How a Single Life Annuity Works and What It Pays

A single life annuity pays you a fixed amount each month for as long as you live, then stops when you die

A single life annuity is a contract with an insurance company where you give them a lump sum of money (usually from a retirement account or pension), and they send you the same payment every month for the rest of your life. The payment amount is calculated based on your age, life expectancy, and current interest rates at the time you buy the annuity. Once you die, the payments stop completely — there is no remaining balance paid to your heirs or estate.

This is the simplest annuity structure and typically pays the highest monthly amount compared to other annuity types, because the insurance company keeps any money left over after you die. The tradeoff is that you receive nothing back if you die shortly after buying the annuity, and your heirs receive nothing.

Key Takeaways

• A single life annuity converts a lump sum into equal monthly payments that last your entire lifetime, with no payments to heirs after death.
• Monthly payments are higher than joint or period-certain annuities because the insurance company retains unused funds after you die.
• The payment amount is locked in when you purchase and does not change, even if inflation rises or interest rates shift.
• You cannot access the original lump sum after purchase — the money belongs to the insurance company and is paid out as your monthly benefit.

How the payment amount is calculated

The insurance company uses three main factors to set your monthly payment: your age at purchase, your sex (in most states), and the current interest rate environment. Older buyers receive higher monthly payments because the company expects to pay out for fewer years. A 75-year-old will receive more per month than a 65-year-old who invests the same lump sum.

Interest rates matter because the insurance company invests your lump sum and uses the expected returns to fund your payments. When interest rates are higher, monthly payments rise. When rates are lower, payments fall. Once you lock in your rate and begin receiving payments, that monthly amount never changes — it is fixed for life, regardless of what happens to interest rates or inflation afterward.

Single life versus other annuity types

A joint and survivor annuity (or joint life annuity) continues paying a surviving spouse or beneficiary after you die, usually at a reduced rate. The monthly payment is lower than a single life annuity because the company expects to pay out longer. A period-certain annuity guarantees payments for a set number of years (such as 10 or 20 years) regardless of whether you are alive, then stops. If you die before the period ends, your heirs receive the remaining payments.

A life annuity with period certain combines both: it pays you for life, but guarantees a minimum payout period (for example, 10 years). If you die in year 3, your heirs receive payments through year 10. This hybrid structure pays less monthly than a pure single life annuity but more than a pure period-certain annuity.

Single life annuities pay the most per month because they carry the most risk for you — if you die young, you receive less total money than you paid in. Other structures shift some of that risk to the insurance company, which is why they pay less.

Tax treatment of single life annuity payments

How much of your monthly payment is taxed depends on where the money came from. If you bought the annuity with pre-tax dollars from a traditional IRA or 401(k), your entire payment is taxed as ordinary income in the year you receive it. If you bought it with after-tax money (such as savings), only the earnings portion is taxed; the part that represents your original contribution returns tax-free.

The IRS uses an exclusion ratio to determine how much of each payment is taxable when the annuity was purchased with mixed pre-tax and after-tax funds. Your financial institution or the insurance company will send you a 1099-R form each January showing how much of the prior year's payments were taxable.

When a single life annuity makes sense

A single life annuity is most useful if you have a long life expectancy, no dependents who rely on your income, and want to eliminate the risk of running out of money in old age. It converts investment risk into longevity risk — you no longer worry about market downturns, but you do benefit if you live longer than average.

It is also useful if you want the highest possible monthly income and do not need to leave money to heirs. Some people use a single life annuity for a portion of their retirement savings (to cover essential expenses like housing and food) while keeping other money invested for flexibility and legacy goals.

Irreversible commitment and liquidity

Once you purchase a single life annuity, you cannot change your mind or get your money back. The lump sum is gone, and you receive only the monthly payments for life. Some insurance companies offer a short window (typically 10 to 30 days) to cancel after purchase, but after that period, the contract is final.

This means you lose access to your principal and cannot adjust if your circumstances change — if you face a major medical expense, need to help a family member, or want to leave a larger inheritance, you cannot tap the annuity. Before purchasing, make sure you have other savings or income sources for unexpected needs.

Inflation and purchasing power

A single life annuity payment is fixed and does not increase with inflation. If you receive $2,000 per month at age 65, you will still receive $2,000 per month at age 85, even though that money buys less. Over 20 years of 3% annual inflation, your purchasing power could drop by roughly half.

Some annuities offer a cost-of-living adjustment (COLA) rider that increases your payment by a set percentage each year (often 2% or 3%), but this reduces your starting payment. You pay for inflation protection upfront by accepting a lower initial monthly amount. Without a COLA rider, a single life annuity is best suited for people who have other income sources (such as Social Security) that do adjust for inflation.

Frequently Asked Questions

What happens to my money if I die one year after buying a single life annuity?

The insurance company keeps the remaining balance. You and your heirs receive nothing further. This is why single life annuities pay the highest monthly amount — the company retains all unused funds. If you want your heirs to receive something, you would need a joint and survivor annuity or a period-certain option instead.

Can I change my mind after I buy a single life annuity?

Most insurance companies allow cancellation within 10 to 30 days of purchase (called a free look period), during which you can return the contract and get your money back. After that window closes, the annuity is permanent and cannot be undone. Check your contract for the exact cancellation important date.

Does a single life annuity protect me from market risk?

Yes. Once you own the annuity, your monthly payment does not change based on stock market performance or interest rate movements. The insurance company bears the investment risk. However, you take on longevity risk — if you die young, you receive less total money than you invested.

How is a single life annuity different from Social Security?

Both pay you a fixed amount for life, but Social Security is a government program funded by payroll taxes, while an annuity is a contract with an insurance company funded by your own lump sum. Social Security adjusts for inflation; most annuities do not unless you pay extra for a COLA rider. You can also leave Social Security to a surviving spouse; a single life annuity pays nothing to heirs.

What if I need access to my money before I die?

You cannot withdraw from a single life annuity once it begins paying. Some annuities offer a small death benefit or allow you to name a beneficiary who receives a final payment, but these reduce your monthly amount. If you think you might need access to a lump sum, an annuity is not the right choice — keep that money in a savings account or investment account instead.