Compound Interest Calculator
See exactly how your money grows. Enter a starting balance, a monthly contribution, an expected annual return, and a time period — the calculator shows your future value, how much of it is your own contributions, and how much is growth. The math is standard compound-interest; every figure is shown so you can check it.
Results
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Growth by year
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Explained in: How to Invest Your First $1,000 in Index Funds — the article this calculator's math comes from.
Education, not advice: This tool is for education only and is not personalized financial advice. It assumes a constant rate of return, which does not happen in real markets. Investing involves risk, including loss of principal. Past performance does not guarantee future results.