Compound Interest Calculator

Project how a starting balance and monthly contributions grow — see how much is your money versus how much is growth.

Starting amount ($)

Monthly contribution ($)

Expected annual return (%)

Years invested

Projected balance

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Total contributed

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Growth from starting amount

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Growth from contributions

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Educational estimate, not investment advice — a fixed annual return smooths over real market volatility, and it ignores taxes, fees, and inflation, all of which reduce real purchasing power.