Annuity Payout Calculator
The fixed monthly payout that drains a lump sum to zero over a chosen number of years.
Every calculation runs locally in your browser. Real annuities carry fees and guarantees not modeled here, and investment returns vary year to year — this assumes a constant rate. Not financial advice.
Fixed monthly payout
$3,300
for 20 years, then the balance reaches zero
Total withdrawn
$791,947
Interest earned along the way
$291,947
For informational and educational purposes only — not financial, investment, or tax advice, and not a substitute for consulting a qualified professional about your specific situation. TrueMeasureKit is not liable for decisions made based on these results. See our Terms of Service.
The mirror image of a loan payment
This solves the same amortization equation as a mortgage or auto loan payment, just pointed the other direction: instead of "what payment retires this loan in N months," it's "what withdrawal drains this balance to exactly zero in N months." Because the balance keeps earning a return while it's being drawn down, the total withdrawn over the payout period is always more than the starting balance — that gap is the interest earned along the way. To instead find how long a balance lasts at a withdrawal amount you pick, see the withdrawal longevity calculator.
Frequently asked questions
What's the difference between an annuity payout and a lump sum?
A lump sum gives you the full balance at once to invest or spend as you choose. An annuity payout converts that balance into fixed periodic payments over a set number of years, trading flexibility for predictable income.
How is the fixed monthly payout calculated?
It solves the annuity formula for the payment that draws the starting balance down to exactly zero by the end of the chosen term, given the assumed rate of return earned on the remaining balance along the way.