A daily 0.1% return sounds small. On $1,000, the first day's gain is only $1.
But the number changes when that same 0.1% repeats hundreds or thousands of times. The return is not applied only to the original $1,000. It is applied to the money after it has already grown.
The assumption needs to be clear: 0.1% every day is not a weak return. If it repeats for 365 days, it produces roughly a 44% one-year gain. This article uses that steady daily return as a simple simulation to show how much the period changes the result.
The setup is simple: same starting money, same daily return, different periods.
| Period | Days | Final amount | Profit | Multiple |
|---|---|---|---|---|
| 1 year | 365 | about $1,440 | about $440 | 1.44x |
| 3 years | 1,095 | about $2,988 | about $1,988 | 2.99x |
| 5 years | 1,825 | about $6,197 | about $5,197 | 6.20x |
Five years is not five times one year
After one year, the profit is about $440. A simple mental shortcut might make five years feel like about five times that profit.
But compounding does not work that way. After five years, the profit is about $5,197, and the original $1,000 becomes about $6,197.
The reason is that the base keeps changing. On day one, 0.1% is applied to $1,000. After one year, 0.1% is applied to about $1,440. After three years, it is applied to about $2,988. The same percentage creates a larger money gain as the account grows.
So the point is not only the daily return. The point is how long that return repeats. With the same principal and the same return, changing the period from 1 year to 5 years changes the outcome completely.
Real investing does not move in a straight line like this. There can be losing days, fees, taxes, volatility, and changes in contribution size. This is not investment advice. It is a simulation that shows how time changes money in a compound calculation.