Compound Interest Calculator

See what consistent contributions and time really do. Compare two paths side-by-side.

Scenario A

Principal ($)

Monthly contribution ($)

Annual return (%)

Years

Compounding

Apply tax drag

Growth curve

Scenario A balanceContributions only

Year-by-year (Scenario A)

Educational illustration. Real returns vary year-to-year; sequence-of-returns risk is not modeled. Tax drag here is applied as a simple annual percentage on gains.

Compound Interest Calculator

Scenario A

Scenario BRemove

Growth curve

Year-by-year (Scenario A)

Scenario B