What Is an Annuity?

An annuity is a long-term contract between a consumer and a life insurance carrier. The consumer pays one or more premiums. The carrier returns periodic payments according to the contract terms. The structure has been used in roughly its current form for over a century, regulated at the state level by each state’s department of insurance.

The defining feature of the annuity category is that the carrier accepts a specific retirement risk in exchange for the premium. The risk transferred varies by product type. A single premium immediate annuity (SPIA) transfers longevity risk. A multi-year guaranteed annuity (MYGA) transfers reinvestment risk. A fixed indexed annuity (FIA) transfers market-loss risk on the principal. A variable annuity with an income rider can transfer both market and longevity risk.

The six product categories

Annuities come in six structurally distinct types. Each addresses a different retirement question.

Fixed Indexed Annuity (FIA). A principal-protected deferred annuity that credits interest based on the movement of a market index, capped or scaled on the upside and floored at zero. Read more on the FIA pillar page.

Multi-Year Guaranteed Annuity (MYGA). A fixed annuity that pays a guaranteed declared rate for a fixed term, typically 2 to 10 years. The annuity equivalent of a CD with tax deferral. Read more on the MYGA pillar page.

Single Premium Immediate Annuity (SPIA). Converts a lump sum into guaranteed monthly income that begins within 12 months of issue. Read more on the SPIA pillar page.

Deferred Income Annuity (DIA). Pay a premium today, receive guaranteed income that begins at a future date. Used as longevity insurance. Read more on the DIA pillar page.

Variable Annuity (VA). A registered insurance contract whose value moves with investments in subaccounts. Optional riders add guarantees. Read more on the variable annuity pillar page.

Qualified Longevity Annuity Contract (QLAC). A specialized DIA funded with IRA money that defers income past age 73 and reduces required minimum distributions. Read more on the QLAC pillar page.

How annuities differ from investments

Annuities are insurance products, not investment products. The distinction matters in three ways.

First, the carrier guarantees the payout structure (subject to the carrier’s financial strength). A diversified mutual fund portfolio does not guarantee a future income level. An annuity does.

Second, mortality credits apply to life-payout annuities. When some contract owners die earlier than the actuarial average, their premiums subsidize continued payments to those who live longer. This is the structural feature that makes a SPIA produce more lifetime income for a long-lived consumer than a self-managed bond portfolio of the same dollar amount.

Third, annuities are regulated primarily as insurance products, not as securities. Variable annuities are the exception — they are registered with the SEC and require a prospectus.

Accumulation and payout phases

Most deferred annuities have two phases. The accumulation phase is the period during which the premium grows inside the contract, tax-deferred. The payout phase is the period during which the carrier pays income to the consumer.

Some products skip the accumulation phase entirely. A SPIA begins paying income immediately after issue. Others have a long accumulation followed by a payout that runs for life — DIAs, QLACs, FIAs with income riders, VAs with GLWB riders.

Annuitization is the act of converting a deferred contract into a payout phase. Once initiated, annuitization is generally irrevocable. Modern annuities often offer income through a “withdrawal benefit” rider that preserves access to the contract value while still paying a guaranteed income, an alternative to traditional annuitization.

When an annuity fits

Annuities address specific retirement risks. They are not universal vehicles. They fit best when one of the following applies:

• The consumer wants insurance against living past actuarial life expectancy
• The consumer is in or near retirement and cannot afford a major market loss on principal
• The consumer wants a guaranteed rate of return for a defined period
• The consumer wants a paycheck that does not depend on market performance

If the primary goal is market growth, an annuity is rarely the right tool. Direct investment in low-cost index funds typically produces more growth at lower cost.

When an annuity does not fit

Annuities are long-term commitments. They are rarely a good fit when:

• The consumer may need full liquidity during the surrender period
• The consumer is in a low tax bracket where tax deferral provides limited benefit
• The consumer’s time horizon is shorter than the surrender period
• The consumer is being sold an annuity as a primary growth vehicle for assets that should remain liquid

Tax treatment, briefly

All annuities grow tax-deferred during the accumulation phase. Interest, dividends, and capital gains credited inside the contract are not taxed annually. When withdrawn, the gain is taxed as ordinary income, not as long-term capital gains. Withdrawals before age 59½ may incur a 10% federal tax penalty.

Annuities can be funded with qualified retirement money (IRA, 401(k), 403(b), 457(b)) or non-qualified after-tax money. Qualified contracts are subject to standard IRA tax rules. Non-qualified contracts use the exclusion ratio to determine how much of each income payment is taxable.

For a deeper dive, see the article on how annuities are taxed.

The next step

Reading about annuities is the first step. Comparing actual contract terms across carriers is the second. The third is matching the product to a specific retirement question, which is best done with a licensed independent advisor who can quote multiple carriers.

The educational resources on this site (the pillar pages, glossary, and calculators) are designed to make those conversations more productive.