Definition:Losses occurring
📋 Losses occurring is a reinsurance contract triggering basis under which the reinsurer responds to losses that take place during the defined contract period, regardless of when the underlying policies incepted or when the claims are reported. It stands as one of the principal coverage trigger mechanisms alongside risks attaching and claims made, and its selection has significant implications for how exposure is allocated between successive reinsurance contracts. The losses-occurring basis is widely used in excess-of-loss reinsurance placements across global markets, from Lloyd's to Continental European and Asian treaty programs.
🔧 Under this basis, the key determinant is the date of the loss event itself — not the inception date of the original direct policy or the date on which the insured reports the claim to the cedant. For example, if a reinsurance treaty with a losses-occurring trigger runs from January 1 to December 31, it covers any qualifying loss event happening within that calendar year, even if the original policy was written in a prior year or the claim is not reported until well after the treaty expires. This creates a clean delineation by event timing but can produce exposure to late-reported claims, since the reinsurer remains liable for events within the treaty period no matter how long notification is delayed. To manage this tail, many contracts include a sunset clause or reporting-period limitation that caps the window during which claims can be presented.
🌍 Choosing between losses occurring and alternative trigger bases carries strategic consequences for both cedants and reinsurers. The losses-occurring basis provides seamless coverage across a cedant's entire in-force book during the treaty period — there are no gaps caused by policies incepting before the treaty's start date, which can be a vulnerability under risks-attaching structures. However, the open-ended reporting tail means reinsurers must hold reserves for longer, creating reserve uncertainty that is reflected in pricing and contract terms. In catastrophe reinsurance, losses occurring is the dominant basis because natural disasters affect the entire portfolio simultaneously regardless of individual policy inception dates. Understanding these dynamics is essential for brokers structuring programs, actuaries reserving for reinsurance recoverables, and regulators assessing the adequacy of reinsurance protection.
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