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$20,000 invested at 3% for 40 years

Future value

$65,241

Interest earned

$45,241

Total growth

226.204%

Investing $20,000 at 3% compounded annually for 40 years grows to $65,241. That's $45,241 of compound interest earned on your original $20,000.

FV = $20,000 × (1 + 3%)^40

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