Calculator
Compound interest calculator
See how balance, contributions, time, and return rate interact — and why starting early usually matters more than starting with a big lump sum.
Rule of thumb
Compound interest calculator
Show why time and consistent contributions matter more than trying to perfectly guess a return. The result is an illustration, not a promise.
Use this to compare starting now, raising monthly contributions, or waiting a few years.
Estimated future value$0
Total contributed$0
Estimated growth$0
Growth comes mostly from time, not contribution size. The estimated growth row shows how much the return assumption is doing versus what you put in.