Annuity Calculator
Values a stream of equal payments: what it builds up to, and what it is worth as a lump sum today.
Future value
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Share sends a link that reopens these numbers. Copy details pastes the full breakdown as a list.
Present value —
Total paid in —
Interest in the future value —
The formula
FV = PMT × ((1 + i)^n − 1) ÷ i PV = PMT × (1 − (1 + i)^−n) ÷ i
Both are the sum of a geometric series. Payments at the start of each period earn one extra period of interest.
What to watch out for
Future value suits regular saving. Present value suits comparing a pension or a prize paid in instalments against a lump sum.
Frequently Asked Questions
What is the present value of an annuity?
The lump sum today that could fund the same payments at the given rate. A higher rate makes it smaller.
What is an annuity due?
An annuity paid at the start of each period, like rent. It is worth one period of interest more than one paid at the end.