Tool 04 · Compound interest
Watch your money grow itself.
Compound interest is the engine behind every other tool here: your returns start earning their own returns. Set a starting sum and a monthly deposit, and see how much of the final pile is money you never put in.
After 25 years
$0
Of which $0 is growth you never deposited.
Final balance
$0
You put in
$0
Interest earned
$0
Interest share
0%
Pro features. Step up deposits, see today's-money value, read insights, and export the full schedule.
Pro
Model it properly
Refine the model
Raise your monthly deposit by this much every year.
Adds a “real value” line so you see what it’s worth in today’s prices.
Year by year
Compare return rates
| Annual return | Final balance | Interest earned |
|---|
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