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Compound Interest Calculator

Track exponential growth of your savings and investments over time.

Understanding This Calculator

Compound interest is the eighth wonder of the world. It magnifies savings exponentially, turning modest monthly contributions into substantial nest eggs over a working career.

Core Formula

A = P(1 + r/n)^(nt) + PMT × [((1 + r/n)^(nt) − 1) / (r/n)]

How often should I compound?

Daily compounding yields slightly more than monthly, but the gap is small for most savers. Focus on the rate and consistency of contributions.

Is compound interest taxable?

Interest is taxed as ordinary income unless held in a tax-advantaged account like an IRA or 401(k). Consult a tax professional for your situation.

* All calculations above are theoretical estimates. Actual returns vary based on market performance, fees, taxes, inflation, and economic factors. This tool is for educational purposes only — not financial advice.

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Ads are from third parties. CompoundFig does not endorse advertised products and is not responsible for their claims. Our calculators remain independent educational estimates.