Australia hikes rates to 18-year high as inflation fight intensifies

Australia’s central bank raised its benchmark cash rate by 25 basis points to 4.85% on Tuesday, the highest level since November 2008 and the fifth increase this year, CNBC reported.

The move was a split decision, with six members of the Reserve Bank of Australia’s board voting for the hike and three opting to hold. That divide at the top of the central bank tells you something about the difficulty of the moment. The RBA is tightening into a slowing economy, betting that the inflation fight matters more than the growth risk, and not everyone on the board agrees.

Consumer prices rose 4.3% in the year through September, up from 4% in August and the highest reading since March. The RBA now says inflation will not return to its 2% to 3% target band until late 2027, three quarters later than its previous forecast. The central bank explicitly cited higher fuel and commodity prices from the Iran war, and also pointed to AI-related investment as a factor driving rapid growth in prices for technology-related goods.

The split decision

A 6-3 vote on a rate hike is unusual for a central bank. The RBA’s board is not the Federal Open Market Committee, and dissent at the RBA has historically been rare. The fact that three members wanted to hold suggests a real debate inside the bank about whether the economy can withstand more tightening.

Governor Michele Bullock has been the most hawkish central banker in the developed world this year. In a September speech she said inflation is “too high,” driven by higher oil prices from the Iran war and stronger domestic spending. She added that additional hikes will come “if that’s what’s needed to get inflation down.” The November decision shows she meant it.

The RBA is now an outlier. The Federal Reserve is cutting rates. The European Central Bank is cutting rates. The Bank of England is cutting rates. Australia is hiking, and it is hiking because its inflation problem is getting worse, not better, at a time when most of the rest of the developed world is seeing price pressures ease.

What is driving Australian inflation

The RBA identified two main drivers. The first is the Iran war, which has pushed up fuel and commodity prices. Australia is a net energy importer of refined products, and the disruption to Middle East supply chains has flowed directly into domestic petrol prices. The war-driven component of inflation is a terms-of-trade shock that rate hikes cannot fix, but the RBA is hiking anyway to prevent the shock from feeding into broader inflation expectations.

The second driver is more novel. The RBA said AI-related investment is driving rapid growth in prices for technology-related goods. This is a recognition that the AI capex cycle is not just a story about Nvidia data centers in the United States. The technology investment boom is broadening, and in Australia it is showing up in the inflation data. The RBA did not quantify the AI contribution, but the fact that it named it as a factor in a rate decision is a sign that central banks are starting to think about the inflationary consequences of the AI buildout.

GDP growth has slowed. The economy expanded 2.1% in the June quarter compared with a year earlier, down from 2.5% in the March quarter. The RBA is trying to bring inflation under control while higher borrowing costs and cost-of-living pressures weigh on households. When asked if she sees a recession, Bullock said it is “not our base case at the moment.” That qualifier is doing a lot of work.

The global picture

The RBA’s decision is a reminder that the global rate-cutting cycle is not uniform. The Fed and the ECB are cutting because their inflation numbers have come down. Australia’s have not. The divergence is driven by country-specific shocks: the Iran war hits Australia’s fuel prices harder because of its reliance on imported refined products, and the AI investment cycle is showing up in Australian technology goods prices in a way that it is not yet showing up in the United States or Europe.

The Australian dollar strengthened after the decision, as traders priced in the possibility of further hikes. A higher currency helps import inflation by making foreign goods cheaper in local terms, which is part of the transmission mechanism the RBA is relying on. But it also hurts export competitiveness, and Australia’s mining sector is already dealing with softer commodity demand from China.

The yield on Australian 10-year government bonds rose above 4.9% after the decision, reflecting the market’s view that the RBA will need to keep rates higher for longer. The gap between Australian and US 10-year yields widened to its highest level in over a year, a divergence that makes Australian assets more attractive to global investors but also tightens financial conditions domestically.

What it means for households

Australian mortgage holders are feeling the squeeze. The average variable-rate mortgage payment has risen by more than 50% since the RBA began tightening in 2022. A 25-basis-point hike on a A$600,000 loan adds about A$90 to the monthly payment, and this is the fifth hike this year.

Consumer spending has held up better than expected, which is part of the reason the RBA feels it can keep hiking. But the resilience is partly driven by government fiscal support, including energy bill rebates and cost-of-living payments. The RBA has noted that fiscal policy is working against monetary policy, and Bullock has publicly called on the government to be more restrained in its spending.

The tension between fiscal and monetary policy is not unique to Australia, but it is sharper there than in most developed economies. The government is spending to offset the cost-of-living impact of the RBA’s own rate hikes, which means the RBA has to hike more to achieve the same effect on inflation. The dynamic is self-reinforcing, and it is one reason the board was split.

What I think

The RBA is in a harder position than any other major central bank right now. It is hiking into a slowdown, fighting a war-driven inflation shock it cannot control, and watching fiscal policy work against it. The 6-3 split tells you the board knows the risks are rising.

The AI-inflation angle is the most interesting part of this decision. If the AI investment cycle is now showing up in consumer price data in Australia, it will show up elsewhere eventually. Central banks have been treating the AI buildout as a productivity story. The RBA is now treating it as an inflation story. That shift in framing matters, because it changes the policy response. If AI investment is inflationary in the short run, the rate-cutting cycle in the US and Europe may be shorter than the market expects.

Bullock said a recession is “not our base case.” But the RBA’s own forecasts show inflation staying above target for another year, with growth slowing and household budgets under pressure. The path back to 2% to 3% inflation runs through a period of real economic pain, and the board knows it. Three members wanted to stop. Six members said keep going. The inflation fight is not over in Australia, and it may not be over in the rest of the world either.