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) | ~$356,000 | $208,000 |
| 7% (mid) | ~$451,000 | $208,000 |
| 10% (optimistic) | ~$658,000 | $208,000 |
Investing $200 a week for 20 years means contributing $208,000 of your own money — and at a 7% return, compounding adds an impressive $243,000 on top, growing your balance to around $451,000. That's nearly half a million dollars from a consistent weekly habit, with compounding contributing more than you did. For many Australians earning a solid income, $200 a week invested consistently over 20 years could be the difference between a comfortable retirement and a truly financially free one.
If you invest $200/week for 20 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.