Australian house prices face a deeper and longer downturn after the Reserve Bank of Australia raised the cash rate to 4.6 per cent on Tuesday.
The decision marks the central bank's fourth rate rise this year, pushing monthly interest repayments for the national average mortgage up by more than $450 since the start of 2026 and lifting borrowing benchmark rates to their highest level in nearly 15 years.
The Reserve Bank of Australia (RBA) indicated that further rate increases could be on the way as board members work to bring inflation back under control.
The cash rate serves as the national benchmark for commercial lending across Australia. As the central bank adjusts borrowing costs, commercial lenders pass the increases on to variable-rate mortgage holders, directly reducing household disposable income across the country.
Borrowing Power and Mortgage Stress
Home buyers have lost $90,000 in borrowing capacity compared to February, according to data from housing research firm Cotality. Tim Lawless, the head researcher at Cotality, told Australian Associated Press (AAP) that while mortgage holders have experienced elevated interest rates in past economic cycles, the current environment presents unique challenges.
Lawless said a combination of tighter household wallets, cost of living pressures and tax tweaks were likely to push the length and depth of the property downturn closer to uncharted territory. "Household indebtedness is much more significant now than it was back in 2011, so households feel the pain of interest rate hikes much more acutely," Lawless said.
When interest rates last reached 4.6 per cent in 2011, average home-owners spent slightly more than one third of their income on servicing their home loan. Today, mortgage servicing consumes more than half of average household income. Lawless noted that the higher servicing burden "just really adds a bit more fuel to this downturn."
Cotality tracks property values and mortgage analytics across capital cities and regional areas in Australia. Mortgage servicing ratios measure the proportion of income allocated to debt payments, serving as a key indicator of household financial stress.
Broadening Price Falls across Markets
National dwelling values dropped 3.1 per cent in the three months to the end of August, according to Cotality figures. The removal of tax concessions for real estate investors in the May federal budget also contributed to the ongoing housing market slide.
Lawless said successive rate hikes were now spreading price declines further down the property ladder into broader market segments. "As interest rates progressively rise, we will see the downturn becoming much more broad-based," Lawless said.
Reserve Bank of Australia governor Michele Bullock signalled that lower property prices are part of how higher interest rates work through the economic system to restrain inflation. Speaking at a post-decision press conference in Sydney, Bullock said: "That sort of affects people's wealth, it affects how they feel, it might affect the share market again... so that can affect consumption."
Construction Costs and Long-Term Affordability
Higher borrowing costs are also making residential construction more expensive and less financially viable for developers, restricting the future flow of new housing supply.
Nerida Conisbee, chief economist at real estate group Ray White, told AAP that constrained supply will create long-term pricing pressures. "Even if (housing) affordability is improving now... longer term it's likely to lead to more expensive housing," Conisbee said.
Conisbee warned that rising input expenses will continue to filter into construction quotes across the industry. "The cost of (builders') materials is going to continue to increase rapidly, fuel is going to increase rapidly, then they start to price that into quotes," Conisbee said.
