Annuity Calculator guide
Annuity Calculator: Future Value of Regular Payments
Use our annuity calculator to work out what a series of regular monthly, quarterly or yearly payments will grow to.
By the AllCalculator editorial teamUpdated 16 October 20261 min read
In finance, an annuity is any series of equal, regular payments. Our Annuity Calculator works out what regular saving grows to.
How to use the calculator (Annuity Calculator)
- Enter any starting amount.
- Enter the regular payment and how often it's paid.
- Enter the annual return and number of years.
- Choose whether payments are at the start or end of each period.
The formula
FV = PMT × ((1 + r)ⁿ − 1) ÷ r
where r is the rate per period and n the number of payments. If payments are made at the start of each period (an annuity due), multiply by (1 + r).
A worked example
With the calculator's default settings, £200 a month for 20 years at 5% a year grows to about £81,161, of which £48,000 is what you paid in.
Frequently asked questions
What's the difference between an ordinary annuity and an annuity due?
An ordinary annuity pays at the end of each period; an annuity due pays at the start, so each payment has slightly longer to grow.
Is this the same as a pension annuity?
No. A pension annuity turns a pot into income. For that, use our Annuity Payout Calculator.
Sources and further reading
Links open official and independent websites in a new tab.
This guide is general information to help you understand your options. It isn't financial, tax, legal or building advice and doesn't take your personal circumstances into account. Figures were checked when the guide was last updated and can change, so confirm anything important with GOV.UK, HMRC, a regulated adviser or a qualified tradesperson.