RBA signals potential for further cash rate increases amid inflation risks

The Reserve Bank of Australia just told markets what they probably didn’t want to hear: three rate hikes might not be enough.

After raising the cash rate by 25 basis points to 4.35% on May 5, the RBA acknowledged that its tightening measures are filtering through to inflation and financial conditions. But the central bank left the door wide open for additional increases if inflation risks don’t ease.

Three hikes and counting

The RBA has now delivered three consecutive rate increases in 2026, starting the year at 3.60% and steadily marching the cash rate up through February, March, and May. That 3.60% starting point was itself the product of easing measures adopted in 2025, when the central bank had been cautiously cutting rates.

The reversal is driven by one stubborn number: headline inflation hit 4.6% in March 2026, the highest reading since 2023. That’s well above the RBA’s 2-3% target band. Short-term inflation expectations have also risen notably.

The domestic inflation picture is being made worse by elevated global energy prices, driven by geopolitical developments in the Middle East, alongside domestic supply constraints.

Governor Michele Bullock has signaled that while the RBA might hold steady at its next meeting on June 16, further hikes remain firmly on the table if inflation doesn’t show sustained moderation.

What the market expects

Market forecasts suggest the cash rate could climb to approximately 4.70% by the end of 2026. That implies roughly 60 basis points of additional tightening beyond the current 4.35% level.

The consensus view is that June will bring a hold, with most economists anticipating the RBA pausing for much of the year to assess how the three hikes are working through the economy.

Statements from the Board have emphasized preventing inflation expectations from becoming “unanchored” as the primary concern. The RBA’s dual mandate targets both sustainable inflation and full employment, requiring the central bank to balance tighter monetary policy against its potential impact on hiring.

What this means for investors

Australian housing faces renewed headwinds from higher borrowing costs, which reduce purchasing power and cool demand. Retail spending is similarly vulnerable as rising mortgage payments eat into disposable income.

The Australian dollar is another variable worth watching. Higher interest rates typically support currency strength by attracting yield-seeking capital flows, but the interplay between RBA policy and the US Federal Reserve’s own rate trajectory will be a key factor in determining where AUD/USD heads in the second half of 2026.

The RBA is hiking into a global environment where energy supply shocks are adding inflationary pressure that monetary policy alone can’t solve, meaning the RBA might need to keep rates higher for longer than markets currently expect. The smart money will be watching June 16 not just for the rate decision itself, but for any shift in the RBA’s forward guidance that might signal how far this cycle still has to run.

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