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Compound growth examples

Worked compound-interest examples for the most-searched combinations of starting amount, return rate, and time horizon. Each page shows the year-by-year breakdown, monthly-contribution variants, and the underlying math. To customize freely, use our compound interest calculator.

Featured examples

$10,000 at 7%
over 30 years
$10,000 at 7%
over 20 years
$10,000 at 10%
over 30 years
$5,000 at 7%
over 30 years
$25,000 at 7%
over 30 years
$50,000 at 7%
over 20 years
$100,000 at 7%
over 30 years
$1,000 at 7%
over 40 years
$100,000 at 5%
over 10 years

Browse by starting amount

$1,000at 7% / 30y$5,000at 7% / 30y$10,000at 7% / 30y$25,000at 7% / 30y$50,000at 7% / 30y$100,000at 7% / 30y$250,000at 7% / 30y$500,000at 7% / 30y

Browse by return rate

4%$10K / 30y5%$10K / 30y6%$10K / 30y7%$10K / 30y8%$10K / 30y10%$10K / 30y12%$10K / 30y

Browse by time horizon

5 yrs$10K / 7%10 yrs$10K / 7%15 yrs$10K / 7%20 yrs$10K / 7%25 yrs$10K / 7%30 yrs$10K / 7%

How these are calculated

All examples use standard annual compound interest: A = P × (1 + r)t. Returns assume the rate is constant year over year, which is a simplification for illustration — real-world returns vary annually. For more accurate planning that accounts for inflation, monthly contributions, and tax treatment, run your specific scenario in the compound interest calculator.

For the underlying theory and the four levers that drive compound growth (principal, rate, time, contribution frequency), read the pillar guide: The Beginner's Guide to Compound Interest.