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Compound Interest Calculator

Estimate how a starting balance and regular monthly contributions could grow over time.

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馃 TUTORCALC EXPLAINS

How contributions and compounding interact

Compound growth

Compounding means returns can earn additional returns over time. Regular contributions can be as important as the assumed rate, especially over long periods.

Investment returns are not guaranteed

This is a mathematical projection. Real investments fluctuate and may lose value; fees, taxes and inflation can also change outcomes.

Why compounding matters

Compound growth means returns can earn additional returns over time. The starting balance, contribution amount, rate, compounding frequency, and time horizon all influence the projected ending value.

Use multiple assumptions

Future returns are uncertain. Compare conservative, moderate, and higher-growth assumptions rather than relying on one projected rate, and treat the calculator as a planning tool rather than a prediction.