When weighing up renting versus buying, it’s easy to overlook one key factor — opportunity cost. This is the return you miss out on when your money is tied up in a property instead of other investments.
In simple terms, if you use your $100,000 deposit to buy a home, that cash stops earning investment returns. But if you rent instead and invest that same amount, it continues to grow — and that growth can be powerful over time.
Opportunity cost represents the value of the road not taken. For home buyers, it’s the investment return forgone by putting a deposit into real estate rather than, say, index funds or term deposits.
Let’s say you rent a home and invest your deposit instead:
In the first few years, renting and investing may perform slightly better because investment returns compound quickly while avoiding upfront buying costs such as stamp duty and maintenance.
But over time, property equity growth outpaces investment returns, especially if home prices keep rising as they did in 2025 (up 6.1% nationally according to Cotality Market Insights).
By year 7, the homeowner typically pulls ahead — and by year 20, they’re hundreds of thousands ahead thanks to equity and leverage
Several factors can shift the balance:
Renting and investing your deposit can look smarter in the short term, especially if markets are uncertain or you need flexibility. However, if you’re planning to stay for the long term (7 years or more), buying and building equity usually wins — particularly in growth markets like Queensland, where prices continue to trend upward.
In the end, it’s not just about rent versus mortgage payments — it’s about how your money grows over time and where it works hardest for you.