Compound Interest

Simulate savings growth with monthly contributions and a chosen constant compounding rate.

Finance

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Initial deposit ($)

Monthly contribution ($)

Annual interest rate (%)

Years

Compound frequency

Final balance

$302,370

Total contributed

$130,000

Total interest

$172,370

Principal vs interest over time

Year 4$40,986

Year 8$81,952

Year 12$136,110

Year 16$207,710

Year 20$302,370

PrincipalInterest

How to Use

1
Enter starting savings and monthly contribution.
2
Set a constant annual rate, years and monthly, quarterly or yearly compounding.
3
Read projected totals and the displayed growth breakdown.

There is no daily-compounding option. The projection assumes a constant rate and the implementation’s contribution timing; fees, tax, inflation and market volatility are not modeled.

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