- Decision. The Reserve Bank of Australia unanimously raised its cash rate by 25 basis points to 4.6% on Tuesday — the fourth increase of 2026 and the highest level since November 2011.
- Cause. The board cited inflation at 3.5%, above its 2–3% target, driven by sustained Middle East energy price pressure and AI-related demand pushing up global technology goods prices.
- Warning. Governor Michele Bullock said the RBA “will continue to do what it considers necessary,” explicitly leaving further hikes on the table.
Australia’s central bank tightened policy for the fourth time this year on Tuesday, raising the cash rate target to 4.6% — a level last seen in 2011 — as inflation remains stubbornly above the RBA’s 2–3% target range. The nine-member policy board voted unanimously for the increase, according to ABC Australia, after deliberating between holding rates steady and hiking by 25 basis points.
Headline inflation sits at 3.5%, and the board concluded that capacity pressures in the Australian economy were stronger than expected in its August forecasts. Governor Michele Bullock stated the board remains focused on ensuring that high inflation “does not become embedded,” framing Tuesday’s decision as a continuation of a tightening cycle that began earlier this year.
Middle East and AI as New Inflation Drivers
The RBA’s statement identified two factors that have pushed inflation higher since the August meeting. The first is the ongoing conflict in the Middle East: sustained higher fuel, fertiliser, and transport costs have filtered through the supply chain into domestic prices at a pace faster than the August projections assumed. The Strait of Hormuz has been largely closed to commercial traffic since February, adding weeks to voyage times and raising freight costs globally.
The second factor is AI-related demand. Rapid growth in the deployment of data-centre infrastructure and AI-optimised hardware has driven up global prices for technology-related goods, feeding into investment and consumer price indices. The RBA is among the first central banks to explicitly cite AI adoption as a contributing inflation input in a formal rate decision.
Market and Mortgage Impact
The Australian dollar rose 1% to 70.18 US cents in the immediate aftermath of the decision as markets priced in higher carry. On the lending side, Macquarie Bank announced it would pass the full 25 basis-point increase to mortgage borrowers effective October 15, 2026. Other major lenders are expected to follow.
The RBA’s decision lands in a global context where other central banks have also resumed tightening. Norges Bank raised its rate to 4.50% and warned of a further possible hike earlier this month, and the US Federal Reserve delivered its first rate increase in three years in September. The RBA’s explicit forward guidance — that it “will continue to do what it considers necessary, including increasing the cash rate target further if needed” — aligns with the hawkish posture of its peers.
What the RBA Is Watching
Governor Bullock highlighted two variables the board will monitor before its next meeting: whether Middle East energy prices stabilise as diplomatic contact between the US and Iran continues, and whether the AI-driven technology goods inflation proves durable or temporary. The board considered the possibility of pausing tightening but ultimately concluded that recent inflation outcomes had exceeded expectations sufficiently to warrant action.
The next RBA meeting is scheduled for November 4, 2026. Futures markets, having priced in Tuesday’s hike, are now split roughly evenly on whether a fifth increase follows before year-end.