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📋 '''Liability (insurance)''' refers to a legal obligation to compensate another party for bodily injury, property damage, or financial loss, and it represents one of the foundational risk categories that the insurance industry exists to address. Unlike [[Definition:First-party insurance | first-party coverages]] that protect the insured's own property or person, liability in insurance concerns obligations owed to third parties — making it the backbone of [[Definition:Commercial general liability (CGL) | commercial general liability]], [[Definition:Professional liability insurance | professional liability]], [[Definition:Directors and officers liability insurance (D&O) | directors and officers]], [[Definition:Product liability insurance | product liability]], and numerous other [[Definition:Line of business | lines of business]].

🔄 In practice, a liability arises when one party's actions — or failure to act — cause harm to another, and the law imposes a duty to make the injured party whole. Insurers evaluate this risk through [[Definition:Underwriting | underwriting]], assessing factors such as the nature of the insured's operations, claims history, contractual exposures, and the legal environment in the relevant jurisdiction. Once a [[Definition:Policy | policy]] responds to a covered liability event, the insurer assumes the obligation to defend the insured against [[Definition:Claim | claims]] and to indemnify for damages up to the [[Definition:Policy limit | policy limit]]. This dual obligation — defense and indemnity — distinguishes liability coverage from most other insurance products and drives much of the complexity in [[Definition:Loss reserve | reserving]], since the ultimate cost of a liability claim may not be known for years or even decades, as is the case with [[Definition:Long-tail liability | long-tail]] exposures like asbestos or environmental contamination.

💡 The centrality of liability to the insurance business cannot be overstated. It shapes how [[Definition:Insurance carrier | carriers]] allocate [[Definition:Capital | capital]], how [[Definition:Actuarial science | actuaries]] model uncertain future obligations, and how [[Definition:Reinsurer | reinsurers]] structure [[Definition:Excess of loss reinsurance | excess of loss]] and [[Definition:Quota share reinsurance | quota share]] treaties. Emerging liability risks — from [[Definition:Cyber insurance | cyber incidents]] and [[Definition:Artificial intelligence | artificial intelligence]] decision-making to [[Definition:Climate risk | climate-related litigation]] — continually expand the scope of what the industry must contemplate. Regulatory frameworks such as [[Definition:Risk-based capital (RBC) | risk-based capital]] standards and [[Definition:Solvency II | Solvency II]] explicitly account for the uncertainty inherent in liability portfolios, requiring insurers to hold additional reserves and capital buffers proportional to the volatility and duration of their liability exposures.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Commercial general liability (CGL)]]
* [[Definition:Professional liability insurance]]
* [[Definition:Loss reserve]]
* [[Definition:Long-tail liability]]
* [[Definition:Third-party insurance]]
* [[Definition:Indemnity]]
{{Div col end}}

Definition:Liability (insurance) - Revision history

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