CALCULATORS / FREE ONLINE TOOL

Compound Interest

Explore how savings could grow over time.

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Use one currency consistently. Fixed rate, monthly compounding, contributions at month-end. Excludes taxes, fees, and inflation.

A little guidance.

Explore a hypothetical savings scenario with an initial balance, monthly contributions, and a fixed annual interest rate compounded monthly. This is an illustration, not a forecast or financial advice.

How it works

  1. Enter an initial amount and optional monthly contribution.
  2. Choose a yearly interest rate and a time period.
  3. See the future balance, contributions, and hypothetical interest.

Good to know.

What assumptions does this use?

Interest compounds monthly at the annual rate divided by 12. Contributions arrive at the end of each month. Taxes, fees, inflation, and changing rates are excluded.