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⚖️ '''Casualty insurance (also liability insurance)''' is the broad category of [[Definition:Insurance | insurance]] that covers an insured party's legal obligation to pay damages to third parties for bodily injury, property damage, or financial loss caused by the insured's actions, products, or negligence. In many markets — particularly the United States — the term "casualty" encompasses lines such as [[Definition:General liability insurance | general liability]], [[Definition:Professional liability insurance | professional liability]], [[Definition:Workers' compensation insurance | workers' compensation]], [[Definition:Automobile liability insurance | automobile liability]], and [[Definition:Product liability insurance | product liability]], while in the United Kingdom and parts of Europe the equivalent umbrella is more commonly called "liability insurance." Regardless of label, the defining characteristic is the same: these policies respond to obligations owed to someone other than the [[Definition:Policyholder | policyholder]], distinguishing them from first-party [[Definition:Property insurance | property]] or [[Definition:Life insurance | life]] coverages.

🔧 Casualty lines operate under a duty-to-defend and duty-to-indemnify framework, meaning the insurer typically both pays defense costs and satisfies covered judgments or settlements up to the [[Definition:Policy limit | policy limit]]. [[Definition:Underwriting | Underwriting]] these risks demands deep expertise in legal environments, court precedent, and regulatory regimes — all of which vary considerably across jurisdictions. A [[Definition:General liability insurance | commercial general liability]] policy written in the United States, for instance, must navigate a litigation landscape far more plaintiff-friendly than that of Japan or Germany, and pricing reflects this. Many casualty lines are [[Definition:Long-tail liability | long-tail]] in nature: claims can be reported and settled years after the policy period ends, creating [[Definition:Reserving | reserving]] complexity that actuaries address through techniques such as [[Definition:Loss development | loss development]] triangles and stochastic projection models. [[Definition:Reinsurance | Reinsurers]] play a critical role in absorbing peak casualty exposures, especially for high-severity lines like [[Definition:Excess liability insurance | excess liability]] and [[Definition:Umbrella insurance | umbrella]] covers.

🌍 The significance of casualty insurance to the global economy is difficult to overstate. Businesses, professionals, and public entities rely on it to operate with confidence, knowing that a single lawsuit or mass tort event will not wipe out their balance sheet. From a market perspective, casualty lines represent a substantial share of global [[Definition:Gross written premium (GWP) | gross written premiums]] and have historically driven some of the [[Definition:Underwriting cycle | underwriting cycle's]] sharpest turns — the U.S. liability crisis of the mid-1980s, for example, triggered coverage shortages and premium spikes that reshaped both primary and reinsurance markets worldwide. Today, emerging exposures like [[Definition:Cyber insurance | cyber liability]], [[Definition:Directors and officers liability insurance (D&O) | D&O claims]] linked to [[Definition:ESG (environmental, social, and governance) | ESG]] failures, and litigation funding trends continue to challenge casualty underwriters, making this one of the most intellectually demanding and consequential branches of the insurance industry.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:General liability insurance]]
* [[Definition:Professional liability insurance]]
* [[Definition:Product liability insurance]]
* [[Definition:Long-tail liability]]
* [[Definition:Underwriting cycle]]
* [[Definition:Property insurance]]
{{Div col end}}

Definition:Casualty insurance (also liability insurance) - Revision history

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