Want more scenarios like this? Explore the weekly hub and monthly hub, then run your own numbers in the calculator.
Run 3 return-rate scenarios to see a realistic range of outcomes — then adjust your monthly amount until it fits your budget.
Open the Money Growth Calculator| Return rate | Final balance | Total contributed |
|---|---|---|
| 5% (conservative) | ~$53,000 | $36,000 |
| 7% (mid) | ~$63,000 | $36,000 |
| 10% (optimistic) | ~$83,000 | $36,000 |
Investing $200 a month for 15 years means contributing $36,000 of your own money — and at a 7% return, compounding adds around $27,000 on top, growing your balance to roughly $63,000. Fifteen years at $200 a month nearly doubles your contributions, crossing the $60,000 mark with compounding doing almost as much work as you did. For many Australians this mid-range timeframe represents a realistic savings goal — perhaps from buying a first home to building a secondary investment portfolio.
If $200/month feels hard right now, test a smaller starting amount and increase it each year. Even small step-ups can move the result a lot over long horizons.
It can be. The biggest drivers are consistency and time. Use the calculator to compare multiple return scenarios.
Try 5% (conservative), 7% (mid), and 10% (optimistic) to see a range.
No. Treat results as estimates. You can lower your assumed return rate to be conservative.
If you can’t do both, extra time often helps a lot. Then increase contributions over time.
See /how-compound-interest-works.html.
These pages connect to calculators so you can run your own numbers.