The Reserve Bank of Australia recently increased the official cash rate by 25 basis points in February and March 2026, bringing it to 4.10%. This has led most lenders to pass on similar rises to variable mortgage rates.
What do interest rate increases mean for you? The cost of your finance goes up, and your borrowing power comes down due to how lenders assess applications. Overall, a net negative.
Using Brisbane as an example, the impact is compounded by strong house price growth over the past two years. In March 2024, Brisbane's median house price was around $920,000 to $925,000, per Domain and other reports. By March 2026, it has surged to approximately $1.15 million to $1.20 million. PropTrack are reporting a median house price hitting a record $1.203 million in February 2026, and Cotality showing dwelling medians around $1.08 million but houses higher. This represents roughly 25 to 30% growth in median house values over the period, driven by high demand, population inflows, and limited supply in southeast Queensland.
National average new owner-occupier mortgage sizes have risen from around $600,000 to $650,000 in 2024 to approximately $736,000 nationally in recent data, with Queensland closer to $687,000 to $735,000.
Brisbane borrowers often face larger loans due to elevated local prices. For a typical $800,000 mortgage in early 2024, monthly repayments on a 30-year principal and interest variable loan at approximately 6.8% averaged around $5,200.
Today, with rates lower overall, approximately 5.5% average variable, but property prices higher, a comparable borrower might now hold a $1,000,000-plus mortgage. At current rates, repayments on $1,000,000 would be about $5,680 monthly. Significantly higher than two years ago despite the rate relief, due to the larger principal from price appreciation.
In summary, recent rate hikes add pressure. Each 0.25% increase means roughly $150 to $200 extra per month on a $1 million loan. The broader picture for Brisbane is mixed. Lower interest rates than in early 2024, when the cash rate was 4.35% and variables at 6.8%, provide some offset, yet substantial house price increases have driven up borrowing amounts and total repayment burdens for many. Homeowners with equity from the growth may be better positioned, while recent or prospective buyers face tighter affordability amid the dual forces of rising values and renewed rate pressure.
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