How Annuities Work: Converting Savings Into Guaranteed Income

An annuity turns a lump sum of money into a stream of payments you receive over time

An annuity is a contract between you and an insurance company. You give the company a sum of money — either all at once or over several years — and in return, the company promises to pay you a fixed amount at regular intervals. Those payments can last for a set number of years, for the rest of your life, or for as long as both you and a spouse survive, depending on which type you choose.

The basic function is straightforward: you trade liquidity (access to a large amount of cash) for certainty (a predictable income stream). The insurance company takes on the risk that you will live longer than expected and still owe you money. You take on the risk that you might die sooner and receive less than you paid in. This trade-off is the core of how annuities work.

Key Takeaways

• An annuity converts a lump sum into regular payments, typically monthly or annually, for a period you choose when you buy it.
• The insurance company guarantees the payment amount and timing, which means your income does not fluctuate with market performance.
• You can structure an annuity to pay you for life, for a specific number of years, or to continue paying a surviving spouse after you die.
• Once you buy an annuity, you generally cannot access the full principal again, so annuities work best for money you do not need when ready.

How the payment structure works

When you purchase an annuity, you and the insurance company agree on how long payments will last. A life annuity pays you for as long as you live, no matter how long that is. A term-certain annuity pays for a fixed period — say, 10 or 20 years — and then stops. A joint-and-survivor annuity continues paying your spouse or designated beneficiary after you die.

The payment amount is calculated based on your age, the amount you invest, current interest rates, and life expectancy tables. Younger buyers typically receive smaller monthly payments because the insurance company expects to pay them for longer. Older buyers receive larger monthly payments because the expected payout period is shorter.

You choose the payment frequency when you buy the annuity. Most people receive monthly payments, but some choose quarterly or annual payments instead. The amount stays the same each period unless you selected a variable annuity, which ties payments to investment performance, or an inflation-adjusted annuity, which increases payments over time.

The difference between fixed and variable annuities

A fixed annuity guarantees a specific payment amount for the life of the contract. The insurance company bears the investment risk — they must earn enough on your money to cover the promised payments. Your income is stable and predictable, but it does not increase if markets perform well.

A variable annuity ties your payments to the performance of investment accounts you choose, usually mutual funds. If those investments gain value, your payments increase. If they lose value, your payments decrease. You bear the investment risk instead of the insurance company. Variable annuities offer growth potential but no income certainty.

Some people buy an indexed annuity, which sits between the two. Your payments are tied to the performance of a market index like the S&P 500, but with a floor — your payment will not drop below a may provide minimum, even if the index falls.

When you receive payments and what happens to your money

Most annuities begin payments when ready after you buy them, though some allow you to delay the start date. An when ready annuity starts paying within a month of purchase. A deferred annuity lets you invest money for years before payments begin, which means your principal grows before you start withdrawing it.

Once you buy an annuity, the money you invested becomes the insurance company's asset. You no longer own it outright. In exchange, you own the right to receive the promised payments. If you need access to a large sum before payments begin, most annuities do not allow you to withdraw it without a steep penalty — sometimes 5 to 10 percent of the withdrawal amount, depending on the contract.

If you die before receiving all your money back, what happens depends on your contract. Some annuities pay any remaining balance to your beneficiary. Others pay nothing more — the insurance company keeps the remainder. This is why the type of annuity you choose matters: a life annuity with a period-certain option (for example, "life with 10 years certain") guarantees payments for at least 10 years, so your heirs receive something if you die sooner.

Why people use annuities in retirement planning

Annuities serve a specific purpose: they convert savings into income you cannot outlive. Social Security provides this for most retirees, but it may not be enough. An annuity fills the gap by guaranteeing additional income for life, which reduces the risk that you will run out of money in your 80s or 90s.

Because annuity payments are may provide by the insurance company, not dependent on market performance, they appeal to people who want certainty over growth. A retiree who is anxious about stock market volatility might use part of their savings to buy an annuity, then invest the rest in stocks and bonds. The annuity covers essential expenses, and the investment portfolio covers discretionary spending and leaves room for growth.

Annuities also appeal to people without a pension. Decades ago, many employers offered pensions that paid retirees for life. Today, most offer 401(k)s instead, which shift investment risk to the employee. An annuity mimics the pension structure — it converts a lump sum into lifetime income — which is why some people view it as a way to recreate what pensions used to provide.

The trade-offs of buying an annuity

The main trade-off is liquidity for certainty. Once you buy an annuity, most of your money is locked in. You receive it gradually as payments, not as a lump sum you can access if an emergency arises. If you need a large amount quickly, you cannot straightforward withdraw it without penalties.

Annuities also come with costs. Insurance companies charge fees for managing the contract, and some annuities carry surrender charges if you withdraw money early. These costs reduce the effective return on your investment, which is why the payment amount is lower than it would be if you straightforward invested the money yourself and withdrew it gradually.

Inflation is another consideration. A fixed annuity pays the same amount every month for life, which means the purchasing power of that payment declines over time. A dollar in 20 years buys less than a dollar today. Some annuities offer inflation adjustments, but those come with lower starting payments to offset the future increases.

How annuities fit into a broader retirement strategy

Financial advisors often suggest using annuities for a portion of retirement savings, not all of it. A common approach is to use an annuity to cover essential expenses — housing, food, utilities, insurance — and keep the rest of your savings invested for growth and flexibility. This way, you have may provide income for necessities and a cushion for unexpected costs or opportunities.

The amount to annuitize depends on your situation. Someone with a pension and Social Security might not need an annuity at all. Someone with no pension and modest Social Security might annuitize 30 to 50 percent of their savings. Someone with substantial savings and no other may provide income might annuitize less, relying instead on a withdrawal strategy from their investments.

The timing of purchase also matters. Annuity rates change with interest rates. When interest rates are high, annuities pay more per month because the insurance company can earn more on your money. When rates are low, payments are smaller. Some people wait for rates to rise before buying, while others buy gradually over several years to average out the timing.

Frequently Asked Questions

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

Most annuities have a surrender period, usually 5 to 10 years, during which you can withdraw your money but pay a penalty — often 5 to 10 percent of the amount withdrawn. After the surrender period ends, you can usually withdraw without penalty, but you lose the may provide income stream. Some states require a free-look period of 10 to 30 days after purchase, during which you can cancel and get your full money back.

What happens to my annuity if the insurance company fails?

Each state has a guaranty fund that protects annuity holders if an insurance company becomes insolvent. The protection limit varies by state but is typically $250,000 per person per company. This means your payments are protected up to that amount, though in practice, state funds rarely need to step in because insurance regulators monitor company solvency closely.

Do I pay taxes on annuity payments?

If you bought the annuity with pre-tax money (like from a 401(k) or traditional IRA), the entire payment is taxable as ordinary income. If you bought it with after-tax money, only the earnings portion is taxable — the part of each payment that represents your original investment is returned tax-free. The insurance company will send you a 1099-R form showing how much is taxable.

Is an annuity the same as a pension?

An annuity and a pension both provide may provide lifetime income, but they work differently. A pension is funded and managed by your employer, and you have no control over how it is invested. An annuity is something you buy with your own money from an insurance company. You control the purchase decision, the amount, and the payment structure, but you bear the cost.

Can I buy an annuity inside a retirement account like an IRA?

Yes. You can buy an annuity inside a traditional IRA, Roth IRA, or 401(k). This is called a may have access to annuity. The tax treatment is the same as any other investment in that account — contributions to a traditional IRA are tax-deductible, and withdrawals are taxed as ordinary income. Roth IRA annuities grow tax-free and withdrawals are tax-free in retirement.