Investment Calculator
Updated on 20 Oct 2026 · Checked by Aotob
Investing $500 a month for 25 years could grow to $424,980.
That starts with $10,000 and assumes 7% a year before a 0.5% fee. Returns are not guaranteed and vary from year to year; this is an average.
Value in 25 years
$424,980
A 0.5% yearly fee costs you $37,310 over 25 years, 8.1% of what you would have had.
Show the working
Monthly growth = (7% − 0.5% fee) ÷ 12 = 0.5417%
Each month: balance × (1 + growth) + 500
After 300 months = 424,980
How your $424,980 builds up
Growth by year
| Year | Put in | Growth | Value |
|---|---|---|---|
| 5 | 40,000 | 9,165 | 49,165 |
| 10 | 70,000 | 33,323 | 103,323 |
| 15 | 100,000 | 78,214 | 178,214 |
| 20 | 130,000 | 151,775 | 281,775 |
| 25 | 160,000 | 264,980 | 424,980 |
Questions people ask
What return should I expect?
Over long periods, global stock markets have returned roughly 6% to 8% a year before inflation, with big swings from year to year. Bonds and cash have returned less. This calculator uses one steady average rate.
How much do fees matter?
A lot, over decades. A 1% yearly fee can take a fifth or more of your final balance over 30 years, compared with a low-cost index fund.
Is this before or after tax?
Before tax. Use a tax-free account (like an ISA, TFSA, Roth IRA or super) to keep more of the growth.
Updated 20 Oct 2026Source: compound growth formula; fee impact (SEC investor guide)Checked by AotobAn estimate, not financial adviceReport an issue