RBA's Inflation Challenge
Australian May CPI Expected to Accelerate, Testing RBA's Cautious Rate Stance
Key Points
Markets are weighing a potential Middle East peace deal for clarity on inflation momentum, with the USD widely bid as rate differentials have favored it; some analysts warn a peace deal could still be a 'false dawn' for the greenback and shift expectations back toward Fed rate cuts if tensions ease.
The RBA has signaled it remains focused on preventing inflation from becoming embedded after the oil-price impulse passes through, and will stay data-driven in guiding policy decisions.
Housing inflation is expected to stay firm, with new dwelling costs and rents anticipated to provide ongoing upward pressure on prices.
Fuel-price dynamics could ease inflation in the near term, with estimates citing roughly a 12% monthly fall in fuel costs and an upcoming expiry of the domestic fuel excise cut.
Forecasts for May CPI diverge, with some analyses predicting about 3.8% YoY while others peg it near 4.4% YoY, underscoring uncertainty around inflation momentum.
Australia's May inflation data landed with a surprise on June 24, 2026. Headline CPI came in at 4.0% year-over-year — well below the 4.4% markets had expected — but the underlying story told a different tale. ABS data showed trimmed-mean inflation, the measure the Reserve Bank of Australia watches most closely, accelerated to 3.6%, up from 3.4% in April.
The split result has left the RBA's next move deeply uncertain. The cash rate sits at 4.35% after three hikes already in 2026. A cheaper headline number gives policymakers room to pause. But core inflation running hotter than forecast makes another hike hard to rule out, with markets currently pricing in a roughly 30% chance of a move at the August 12 meeting, Yahoo Finance reported.
Cheap Fuel Masked Deeper Inflation Pressures
The headline CPI miss was largely a fuel story. Petrol prices fell 11.9% in May alone, ABS data showed. That drag came from two sources: a global oil price slump tied to a preliminary US-Iran peace deal announced on June 15, which pushed Brent crude roughly 30% below its mid-crisis peak to around $80 per barrel, and a government fuel excise cut of 32 cents per liter introduced in April.
Strip out fuel and the picture looks very different. Housing costs rose 6.5% over the year, up from 6.3% in April. Electricity prices jumped 21.1% year-over-year, Yahoo Finance reported, as earlier government rebates expired. ABS Head of Prices Statistics Rachael McCririck noted that electricity costs are "21.1 per cent higher than 12 months ago" due to those expiring subsidies. Rents and new dwelling costs continued to push upward with no sign of easing.
Fuel Excise Taper Will Push Prices Back Up in July
The headline relief may be short-lived. Prime Minister Anthony Albanese announced on June 21 that the 32-cent fuel excise cut would be halved to 16 cents per liter from July 1, rather than scrapped entirely. He said the move would "help Australian motorists and businesses with the cost of living as this support tapers off," SBS News reported. But the NRMA estimates the taper will add roughly $11 per tank at the bowser.
That means the July and August CPI reports are likely to show headline inflation jumping back up, even if global oil prices stay low. Treasurer Jim Chalmers tried to play down rate-hike fears, calling the 4.0% figure "much better than the market expected," Mortgage Professional Australia reported. The Opposition disagrees, arguing the government has leaned too heavily on temporary subsidies that mask — rather than fix — the underlying inflation problem.
Hawks and Doves Split Over What the RBA Does Next
Analysts are sharply divided. On the hawkish side, Westpac economists penciled in two more 25-basis-point hikes — one in August and one in September — citing trimmed-mean inflation tracking ahead of the RBA's own forecasts, Mortgage Professional Australia reported. MacroBusiness analyst Leith van Onselen argued that core inflation at 3.6% "pressures the RBA to hike."
NAB took the opposite view, shifting its call to a full hold for the rest of 2026 as economic momentum slows. Unemployment has already risen to 4.5% from a trend of 4.3%. The RBA's own June statement said it remains "cautious" and wants to avoid embedding inflation — but also a hard landing. If core inflation stays above 3.5%, the cash rate could hit levels not seen since 2011, Finder noted.
Peace Deal Optimism Clouds the Inflation Outlook
The US-Iran ceasefire announced June 15 is the wild card for the months ahead. US President Donald Trump hailed the deal on social media, declaring, "Ships of the World, start your engines. Let the oil flow!" as the Strait of Hormuz reopened to traffic. Lower oil prices, if sustained, would give the RBA more room to hold — or even ease — without stoking inflation further.
But analysts at Morningstar warned the deal may be a "false dawn." The ceasefire lasts only 60 days, and shipping and insurance costs will take months to normalize. They estimate a "higher floor" for oil prices of $75–$80 per barrel — well above pre-war levels. If the deal collapses, another energy shock could force the RBA's hand and push Australian households, already stretched by a cash rate at 4.35%, into even tighter conditions.
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