Compound Calculator
See how a balance grows month by month when the gains are reinvested and you keep adding to it.
Compounding gains
Enter what you start with, what you add each month, what you take out each month, how many months, and the return you expect each month. The return is applied to the whole balance every month, including the gains of earlier months and everything you added, which is what compounding means. A withdrawal is taken at the end of each month, after that month's return and contribution.
Balance after =
Balance over time
| Total contributions | Total gains | Total withdrawn | Account balance | |
|---|---|---|---|---|
A planning tool, not a promise. Returns vary from month to month and losing months are normal; a steady monthly return is an assumption you choose, not something the market guarantees.