Interest compounds monthly; contributions are added at the end of each month.
Growth by year
| Year | Contributed so far | Interest so far | Balance |
|---|
Why compounding matters
Compound interest pays interest on your interest: each month's growth is calculated on the full balance, contributions and past interest included. The effect is small at first and dramatic over decades — doubling your time horizon far more than doubles the interest earned. This calculator is for illustration; real investment returns vary year to year.