Investing $100 a month is a realistic starting point for most Australians. It requires no large lump sum, builds the habit of regular investing, and — given enough time — compounds into a meaningful portfolio. This article shows what $100/month can grow to, which platform to use, and how to start.
What Does $100/Month Invested Look Like Over Time?
At different assumed annual returns (before fees, before tax — illustrative only):
| Years | 5% return | 7% return | 9% return |
|---|---|---|---|
| 5 | $6,801 | $7,160 | $7,543 |
| 10 | $15,592 | $17,308 | $19,293 |
| 15 | $26,840 | $32,090 | $38,571 |
| 20 | $41,103 | $52,397 | $67,290 |
| 25 | $59,041 | $81,007 | $112,112 |
| 30 | $81,870 | $121,997 | $183,074 |
Assumes contributions at start of each month. Illustrative only — actual returns vary. Past performance is not a reliable indicator of future performance. Does not account for fees, tax, or inflation.
Starting 10 years earlier (at 25 vs 35) with the same $100/month at 7% return:
- Start at 25: $121,997 by age 55
- Start at 35: $52,397 by age 55
Time is the most powerful variable — starting earlier matters far more than the amount.
The Best Way to Invest $100/Month in Australia
Option 1: Micro-investing app (Raiz or Spaceship)
- Minimum: $1–$5
- Automation: Set weekly $25 deposits, or use Raiz round-ups
- Cost: $36–$42/year flat fee
- Best for: Absolute beginners; those who want zero friction
At $100/month into Raiz: the $3.50/month fee represents 3.5% of contributions — high, but manageable if you stay invested for 5+ years and the balance grows.
Option 2: CommSec Pocket
- Minimum: $50 per transaction
- Automation: Manual
- Cost: $2 per transaction × 12 = $24/year
- Best for: Those comfortable making manual monthly deposits; slightly cheaper than Raiz
Option 3: ETF via brokerage (quarterly lump sum)
- Save $100/month → invest $300 quarterly via SelfWealth
- Brokerage cost: $9.50/quarter = $38/year
- ETF MER: 0.07% (VAS) = very low
- Minimum: $300–$500 per trade
- Best for: Disciplined investors who can save 3 months of contributions before investing
At $100/month, quarterly ETF investing (~$38/year in brokerage) is competitive in cost with Raiz ($42/year). The ETF approach gives you better transparency and lower long-term fees as your balance grows.
What to Invest $100/Month In
For most beginners investing $100/month in Australia:
Simplest approach: Raiz (Aggressive or Moderately Aggressive portfolio) — automated, diversified, minimal effort.
Next step up: CommSec Pocket investing in IOZ (Australian shares, 0.05% MER) or IVV (S&P 500, 0.03% MER) — transparent, low cost, manual.
Graduate to brokerage: When you can invest $500+ per transaction, SelfWealth or Pearler into VAS + VGS is the most cost-effective long-term approach.
The $100/Month Habit: More Important Than Where
The most important variable is consistency. The difference between investing in Raiz vs SelfWealth is relatively minor compared to the difference between:
- Investing $100/month consistently for 20 years
- Investing nothing, or investing sporadically
Choose the platform that removes the most friction and makes you most likely to invest consistently. For many beginners, that is a micro-investing app. For disciplined savers, direct ETF investing may work better.
What Stops Most Australians From Investing $100/Month
Common barriers — and how to overcome them:
| Barrier | Solution |
|---|---|
| “I don’t have $100 spare” | Start with $20–$50 and increase over time |
| “I might need the money” | Keep 1–2 months emergency savings separately first |
| “I don’t know where to start” | Start with Raiz or Spaceship — choose a balanced portfolio |
| “I’m worried about losing money” | Invest only what you can leave for 5+ years; diversify |
| “I’ll start when I have more money” | The cost of waiting is compounding lost — start now with any amount |
Increasing to $200, $500, or $1,000/Month
As income grows, increasing contributions dramatically accelerates outcomes:
| Monthly contribution | 20-year result at 7% | 30-year result at 7% |
|---|---|---|
| $100/month | $52,397 | $121,997 |
| $200/month | $104,794 | $243,994 |
| $500/month | $261,985 | $609,985 |
| $1,000/month | $523,970 | $1,219,971 |
Illustrative compound growth calculations only — actual returns vary significantly.
Related Articles
- Micro-Investing for Beginners Australia
- Raiz Review Australia
- Micro-Investing vs ETFs Australia
- How to Start Investing in Australia
- Micro-Investing hub
Frequently Asked Questions
Is $100 a month enough to invest in Australia? Yes — $100/month is a meaningful starting point. Over 20 years at 7% annual return, it grows to approximately $52,000 (before fees and tax). More importantly, it builds the habit of regular investing, which becomes the foundation for larger contributions as your income grows.
What should I invest $100 a month in as a beginner in Australia? For beginners, a broad Australian share ETF (through Raiz, CommSec Pocket, or a brokerage account) is the simplest, most cost-effective approach. A balanced or growth portfolio in Raiz, or IOZ/IVV in CommSec Pocket, gives instant diversification. General information only — consider your time horizon and risk tolerance.
Is it better to invest $100 now or save more first? Starting with $100/month now is typically better than waiting to save more before starting. Compounding favours time in the market over timing — the earlier you start, the more years your returns have to compound. Even if you increase contributions later, the early years of growth are valuable.
This article provides general financial information only. The projections shown are illustrative only and should not be relied upon as a forecast of actual returns. For advice tailored to your situation, speak with a licensed financial adviser through the ASIC financial advisers register or MoneySmart.