Annuity Calculator

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Calculate the future or present value of an annuity with regular payments. Supports ordinary annuities and annuities due, with monthly or annual compounding.

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An ordinary annuity pays at the end of each period; an annuity due pays at the start (one extra period of growth). Future value accumulates the payments forward; present value discounts them to today.

About Annuity Calculator

The annuity calculator values a stream of equal payments. Choose future value to see what regular contributions grow into by the end of the term, or present value to find what that payment stream is worth today. Payments can be monthly or annual.

It supports both timing conventions: an ordinary annuity pays at the end of each period, while an annuity due pays at the start, giving every payment one extra period of growth. The results include the total of all payments and either the interest earned (future value) or the growth discounted (present value).

Annuity math sits behind retirement contributions, structured settlements, lease payments and lottery payout choices. This calculator is free and computes everything live in your browser.

How to use Annuity Calculator

  1. Choose what to find: future value or present value.
  2. Enter the payment amount and the annual interest rate.
  3. Set the number of years and the payment frequency (monthly or annually).
  4. Pick the annuity type: ordinary (end of period) or due (start of period).
  5. Read the annuity value, total payments and total interest.

Frequently asked questions

Timing. Ordinary annuities pay at the end of each period; annuities due pay at the beginning. Because each payment compounds one period longer, an annuity due is always worth slightly more.

Use present value to price a stream of incoming payments today — for example, judging whether a lump-sum offer beats years of installments. Use future value to project what regular saving accumulates to.

Monthly payments compound twelve times per year, so the same annual total contributed monthly grows to more than a single annual payment. The tool divides the rate and multiplies the periods accordingly.

The future value minus the sum of all your payments — the portion of the final balance produced purely by compounding rather than by contributions.

No. They assume a constant rate and unbroken payments, so treat them as planning estimates rather than a promise of returns or financial advice.
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