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📄 '''Loss report''' is a documented record of [[Definition:Claim | claims]] activity, summarizing the losses incurred under a particular [[Definition:Insurance policy | insurance policy]], book of business, or [[Definition:Reinsurance treaty | reinsurance treaty]] over a defined period. In both primary insurance and [[Definition:Reinsurance | reinsurance]], loss reports serve as the principal vehicle for communicating claims experience between parties — from [[Definition:Policyholder | policyholders]] and [[Definition:Broker | brokers]] to [[Definition:Insurance carrier | carriers]], [[Definition:Managing general agent (MGA) | MGAs]], and reinsurers. The depth and format of a loss report vary widely depending on the context: a simple personal-lines report might list individual claim dates and payments, while a complex commercial or reinsurance loss report may include [[Definition:Incurred but not reported (IBNR) | IBNR]] estimates, [[Definition:Case reserve | case reserves]], development triangles, and breakdowns by [[Definition:Line of business | line of business]] or coverage layer.

⚙️ In practice, loss reports flow through the insurance value chain at regular intervals — monthly, quarterly, or annually — and at key decision points such as [[Definition:Policy renewal | policy renewals]], [[Definition:Reinsurance placement | reinsurance placements]], and [[Definition:Underwriting audit | underwriting audits]]. A cedent providing a loss report to its reinsurer, for example, will typically detail paid losses, outstanding [[Definition:Reserve (insurance) | reserves]], and aggregate incurred amounts, enabling the reinsurer to track its exposure and adjust its own reserves accordingly. In the [[Definition:Lloyd's of London | Lloyd's]] market, [[Definition:Coverholder | coverholders]] and [[Definition:Delegated underwriting authority (DUA) | delegated authority]] partners are contractually obligated to submit loss reports to the lead [[Definition:Lloyd's syndicate | syndicate]] in formats prescribed by [[Definition:Lloyd's Market Association | market standards]]. Regulatory reporting requirements also shape loss report content: under [[Definition:Solvency II | Solvency II]] in Europe, [[Definition:Statutory accounting | statutory accounting]] rules in the United States, and [[Definition:IFRS 17 | IFRS 17]] globally, insurers must maintain loss data at a level of granularity sufficient to support actuarial analysis and supervisory review.

🔍 Accurate and timely loss reporting underpins nearly every downstream function in insurance operations. [[Definition:Actuary | Actuaries]] rely on loss reports to set reserves and price future business; [[Definition:Underwriting | underwriters]] use historical loss data to assess risk quality and decide whether to renew or adjust terms; and [[Definition:Claims management | claims managers]] use them to identify trends, detect potential [[Definition:Fraud | fraud]], and manage caseloads. When loss reports are delayed, incomplete, or inconsistent — a chronic challenge in markets with fragmented technology — the consequences ripple outward: reserves may be understated, reinsurance recoveries delayed, and portfolio decisions made on stale information. The growing adoption of [[Definition:Insurtech | insurtech]] platforms and [[Definition:Application programming interface (API) | API]]-driven data exchanges is gradually improving the speed and consistency of loss reporting, but the quality of the underlying data remains only as good as the processes used to capture and validate it at the point of claim.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Loss ratio (L/R)]]
* [[Definition:Case reserve]]
* [[Definition:Incurred but not reported (IBNR)]]
* [[Definition:Bordereaux]]
* [[Definition:Claims management]]
* [[Definition:Loss development triangle]]
{{Div col end}}

Definition:Loss report - Revision history

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