Key Highlights

  • The minutes say the Board’s strategy is to return inflation to target “in a timely manner”.
  • On the August forecasts, underlying inflation was not expected to reach the 2.5% midpoint until 2028.
  • After six years largely outside the target band, a slow path raises the risk that elevated inflation becomes entrenched.

Tucked into the minutes of the September meeting, a four-word phrase sums up the Reserve Bank's patience problem: inflation must come back to target, and it must not take too long doing so.

Central bank documents are read closely for a reason. Small choices of wording can signal how a policy board is weighing competing risks, and the minutes of the Reserve Bank of Australia's 28–29 September 2026 meeting, published on 13 October, contain one such phrase. Describing its strategy, the Monetary Policy Board said it aims to return inflation to target "in a timely manner".

It is a short phrase, but it carries a lot of weight. It tells readers the Board is concerned not only with where inflation ends up, but with how long the journey takes. That concern helps explain why the cash rate target was lifted by 25 basis points to 4.60% in September, the fourth increase of 2026, despite falling housing prices and a rising unemployment rate.

Why speed matters to a central bank

There is a tension at the heart of monetary policy. Bringing inflation down faster generally requires tighter financial conditions, which weigh more heavily on households, businesses and jobs. Bringing it down slowly is gentler on activity, but leaves inflation above target for longer.

Governor Michele Bullock's comments at her 29 September media conference showed which side of that trade-off was weighing on the Board. Inflation, she said, had been outside the 2–3% target band for six years, apart from a brief return inside it in 2025. The longer that goes on, the greater the risk that people come to expect high inflation as normal.

Bullock framed the Board's aim as needing to "stop expectations for high inflation from becoming embedded in price-setting decisions across the economy". The Board's statement, in paraphrase, noted that short-term inflation expectations were elevated. The minutes, meanwhile, said recent developments "pointed to an increase in the risk of persistently elevated inflation."

Put together, these explain the emphasis on timeliness. A slow return to target is not simply a delay; in the Board's framing, it increases the chance that high inflation becomes self-sustaining.

What the forecasts say about timing

The RBA's August Statement on Monetary Policy set out its view of how long the return to target would take. It is important to note those forecasts were finalised on 5 August, before the September rate rise, and assumed a cash rate path of 4.4% at December 2026 and 4.5% through 2027.

Under those assumptions:

  • Trimmed mean inflation was expected to stay at 3.0% in June 2027, falling from 3.6% in the year to June 2026 to 3.3% by December 2026, 3.0% by June 2027 and 2.6% by December 2027, before declining to "the midpoint of the 2–3 per cent target range in 2028".
  • Headline CPI was forecast to return to the 2–3% range by Mid-2027, falling from 3.9% in the year to June 2026 to 2.8% by June 2027, and then to sit "at or a little below the midpoint of the inflation target throughout 2028."

In other words, even on the August projections, underlying inflation would not reach the 2.5% midpoint until 2028. That is already a long runway, which gives some sense of why the Board was wary of developments that might stretch it further.

The data that tested the timeline

Several developments between August and late September suggested the path might be slipping. The Board's statement said "some of the upside risks flagged in August are materialising."

The minutes recorded that the July monthly CPI was stronger than expected, particularly for market services, and that domestic petrol and diesel prices were 13% higher than forecast in August. Staff judged the underlying inflation surprise more likely reflected domestic capacity pressures than cost pass-through from the Middle East conflict. Members concluded that "inflation remained too high."

Bullock offered a simple yardstick. Quarterly inflation of about 0.6% is consistent with roughly 2.5% a year, she said, whereas recent readings had been 0.8 and 1. The trimmed mean rose 0.8% in the June quarter alone, seasonally adjusted, and 3.6% over the year. Bullock described underlying inflation as running at "about 3.5 per cent for the past six months", which she said was "a percentage point above our target". Headline CPI, a separate measure, was 4.0% in the year to August 2026.

The Board did not ignore the cost of moving faster. The minutes show members weighed a 25 basis point increase against holding, with arguments for holding centred on downside risks to activity. Members judged those risks modest.

There were signs that tighter policy was already biting. The statement said "housing prices have fallen in most capital cities" and "new housing loans have declined noticeably". Household consumption slowed to a below-trend pace in the first half of 2026, as expected, and unemployment rose to 4.6% in August.

Against that, June quarter GDP was a little stronger than expected, led by private business investment, which was up more than 10% over the year. Unit labour cost growth was above a level consistent with the target, driven mainly by weak productivity. Bullock was blunt on that point: "The bottom line is that productivity is doing nothing."

The Board's conclusion was that "a further tightening in financial conditions is warranted to support a return of inflation to target". Bullock acknowledged the cost directly: "Those who have mortgages, yes, this clearly impacts them and it hurts them."

What "timely" does not promise

The phrase sets a direction rather than a deadline. Bullock was candid about the uncertainty: "Will it be enough? I don't know." She also declined to commit to a path: "I'm not going to give you forward guidance."

The minutes leave further moves open, noting the Board would consider "increasing the cash rate target further if required." And with Bullock saying the full effect of rate changes takes 12 to 18 months, the impact of 2026's rises is still working its way through.

The next decision is scheduled for 2.30 pm on 3 November 2026, after September CPI data are released on 28 October.

The bottom line

"In a timely manner" captures why the RBA moved in September even as some parts of the economy softened. On the August forecasts, finalised before the latest rise, underlying inflation was not expected to reach the 2.5% midpoint until 2028, and subsequent data suggested risks were tilting the wrong way. After six years largely outside the target band, the Board has signalled that the speed of the return matters, because a slow path raises the risk that elevated inflation becomes entrenched.