Use conservative, mid, and optimistic return assumptions to see a realistic range of outcomes — then decide what’s feasible for your budget.
Open the Money Growth Calculator| Return rate | Final balance | Total contributed |
|---|---|---|
| 5% (conservative) | ~$65,000 | $32,500 |
| 7% (mid) | ~$88,000 | $32,500 |
| 10% (optimistic) | ~$144,000 | $32,500 |
Putting away just $25 a week for 25 years means contributing $32,500 of your own money — less than many people spend on a new car. At a 7% return, compounding adds around $55,500 on top, bringing your total to roughly $88,000. That extra five years compared to a 20-year plan makes a significant difference — your balance grows by around $32,000 more just by staying invested longer. It's a strong case for starting early and letting time do the heavy lifting.
If you invest $25/week for 25 years, the result depends heavily on the return rate. Use the calculator to test a conservative, mid, and optimistic scenario.
It’s a solid starting habit. The best amount is one you can maintain consistently, then increase over time.
Use 5% for a conservative baseline, 7% for a mid-range estimate, and 10% as an optimistic scenario.
No. Treat results as estimates. You can lower your assumed return rate to be more conservative.
For long-term modelling, converting to monthly is usually close enough.
See the simple explanation on /how-compound-interest-works.html.