Monthly Compounding Calculator
Monthly Compound Interest Calculator
Calculate growth where interest is compounded monthly, one of the most common ways to model savings and investment growth.
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 this calculator works
Monthly compounding splits the annual rate into 12 compounding periods. It is a useful default for many savings and investment examples because results are easy to compare against regular monthly deposits.
You can still change every input: currency, interest rate, years and months, compounding frequency, contribution timing, inflation and tax or fees. Use the share URL button to save a pre-filled version of the result.
FAQ