What an Annuity Is and How It Works

An annuity is a contract with an insurance company where you give them money now, and they pay you back in regular installments over time

You hand over a lump sum — or make payments over several years — and the insurance company promises to send you money on a schedule you choose: monthly, quarterly, yearly, or all at once. The amount you receive depends on how much you put in, how long the contract lasts, and what type of annuity you buy. An annuity is not a government program or an investment account you manage yourself. It is a binding agreement with a private insurance company.

Annuities are often used as a retirement income tool because they turn a sum of money into a predictable stream of payments. Unlike a savings account, where you control the balance, an annuity locks your money into the contract terms. You cannot easily withdraw extra money without penalties, and the insurance company keeps whatever balance remains after the contract ends — unless you choose a different payout structure.

Key Takeaways

• An annuity is a contract between you and an insurance company where you pay money upfront and receive regular payments back over a set period or for life.
• The insurance company holds your money and assumes the risk that you will live longer than expected, which is why annuities can may provide income for life.
• Annuities come in different types — when ready, deferred, fixed, and variable — each with different rules about when payments start and how much they grow.
• Once you sign an annuity contract, your money is locked in, and early withdrawals usually come with steep penalties that can reduce your payout significantly.
• Annuities are sold by insurance companies and insurance agents, not by banks or brokerage firms, and the terms vary widely between products.

How an annuity contract works step by step

You contact an insurance company or work with an insurance agent and choose an annuity product. You decide how much money to give the company — this is called the principal or premium. The insurance company then invests or holds that money according to the annuity type you selected.

On the date the contract specifies, the insurance company begins sending you payments. Those payments continue for the length of time you chose when you bought the contract. If you chose a life annuity, payments continue until you die. If you chose a term certain annuity, payments stop after a fixed number of years — say, 20 years — regardless of whether you are still alive. You receive the payments whether the stock market goes up or down, whether interest rates change, or whether the insurance company's business does well or poorly.

The insurance company keeps any money left over after the contract ends. If you die before the contract period ends, the remaining balance typically goes to the insurance company unless you bought an annuity with a death benefit rider — an add-on that sends leftover money to your heirs.

The difference between when ready and deferred annuities

An when ready annuity starts paying you within one year of purchase, usually within 30 days. You give the insurance company a lump sum, and they begin sending you monthly or quarterly payments almost right away. when ready annuities are common for people who have just retired and want to convert savings into income when ready.

A deferred annuity does not pay you for several years. You give the insurance company money now, and it sits and grows (or stays flat, depending on the type) until a date you choose — perhaps 10 or 20 years in the future. Then the insurance company starts sending you payments. Deferred annuities are often bought by people in their 40s or 50s who want to lock in a future income stream but do not need the money yet.

The longer money sits in a deferred annuity before payments start, the larger each payment can be, because the insurance company has had more time to invest or hold the principal. However, if you need the money before the payout date arrives, you will face a surrender charge — a penalty that reduces how much you can withdraw.

Fixed annuities versus variable annuities

A fixed annuity pays you a set amount each period, no matter what happens in the financial markets. The insurance company guarantees the payment amount when you buy the contract. If you buy a fixed annuity that pays $1,000 per month, you will receive $1,000 per month for the life of the contract, even if inflation rises or stock prices fall. The trade-off is that your payments do not grow if markets perform well.

A variable annuity ties your payments to the performance of investments you choose — usually mutual funds or stock and bond portfolios. If those investments perform well, your payments increase. If they perform poorly, your payments decrease. Variable annuities shift investment risk to you, but they offer the possibility of higher returns. They also come with higher fees because the insurance company must manage the underlying investments and provide administrative support.

Some annuities are indexed annuities (also called equity-indexed annuities), which sit between fixed and variable. Your payments are tied to the performance of a stock market index like the S&P 500, but with a floor — you will not lose money even if the index falls. Indexed annuities have caps on how much your payment can grow in a good year, so you share in gains but not all of them.

What happens if you need money before the contract ends

Most annuities impose a surrender period — a window of time (often 5 to 10 years) during which you cannot withdraw money without a penalty. If you withdraw during the surrender period, the insurance company charges a surrender charge, which is a percentage of the amount you withdraw. Surrender charges often start high (7 to 10 percent in year one) and decline each year until the surrender period ends.

After the surrender period ends, you can usually withdraw money without a surrender charge, but you may still owe income taxes on any gains. Some annuities allow you to withdraw a small percentage each year — often 10 percent — without penalty, even during the surrender period. Check your contract to see what your specific annuity allows.

If you are under age 59½ and withdraw money from a deferred annuity, you may also owe a 10 percent federal tax penalty on top of regular income taxes, similar to the rules for early withdrawals from retirement accounts. This penalty does not explore to when ready annuities once payments have started.

Why people buy annuities and what they trade away

The main reason people buy annuities is income certainty. Once you own an annuity, you know exactly how much money will arrive each month or year. This is valuable for people who worry about outliving their savings or who want to reduce their exposure to stock market swings in retirement. An annuity can cover essential expenses — rent, utilities, food — while other savings handle variable costs.

The insurance company assumes the risk that you will live a long time. If you live to 95 and have received far more in payments than you paid in principal, the insurance company absorbs that loss. This is why annuities appeal to people concerned about longevity risk — the possibility of running out of money in old age.

The trade-off is liquidity and control. Your money is locked into the contract. You cannot access a large sum quickly without penalties. You cannot change your mind about the payout amount or structure once the contract begins. If you die early, your heirs receive nothing unless you bought a death benefit rider. Annuities also come with fees — insurance charges, administrative costs, and investment management fees for variable annuities — that reduce your overall return.

Who sells annuities and what to watch for

Annuities are sold by insurance companies and licensed insurance agents. They are not sold by banks (though banks may refer you to an agent) or by stock brokers managing a brokerage account. Insurance agents earn commissions when they sell annuities, which can be substantial — sometimes 5 to 10 percent of the principal. This commission structure means the agent has a financial incentive to sell you an annuity, so it is worth asking whether an annuity truly fits your situation or whether other options might work better.

Annuity contracts are long and complex. Before you buy, read the contract or ask the agent to explain the surrender period, surrender charges, payout options, fees, and what happens if you need money early. Different insurance companies offer different terms, so comparing contracts from multiple companies can reveal significant differences in cost and flexibility.

Frequently Asked Questions

Can I get my money back if I change my mind about an annuity?

Most states require a "free look" period of 10 to 30 days after you buy an annuity, during which you can return the contract and get your money back with no penalty. After that period ends, you can still withdraw money, but you will owe a surrender charge if you are still in the surrender period. Check your contract for the exact free look window in your state.

Is an annuity the same as a pension?

No. A pension is a benefit your employer pays you after you retire, funded by the employer and sometimes by your contributions during your working years. An annuity is a contract you buy yourself with your own money. Some employers offer annuities as a retirement payout option — you can choose to receive your pension as a lump sum and buy an annuity with it — but the two are separate products.

What is the difference between an annuity and a 401(k)?

A 401(k) is a retirement savings account where you contribute money during your working years and choose how to invest it. An annuity is a contract you buy (usually in or near retirement) that converts a sum of money into regular payments. You can buy an annuity with money you withdraw from a 401(k), but they serve different purposes: one is a savings vehicle, the other is an income vehicle.

Do I have to pay taxes on annuity payments?

Yes, but the tax treatment depends on whether the annuity was bought with pre-tax or after-tax money. If you bought it with money from a traditional IRA or 401(k), the full payment is taxable as ordinary income. If you bought it with after-tax money, only the earnings portion is taxable; the principal portion is not. Your insurance company will send you a 1099-R form each year showing how much is taxable.

What happens to my annuity if the insurance company fails?

Each state has a guaranty fund that protects annuity owners if an insurance company becomes insolvent. The protection limit varies by state but is typically $100,000 to $250,000 per person per company. Before buying an annuity, you can check your state's insurance department website to confirm the protection level and verify that the insurance company is licensed and in good standing.