How to Know If a Property Is a Good Investment (Australian Investor Checklist)

Every week you'll see a property that 'looks like a good deal'. The agent's marketing makes it sound urgent, the photos are flattering, and the open-house crowd is hovering. But is it actually a good investment? This guide gives you an 8-step checklist to cut through the noise — and the exact numbers to plug into our free property investment calculator.

1. Run the cash flow numbers first

Before falling in love with a property, model the cash flow. Will the weekly rent cover the mortgage, council rates, insurance, property management, repairs and body corporate? If the answer is yes, you've got a positively-geared property — increasingly rare in capital cities. If the answer is no (most properties today), you need to be comfortable funding the gap until rents catch up.

Use our free property investment calculator and pay attention to two numbers: Annual Cash Flow and Monthly Cash Flow. A negatively-geared property that costs you $200/week is very different from one that costs $1,200/week.

2. Compare gross and net yield

We covered this in detail in our rental yield guide, but in short: gross yield tells you how the property compares against the market on income alone; net yield tells you what you actually keep. In 2026, anything below ~2.5% net yield in a capital city is increasingly hard to justify without strong growth assumptions.

3. Check the debt coverage ratio (DCR)

DCR is the ratio of net operating income to annual debt service. Banks want to see DCR above 1.25 for investment loans; below 1.0 means the rent doesn't cover the loan repayments.

DCR = Net Operating Income ÷ Annual Debt Service

Our calculator shows this directly. If DCR is below 1.0, your serviceability buffer is thin — interest rate movements or vacancy will hurt.

4. Calculate true ROI (not just yield)

Yield ignores capital growth, principal paid down, and your initial cash outlay (deposit + stamp duty + legals). Return on Investment captures all of it. Our calculator shows a first-year ROI including principal repaid — a much fairer benchmark for comparing two properties.

5. Stress-test interest rates

Most Australian variable rates landed somewhere between 5.8% and 6.6% in early 2026. Model what happens if your rate climbs another 1.5%. If the deal still works, you've built a buffer. If it falls apart, the deal is fragile.

6. Look at supply and demand

Two suburb-level indicators tell you most of what you need to know: vacancy rate and days on market. Under 1.5% vacancy and under 25 days on market suggest a tight rental market and rising rents. Above 3% vacancy and 40+ days on market suggest oversupply and slow value growth.

7. Check infrastructure and growth drivers

Capital growth follows infrastructure, jobs and population. A planned train station, a new hospital, a major employer relocating, or even a new shopping precinct can shift a suburb's trajectory. State infrastructure pipelines (NSW Infrastructure, Building Queensland, etc.) are free to read.

8. Plan your exit before you buy

Most experienced investors think about exit on day one. Are you holding for 10 years? 20? Are you targeting the principal-place-of-residence market on exit, or another investor? Run a DCF over your intended holding period — our calculator does this automatically with year-by-year projections, NPV and IRR.

The investor checklist — distilled

• Positive or manageable negative cash flow? ✓
• Net yield above your minimum threshold (typically 2.5%+)? ✓
• Debt coverage ratio above 1.0 (ideally 1.25)? ✓
• ROI competitive vs other investments? ✓
• Survives a 1.5% rate shock? ✓
• Vacancy <2.5% and days on market <30? ✓
• At least one infrastructure / demand driver? ✓
• 10+ year exit plan with NPV and IRR projected? ✓

Frequently asked questions