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📋 '''Occurrence''' is a foundational concept in insurance contract law that denotes an event, or series of related events, that gives rise to one or more [[Definition:Claim | claims]] under an [[Definition:Insurance policy | insurance policy]]. Most [[Definition:Commercial general liability (CGL) | commercial general liability]] and [[Definition:Property insurance | property insurance]] contracts are written on an occurrence basis, meaning coverage is triggered by when the loss-causing event takes place, regardless of when the [[Definition:Claim | claim]] is actually reported. This stands in contrast to [[Definition:Claims-made policy | claims-made]] forms, where the reporting date controls coverage. The way an occurrence is defined and counted can determine whether one [[Definition:Policy limit | policy limit]] or multiple limits apply, making it one of the most frequently litigated issues in insurance disputes.

🔍 Determining what constitutes a single occurrence versus multiple occurrences depends on the specific policy language, the jurisdiction, and the causal analysis applied. Courts commonly use tests such as the "cause" test (focusing on the originating act) or the "effect" test (focusing on the number of injuries or damaged properties). In practice, a hurricane damaging hundreds of homes may be treated as one occurrence under a [[Definition:Reinsurance | reinsurance]] treaty, collapsing all losses into a single retention and recovery. Conversely, a manufacturer's defective product injuring many consumers over months could be argued as multiple occurrences, each subject to its own [[Definition:Deductible | deductible]] and limit. [[Definition:Underwriting | Underwriters]] draft occurrence definitions carefully, and [[Definition:Claims adjuster | claims teams]] apply them during the adjustment process to allocate losses accurately.

⚖️ How an occurrence is classified ripples through the entire insurance value chain — from [[Definition:Premium | premium]] calculation to [[Definition:Reinsurance recovery | reinsurance recovery]]. A single-occurrence characterization may cap the [[Definition:Insured | insured's]] recovery at one policy limit but also limit the [[Definition:Deductible | deductible]] to a single application, while a multiple-occurrence reading can unlock additional limits at the cost of additional retentions. For [[Definition:Reinsurer | reinsurers]], the number of occurrences in a catastrophic event determines how [[Definition:Excess-of-loss reinsurance | excess-of-loss]] layers attach. Given these stakes, insurers invest heavily in clear policy drafting and in [[Definition:Actuarial analysis | actuarial models]] that simulate different aggregation scenarios to ensure their [[Definition:Reserve | reserves]] and capital positions remain adequate.

'''Related concepts'''
{{Div col|colwidth=20em}}
* [[Definition:Claims-made policy]]
* [[Definition:Policy limit]]
* [[Definition:Aggregation clause]]
* [[Definition:Excess-of-loss reinsurance]]
* [[Definition:Commercial general liability (CGL)]]
* [[Definition:Deductible]]
{{Div col end}}

Definition:Occurrence - Revision history

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