Australian homeowners are facing another increase in mortgage repayments after the Reserve Bank of Australia raised interest rates to their highest level in 15 years.
The RBA lifted its official cash rate by 0.25 percentage points on Tuesday, September 29, taking it from 4.35 percent to 4.60 percent.
The decision was unanimous and represents the fourth interest rate increase in Australia this year as policymakers continue their battle against persistent inflation.
For millions of Australians who took out mortgages during the period of historically low interest rates, the latest decision pushes borrowing costs into territory they have never previously experienced.
The 4.60 percent cash rate is the highest Australia has recorded since late 2011.
Why did the RBA raise interest rates again?
Inflation remains the central concern.
The Reserve Bank aims to keep inflation within a target range of 2 to 3 percent over time, with policymakers generally seeking to bring inflation toward the midpoint of that range.
But recent figures have remained stubbornly high.
Underlying inflation has been running at approximately 3.6 percent, while headline inflation was 3.5 percent in July.
The RBA has become increasingly concerned that inflation is taking too long to return to target.
Higher energy prices have added another layer of uncertainty, while weak productivity and continued resilience in parts of the Australian economy have complicated the central bank's attempt to cool price pressures.
The continuing conflict in the Middle East has also pushed global oil prices higher, increasing fuel and transport costs and creating additional inflation risks for economies including Australia.
The Reserve Bank signalled that it remains prepared to tighten monetary policy further if inflation fails to ease sufficiently.
How much more could your mortgage cost?
The immediate concern for many Australians is what the RBA rate increase means for monthly mortgage repayments.
Banks typically pass increases in the official cash rate on to customers with variable home loans.
According to calculations reported by ABC News using Canstar data, a borrower with a $600,000 mortgage could pay approximately $91 more every month following the latest 0.25 percentage point increase.
For a $750,000 mortgage, the additional monthly repayment is estimated at approximately $114.
A homeowner with a $1 million mortgage could face an increase of around $152 per month.
But the cumulative impact of this year's rate increases is considerably larger.
For someone with a $600,000 mortgage, the increases during 2026 could now mean approximately $364 more each month in repayments, according to Canstar calculations cited by ABC News.
That works out to roughly $4,368 more per year.
For borrowers already dealing with higher food, energy and household costs, the latest increase could force further reductions in discretionary spending.
Home buyers could also feel the impact
The consequences extend beyond existing mortgage holders.
Higher interest rates reduce the amount banks are generally willing to lend because prospective borrowers must demonstrate they can afford repayments at higher rates.
Canstar estimates cited by ABC News suggest that a person earning the average full time wage of $108,650 could have seen their borrowing capacity reduced by more than $47,000 as rates have increased.
For a couple where both partners earn the average wage, borrowing capacity could be almost $95,000 lower.
That could create further pressure on Australia's housing market, particularly for first time buyers attempting to enter expensive property markets such as Sydney and Melbourne.
Could Australian interest rates rise again?
That is now the major question facing borrowers.
Before Tuesday's decision, most economists expected the RBA to lift rates to 4.60 percent.
Opinions differ more significantly about what happens next.
Financial markets have been pricing in the possibility of additional increases, while some economists believe weakening economic conditions could eventually persuade the Reserve Bank to stop tightening.
Before the September meeting, Commonwealth Bank, Westpac and NAB expected the September increase to be the final rise, while ANZ had forecast another increase in November.
Money markets had taken a more aggressive view, pricing the possibility of at least two additional increases and a chance that Australia's cash rate could eventually move above 5 percent.
The Reserve Bank itself has avoided committing to a predetermined path.
Instead, future decisions will depend heavily on incoming inflation, employment and economic growth figures.
New inflation figures could be crucial
Attention will now quickly shift to Australia's next inflation data.
The Australian Bureau of Statistics is due to release new inflation figures following the RBA decision, giving policymakers another important indication of whether price pressures are easing.
If inflation remains stronger than expected, expectations for another interest rate increase could grow.
If inflation begins falling more decisively while employment and household spending weaken, the argument for keeping rates unchanged could become stronger.
Australian household spending was flat in August at approximately A$82.3 billion after rising strongly in July, according to official data reported by Reuters.
Annual household spending growth nevertheless remained relatively strong at 6.8 percent.
That resilience is one reason policymakers remain cautious about declaring victory over inflation.
Savers could benefit from higher rates
Mortgage holders are not the only Australians affected by the RBA decision.
People with savings accounts and term deposits could benefit if banks pass higher interest rates through to deposit products.
Higher cash rates generally allow financial institutions to offer better returns to savers, although individual banks decide how much of an RBA increase they pass on.
Australians with fixed rate mortgages will also not immediately experience higher repayments while their existing fixed rate period remains in place.
However, borrowers reaching the end of a lower fixed rate period could face significantly higher repayments when refinancing.
Australia enters a new phase of the inflation fight
The latest decision confirms that Australia's battle against inflation is far from over.
The Reserve Bank is attempting to slow demand enough to bring inflation back toward its target without causing an unnecessarily severe downturn in employment and economic activity.
For households, however, that balancing act has an immediate cost.
A 4.60 percent cash rate means borrowing is now more expensive than at any point since 2011, and Australians with large variable mortgages are likely to feel the impact first.
Whether September's increase proves to be the final rate rise of 2026 will depend largely on what happens next with inflation.
For now, Australian borrowers are entering the final months of the year with their mortgage costs climbing once again.
