Australia
Inflation overshoot signals a likely rate hike next week
28 January 2026 | Minutes to read: 3

Inflation overshoot signals a likely rate hike next week

By Besa Deda, Chief Economist
Key insights:
Inflation now joins employment in signalling an economy that is running hotter than policymakers expected, making a rate hike next week highly likely.
Underlying inflation remains the central focus of Reserve Bank (RBA) policy. The trimmed mean measure of underlying inflation rose 0.9% in the December quarter, taking the annual rate up to 3.4% and critically above the RBA’s own forecast.
The lift in inflation follows stronger labour-market outcomes. The unemployment rate averaged 4.2% in the December quarter, below the RBA’s forecast of 4.4%.
Services inflation remains a challenge, rising 4.1% in the year to December, although there were early signs of modest easing in some segments. However, services prices tend to be sticky. I often describe this as the ‘toothpaste effect’. Once the toothpaste is out of the tube, it is hard to get it back in.
The Aussie dollar has been propelled higher by the prospect of a rate hike and an escalation in geopolitical tensions. The latter has contributed to a sharp selloff in the US dollar and currency intervention to support the Japanese yen. The appreciation in the Australian trade-weighted index, if sustained, could help contain price pressures in imported goods and services.
The global economy demonstrated a degree of resilience last year, despite ongoing uncertainty. The question now is how long that resilience can continue as geopolitical risks and uncertainty stay high. Policymakers will need to weigh these risks carefully next week. We think it won’t be enough to keep policy on pause.
Across the states and territories, Brisbane recorded the fastest inflation rate at 5.2% in the year to December, followed by Perth at 4.4%. The softest annual outcomes were in Melbourne and Darwin at 3.1%, which notably were still above the RBA’s target range.

Inflation now joins employment in signalling an economy that is running hotter than policymakers expected. A rate hike next week is now the most probable outcome. It also prompts us to revise our 2026 outlook. We had one rate rise in our forecasts since late last year. We now expect two rate hikes this year with the first to be handed down next week. 

Underlying inflation is the focus of RBA policy. It rose by 0.9% in the quarter, a tad slower than the 1.0% gain in the previous quarter, but still strong. It took the annual rate up from 3.0% in the September quarter to 3.4% in the December quarter. This is above the RBA’s own forecast published in November for a 3.3% outcome. The pick up began over the second half of last year and over this period, trimmed mean inflation grew 3.9%! 

The lift in inflation follows stronger labour-market outcomes. Data last week revealed the unemployment rate averaged 4.2% in the December quarter, below the RBA’s forecast of 4.4%. This mix of stronger price pressures and a firmer jobs market points to an economy that is outperforming the RBA’s expectations. 

Headline inflation increased by 0.6% in the quarter and the annual rate rose from 3.2% to 3.6%. Electricity prices continue to contribute strongly as government energy rebates unwind.  

The monthly data series showed headline inflation at 3.8% in the year to December and underlying inflation growth of 3.3% year-on-year. 

One deliberation for policymakers next week will be the impact of the escalation in geopolitical tensions and the increase in uncertainty since the start of the year. These developments have contributed to a sharp selloff in the US dollar and to joint intervention by the United States and Japan in the currency market to support the yen. It has also spurred the spot gold price to new all-time highs. The US dollar index fell overnight to its lowest level since February 2022.  

This backdrop together with the prospect of a near-term rate hike in Australia has helped propel the Australian dollar to a near three-year high of 0.7023 during today’s trade. 

For policy making, the more important measure is the trade-weighted index (TWI). The TWI measures the value of the Australian dollar against the currencies of our major trading partners. The weights reflect each partner’s share in Australia’s trade. The TWI has appreciated. If this appreciation is sustained, it should help contain the prices of imported goods and services and ease tradables inflation. 

The global economy demonstrated a degree of resilience last year, despite ongoing uncertainty. The question now is how long that resilience can continue as geopolitical risks and uncertainty stay high. Policymakers will need to weigh these risks carefully. We think it won’t be enough to keep policy on pause. 

Services inflation remains a key challenge. It rose by 4.1% in the year to December. Goods inflation increased by 3.4%. Both remain above the top of the target band. Services prices tend to be sticky. I often describe this as the ‘toothpaste effect’. Once the toothpaste is out of the tube, it is hard to get it back in. 

Across the states and territories, Brisbane recorded the fastest inflation rate at 5.2% in the year to December, followed by Perth at 4.4%. The softest annual outcomes were in Melbourne and Darwin at 3.1%, which notably were still above the RBA’s target range. The only capital city to see a slowing in the annual growth rate in December from November was Darwin.  

Besa Deda, Chief Economist

Besa Deda, Chief Economist

Besa brings economic insights to William Buck, delivering context-rich analysis that helps clients make smarter, more confident decisions. She also serves as Chair of the not-for-profit organisation Australian Business Economists, where she has championed diversity, modernised operations, and expanded its reach in informing, connecting and influencing economic and policy debate in Australia.

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