Key Highlights

  • Imported pressure comes from higher fuel and energy costs linked to the Middle East conflict and from global demand for technology goods driven by AI investment.
  • Domestic capacity pressures reflect weak productivity, a still-tight labour market and strong investment.
  • RBA staff judged that the recent underlying surprise owed more to home-grown pressures than to imported fuel costs.

Australia's inflation problem has several sources at once, some imported from overseas and some made at home, and the RBA's September statement, minutes and media conference together sketch a map of where the pressure is coming from and which parts worry the Board most.

Inflation is often discussed as a single number, but it is the sum of many price changes with many causes. Headline CPI was 4.0% over the year to August 2026, according to the monthly CPI. Underlying inflation, measured by the trimmed mean, was 3.6% over the year to the June quarter of 2026. Both are above the Reserve Bank of Australia's 2–3% target, which aims for the 2.5% midpoint.

When the Monetary Policy Board raised the cash rate target by 25 basis points to 4.60% at its 28–29 September meeting, it said "Inflation remains elevated" and that "some of the upside risks flagged in August are materialising." Sorting through the RBA's explanations, the sources fall into three broad territories: energy from abroad, global technology demand, and pressures generated within Australia. A fourth factor, expectations, runs across all three.

Territory one: fuel and the global energy shock

The most visible source is energy. According to the Board's statement, the upside risks included a broader Middle East conflict and higher global energy prices, and higher fuel costs were spreading to other goods and services (all paraphrased).

The minutes, published on 13 October, quantify part of this: domestic petrol and diesel prices were 13% higher than forecast in August. The RBA's August 2026 Statement on Monetary Policy (SMP), with forecasts finalised on 5 August and therefore before the September rate rise, had assumed Brent crude at US$94.9 a barrel in the June quarter of 2026, easing to US$81.2 by December 2026.

Governor Michele Bullock warned at her 29 September media conference that the shock may linger: "Disruptions to oil supply could last longer than anticipated".

Fuel feeds straight into headline CPI, which is why energy shocks tend to show up there first. The bigger question for the RBA is whether higher fuel costs spread into the prices of other goods and services, which the Board says is happening.

Territory two: technology goods and the AI boom

The second source is less familiar. The Board's statement listed AI-related demand pushing up technology goods prices as one of the upside risks (paraphrased). In August, Assistant Governor (Financial Markets) Christopher Kent pointed to "resilient global demand because of AI-related investment".

The logic is straightforward in principle: when demand for chips, servers and related equipment surges around the world, the prices of those goods can rise, and Australia imports many of them. The RBA has flagged this as a risk rather than quantified its effect on the CPI.

AI also appears in the RBA's financial stability assessment, where the minutes list AI-related debt accumulation among the global risks. That is a separate issue from inflation, but it underlines how prominent the theme has become in the Bank's thinking.

Territory three: home-grown capacity pressures

The third territory is the one the RBA emphasises most for underlying inflation. Bullock was direct: "Inflation is too high and has been driven by domestic capacity pressures." Capacity pressures arise when demand in the economy presses against what it can readily supply.

The minutes provide the key evidence. The July monthly CPI was stronger than expected, particularly in market services. RBA staff judged that the surprise in underlying inflation more likely reflected domestic capacity pressures than cost pass-through from the Middle East conflict. The Board's statement also said capacity pressures remain.

Several features of the domestic economy feed into that picture:

  • Labour costs and productivity. The minutes say unit labour cost growth is above the level consistent with the target, driven mainly by weak productivity rather than strong wages. "The bottom line is that productivity is doing nothing," Bullock said.
  • A labour market that is still tight. Unemployment rose to 4.6% in August, but Bullock said "the unemployment rate is still quite low historically, and we still think the labour market is a little bit tight."
  • Strong investment. June quarter GDP was a little stronger than expected, led by private business investment, which was up more than 10% over the year. The statement noted that "growth in business investment and debt is strong".
  • Housing supply. Bullock observed that "we have a structural under supply of housing."

What is not on the map is just as telling. As the Governor put it, "there is no wage price spiral going on in Australia." Far from driving prices, many workers are falling behind them: "They're seeing real wage cuts."

The thread running through it all: expectations

Expectations are not a source of inflation in the same way fuel or capacity are, but they can amplify all of them. According to the Board's statement, short-term inflation expectations are elevated. If businesses and households expect high inflation to continue, they may build it into prices and plans, turning temporary pressures into lasting ones.

Bullock said the September increase was needed to "stop expectations for high inflation from becoming embedded in price-setting decisions across the economy". The minutes say developments "pointed to an increase in the risk of persistently elevated inflation", and members concluded "inflation remained too high."

This is why the territories matter differently to the RBA. An imported energy shock may fade if oil prices ease. Domestic capacity pressures, especially if reinforced by elevated expectations, are more likely to persist, and those are the pressures interest rates are designed to address. "Today's increase in interest rates is needed to slow the economy and return inflation to target," Bullock said.

The bottom line

Australia's inflation comes from several directions: higher fuel and energy costs linked to the Middle East conflict, global demand for technology goods driven by AI investment, and domestic capacity pressures shaped by weak productivity, a still-tight labour market and strong investment. The RBA's staff judged that the recent underlying surprise owed more to the home-grown pressures than to imported fuel costs.

That diagnosis underpins the Board's decision to lift the cash rate to 4.60%. The September CPI is scheduled for release on 28 October, and the next cash rate decision is scheduled for 2.30 pm on 3 November 2026; the Governor has said she will not give forward guidance.