Ten years early beats thirty years late: the compounding race
Two friends each invest $300 a month at a 7% annual return. The only difference is when they start.
| Invests | Total put in | Value at 65 | |
|---|---|---|---|
| Ava | Ages 25 to 35, then stops | $36,000 | about $391,000 |
| Ben | Ages 35 to 65 | $108,000 | about $351,000 |
Ava put in a third as much and ends up with about $40,000 more. Her money had 30 extra years to compound. By the time Ben starts, Ava's balance is already earning more each year than Ben is contributing.
What it teaches
- Time is the biggest input. In the compounding formula, years are an exponent. Contributions are only a multiplier.
- Starting small beats waiting to start big. $100 a month at 25 often does more than $300 a month at 40.
- It's never too late, but the cost of waiting grows. Ben still built a substantial portfolio. He just had to work three times as hard for it.
The fine print
The 7% return is an assumption, applied smoothly with monthly compounding. Real markets go up and down, and the numbers are in future dollars, before inflation. The lesson holds even with lower returns: the earlier dollars have more time to grow.
See how starting age changes your own plan in the Financial Freedom Planner.
Illustrative example: $300 a month, 7% annual return compounded monthly, no fees or taxes. Education only, not financial, tax or investment advice. Numbers are illustrative; check your own situation, or speak with a licensed professional.