Building an investment portfolio from scratch requires making a series of connected decisions — what to own, how much of each thing, where to hold it, and how to manage it over time. This guide covers each step for Australian investors.
Step 1 — Define Your Investment Goal
Before choosing any asset, be clear on:
- What is the money for? (retirement, house deposit, financial independence, wealth building)
- When do you need it? (time horizon)
- How much risk can you tolerate? (how comfortable are you with short-term losses?)
- How much income vs growth do you need?
These answers determine your appropriate asset allocation — the most important portfolio decision you will make.
Step 2 — Choose Your Asset Allocation
Asset allocation is how you divide your portfolio between growth assets (shares, property) and defensive assets (bonds, cash). A common framework:
| Risk profile | Growth assets | Defensive assets | Suited to |
|---|---|---|---|
| Conservative | 30% | 70% | Short time horizon (<5 years); low risk tolerance |
| Moderately Conservative | 45% | 55% | Medium time horizon; moderate-low risk tolerance |
| Balanced | 60% | 40% | 5–10 year horizon; moderate risk tolerance |
| Growth | 75% | 25% | 10+ year horizon; moderate-high risk tolerance |
| High Growth | 90% | 10% | 15+ year horizon; high risk tolerance |
Step 3 — Decide on Diversification
Within growth assets, diversify across:
- Australian shares: Higher dividend yields, franking credits, AUD income
- International shares: Broader market exposure, reduces Australia-only risk
- Property (REITs): Different return drivers; inflation sensitivity
Within defensive assets, diversify across:
- Australian bonds: Interest income, low correlation with shares
- Cash/term deposits: Capital stable, liquid
Step 4 — Choose Your Investments
Most Australian investors achieve excellent diversification with just 2–4 low-cost ETFs:
Simple two-ETF portfolio
- VAS (Vanguard Australian Shares, 0.07% MER): Australian shares
- VGS (Vanguard International Shares, 0.18% MER): Global shares
- Proportion depends on your preference (e.g., 40% VAS / 60% VGS for a growth investor)
Three-ETF portfolio (adds bonds)
- VAS: Australian shares
- VGS: International shares
- VAF (Vanguard Australian Fixed Interest, 0.20% MER): Bonds/defensive
See Two ETF Portfolio Australia and Three-Fund Portfolio Australia for detailed construction guides.
Step 5 — Choose Your Account Structure
Where you hold investments significantly affects after-tax returns:
| Structure | Tax on earnings | CGT | Best for |
|---|---|---|---|
| Super (accumulation) | 15% | 10% (after 12 months) | Long-term, pre-retirement |
| Super (pension phase) | 0% | 0% | Retired, over 60 |
| Personal name | Marginal rate | 50% discount after 12m | Flexibility, access |
| Joint account | Split income | Split CGT | Couples |
For long-term investing, maximising super is generally tax-efficient. For investments you may need before retirement, personal name accounts provide access.
Step 6 — Open an Account and Invest
For ETF investing:
- Open a brokerage account (SelfWealth, Pearler, CommSec, Nabtrade)
- Transfer funds to your brokerage account
- Search for your chosen ETFs (e.g., VAS on the ASX)
- Place a buy order (market order for immediate execution; limit order for price control)
- Confirm your holdings in your account
Step 7 — Set Up Regular Contributions
Automate regular contributions via:
- Direct debit from salary or savings account
- Calendar reminders to invest monthly or quarterly
- Dividend Reinvestment Plans (DRP) for growth portfolios
Consistent regular contributions (dollar cost averaging) smooth out market timing risk.
Step 8 — Maintain and Rebalance
Review your portfolio annually:
- Has your allocation drifted from target? (Shares grew, now overweight)
- Rebalance by directing new contributions to underweight assets (avoids CGT from selling)
- Review your asset allocation as your time horizon and risk tolerance change
Related Articles
- Asset Allocation Australia
- Diversification Investing Australia
- Two ETF Portfolio Australia
- Three-Fund Portfolio Australia
- Portfolio Rebalancing Australia
- Portfolio hub
Frequently Asked Questions
How many ETFs do you need in a portfolio? Two to four well-chosen, diversified ETFs provide excellent portfolio coverage for most Australian investors. VAS (Australian shares) + VGS (international shares) gives exposure to thousands of companies across Australia and global markets. Adding a bond ETF (VAF) and potentially a REIT ETF (VAP) completes a four-asset diversified portfolio.
How much money do I need to start building an investment portfolio in Australia? There is no minimum — you can start with $500 (enough for one ETF purchase via SelfWealth). A more comfortable starting point is $2,000–$5,000, which allows diversification across 2–3 ETFs without brokerage fees being disproportionate. Micro-investing apps (Raiz, Spaceship) allow starting with $1–$5.
How often should I review my investment portfolio? Quarterly for a brief check; annually for a proper review (rebalancing assessment, allocation review). Avoid daily monitoring — it encourages emotional decision-making and does not improve returns.
This article provides general financial information only. For advice tailored to your situation, speak with a licensed financial adviser through the ASIC financial advisers register or MoneySmart.