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2026-03-10T05:00:13Z

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📄 '''Loss run''' is a detailed historical report of [[Definition:Claim | claims]] activity on an [[Definition:Insurance policy | insurance policy]] or group of policies, typically generated by the current or prior [[Definition:Insurance carrier | insurance carrier]] at the request of a [[Definition:Policyholder | policyholder]], [[Definition:Insurance broker | broker]], or prospective insurer. The report catalogs individual claims — including dates of loss, descriptions, [[Definition:Claim status | claim status]], amounts paid, and outstanding [[Definition:Case reserve | reserves]] — over a specified period, usually three to five years. In effect, a loss run serves as the policyholder's claims "credit report" and is a foundational document in the [[Definition:Underwriting | underwriting]] and [[Definition:Insurance renewal | renewal]] process.

🔍 When an [[Definition:Underwriter | underwriter]] evaluates a new submission or a renewal account, loss runs are among the first documents reviewed. The underwriter examines claim frequency, severity, trends, and the nature of losses to gauge the risk's quality and to determine appropriate [[Definition:Premium | premium]] levels, [[Definition:Deductible | deductibles]], and coverage terms. [[Definition:Insurance broker | Brokers]] also use loss runs strategically — presenting clean or improving loss histories to negotiate better terms across the market, or packaging the data alongside narrative explanations when adverse experience needs context. In commercial lines, especially [[Definition:Workers' compensation insurance | workers' compensation]] and [[Definition:General liability insurance | general liability]], loss runs are indispensable for [[Definition:Experience rating | experience rating]] calculations and for [[Definition:Loss-sensitive program | loss-sensitive]] program design.

📌 Without accurate, timely loss runs, the underwriting process stalls. Delays in obtaining them — a common frustration across the industry — can push renewal timelines dangerously close to expiration, leading to coverage gaps or hurried decision-making. Recognizing this bottleneck, several [[Definition:Insurtech | insurtech]] platforms now automate loss-run retrieval and parsing, converting unstructured PDF reports into standardized data that can feed directly into [[Definition:Underwriting workbench | underwriting workbenches]] and [[Definition:Rating engine | rating engines]]. As the industry moves toward data-driven placement, the humble loss run is being transformed from a static document into a dynamic data asset that accelerates decision-making across the [[Definition:Insurance value chain | insurance value chain]].

'''Related concepts'''
{{Div col|colwidth=20em}}
* [[Definition:Underwriting]]
* [[Definition:Experience rating]]
* [[Definition:Claim]]
* [[Definition:Loss ratio (L/R)]]
* [[Definition:Insurance renewal]]
* [[Definition:Case reserve]]
{{Div col end}}

Definition:Loss run - Revision history

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