Compound Interest Calculator
Compound interest growth with contributions and adjustable frequency.
Investment details
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Growth summary
Final balance
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Total contributed—
Interest earned—
ROI—
Year-by-year growth
| Year | Balance | Contributed | Interest |
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The power of compound interest
Compound interest grows exponentially because each period you earn interest on your accumulated interest. The key drivers are rate, compounding frequency, and time. Starting early — even with small amounts — outperforms larger amounts started later.