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⏳ '''Unwind of discount''' describes the accounting charge that arises when the present value of an [[Definition:Insurance carrier | insurer's]] discounted [[Definition:Loss reserve | loss reserves]] or insurance contract liabilities increases as time passes and the expected claim payment date draws closer. Because discounting reduces a future obligation to its present value using a [[Definition:Discount rate | discount rate]], the mere passage of time — holding all other assumptions constant — causes the liability to grow toward its [[Definition:Undiscounted loss | undiscounted]] face value. This time-driven increase is recognized in the [[Definition:Income statement | income statement]] as a finance cost, often labeled "unwind of discount" or "accretion of interest" on reserves, and it is a standard feature of any accounting regime that requires discounted insurance liabilities, including [[Definition:IFRS 17 | IFRS 17]] and [[Definition:Solvency II | Solvency II]] economic balance sheets.

🔄 Mechanically, the unwind functions much like the accrual of interest on a bond held at amortized cost, but in reverse — the insurer is the obligor rather than the investor. At the start of each reporting period, the discounted reserve balance is multiplied by the applicable discount rate (or rates, if the yield curve structure is granular) to produce the period's unwind charge. Under IFRS 17, the treatment splits further: insurers may choose to recognize the effect of discount rate changes in [[Definition:Other comprehensive income (OCI) | other comprehensive income]] while running the unwind itself through profit or loss at the rate locked in at initial recognition, or they may run everything through the income statement. The choice significantly affects [[Definition:Earnings volatility | earnings volatility]], and companies across Europe and Asia have adopted differing approaches based on their asset-liability management strategies.

📉 The unwind of discount is not merely a technical accounting entry — it has real consequences for how investors and [[Definition:Rating agency | rating agencies]] evaluate an insurer's profitability. For long-tail lines such as [[Definition:Liability insurance | casualty]] and [[Definition:Workers' compensation insurance | workers' compensation]], where reserves are held for years or even decades, the cumulative unwind charge can be substantial, creating a persistent drag on reported earnings that must be offset by [[Definition:Investment income | investment income]] earned on the assets backing those reserves. Failing to earn returns in excess of the unwind cost effectively means the insurer is losing money on its reserving position in economic terms. Analysts therefore closely compare the unwind charge against actual investment yields to gauge whether an insurer's [[Definition:Asset-liability management (ALM) | asset-liability matching]] is generating positive spread, a key indicator of financial health in any discounted-reserve environment.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Undiscounted loss]]
* [[Definition:Discount rate]]
* [[Definition:Loss reserve]]
* [[Definition:IFRS 17]]
* [[Definition:Asset-liability management (ALM)]]
* [[Definition:Investment income]]
{{Div col end}}

Definition:Unwind of discount - Revision history

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