Definition
Lapse rate is the percentage of annuity contracts in a given cohort that terminate before maturity in a given period, typically expressed as an annual rate and tracked by contract year because lapse behavior changes systematically as the contract ages.
Why it matters
Lapse behavior is one of the largest pricing-assumption uncertainties in long-dated annuity contracts. Carriers price contracts assuming a lapse curve; if actual lapses run materially higher or lower than assumed, the economics of the block change in ways that can affect the carrier's solvency on the block. Lapse rate is also the parameter through which conditional liquidity is priced — products with the most generous surrender provisions are the most sensitive to lapse-assumption error.
How it works
Lapse rate is measured by contract year: the percentage of contracts in force at the start of contract year N that terminate during year N. The pattern across most deferred annuities is a low base lapse rate during the surrender-charge period (commonly 1%–4% per year), a "shock lapse" in the year the surrender charge expires (often 15%–25% in that single year), and a lower steady-state lapse rate thereafter. The shock pattern reflects the behavioral response of contract owners to the removal of a surrender penalty. Pricing assumes a lapse curve, and the carrier's asset-liability management policy is set against that curve. Actual lapse experience can diverge: interest-sensitive lapses rise when prevailing rates move above the contract's credited rate, surrender activity rises when contract owners face liquidity needs, and persistency exceeds expectation when the contract's credited rate exceeds prevailing alternatives. Each direction creates a different solvency exposure for the carrier.
In practice
An individual reading a contract illustration sees the surrender schedule, the free withdrawal provision, and — for some products — a benefit-base mechanic that interacts with surrender choice. The lapse-rate assumption that produced the illustration is not visible. What matters to the contract owner directly is the cost of lapsing: the surrender charge, any market-value adjustment, the tax consequences of the lapse, and the loss of any conditional benefit (guaranteed income base, bonus credits) that the contract has accrued. Individuals should understand that the relationship between surrender charges and lapse incentives is constructed deliberately at pricing — the surrender schedule is the carrier's mechanism for protecting the priced lapse curve, not a separate penalty layered on top of an otherwise complete contract.
In the Longevity Standard Framework
Lapse rate is supporting vocabulary in the Longevity Standard framework, and is the behavioral parameter through which the value of the liquidity property in deferred annuities is priced. The liquidity property in deferred annuities is conditional — capital access is available subject to constraints, typically a surrender schedule — and lapse rate is the assumption that translates that conditional access into pricing. Higher assumed lapse rates compress the expected economic life of the contract on the carrier's books, which affects acquisition-cost amortization and asset-liability management. Lapse rate sits at the carrier-side mirror of the contract owner's surrender decision, and the spread-based business model relies on its assumed lapse curve materializing within tolerance. Persistency is the complementary parameter, expressed from the inverse perspective.
Related terms
- Persistency
- Surrender charge
- Free withdrawal provision
- Deferred acquisition cost
- Asset-liability management
- Liquidity
- Spread-based business model
- Status quo bias