Definition:Underwriting profit | underwriting profitability]] and potentially threatening solvency. [[Definition:Reinsurance | Reinsurers]] are equally exposed, particularly on long-tail [[Definition:Treaty reinsurance | treaty]] business where claims settle years after the policy was written. Robust inflation assumptions, regularly stress-tested against emerging data, are therefore a cornerstone of sound [[Definition:Reserving | reserving]] and [[Definition:Pricing model | pricing]] practice.

'''Related concepts'''
{{Div col|colwidth=20em}}
* [[Definition:Social inflation]]
* [[Definition:Loss reserves]]
* [[Definition:Reserve deficiency]]
* [[Definition:Nuclear verdict]]
* [[Definition:Actuarial analysis]]
* [[Definition:Claims reserving]]
{{Div col end}}

Definition:Claims inflation - Revision history

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