RBA hikes to 4.35% in third straight rise as Iran war fuels Australian inflation

The Reserve Bank of Australia raised its cash rate by 25 basis points to 4.35% on May 5, delivering a third consecutive increase as the energy shock from the conflict in the Middle East stoked domestic inflation. The move, widely expected by markets, lifted the benchmark from 4.10% and returned it to its prior cycle peak, effectively unwinding the three rate cuts the bank had delivered during 2025.

The decision cemented the RBA's status as the first major Western central bank to pivot from easing to tightening in 2026, a distinction Governor Michele Bullock acknowledged while noting that other economies were beginning to confront the same dilemma. The bank has been candid that an inflation problem was already brewing before the war erupted, but officials stressed that the surge in fuel prices had sharply worsened the trade-off between containing prices and supporting growth.

In its statement and at the subsequent press conference, the board leaned on the risk of so-called second-round effects, the danger that higher fuel costs feed through into wages and the prices of goods and services more broadly. Bullock warned that if cost pressures were left unchecked they could become embedded in the economy, potentially requiring even more tightening to bring inflation back under control. The board characterized the new setting as somewhat restrictive while signaling it wanted room to assess how conditions evolve.

Inflation data underpinned the urgency. Australian headline inflation had climbed to its highest level since 2023, with underlying measures holding above the RBA's 2% to 3% target band. The board judged that price pressures were likely to remain above target for some time, reflecting both the fuel-driven impulse and existing capacity constraints in an economy struggling with weak productivity growth.

The market reaction and economist commentary pointed to a central bank approaching a possible pause. Several analysts read the accompanying language as a signal that rates were now high enough to give policymakers scope to wait and monitor incoming data, with one major lender's base case shifting toward steady policy for the remainder of the year. At the same time, the bank's own forecasts embedded roughly one further increase, and interbank futures continued to price the risk of an additional move later in 2026.

For Australian households, the hike added to the strain of a tightening cycle that has now clawed back the relief delivered the prior year. Mortgage holders faced higher repayments as lenders moved to pass on the increase, and housing-market analysts suggested the latest rise would further dampen demand that had already been cooling since late 2025. Bullock did not shy away from the difficulty, acknowledging the pain of the decision while arguing the bank had little choice but to act.

The episode highlighted a broader theme rippling through global markets in 2026: an energy-price shock that is simultaneously lifting inflation and clouding the growth outlook, forcing central banks into uncomfortable choices. Where some peers have held steady to assess the same risks, the RBA judged that the inflationary impulse warranted a pre-emptive response, betting that acting early would reduce the need for harsher action later.

For the Australian dollar and local rates, the decision reinforced a relatively hawkish policy stance at a time when several other central banks were still weighing their options, a divergence that has at times lent the currency support. With the next inflation readings and the trajectory of fuel prices set to shape the outlook, attention turned to whether May would mark the peak of the cycle or merely another step in a longer campaign against war-driven inflation.