How a Single Premium Immediate Annuity Works

What a SPIA annuity is and how it works

A Single Premium when ready Annuity (SPIA) is a contract between you and an insurance company where you give them a lump sum of money right now, and they send you regular payments for the rest of your life — or for a set number of years, depending on the contract you choose. You buy it with one payment (the "single premium"), and the payments start within a few months (the "when ready" part).

The insurance company takes your lump sum, invests it, and calculates how much they can pay you each month based on your age, life expectancy, current interest rates, and the payout option you select. Once you buy the contract, the amount of your monthly payment stays the same for as long as you receive it — it does not change with inflation or market performance.

SPIAs are different from other annuities because you do not have a growth phase where your money sits and compounds. You are not waiting for a future date to start withdrawals. You hand over the money and the payments begin almost when ready, which is why they appeal to people who need income now rather than later.

Key Takeaways

• You give an insurance company a lump sum once, and they send you fixed monthly payments for life or a chosen period.
• Payments start within a few months of purchase, making SPIAs useful for people who need income right away.
• Your monthly payment amount is locked in and does not change, regardless of inflation or how markets perform.
• The amount you receive each month depends on your age, gender, interest rates at the time of purchase, and which payout option you choose.
• Money you put into a SPIA is no longer yours to access or leave to heirs unless you choose a payout option that includes a survivor benefit.

How much you receive each month

The monthly payment from a SPIA is calculated using a formula that accounts for your age, your life expectancy, current interest rates, and the payout structure you select. Older people generally receive higher monthly payments because the insurance company expects to pay them for fewer years. A 75-year-old buying a SPIA will receive more per month than a 65-year-old who puts in the same lump sum.

Interest rates at the time you purchase also matter significantly. When interest rates are higher, insurance companies can pay you more each month because they earn more on the money you give them. When rates are lower, your monthly payment is smaller. This means two people buying identical SPIAs at different times may receive very different amounts.

The payout option you choose also changes your monthly amount. If you choose a "life only" payout, your payment is highest because the insurance company only has to pay you — if you die, they keep any remaining money. If you choose a payout that includes a survivor benefit (so your spouse or heirs receive payments after you die), your monthly amount is lower because the insurance company expects to pay longer.

Payout options: life only, period certain, and joint survivor

When you buy a SPIA, you choose how the insurance company will distribute your payments. The main options are:

Life only: You receive a payment every month for as long as you live. When you die, payments stop and the insurance company keeps any remaining balance. This option pays the most per month because the insurance company's obligation ends at your death.

Life with period certain: You receive payments for life, but the insurance company guarantees a minimum number of years of payments (often 10, 15, or 20 years). If you die before that period ends, your beneficiary receives the remaining payments. This option pays less per month than life only, but protects against dying shortly after purchase.

Joint and survivor: Payments continue to your spouse or named beneficiary after you die, usually at the same amount or a reduced amount (like 50% or 75% of what you were receiving). This option pays the least per month because the insurance company expects to pay for two lifetimes.

Tax treatment of SPIA payments

How much of your SPIA payment is taxed as income depends on whether you bought it with pre-tax money (like funds from a traditional IRA or 401(k)) or after-tax money (like savings from a taxable account).

If you bought the SPIA with pre-tax retirement account money, the entire payment is taxed as ordinary income in the year you receive it. If you bought it with after-tax money, only a portion of each payment is taxed — the part that represents earnings on your original investment. The IRS calls this the "exclusion ratio," and it is calculated based on your original investment, your life expectancy at purchase, and how much total you are expected to receive over your lifetime.

Your insurance company will send you a 1099-R form each year showing how much of your payments is taxable. You report this on your tax return. The tax treatment does not change year to year, even if you live longer than expected — the exclusion ratio stays the same for the life of the contract.

Advantages of a SPIA

SPIAs provide income you cannot outlive. Once you buy the contract, you are may provide to receive your payment every month for as long as you live (or for the period you selected), regardless of how long you live or how markets perform. This removes longevity risk — the fear of running out of money in old age.

The payment is predictable and stable. You know exactly how much will arrive each month, which makes budgeting straightforward. Unlike investment accounts, your SPIA payment does not fluctuate with stock market performance or interest rate changes.

SPIAs are straightforward to understand and require no active management. You do not choose investments, rebalance a portfolio, or make decisions about when to withdraw money. The insurance company handles everything.

For people who need income when ready, SPIAs start payments within months rather than requiring a long accumulation phase. This makes them useful for people who have just retired or received a lump sum and need to convert it to regular income right away.

Disadvantages and trade-offs of a SPIA

Once you buy a SPIA, you cannot change your mind or access the lump sum you paid. The money is gone — you own a stream of payments, not the underlying capital. If you need a large sum for an emergency, you cannot get it from your SPIA.

Your payment does not adjust for inflation. If you buy a SPIA that pays $2,000 per month, it will still pay $2,000 per month 20 years later, even though $2,000 will buy much less. Some SPIAs offer inflation-adjusted payments, but these start lower and grow over time, which is a different trade-off.

If you die shortly after buying the SPIA, you may receive far less in total payments than you paid in premiums — unless you chose a payout option with a survivor benefit or period certain. With a life-only SPIA, if you die at 66 after buying at 65, the insurance company keeps the rest.

SPIAs are illiquid. You cannot sell the contract or transfer it to someone else (with rare exceptions). You are locked in for life.

SPIA vs. other ways to turn savings into income

A SPIA is one way to convert a lump sum into regular payments, but it is not the only way. Some alternatives include:

Systematic withdrawals from an investment account: You keep your money invested and withdraw a set amount each month or year. This gives you flexibility and access to your capital, but you bear the investment risk and the risk of running out of money if you live very long or markets perform poorly.

Dividend-paying stocks or bonds: You invest your lump sum in securities that pay regular income. You keep control of the money and can adjust your strategy, but you have no may provide of income and no protection against longevity.

Deferred income annuities (DIAs): Similar to a SPIA, but you buy it now and payments do not start until a future date (like age 80 or 85). This costs less upfront but requires you to wait for income.

Combination approach: Some people buy a SPIA to cover essential expenses (like housing and utilities) and keep the rest of their money invested for flexibility and growth. This balances may provide income with access and upside potential.

Frequently Asked Questions

Can I get my money back if I change my mind after buying a SPIA?

No. Once the contract is issued and the initial payment period has passed (usually 30 to 60 days), you cannot cancel it or recover your lump sum. Some states have a "free look" period of a few days where you can return the contract, but after that, you are committed. This is why it is important to be certain before you buy.

What happens to my SPIA if the insurance company goes out of business?

Each state has a guaranty fund that protects annuity holders if an insurance company fails. The coverage limit varies by state but is typically $250,000 per person per company. If your SPIA is larger than your state's limit, the excess may not be protected. You can research your state's guaranty fund before buying.

Can I buy a SPIA with money from a 401(k) or IRA?

Yes. You can use funds from a traditional IRA, Roth IRA, 401(k), or other retirement account to buy a SPIA. The tax treatment depends on the account type — pre-tax accounts result in fully taxable payments, while Roth accounts may have different rules. Some retirement plans require you to take a distribution first before buying an annuity outside the plan.

Does inflation protection cost extra?

Yes. A SPIA with payments that increase each year to keep pace with inflation will have a lower starting payment than a standard SPIA. The trade-off is lower income now in exchange for income that grows later. The exact cost depends on the inflation rate you choose and the insurance company's pricing.

What if I live much longer than expected?

That is the main advantage of a SPIA. You continue to receive your full payment every month for as long as you live, no matter how long that is. The insurance company bears the longevity risk, not you. If you live to 100, you still receive your payment.