What $250,000 Actually Pays You Every Month
Meet Diane. She's 65, just retired, and holding a $250,000 rollover from her 401(k). Her question is simple and her advisor keeps dodging it: if I hand this over, what do I get back every month for the rest of my life?
That's the question this calculator answers. An annuity is a trade. You give an insurer a lump sum. In return, the insurer sends you a fixed check on a schedule for a set number of years or until you die. The size of that check comes down to three levers, and once you see how they move, the whole product stops feeling mysterious.
Lever one: how much you put in. Diane's $250,000 is the engine. Double the principal and you roughly double the payment. There is no magic here, just a bigger pile to draw down.
Lever two: the rate the insurer credits. A higher assumed rate means each payment can lean on growth, not just on returning your own money. At a 5% assumed rate, a 20-year payout on $250,000 lands near $1,650 per month. Drop the rate to 3% and that same 20-year stream falls to roughly $1,386 per month. Same principal, same term, a $264 monthly gap created entirely by the rate.
Lever three: how long the checks last. Stretch Diane's payout from 20 years to 30 and the monthly amount drops, because the pile is spread thinner. At 5%, a 30-year period payout on $250,000 runs closer to $1,342 per month. Shorten it to a 10-year certain payout and the check jumps above $2,650 per month — you're emptying the same bucket faster, so each scoop is bigger.
Here's the part the brochure buries. With a life-only annuity, the insurer is also betting on your age. A 65-year-old gets a larger check than a 55-year-old buying the identical contract, because the insurer expects to make fewer payments. Your age isn't a detail. It's priced into every dollar. Wait until 70 to start, and that same $250,000 can push the monthly figure noticeably higher, because the principal grows untouched and the expected payout window shrinks at both ends.
There's also a timing choice baked into Diane's decision. An immediate annuity starts the checks now — income within roughly a year of writing the deposit. A deferred annuity parks the money, lets it compound for a stretch of years, then turns the income on later at a higher rate. Same lump sum, two very different cash-flow timelines, and the calculator lets you see both before you commit a dollar.
Run your own numbers above and the abstract becomes concrete: this is the income your savings can manufacture, and exactly which lever to pull to change it. Diane stops asking her advisor a question he keeps dodging. She walks in already knowing the answer, and asks the sharper one instead: not what she will get, but which payout option keeps the most of it.