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📋 '''Risk period''' refers to the specific span of time during which an [[Definition:Insurance policy|insurance policy]] or [[Definition:Reinsurance|reinsurance]] contract provides coverage for [[Definition:Loss|losses]] arising from insured events. It defines the temporal boundaries within which an occurrence or claim must fall in order to trigger the insurer's obligation to indemnify the [[Definition:Policyholder|policyholder]] or [[Definition:Cedent|cedent]]. While the concept may sound straightforward, its precise application varies considerably depending on whether the contract is written on an [[Definition:Occurrence basis|occurrence basis]], a [[Definition:Claims-made basis|claims-made basis]], or a [[Definition:Losses-occurring basis|losses-occurring basis]], and these distinctions carry significant implications for [[Definition:Reserving|reserving]], [[Definition:Premium|premium]] allocation, and [[Definition:Reinsurance recovery|reinsurance recovery]].

🔎 In practice, the risk period determines when coverage attaches and expires, which directly affects how [[Definition:Underwriter|underwriters]] structure contracts and how [[Definition:Actuary|actuaries]] estimate [[Definition:Loss reserves|reserves]]. For a standard annual [[Definition:Property insurance|property insurance]] policy, the risk period typically aligns with the policy term — say, twelve months from inception — meaning only losses caused by events occurring within that window are covered. In reinsurance, however, the mechanics can be more nuanced: a [[Definition:Treaty reinsurance|treaty]] on a losses-occurring basis covers events happening during the treaty's risk period regardless of when the underlying policies were written, whereas a [[Definition:Risks-attaching basis|risks-attaching basis]] covers all policies incepting during the treaty period, even if losses emerge long after the treaty has expired. Under [[Definition:IFRS 17|IFRS 17]], the risk period is central to determining the [[Definition:Coverage period|coverage period]] over which the [[Definition:Contractual service margin|contractual service margin]] is released, making its precise identification a matter of accounting consequence as well.

💡 Getting the risk period right matters enormously because misalignment between the coverage window and the timing of losses can leave [[Definition:Insured|insureds]] exposed or create disputes between [[Definition:Cedent|cedents]] and [[Definition:Reinsurer|reinsurers]] over which contract responds to a given event. Long-tail lines such as [[Definition:Liability insurance|liability]] and [[Definition:Professional indemnity insurance|professional indemnity]] are particularly susceptible to complexity, since the harmful event, the manifestation of injury, and the filing of a claim may each occur in different policy years. Regulators and auditors in jurisdictions from the United States to the European Union to Singapore scrutinize how insurers define and apply risk periods because the treatment directly influences [[Definition:Earned premium|earned premium]] recognition, [[Definition:Unearned premium reserve|unearned premium reserves]], and the timing of [[Definition:Profit|profit]] emergence. A clear, well-documented risk period definition is therefore foundational to sound [[Definition:Underwriting|underwriting]], accurate financial reporting, and effective [[Definition:Reinsurance program|reinsurance program]] design.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Coverage period]]
* [[Definition:Occurrence basis]]
* [[Definition:Claims-made basis]]
* [[Definition:Risks-attaching basis]]
* [[Definition:Earned premium]]
* [[Definition:IFRS 17]]
{{Div col end}}

Definition:Risk period - Revision history

PlumBot: Bot: Creating definition