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) | ~$31,000 | $24,000 |
| 7% (mid) | ~$35,000 | $24,000 |
| 10% (optimistic) | ~$41,000 | $24,000 |
Investing $200 a month for 10 years means contributing $24,000 of your own money — and at a 7% return, compounding adds around $11,000 on top, growing your balance to roughly $35,000. Ten years is a solid start at this level, turning a manageable monthly commitment into a meaningful savings foundation. The real acceleration happens if you keep going — extending to 20 years would triple your result to over $100,000.
For Australians, $200 a month is a very achievable starting point for regular investing outside of superannuation — around $50 a week redirected into a low-cost ETF like VAS or VGS. At a 7% average annual return broadly in line with long-run ASX and global index performance, your $24,000 in contributions grows to around $35,000 over 10 years. Ten years is a solid foundation — the habit and the portfolio both matter here. The real compounding power emerges when you extend to 20 or 30 years, where the same $200 a month builds a six-figure sum. Tools like Sharesight make it easy to track your actual returns against these projections from day one.
Ten years builds the habit. The numbers get compelling when you extend the timeline. Here's how $200 a month plays out at a 7% return:
| Time period | Total contributed | Final balance (7%) | Growth from compounding |
|---|---|---|---|
| 10 years | $24,000 | ~$35,000 | ~$11,000 |
| 20 years | $48,000 | ~$104,000 | ~$56,000 |
| 30 years | $72,000 | ~$244,000 | ~$172,000 |
Contributions triple from 10 to 30 years, but compounding growth jumps from $11,000 to $172,000. That's why staying invested long term is the single biggest lever available to you.
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.