Annuity Products: Immediate, Deferred and Variable
The three basic shapes an annuity can take — pay out now, pay out later, or pay out an amount that depends on markets — and what risk each structure actually transfers from the buyer to the insurer.
Prerequisites: Life vs General Insurance Liability Profiles
An annuity is, at its core, a contract that trades a lump sum (or a stream of payments) for a guaranteed income later — the buyer is paying an insurer to take on the risk that they'll outlive their savings. But "annuity" covers products with genuinely different risk profiles depending on when payments start and who bears the investment risk in between.
The three basic structures
An immediate annuity starts paying out right away: hand the insurer a lump sum today, and it begins sending a monthly check immediately, calculated using current interest rates and the buyer's life expectancy at purchase. It's the simplest structure — mostly a longevity bet, converting a pool of money into guaranteed lifetime income starting now.
A deferred annuity pushes the payout start date into the future — the buyer pays in now (as a lump sum or over time), the money grows tax-deferred for years, and income payments only begin at a chosen later date, often retirement. The insurer is managing both an investment period and a later longevity commitment.
A variable annuity ties the accumulated value to the performance of underlying investment funds chosen by the buyer, rather than a fixed rate — so the account value can rise or fall with markets during the accumulation phase, shifting investment risk substantially onto the buyer instead of the insurer. Insurers often layer optional guarantees on top of variable annuities (a minimum income floor regardless of market performance), which reintroduces insurer risk on the downside even though the buyer bears the market upside and downside day to day.
A concrete comparison: a 65-year-old converting $500,000 into an immediate annuity might receive roughly $2,700 a month for life, fixed regardless of markets. The same $500,000 in a variable annuity might be invested in equity and bond funds chosen by the buyer, with the eventual payout depending on how those funds perform between now and when withdrawals start — a materially different risk than the immediate annuity's fixed check.
What this means in practice
For anyone analyzing an insurer's book, the mix of immediate, deferred, and variable annuities on the balance sheet tells you a great deal about what risk the insurer is actually carrying — longevity risk dominates immediate annuities, while variable annuity books carry meaningful market risk (and, where guarantees are attached, hedging obligations) on top of the underlying mortality assumption.
Immediate annuities pay out now and are mostly a longevity bet; deferred annuities add an accumulation period before payout begins; variable annuities shift investment risk onto the buyer by tying the account value to fund performance, though attached guarantees can push some of that risk back onto the insurer.
People often assume all annuities are simple, fixed-income products. Variable annuities in particular can carry meaningful market risk and complex embedded guarantees — treating one like a plain fixed annuity when comparing products misses most of what actually distinguishes them.
Further reading
- Society of Actuaries, Annuity Product Design and Pricing