How to calculate ROI on an Australian investment property
Property return on investment (ROI) measures how much profit your property generates relative to the cash you've tied up in it. For Australian investors, a realistic ROI calculation needs to combine rental income, holding costs, negative gearing tax benefits, and long-term capital growth — not just one of them in isolation.
The three numbers that drive property ROI
- Gross rental yield — annual rent ÷ property value. A quick snapshot of income potential before costs.
- Net cash flow — rent minus interest, rates, insurance, strata, property management and maintenance. Tells you whether the property funds itself month-to-month.
- Capital growth — the increase in the property's value over your holding period. Historically the largest contributor to total return on Australian residential property.
Worked example
Imagine buying a $600,000 unit in suburban Brisbane with a 20% deposit ($120,000) plus $30,000 in stamp duty, legal fees and inspections — so $150,000 of cash in. Rent is $550/week ($28,600/year), giving a gross yield of 4.77%. Operating expenses run $6,000/year and interest on the $480,000 loan at 5.5% is $26,400 — leaving pre-tax cash flow of around −$3,800.
On a 30% marginal tax rate, negative gearing returns about $1,140 in tax savings. Over 10 years at 5% capital growth, the property grows to roughly $977,000 — a capital gain of $377,000. Total return: capital gain minus net cash outflows, divided by initial investment. Annualised, that's well above what most term deposits and index funds deliver after tax.
Plug your own numbers into the calculator above to see how changing the purchase price, rent, or growth rate changes your total ROI.
What makes one property's ROI beat another?
- Location and scarcity — suburbs with limited land supply and growing demand tend to outperform on capital growth.
- Purchase price relative to market: buying 5% below market is an instant 5% gain on day one. A good buyer's agent earns their fee here.
- Rental demand — proximity to transport, schools and employment keeps vacancy low and rent rising.
- Loan structure — interest-only periods, offset accounts and fixed vs variable rates all change cash flow.
- Tax position — your marginal tax rate determines how much negative gearing is worth to you.
How accurate is this ROI calculator?
The calculator models the big levers: rental yield, interest cost, operating expenses, negative gearing benefits and compound capital growth. It deliberately simplifies a few things to stay fast and readable — it doesn't model capital gains tax on sale, selling costs, vacancy periods, depreciation schedules, or changing interest rates over the holding period.
It assumes an interest-only loan. The loan balance stays where it starts for the whole holding period, so the figures show interest cost but no principal repayment. If you are on principal and interest, your real cash flow will be worse than the calculator shows, because repayments are higher — but your equity at the end will be better, because every repayment reduces the debt. On a $600,000 property with a $480,000 loan at 5.5% over 10 years, that difference is roughly $84,000 of principal repaid and about $84,000 more equity than the interest-only figures suggest. For a full forecast including CGT and depreciation, pair this with our capital gains tax calculator and depreciation calculator.
Related property calculators
- Suburb research pages: check real sale prices, rents and 10-year growth for the suburb before you run the numbers.
- Rental yield calculator: how gross and net yield are worked out, and what a property returns before the loan.
- Borrowing power calculator — work out your maximum investment loan.
- Stamp duty calculator — factor the largest upfront cost into your ROI.
- Loan repayment calculator — model principal-and-interest versus interest-only.
Common questions
What is property investment ROI (Return on Investment)?
Property investment ROI measures the profitability of a real estate investment relative to its cost. It considers rental income, operating expenses, and capital appreciation over time to provide a percentage return on the initial cash invested.
What is a good ROI on an Australian investment property?
There is no official benchmark. As a general guide, Australian investors often look for a gross rental yield of 4 to 6% alongside long-term capital growth of 4 to 6% a year, which together put annualised total ROI somewhere in the range of 8 to 12%. Treat those as rules of thumb rather than measured figures: what counts as a good return varies by state, asset class and holding period, so run your own numbers through the calculator above rather than aiming at a benchmark.
This ROI calculator is provided for general information only and does not constitute financial, tax or legal advice. Always consult a licensed financial adviser and tax agent before making property investment decisions.