Compound Interest Calculator
Compound Interest Calculator
Estimate future value, regular deposits or withdrawals, inflation, tax and fees. Share the result, download a table, or copy an Excel formula.
Outputs
Results
Enter your numbers and click calculate.
Year-by-year table
A yearly summary of balance, contributions and interest.
| Year | Deposits | Withdrawals | Interest | Tax / fees | End balance |
|---|
What if I start 5 years earlier?
Calculate to see the comparison.
Simple vs compound interest
Calculate to see the comparison.
Excel formula
Copy a formula based on your current inputs.
=FV(...)Growth chart
Visualise how your balance builds from the starting amount plus accrued interest.
Month-by-month table
Click a year to expand the monthly breakdown.
Guide
How to use this compound interest calculator
Enter your starting amount, annual interest rate and time period, then choose how often the interest is compounded. You can also add regular deposits or withdrawals, inflation, tax and annual fees.
The results include a final balance, total contributions, interest earned, a yearly table, a month-by-month breakdown and a growth chart. Use the share URL to save the calculation or send it to someone else.
Compound interest formula
The standard formula is A = P(1 + r/n)nt, where P is the starting amount, r is the annual rate, n is the number of compounding periods per year, and t is the number of years.
For regular deposits, the calculator works month by month so that different contribution frequencies, timing, inflation and fees can be handled more clearly.
FAQ