What Is an Annuity? How the Contract Works, Step by Step

If someone has offered you an annuity, or you keep hearing the word in retirement conversations, it helps to start with what an annuity actually is. Strip away the product names and marketing, and every annuity is the same basic thing: a contract with an insurance company.

The SEC's investor education site, Investor.gov, describes an annuity as "a contract between you and an insurance company that is designed to meet retirement and other long-term goals." You pay money in, and in return the insurer makes promises about growth, income, or both. The details of those promises are what separate one annuity from another.

This guide walks through the moving parts so the rest of the vocabulary makes sense. It is general information, not financial, insurance, tax or legal advice.

The basic deal

You buy an annuity by paying the insurer either one lump sum or a series of payments, which FINRA calls premiums. In exchange, according to Investor.gov, the insurer agrees to make periodic income payments to you, beginning either right away or at some future date.

You are not locked into taking income. Investor.gov notes that you may instead be able to withdraw the contract's value as a lump sum, but doing so can trigger surrender charges, taxes and tax penalties. That trade-off, flexibility on paper but real costs for leaving early, is one of the most important things to understand about annuities.

The people named in the contract

An annuity contract usually names three roles. FINRA's annuities glossary defines them this way:

• The contract owner pays the premium and controls the contract. The owner can make withdrawals and investment decisions, surrender the contract, change the beneficiary and convert a deferred contract into an income stream.
• The annuitant is the person whose life expectancy determines the payout benefits. The owner and annuitant can be the same person.
• The beneficiary is the person the owner designates to receive any benefits due when the annuitant or owner dies.

These roles matter more than they first appear. For example, imagine a hypothetical couple where one spouse owns the contract but the other is named as annuitant. Who controls withdrawals, and whose lifespan sets the payments, depends on how the contract was written. Read the application carefully before you sign.

Two phases: building up and paying out

Most annuities have two stages, and Investor.gov uses the same names for them across product types.

1. The accumulation phase is the period when your money is allowed to grow before income starts. In a deferred annuity, you can add money over time during this phase, and growth is tax-deferred.
2. The payout phase is the period when income payments begin.

Investor.gov sorts annuities by when that second phase starts. With an immediate annuity, you make a single payment and typically start receiving income within one year. With a deferred annuity, you pay in now or over time and start income later. Our guide in this section on immediate versus deferred annuities covers that choice in detail.

What an annuity can do for you

Investor.gov lists three things annuities can provide:

• Tax-deferred growth. You pay no taxes on interest or investment gains inside the annuity until you withdraw money, receive income payments or a death benefit is paid.
• Guaranteed income. You can receive periodic payments for a set period or for the rest of your life, or the life of a spouse or partner.
• Death benefits. If you die before income starts, your beneficiary receives at least the current value of the annuity, and sometimes more.

The word "guaranteed" deserves a caution. Investor.gov stresses that an insurer's obligations under an annuity are subject to its financial strength and claims-paying ability, so if the insurer runs into financial trouble, it may not be able to pay you. FINRA adds that annuities are not guaranteed by the FDIC, SIPC or any other federal agency. If an insurer fails, a state life and health insurance guaranty association may provide limited protection, but the NAIC's model law (2018 edition) describes significant limits and exclusions, states set their own rules, and the model bars sellers from using that coverage as a sales pitch.

What you give up in return

Every benefit has a cost, and the costs are easy to overlook in a sales conversation.

• Access to your money. Many annuities charge a surrender charge if you withdraw during a set surrender period after purchase. FINRA defines the surrender period as the time during which you cannot surrender the annuity without penalty, and notes it will be spelled out in the contract.
• Fees. FINRA lists surrender charges, mortality and expense risk charges and administrative fees, and says annuities can carry high commissions. Optional features called riders usually cost extra. Investor.gov points out that some annuities also have implicit costs, such as limits on how much you can earn, that reduce value even when no fee appears on a statement. The Costs & Fine Print section of this site explains these in depth.
• Flexibility after income starts. FINRA notes that the decision to annuitize, meaning converting the contract into a guaranteed income stream, is generally irrevocable.
• Tax treatment on the way out. FINRA explains that gains are taxed at ordinary income rates when withdrawn, and Investor.gov warns that withdrawals before age 59½ may face an IRS tax penalty on top of income tax; for 2025 returns, IRS Publication 575 describes it as a 10% additional tax on the taxable part, with some exceptions.

Who regulates annuities

Who oversees an annuity depends on what kind it is. The NAIC, the organization of state insurance commissioners, notes that annuities are regulated by state insurance commissioners. FINRA explains that variable annuities and registered index-linked annuities (RILAs) are also securities, so they are regulated by the SEC and FINRA as well.

According to Investor.gov, annuities that register with the SEC come with a prospectus. Another registered type is the registered market value adjustment (MVA) annuity, which pays a fixed rate over a set period but may adjust your value, often downward, if you withdraw early.

This affects where you go for help. For a fixed or fixed indexed annuity, your state insurance department is the main contact. For a variable annuity or RILA, the SEC and FINRA are also involved, and you can look up a seller's registration on FINRA BrokerCheck.

Before you go further

Investor.gov's advice is simple and worth following: read everything you are given, including the contract and any prospectus, make sure the documents match your understanding, and ask questions about anything you don't understand. State law also gives you a "free look" period after you receive the contract to change your mind. Investor.gov (as viewed in October 2026) says it is usually 10 to 30 days, but the length varies by state, so check what your own contract says.

Be alert to pressure and scams. The NAIC warns that "many people have been harmed by annuity scams," and suggests calling your state insurance department for help or to file a complaint if you think you were misled. The NAIC also cautions that senior-sounding titles held by a seller don't always mean specialized training, so ask what any designation required.

For personal guidance, contact your state insurance department, which you can find through the NAIC, or a licensed financial, tax or legal professional who can look at your whole situation.

Key takeaways

• An annuity is a contract with an insurance company: you pay premiums, and the insurer promises growth, income or both.
• Most annuities have an accumulation phase and a payout phase; immediate annuities skip straight to payout.
• Annuities can offer tax-deferred growth, lifetime income and death benefits, but those promises depend on the insurer's ability to pay.
• The trade-offs include surrender charges, fees, limited access to your money and taxes on withdrawals.
• All annuities are regulated by states; variable annuities and RILAs are also securities overseen by the SEC and FINRA.

Sources - U.S. Securities and Exchange Commission (Investor.gov), Annuities — https://www.investor.gov/introduction-investing/investing-basics/investment-products/annuities - FINRA, Annuities — https://www.finra.org/investors/investing/investment-products/annuities - National Association of Insurance Commissioners, Annuities (CIPR topic page) — https://content.naic.org/cipr_topics/topic_annuities.htm - National Association of Insurance Commissioners, What You Should Know Before Buying an Annuity — https://content.naic.org/sites/default/files/consumer-what-to-know-before-buying-annuity.pdf - Internal Revenue Service, Publication 575 (2025), Pension and Annuity Income — https://www.irs.gov/publications/p575 - National Association of Insurance Commissioners, Life and Health Insurance Guaranty Association Model Act #520 (2018) — https://content.naic.org/sites/default/files/model-law-520.pdf