How a SPIA works
A Single Premium Immediate Annuity turns one lump sum into a guaranteed monthly check for life — here is the mechanism, the trade-off, and who it fits.
A SPIA answers one question: how do I turn a pile of savings into a paycheck I can't outlive?
You give an insurance company a single lump sum, and in return it guarantees you a fixed amount every month for as long as you live. The payments usually start about a month later — that's the "immediate" part.
There's no account balance going up and down, no rate to track, no guessing about the market. Just one number, deposited like clockwork.
This guide walks through what a SPIA actually is, the mechanism that lets it pay more than a savings account of equal safety, what stands behind the guarantee, how the immediate version differs from its deferred cousin, what you give up to get it, and the kinds of people it tends to fit.
The short version
- A SPIA converts one lump sum into a fixed monthly check that lasts as long as you live — a paycheck you can't outlive.
- It can pay more than a CD or bond ladder of equal safety because of mortality credits — a real economic engine, not a bonus rate.
- The check is guaranteed by the insurer's reserves, with your state's guaranty association as a backstop; the carrier's financial-strength rating matters more here than on almost any other product.
- In exchange you give up access to the lump sum, and the decision is permanent after a short free-look window.
- GetSure quotes single life with a cash refund by default, so if you die early your heirs receive the premium you hadn't yet collected.
What a SPIA actually is
"Single premium" means you fund it once, with one lump sum. "Immediate" means the income starts right away — typically the next month, and usually within a year.
Put together, a SPIA is the simplest income annuity there is: money in, paycheck out, for life.
What goes in
A single lump sum — often money from a maturing CD or MYGA, an IRA, or savings you no longer want exposed to the market. You choose the amount and how you want to be paid; the insurer quotes one guaranteed monthly figure based on your age, sex, and the payout option you pick.
What comes out
A fixed check, on a set day each month, for as long as you live. It doesn't rise and fall with rates or stocks. It's the closest thing a private individual can buy to an old-fashioned pension — which is why people often call a SPIA a "personal pension."
How the money movesYou hand over one lump sum, it joins a pool of thousands of buyers your age, and the pool pays you a fixed check for the rest of your life.
Because the number is fixed for life, you can size the rest of your retirement around it.
A SPIA is most often used to cover the bills that show up every month no matter what — housing, food, utilities, insurance — so those are paid by a guarantee rather than by drawing down an account that could run dry.
The illustrative figures below show the shape of it: more premium buys a bigger check, and an older buyer gets a bigger check for the same premium, because the income is expected to be paid over fewer years.
| Premium | Age 65 | Age 70 | Age 75 |
|---|---|---|---|
| $100,000 | ~$590/mo | ~$660/mo | ~$760/mo |
| $250,000 | ~$1,475/mo | ~$1,650/mo | ~$1,900/mo |
| $500,000 | ~$2,950/mo | ~$3,300/mo | ~$3,800/mo |
Illustrative only, single-life with a cash refund, for a male buyer as of early 2026. Your exact quote varies by age, sex, state, carrier, and the payout option you choose. See the income your savings could buy →
Why it can out-pay a CD: mortality credits
Here's the part that surprises people. A SPIA can pay you more, each year, than a CD or bond ladder built to be just as safe.
That isn't a marketing trick or a hidden risk — it's a real economic engine that bonds and CDs simply don't have, called mortality credits.
The pool is the whole idea
The insurer collects lump sums from thousands of people your age and promises each one a lifetime check. Statistically, some will die earlier than expected and some later. The money that would have gone to those who die early stays in the pool and helps fund the checks of those who live longer. Every year you're alive, you receive not just your own interest and principal back, but a small share released by the pool — a "mortality credit." That extra share is income a CD can never pay, because a CD only ever returns your own money plus its own interest.
It's worth being plain about what this means, because it's the heart of the product.
With a CD or a bond, you carry the risk of living a long time yourself — your money has to last as long as you do, and if you live to 100 it has to stretch that far.
With a SPIA, you pool that risk with everyone else in your age group, and the pool carries it for you.
The reward for pooling is the mortality credit, and it grows larger the longer you live, exactly when a self-managed pile of savings would be running thinnest.
Where each check comes from, as you ageThe check stays the same size, but what funds it shifts. Early on it's mostly your own money coming back. Once you've outlived your premium, more and more of each check is paid by mortality credits from the pool.
This is why "income" and "growth" are different jobs
A CD or MYGA grows a lump sum and keeps your principal — you can take it all back at the end. A SPIA spends the lump sum to manufacture income you can't outlive, and the mortality credits are what make that income larger than interest alone. They're two tools for two different goals. Grow the money, or turn it into a paycheck →
See it with real numbers
The mechanism is easier to trust once you watch it play out for one person. Here is a single, consistent example carried all the way through — the figures are illustrative, but the shape is exactly how a real SPIA behaves.
Say a 70-year-old puts $250,000 into a single-life SPIA with a cash refund. At early-2026 rates that buys roughly $1,650 a month — about $19,800 a year — guaranteed for the rest of her life.
Illustrative only, for a single hypothetical buyer as of early 2026. Your exact quote depends on your age, sex, state, the carrier, and the payout option. Run your own numbers →
Now put that beside the alternative: keeping the $250,000 and paying yourself the same $1,650 a month out of it.
Paying yourself vs. a SPIA: the year the money runs outDrawing $1,650 a month from the $250,000 herself, the savings run dry around age 83. The SPIA pays the identical $1,650 for as long as she lives — that shaded gap on the right is the longevity risk the pool absorbs.
Until her early 80s the two look the same. The difference is everything after: the self-managed pot can be emptied, and if she lives into her 90s it will be. The SPIA can't be — that is the longevity risk the pool carries for her, funded by the mortality credits.
What "guaranteed for life" rests on
A SPIA makes no market assumption. The monthly amount is written into the contract on day one and doesn't move with interest rates, the stock market, or the economy.
So when people ask what the guarantee actually is, the honest answer is that it's a promise from one insurance company, backed by two things.
The carrier's claims-paying ability
The insurer holds reserves, regulated by the state, specifically to meet promises like yours. Its financial strength is graded by independent agencies — AM Best is the most common — and that rating is a read on how reliably it can pay decades of future checks. Because a SPIA is a long claim on one company's balance sheet, the carrier's rating matters more here than on almost any other product.
The state guaranty association
Every state runs a guaranty association funded by the insurers licensed there. If a carrier fails, the association covers the present value of your remaining annuity payments, up to a per-person limit set by your state. It's a backstop, not the first line — the carrier's own strength is. See your state's coverage limit →
GetSure shows each carrier's AM Best rating right on the quote as a transparency badge. It's there to inform the choice, not to gate it — you see the strength behind every number before you decide.
Immediate vs deferred (DIA) start
The "immediate" in SPIA refers to when the income begins. There's a close cousin that works the same way but starts the checks years later — a Deferred Income Annuity (DIA), sometimes called a longevity annuity.
The only structural difference is the start date.
| SPIA (immediate) | DIA (deferred) | |
|---|---|---|
| Income starts | ~1 month after you buy | A set future date — often years out |
| Best for | You need the paycheck now | You want a bigger paycheck that begins later |
| Why the check differs | Paid over your full remaining life | Bigger — fewer expected payment years, plus growth before it starts |
The trade-off is straightforward: waiting buys a larger check, because the insurer holds your money longer and expects to pay it over fewer years.
A 65-year-old who buys a SPIA gets income next month; a 65-year-old who buys a DIA to start at 80 gets a much larger monthly amount, but nothing in between.
A SPIA is the right tool when the income need is now. The rest of this guide is about the immediate version.
What you give up
The higher, lifelong income has a price, and it's worth stating plainly rather than burying it. In exchange for the guarantee, you give up access to the lump sum.
The principal is no longer yours to spend
You've converted it into an income stream. You can't call the insurer and ask for the lump back, and you can't take a big one-off withdrawal for a new roof or a car. The check is what you have. This is the core trade for the higher payout.
The decision is permanent
After a short state-mandated free-look window (commonly 10 to 30 days) the contract is locked. That irreversibility is exactly what lets the insurer promise a check for life — it can plan around money it knows will stay put.
This is the "what if I die early?" worry, and it's a fair one. With a plain life-only payout, if you died a year after buying, the income would simply stop and nothing would pass to your heirs.
That's why GetSure's default isn't life-only.
The cash-refund default protects your heirs
GetSure quotes single life with a cash refund by default. It pays the highest income of any option that still protects your heirs: if you die before the checks have added up to what you paid in, your beneficiary receives the remaining balance as a lump sum. You can't outlive the income, and your family can't lose the unpaid portion of your premium. It neutralizes the early-death case while keeping the payout high. Compare every payout option →
There's one more trade worth naming, because it's easy to miss at signing: a plain SPIA check is fixed in dollars. It doesn't rise with the cost of living.
A fixed check loses purchasing power to inflation
$1,650 a month buys less in 20 years than it does today. That's the real cost of the "fixed" in a level SPIA, and it's a fair reason not to annuitize every dollar. Common ways to blunt it: cover only your essential bills with the SPIA and keep the rest of your money growing, add a cost-of-living increase option that steps the check up each year (it starts lower in exchange), or buy in stages over time. How SPIAs and inflation interact →
How you actually buy one
Buying a SPIA is closer to setting up a pension than opening a brokerage account. There's no ongoing management — you make a handful of decisions once, fund it, and the checks begin.
Where the lump sum usually comes from
The premium is one payment, and it can come from money you already hold. The source matters mostly for taxes.
| Funding source | How it moves in | Tax note |
|---|---|---|
| A maturing CD or MYGA | Cash, once it matures | After-tax money — only the interest portion of each check is taxed |
| An IRA or old 401(k) | A direct transfer or rollover | Qualified money — every dollar of each check is taxable, like any IRA withdrawal |
| Another annuity | A 1035 exchange (no tax at transfer) | Carries its existing tax character over |
| Ordinary savings | Cash or wire | After-tax money — the exclusion ratio makes part of each check tax-free |
How each check is taxed hinges on whether the money is qualified (IRA) or non-qualified (after-tax). SPIA taxation, in plain English →
The steps, start to first check
What to ask before you commit
A SPIA is permanent once the free-look passes, so the questions below are worth settling before you sign — not after.
What is the carrier's AM Best rating, and how does it compare with the other quotes? This is a decades-long promise from one company.
Exactly which payout option is this quote — and what does the same premium buy under the others? A small income gap can buy a large jump in protection.
If you die early, what do your heirs receive — a lump-sum refund, continued checks, or nothing? Confirm the beneficiary is named the way you want.
Is the check level or increasing? A level check is larger today; a cost-of-living option starts smaller but rises to fight inflation.
Are you annuitizing the right amount? Most buyers use a slice to cover essential bills and keep the rest liquid — you don't have to commit everything.
How long is the free-look window in your state, and when does it start? That's your one chance to unwind the decision.
You don't have to time the rate market perfectly
SPIA payouts move with interest rates, so a quote is a snapshot of today's rates locked in for life. Waiting for a higher rate also means months with no income, and no guarantee that rates will rise. Many buyers who want to hedge the timing buy in stages — a portion now, more later — rather than trying to call the top. A quote costs nothing and shows exactly where today's numbers stand. See today's income estimate →
Who a SPIA fits
A SPIA isn't for every dollar or every saver. It fits a specific job: turning money you don't need as a lump into income you can't outlive. A few real situations make that concrete.
The 68-year-old who wants a private pension
Retired without a traditional pension, with savings sitting in CDs. Uses a slice to buy a guaranteed monthly check that covers the fixed bills, so the rest of the portfolio can stay invested without being the thing that pays the light bill.
The couple covering essential expenses
Wants the floor under their budget — mortgage or rent, utilities, insurance — paid by a guarantee rather than by selling investments in a down market. A joint payout keeps the income coming as long as either spouse is alive.
The saver who fears outliving their money
Healthy, with longevity in the family, and genuinely worried about running out at 90. A SPIA hands that exact risk to the insurer's pool, and the mortality credits reward the long life they're worried about.
If you might need the lump sum back, or you're chiefly trying to grow money and keep your principal, a SPIA is the wrong tool — a MYGA or a bond ladder fits better.
The SPIA earns its place when the goal is income for life and you're willing to commit the principal to get it.
Frequently asked questions
What does SPIA stand for?
Single Premium Immediate Annuity. "Single premium" means you fund it once with a lump sum; "immediate" means the income starts right away, usually the month after you buy and almost always within a year.
How is a SPIA different from a CD or a MYGA?
A CD or MYGA grows a lump sum at a guaranteed rate and gives the principal back at the end — its job is growth, and you keep your money. A SPIA spends the lump sum to create income you can't outlive — its job is a paycheck, and you give up the principal to get it. Here's the SPIA-vs-MYGA decision in full.
Why can a SPIA pay more than a bond ladder of the same safety?
Mortality credits. A SPIA pools many lives, so the share left behind by people who die earlier than expected helps fund the checks of those who live longer. Every year you're alive you collect a piece of that — income on top of your own interest and principal that a bond, holding only your money, can never pay. A ladder keeps your principal and control; a SPIA trades those for an income that can't run out. SPIA vs a bond ladder, compared.
What happens to my money if I die early?
It depends on the payout option. With a plain life-only payout, the income stops at death and nothing passes on. GetSure's default — single life with a cash refund — protects against this: if you die before the checks have repaid your premium, your beneficiary gets the remaining balance as a lump sum. Joint and period-certain options offer other forms of protection. See how each option handles death.
Can I get the lump sum back if I change my mind?
Only during the free-look window — a short period after purchase, commonly 10 to 30 days depending on your state, when you can cancel and get your premium back. After that, the contract is permanent. The income stream can't be cashed out for a lump, and that irreversibility is the trade that makes the higher lifetime payout possible.
Is the income guaranteed no matter how long I live?
Yes — that's the point of a life payout. The check keeps coming as long as you're alive, whether that's 10 years or 40. It rests on the insurer's claims-paying ability, with your state's guaranty association as a backstop up to its limit. Because it's a decades-long promise from one carrier, that carrier's financial-strength rating is worth checking; GetSure shows the AM Best rating on every quote.
How much income will a SPIA actually pay?
It depends on your premium, age, sex, state, the carrier, and the payout option. As a rough illustration, a 70-year-old man putting in $100,000 might see around $660 a month for life on a single-life cash-refund payout as of early 2026 — but your exact quote varies. Run your own numbers here.
Will the payment keep up with inflation?
A standard SPIA check is fixed — it doesn't rise with prices, so its purchasing power slowly erodes over a long retirement. You can add a cost-of-living option that steps the check up each year (it starts lower in exchange), or cover only your essential bills with the SPIA and keep the rest of your money growing to stay ahead of inflation. How SPIAs and inflation interact.
Should I wait for interest rates to rise before I buy?
SPIA payouts track interest rates, so a higher-rate environment means a bigger check. But waiting has two costs: months with no income, and no guarantee that rates will rise. Rather than trying to time the top, many buyers who want the income now buy in stages — some premium today, more later — which averages out the rate they lock in. A quote is free and shows exactly where today's numbers stand.
Do I have to put in all my savings?
No — and most buyers shouldn't. The common approach is to annuitize just enough to cover your essential monthly bills, so those are paid by a guarantee, and leave the rest invested and liquid for emergencies, one-off costs, and growth. A SPIA is a tool for one job — a reliable income floor — not a home for every dollar.
Is my SPIA income taxed?
It depends on the money you used. With after-tax (non-qualified) money, each check is split by an exclusion ratio into a tax-free return of your principal and a taxable interest portion. With IRA or other qualified money, every dollar of each check is taxable as ordinary income, just like any IRA withdrawal. How SPIA income is taxed, in detail.
See the income your savings could buy
Enter an amount and your age, and we will show the guaranteed monthly check a SPIA could pay — single life with a cash refund, with each carrier's AM Best rating in plain view.
See your income →