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💰 '''Single-life annuity''' is an [[Definition:Annuity | annuity]] contract that provides periodic income payments for the lifetime of one designated individual — the [[Definition:Annuitant | annuitant]] — and ceases all payments upon that person's death. It represents the purest form of longevity risk transfer in the [[Definition:Life insurance | life insurance]] industry: the annuitant exchanges a lump sum or series of [[Definition:Premium | premiums]] for a guarantee that income will continue no matter how long they live, while the [[Definition:Insurance carrier | insurer]] assumes the risk that the annuitant will survive well beyond average [[Definition:Life expectancy | life expectancy]]. Because payments stop at the annuitant's death with no residual value passing to [[Definition:Beneficiary | beneficiaries]], single-life annuities typically offer the highest periodic payment amount among comparable annuity structures.

🔄 When an insurer prices a single-life annuity, [[Definition:Actuary | actuaries]] rely on [[Definition:Mortality table | mortality tables]] calibrated to the annuitant population, [[Definition:Interest rate | interest rate]] assumptions reflecting the insurer's expected investment returns on the [[Definition:Reserve | reserves]] backing the contract, and expense and profit margins. The insurer pools large numbers of annuitants, counting on the statistical predictability of mortality within the group to manage the risk that some individuals will far outlive projections. [[Definition:Asset-liability management (ALM) | Asset-liability management]] is critical: the insurer must match the duration and cash flow profile of its investment portfolio to the projected pattern of annuity payments, a challenge that intensifies in low-interest-rate environments. Regulatory frameworks such as [[Definition:Solvency II | Solvency II]] in Europe, [[Definition:Risk-based capital (RBC) | risk-based capital]] requirements in the United States, and equivalent regimes in Japan and other markets all require insurers to hold capital specifically for the [[Definition:Longevity risk | longevity risk]] embedded in these contracts. Many insurers further mitigate this risk by purchasing [[Definition:Longevity reinsurance | longevity reinsurance]] or [[Definition:Longevity swap | longevity swaps]] from [[Definition:Reinsurer | reinsurers]] and capital markets participants.

🎯 Single-life annuities play a foundational role in retirement systems around the world. They are a standard payout option under defined benefit [[Definition:Pension | pension]] plans, a core product in individual retirement planning, and a central element of [[Definition:Pension risk transfer | pension risk transfer]] transactions in which corporate plan sponsors offload their longevity and investment obligations to an insurer through a [[Definition:Buy-out | buy-out]] or [[Definition:Buy-in | buy-in]]. The trade-off inherent in the product — maximum income during life in exchange for nothing at death — means that purchasers must weigh their personal longevity expectations, the availability of other assets for their heirs, and their tolerance for leaving no residual estate. Variations such as [[Definition:Life annuity with period certain | life annuities with period certain]] or [[Definition:Joint-and-survivor annuity | joint-and-survivor annuities]] exist precisely to address these concerns, but the single-life form remains the benchmark against which all other annuity structures are measured.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Annuity]]
* [[Definition:Joint-and-survivor annuity]]
* [[Definition:Longevity risk]]
* [[Definition:Pension risk transfer]]
* [[Definition:Mortality table]]
* [[Definition:Life annuity with period certain]]
{{Div col end}}

Definition:Single-life annuity - Revision history

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