Definition
A guaranteed minimum accumulation benefit (GMAB) is a rider attached to a deferred annuity contract that guarantees the contract's account value will reach a specified minimum amount at the end of a defined accumulation period, regardless of investment performance, in exchange for a separately disclosed annual rider charge.
Why it matters
The GMAB addresses a different concern than the lifetime-income riders — it protects the contract's accumulation against investment loss over a defined holding period rather than guaranteeing lifetime income. It is most commonly attached to variable annuities, where the underlying subaccount investments are exposed to market risk, and provides a contractual floor on the account value at the end of the accumulation period.
How it works
The GMAB specifies a minimum guaranteed amount — typically the original premium, sometimes adjusted for partial withdrawals or for periodic step-ups — and a contractually specified accumulation period, often seven to ten years from contract issue or rider election. If, at the end of the accumulation period, the contract's account value is below the guaranteed minimum, the carrier credits the difference to bring the account value up to the minimum; if the account value is above the minimum, no adjustment is made and the rider has no operative effect at that point. The rider charge is assessed annually throughout the accumulation period, typically as a percentage of the account value or a defined benefit base. Some GMAB designs include step-up provisions that periodically reset the guaranteed minimum to a high-water mark of the account value, and some include the option to elect a new accumulation period at the end of the original one.
In practice
For an individual considering a GMAB, the operative questions are the length of the accumulation period during which the rider charge accrues without operative effect on a positive-performing contract, the cost of the charge relative to the rider's downside protection, and whether the underlying contract's investment options are sufficiently risky that the protection is materially valuable. A professional advising on a GMAB should be able to present the rider's expected cost across plausible market scenarios and to compare that cost against alternative downside protection structures, including separate hedging strategies or holding a portion of the portfolio in lower-risk assets directly. The GMAB does not establish a lifetime income claim — its effect is on the account value at a point in time, not on a stream of payments.
Related terms
- Variable annuity
- Guaranteed living benefit
- Accumulation phase
- Account value
- Step-up provision
- Benefit base
- Guaranteed minimum death benefit (GMDB)
- Cost structure