Australia's September CPI due 28 October after annual inflation rose to 4.0% in August
The Australian Bureau of Statistics publishes the September monthly consumer price index on 28 October. Annual inflation rose to 4.0% in August from 3.5% in July, and trimmed mean inflation was 3.6%.
The Australian Bureau of Statistics publishes the monthly consumer price index for September 2026 on 28 October, according to its release schedule. It is the last Australian inflation reading before the Reserve Bank of Australia's decision on 3 November.
The last reading
Annual CPI inflation rose to 4.0% in August, from 3.5% in July. Automotive fuel rose 14.8% on the month, and housing 5.7% on the year. The trimmed mean, which the RBA prefers as a guide to underlying inflation, was 3.6% for a third month (August report).
What to watch
Fuel prices and the headline will matter for the market, but the trimmed mean is the measure the Bank watches most closely. A gap between the two is common when energy moves sharply, so traders will look at both before the Board meets.
Why it matters for AUD
The Bank raised its cash rate to 4.60% in September, a day before the August CPI was published (RBA report). The September figure will show whether the August rise was a one-off or a continuing trend. Live prices: AUD/USD.
Sources
Common questions
When is Australia's September CPI released?
The ABS publishes it on 28 October 2026.
What was Australia's annual inflation in August 2026?
Annual CPI inflation was 4.0%, up from 3.5% in July, with trimmed mean inflation at 3.6%.
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