Adjust your contributions, time horizon, and expected return to watch compound interest do the heavy lifting. Every number updates live.
| Period | Contributed | Total in | Interest | Total interest | Balance |
|---|
Less than most people expect. At a 7 percent annual return, moving from annual to monthly compounding changes the ending balance by well under one percent. How much you contribute, and for how long, matters far more.
A common reference point is the long run average of a broad stock index, roughly 10 percent before inflation and about 7 percent after it. Lower assumptions are safer for planning, since real returns vary widely from year to year.
A balance decades from now buys less than the same amount today. The inflation adjusted figure restates your ending balance in what it would be worth in current dollars, which is usually the more useful number to plan against.
Yes. Add the match into your contribution amount, since it compounds exactly like your own money. A match is an immediate return that no market assumption can beat.
How this works: balances are simulated month by month. Your chosen compounding frequency sets the effective monthly growth rate, and contributions are added at the end of each period. Results are estimates for planning and education only. Real returns vary year to year and are not guaranteed. This is not financial advice.