How to Calculate ROI on an Investment Property (Australian Guide)
Return on Investment (ROI) is the single most important number for comparing your property against other investments — shares, ETFs, term deposits, business interests. Yet most Australian investors only ever look at yield, which understates property's true return. Here's how to calculate proper ROI on a residential investment property.
The ROI formula every property investor should know
Property ROI is the total annual return as a percentage of the cash you actually invested. Unlike yield, it captures everything you gained — not just rent.
Annual ROI (%) = (Annual Cash Flow + Annual Principal Repaid + Annual Capital Growth) ÷ Total Cash Invested × 100Three components:
- Annual Cash Flow: net rent minus expenses minus loan repayments. Can be negative.
- Annual Principal Repaid: each loan repayment includes principal — that's equity building up in your favour, even if it doesn't hit your bank account.
- Annual Capital Growth: the increase in property value. Subjective — use a conservative assumption.
Total Cash Invested = Deposit + Stamp Duty + Legal Fees + Other Acquisition Costs. The bank's loan portion is excluded — it isn't your cash.
Worked example
A $700,000 Brisbane house with a 20% deposit ($140,000) plus $25,000 of acquisition costs. Loan of $560,000 at 6.2% over 30 years. Weekly rent $560.
- Total Cash Invested: $165,000
- Annual Effective Rent (after 2% vacancy): $28,532
- Annual Expenses: $9,000
- Annual Debt Service: ~$41,200
- Annual Cash Flow: $28,532 − $9,000 − $41,200 = −$21,668 (negative)
- Annual Principal Repaid (year 1): ~$6,800
- Capital Growth at 4%: $28,000
- Total Return: −$21,668 + $6,800 + $28,000 = $13,132
- ROI: $13,132 ÷ $165,000 = 7.96%
Negative cash flow but positive 8% ROI — that's the textbook capital-growth play. Our property ROI calculator Australia investors use does this maths instantly and shows you the breakdown by component.
Why ROI beats yield as a single metric
Yield treats every property the same regardless of leverage. But residential property is overwhelmingly purchased with leverage. ROI uses the actual cash-at-risk denominator, which is what matters for comparison against shares (no leverage), ETFs, or any other liquid investment.
ROI vs Cash-on-Cash vs IRR
Three closely related metrics, often confused:
- Cash-on-Cash: only the cash component (cash flow ÷ cash invested). Useful for income-focused investors. Year-by-year, no growth assumption.
- ROI (annual): adds principal repaid and capital growth. Single-year snapshot.
- IRR (internal rate of return): the annualised return over the entire holding period, including the final sale. The most complete number — and the hardest to compute by hand. Our calculator computes IRR automatically.
What's a good property ROI in Australia?
Over a 10-year horizon, Australian residential property has historically returned 8–11% IRR on a leveraged basis (across capital cities). Anything above 10% is genuinely strong; anything below 7% is hard to justify versus a diversified ETF portfolio.
Frequently asked questions
Should ROI include tax effects?+
Pre-tax ROI is the standard comparison number. After-tax ROI is more accurate for your personal situation — but it depends on your marginal rate and whether you're negatively geared. Calculate both if you can.
Why does my ROI fall over time?+
Counter-intuitively, ROI as a percentage often declines as the property appreciates — because the equity base grows. Many investors use 'return on equity' instead once they've held a property for 5+ years.
Is property ROI better than ETFs?+
Sometimes yes, sometimes no. The leverage in property amplifies returns (and losses), so the comparison only makes sense on a risk-adjusted, leverage-adjusted basis. ETFs win on liquidity, diversification and management cost; property wins on tax treatment, control, and leverage tolerance.