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📅 '''Underwriting-year result''' measures the ultimate profitability of all [[Definition:Insurance policy | policies]] incepted — or [[Definition:Reinsurance | reinsurance]] contracts attaching — during a specific calendar year, tracking every [[Definition:Premium | premium]] and [[Definition:Claim | claim]] associated with those policies regardless of when the cash actually flows. This stands in deliberate contrast to [[Definition:Calendar-year result | calendar-year]] or [[Definition:Accident-year result | accident-year]] accounting, which group financial activity by when it was recorded or when losses occurred. The underwriting-year (sometimes called "year of account" in the [[Definition:Lloyd's | Lloyd's]] market) approach is especially prevalent in long-tail lines such as [[Definition:Liability insurance | liability]], [[Definition:Professional indemnity insurance | professional indemnity]], and [[Definition:Marine insurance | marine]], where claims arising from a single policy year may develop over a decade or more.

🔍 Constructing an underwriting-year result requires linking each policy to its inception year and then aggregating all related cash flows — [[Definition:Gross written premium (GWP) | written premiums]], [[Definition:Earned premium | earned premiums]], [[Definition:Paid claims | paid claims]], [[Definition:Outstanding claims reserve | outstanding claims reserves]], and [[Definition:Incurred but not reported (IBNR) | IBNR]] estimates — to that cohort. At Lloyd's, the year-of-account framework is structural: each syndicate's annual account remains open for a minimum of three years before being closed through [[Definition:Reinsurance to close (RITC) | reinsurance to close]], and the result at closure captures the true underwriting outcome for that cohort. Outside Lloyd's, insurers and reinsurers in markets governed by [[Definition:International Financial Reporting Standard 17 (IFRS 17) | IFRS 17]] increasingly report on a cohort basis that shares conceptual DNA with underwriting-year analysis, since IFRS 17 groups contracts by year of issue and profitability. Under [[Definition:US GAAP | US GAAP]], underwriting-year triangulations appear prominently in [[Definition:Actuarial analysis | actuarial analyses]] and regulatory filings such as [[Definition:Schedule P | Schedule P]] of the U.S. annual statement, even though the primary financial statements remain calendar-year based.

📈 The reason underwriting-year results command so much attention — particularly among [[Definition:Reinsurer | reinsurers]], Lloyd's participants, and sophisticated investors — is that they reveal the true economics of the risks written in a given period, uncontaminated by reserve movements from prior years or timing mismatches between premium collection and loss emergence. A calendar-year profit can mask deteriorating [[Definition:Underwriting | underwriting]] quality if favorable reserve releases from old years paper over poor current-year performance. Underwriting-year analysis strips that noise away. For capital providers evaluating a [[Definition:Managing general agent (MGA) | managing general agent]] or a Lloyd's [[Definition:Syndicate | syndicate]], the trajectory of underwriting-year results across successive cohorts is often the single most telling indicator of whether the operation genuinely creates value or merely defers recognition of losses.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Accident-year result]]
* [[Definition:Calendar-year result]]
* [[Definition:Reinsurance to close (RITC)]]
* [[Definition:Loss development]]
* [[Definition:Combined ratio]]
* [[Definition:Year of account]]
{{Div col end}}

Definition:Underwriting-year result - Revision history

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