Definition:Per occurrence limit
🛡️ Per occurrence limit is the maximum amount an insurer will pay for all claims arising from a single covered occurrence or event under an insurance policy. It functions as a fundamental cap on the insurer's exposure to any one loss event, regardless of how many individual claimants or damaged properties are involved. The concept is most prevalent in property and casualty lines — including general liability, commercial property, and professional liability — and is a critical structuring element in both primary and excess layers of coverage.
📝 In a typical commercial general liability policy, the per occurrence limit sits alongside an aggregate limit that caps total payouts across all occurrences during the policy period. If a factory explosion injures dozens of workers and damages neighboring properties, all resulting claims from that single event draw against the per occurrence limit. The precise definition of what constitutes a single occurrence is often the most litigated aspect of insurance contracts, since the answer determines whether multiple loss events are aggregated under one limit or treated separately — with significant financial consequences. Policy language, case law, and regulatory guidance vary substantially across jurisdictions: U.S. courts have developed competing "cause" and "effect" tests, while the Lloyd's market and UK courts have their own body of precedent. Selecting the appropriate per occurrence limit is a core task of underwriting and risk management, informed by exposure analysis, catastrophe modeling, and the insured's loss history.
⚖️ Getting the per occurrence limit right has cascading effects across the insurance value chain. For the insured, too low a limit creates a gap that could result in devastating uninsured losses; too high a limit means paying for capacity that may never be needed. For insurers and reinsurers, per occurrence limits define the maximum probable maximum loss per event and drive reinsurance program design — particularly the attachment points and limits of per-occurrence reinsurance treaties. The interplay between per occurrence and aggregate limits also shapes capital management decisions, as regulators and rating agencies evaluate an insurer's net exposure to large single events when assessing solvency and financial strength.
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