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🔎 '''Actuarial reserve review''' is the systematic examination and validation of the [[Definition:Reserve | reserves]] held by an [[Definition:Insurance carrier | insurance company]] to meet its future policyholder obligations, conducted by qualified [[Definition:Actuaries | actuaries]] using recognized methodologies and professional standards. Reserves represent one of the largest items on an insurer's balance sheet — for both [[Definition:Life insurance | life]] and [[Definition:Non-life insurance | non-life]] lines — and their adequacy directly determines whether the company can honor its promises. The review may be performed internally by the insurer's own actuarial team, by an [[Definition:Appointed actuary | appointed actuary]] required under statute, or by external consultants engaged for independent validation, regulatory compliance, or [[Definition:Mergers and acquisitions (M&A) | transaction]] due diligence.

⚙️ During a reserve review, actuaries evaluate the methods, assumptions, and data underlying the current booked reserves and assess whether they remain appropriate. For [[Definition:Property and casualty insurance | property and casualty]] business, this typically involves analyzing [[Definition:Loss development | loss development]] patterns through techniques such as chain-ladder, [[Definition:Bornhuetter-Ferguson method | Bornhuetter-Ferguson]], and frequency-severity models, then comparing projections against carried reserves. For life and health portfolios, the review examines mortality, morbidity, lapse, and expense assumptions embedded in the [[Definition:Technical provisions | technical provisions]], often stress-testing them under alternative scenarios. The applicable regulatory framework heavily shapes the process: a U.S. review may follow [[Definition:Statutory accounting principles (SAP) | statutory]] requirements and guidance from the [[Definition:Actuarial standards board | Actuarial Standards Board]], while reviews in [[Definition:Solvency II | Solvency II]] jurisdictions must address the risk margin and best-estimate liability under that regime, and carriers reporting under [[Definition:IFRS 17 | IFRS 17]] must evaluate the [[Definition:Contractual service margin (CSM) | contractual service margin]] and discount rate assumptions.

📊 Regular and rigorous reserve reviews serve as an early warning system for financial deterioration. Adverse development — where actual [[Definition:Claims | claims]] experience exceeds prior expectations — can erode [[Definition:Surplus | surplus]], trigger rating downgrades, and in severe cases threaten [[Definition:Solvency | solvency]]. High-profile reserve strengthening events, such as those experienced by major [[Definition:Lloyd's of London | Lloyd's]] syndicates during the asbestos and environmental liability crises, underscore the consequences of inadequate reserving. Beyond regulatory compliance, reserve reviews play a pivotal role in [[Definition:Mergers and acquisitions (M&A) | M&A]] transactions, where a buyer's actuaries independently evaluate the target's reserves to price the deal and structure protections such as [[Definition:Loss portfolio transfer (LPT) | loss portfolio transfers]]. For [[Definition:Reinsurance | reinsurers]], the reserve review process carries additional complexity, as they must rely on cedant-reported data that may lag or differ in granularity from direct insurer records.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Loss reserve]]
* [[Definition:Appointed actuary]]
* [[Definition:Incurred but not reported (IBNR)]]
* [[Definition:Loss development]]
* [[Definition:Technical provisions]]
* [[Definition:Actuarial guidelines]]
{{Div col end}}

Definition:Actuarial reserve review - Revision history

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