Estimate annuity growth or required periodic payments using time-value math.
Overview
Annuities convert a stream of contributions or payouts into a structured future value. Whether you are accumulating funds or estimating income, timing and interest assumptions drive the result.
This calculator supports ordinary annuity and annuity-due style planning so you can compare payment timing differences. It is useful for retirement income planning and contract evaluation.
Always compare calculator estimates with your actual annuity contract terms, including fees, riders, surrender periods, and insurer-specific crediting methods.
Steps
Select future value, present value, or payment mode.
Use periodic contribution or withdrawal amount.
Match the rate to payment frequency.
Enter months or years as required.
Choose end-of-period or beginning-of-period payments.
Test rate and term changes before decisions.
Math
FV(ordinary) = PMT[(1+r)^n - 1]/r; annuity due multiplies by (1+r)
An annuity sums a sequence of equal payments with compounding. Payments made at the beginning of each period grow one extra period compared with end-of-period payments.
Worked cases
Apply ordinary annuity future value formula
Shows long-run growth from consistent monthly deposits.
Multiply ordinary annuity result by (1+r) for annuity due
Beginning-of-period payments produce a higher ending value.
Rearrange annuity formula to solve for PMT
Returns monthly saving requirement to hit the target.
Why use this
Questions