See how a starting amount and regular monthly savings grow over time with compound interest. Change any figure and the results update.
Year by year
| Year | Contributed | Interest | Balance |
|---|
How the calculator works
Interest is added every month, at one twelfth of the annual rate. Each monthly contribution goes in at the end of the month and starts earning interest the following month. The results are before tax and inflation, and they assume the same rate every year, which real investments never deliver.
A quick check is the Rule of 72: divide 72 by the annual rate to estimate how many years it takes money to double. At 6%, that is about 12 years.
For a full explanation of how compounding works, and how the same math works against you on debt, read our guide to compound interest.
This calculator is for illustration only and is not financial advice.