Compound interest calculator
Watch your money grow. Add a monthly deposit and see the power of compounding.
See the full schedule
How this calculator works
Compound interest means you earn interest on your interest. The more often interest compounds and the longer you leave it, the faster it grows. Deposits are added at the end of each month.
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Source: Investor.gov (SEC): Compound interest
Figures and rules on this page come from the official and published sources linked above, as of November 2026. People and numbers in the examples are made up to explain the idea. This page is general information, not tax or legal advice for your situation, and laws change; check the linked source or ask a licensed CPA before you act.
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