Future Value of Savings Calculator
See what regular monthly savings plus a starting lump sum grow into over the years.
Recent
Formula
How the calculation works
The initial lump sum grows as one compounded amount, while each monthly deposit grows as a series of payments.
Adding the two gives the future value, and the total deposited is the lump sum plus every monthly deposit.
The interest earned is the future value minus everything you put in, which shows how much of the result came from growth.
Common mistakes
- Using an annual return where the formula expects a monthly rate, which badly overstates the result.
- Assuming the return is fixed: markets move, so treat the future value as an estimate.
When to use it
- Use it to see how a monthly habit plus a starting amount could grow over a set number of years.
- It is not a guarantee; the return you type is an assumption, not a promise.
Worked example
Saving 5,000 a month for 10 years at 10% grows to 1,024,224.89, from 600,000 deposited and 424,224.89 of interest.
Common questions
Is the deposit made at the start or end of the month?
This uses an ordinary annuity, so deposits earn interest from the month after they are made.
Why is the interest so large?
Because each deposit compounds for the remaining months, so early deposits earn far more than later ones.
Related tools
-
Dividend Yield
The yield a dividend pays against today's price, and against what you actually paid for it.
-
Crypto Profit
Profit on a trade from the buy and sell prices, with fees taken off, in money and in percent.
-
FIRE Number
The pot that lets investment income cover your spending for good.
-
Mutual Fund Target
What a fixed monthly investment grows to over a set number of years.
-
Fund and Bond Blend
The blended return and end value of a fund-and-bond mix.
-
Compound Annual Growth Rate (CAGR) Calculator
Find the compound annual growth rate that turns a starting value into an ending value over a set number of years.
-
Crypto Cost Basis HIFO Calculator
Work out the cost basis of a crypto sale under the highest in first out method and what is left in your holdings.
-
Crypto Futures PnL Calculator
Work out the gross and net profit or loss of a leveraged crypto futures trade, including trading fees and the return on your margin.