Move the sliders to set what you start with, what you add each month, the yearly return, and how long you keep at it. The chart splits the result into the money you put in and the interest it earned.
Balance at the end
You put in
Interest earned
| Year | You put in | Interest | Balance |
|---|
The assumptions. Interest compounds monthly at one twelfth of the yearly rate, and each deposit lands at the end of the month. Real returns move around, and this ignores taxes and inflation, so treat it as a sketch of the shape rather than a promise.