Annuities Explained: How Fixed, Variable, and Indexed Contracts Actually Work

An annuity is a contract between an individual and an insurance company. In exchange for a lump-sum payment or a series of premiums, the insurer promises to make payments back to the owner, either starting immediately or at some future date. Annuities are often marketed as a way to turn savings into a paycheck that cannot be outlived, which makes them appealing to retirees worried about running out of money. But the mechanics, costs, and guarantees vary widely depending on which of the three main types is purchased.

Fixed Annuities: Predictable but Limited

A fixed annuity works much like a certificate of deposit issued by an insurer rather than a bank. The company guarantees a set interest rate for a specified period, after which the rate may reset based on current market conditions, subject to a contractual minimum. Growth is tax-deferred until withdrawal. Because the insurer bears the investment risk, fixed annuities are the simplest and generally the lowest-cost of the three categories, though their returns are correspondingly modest.

Variable Annuities: Market Exposure Inside an Insurance Wrapper

A variable annuity lets the owner allocate premiums among a menu of investment subaccounts that resemble mutual funds. The account value, and eventual payout, rises and falls with the performance of those investments. Variable annuities are registered securities, regulated by the Securities and Exchange Commission and sold with a prospectus, and are typically distributed by FINRA-licensed representatives. They often include optional riders, such as guaranteed minimum income or death benefits, that add insurance-style protection on top of market exposure. Those riders, along with mortality and expense charges, administrative fees, and subaccount expenses, can push total annual costs into the low-to-mid single digits as a percentage of account value, according to SEC investor education materials, making fee transparency essential before purchase.

Indexed Annuities: A Middle Ground With Caps and Floors

Fixed indexed annuities credit interest based on the performance of a market index, such as a broad stock index, but typically include a cap on the maximum credited return and a floor, often zero, that prevents losses from negative index performance. In exchange for that downside protection, the upside is limited through caps, participation rates, or spreads that insurers can adjust. Indexed annuities are not registered securities in most cases and are regulated primarily at the state level by insurance departments, which means disclosure requirements differ from those governing variable annuities.

Key Costs and Features to Check

• Surrender charges: most annuities impose a declining penalty, often starting around 7% to 10% and phasing out over 5 to 10 years, for withdrawals above a free annual allowance.
• Riders: optional guarantees for lifetime income or death benefits usually carry an additional annual fee layered on top of base contract costs.
• Market value adjustment: some fixed and indexed contracts adjust the surrender value up or down based on interest rate movements if the owner withdraws early.
• Free-look period: state law generally requires insurers to allow a window, often 10 to 30 days, during which a buyer can cancel and receive a full refund.

Tax Treatment

Earnings inside an annuity grow tax-deferred. When money is withdrawn from a nonqualified annuity, the IRS treats withdrawals as coming from earnings first, taxed as ordinary income, under rules described in IRS Publication 575. Withdrawals of taxable gains before age 59½ are generally subject to an additional 10% early distribution tax, with limited exceptions. Annuities held inside an IRA or other qualified retirement account follow the distribution rules of that account type rather than adding a separate tax-deferral benefit, since the IRA itself is already tax-deferred.

Who Stands Behind the Guarantee

Annuity guarantees depend entirely on the claims-paying ability of the issuing insurance company. Unlike bank deposits, annuities are not insured by the FDIC. Instead, each state maintains a guaranty association that provides a backstop if an insurer becomes insolvent, though coverage limits vary by state and are generally lower than many consumers assume. The National Association of Insurance Commissioners publishes state-by-state guaranty association contact information and coverage details for consumers who want to verify protection levels before committing significant savings to a single carrier.

Because annuities are long-term, often irrevocable commitments, regulators including the SEC and FINRA urge buyers to request the full prospectus or contract disclosure, compare surrender terms across insurers, and confirm how any income rider is calculated before signing. Independent research from a state insurance department or the NAIC can help verify an insurer's licensing status and financial strength rating.