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$10,000 invested at 4% for 40 years

Future value

$48,010

Interest earned

$38,010

Total growth

380.102%

Investing $10,000 at 4% compounded annually for 40 years grows to $48,010. That's $38,010 of compound interest earned on your original $10,000.

FV = $10,000 × (1 + 4%)^40

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