Headline CPI Eased to 3.5%. The Trimmed Mean Is Still 3.6% for a Third Month. That Is the Serviceability Conversation

1. The number that did not move

Trimmed mean inflation was 3.6 per cent in the 12 months to July 2026. It was 3.6 per cent in the 12 months to June. It was 3.6 per cent in the 12 months to May. The ABC put it in one line: the RBA’s preferred measure did not budge, staying at 3.6 per cent for the third straight month.

Canstar, writing on 27 August, added the longer count: the last time core inflation went down was November 2025 — eight datasets ago. The ABS series supports that. The trimmed mean last declined in November 2025, from 3.3 per cent in October to 3.2. It then sat at 3.3 from December through March, stepped to 3.4 in April, 3.5 in May, and 3.6 in June. July held.

That is the print a credit team already knew how to sit with before the release. A three-tenth move in the headline does not rewrite HEM, assessment rate, or a file that only just cleared last week.

2. Headline versus the RBA’s measure

Headline CPI of 3.5 per cent is not a fiction. It is the all-groups annual movement, original and seasonally adjusted. The ABC noted it is now lower than before the Iran war in February, when the annual headline was 3.7 per cent. The New Daily called it the lowest headline since November — November 2025 printed 3.4 per cent, and nothing between then and July has been lower. Both comparisons are true. Neither is the trimmed mean.

The trimmed mean strips the largest price rises and falls and is the series the Bank has treated as the underlying read. In July it did not ease. The monthly trimmed mean rose 0.5 per cent. AMP economist My Bui told the ABC: “If you annualise that number, we get 3.6 [to] 3.8 per cent, so that’s just way too far from the RBA’s target.” She went on: “And even on the annual numbers, it has been 3.6 per cent three months in a row, contrary to people’s hope that it has been softening somewhat. This inflation seems not to move at all. It is still stuck around that really high range.”

Bui’s annualisation is hers. This piece will not invent a second one. The ABS number you can put on a slide is the annual 3.6 and the monthly 0.5.

3. What July actually printed

The largest annual contributors were Housing (+5.0 per cent), Food and non-alcoholic beverages (+3.2 per cent) and Recreation and culture (+2.6 per cent). Housing is still the weight. Inside that group the ABS is specific: new dwellings +5.7 per cent, rents +3.6 per cent — unchanged from the annual rise to June and to May — and electricity +6.1 per cent.

Electricity is the piece that made the headline look softer. The annual rise of 6.1 per cent is down from 22.4 per cent in the 12 months to June, “mainly due to the timing of rebate payments in 2025”. Water and sewerage rose 5.8 per cent in the month after annual price reviews; gas and other household fuels rose 2.8 per cent; electricity fell 1.6 per cent in monthly terms. The New Daily cited the electricity deceleration. Cite it as a contributor to the headline, not as proof that housing inflation has left the file.

Food’s 3.2 per cent was down from 3.3 per cent in June. Meals out and takeaway were the main contributor, up 4.5 per cent, with the ABS pointing to operating, ingredient and other input costs, including the 1 July minimum-wage award increases. Transport rose 1.6 per cent annual, up from 0.1 per cent to June. Automotive fuel rose 7.5 per cent in the month after three monthly falls. Rachel McCririck, the ABS head of price statistics, told the ABC that was world oil prices and the partial unwinding of the federal fuel-excise relief.

Capital cities are not one print. Annual all-groups: Sydney 3.2, Melbourne 3.2, Canberra 3.2, Brisbane 3.7, Darwin 3.7, Perth 3.8, Adelaide 4.4, Hobart 4.5. A national 3.5 is an average. Adelaide and Hobart are a different conversation if that is where the security is.

ABS, July 2026 analytical series. Volatile items are fruit and vegetables and automotive fuel. Original all-groups rose 1.0 per cent in the month.

4. Consensus missed it. Electricity did some of the easing

The New Daily, 26 August, had the monthly CPI at +1 per cent in July, consensus for the annual at 3.3 per cent, and the trimmed mean expected at 3.5 per cent. The annual printed 3.5. The trimmed mean held 3.6. The ABC separately said the 3.5 headline was slightly higher than the 3.3 many economists had predicted. Two newsrooms, same miss.

A miss on the headline is a one-day story. A miss on the trimmed mean, after eight datasets without a decline, is the serviceability story. Goods eased to 3.2 per cent annual. Services held at 3.7. Non-tradables — the domestic prices the Bank cannot import away — are still 4.4 per cent. Tradables are 1.7. The mix is not a broad cooling. It is a headline that moved on electricity timing, a high July 2025 dropping out of the annual calculation, and a fuel month that went the other way, while the sticky pieces held.

5. Named calls — not a market-implied number

This piece will not invent a market-implied probability. The named comments from the same 26 August coverage are enough.

David Bassanese, chief economist at Betashares, told the ABC the September meeting is “live”. He still anticipates the Bank will hold fire — GDP and employment are still to come. “That said, the risk of an RBA rate hike next month is now at least 30 to 40 per cent and mortgage holders are in for a nervous wait.” Thirty to forty is Bassanese’s number, attributed. It is not a traded probability.

Before the release, the ABC reported, almost 83 per cent of economists polled by Reuters expected a hold in late September. After the release, Bui said the Bank would be “quite worried” and that AMP saw “a very high chance of another rate hike coming for Australia before the end of the year.” Callam Pickering, APAC economist at Indeed, told the same ABC piece he no longer anticipates another hike this year, while still reading the next move as more likely up than down if productivity does not improve. Two desks, same print, opposite calendars.

NAB’s economics team, as reported by Canstar on 27 August, now expects a hike in just under five weeks and has flagged that another may be required in November — not NAB’s base case. Attribute that as NAB via Canstar. It is a forecast, not a fact. Canstar’s table had CBA and ANZ looking for a November hike and Westpac still looking for a cut in August 2027. Four banks, three calendars. Do not brief a client as if the path is settled.

The next cash-rate decision is 29 September. The next monthly CPI is 30 September — one day after. That timing is why Bassanese called the meeting live, and why a hold is still his base case.

6. The serviceability conversation this week

HEM and the assessment rate did not move because the headline eased three-tenths. A file that only just cleared last week still only just clears. A file that fails if the cash rate is 25 basis points higher still fails if NAB via Canstar is right in five weeks. You do not need their forecast to name the files. You need the current assessment settings and a second run.

Canstar modelled the repayment arithmetic if those hikes are passed on, for an owner-occupier paying principal and interest with 25 years remaining, using the RBA average variable rate from February 2026. On $600,000, a quarter-point in September is about $91 a month; September plus November is another $92; across five hikes in the year, Canstar puts the cumulative lift at $456 a month. On $800,000 the five-hike cumulative is $607; on $1 million, $759. That is Canstar’s model, not yours. Run the live file.

Housing inflation is still the largest annual contributor at 5.0 per cent. New-dwelling costs and rents are the two pieces that sit inside a purchase file whether or not electricity has decelerated. Rents at +3.6 per cent for a third month is a rental-income and a renter-servicing fact, not a colour piece. Services at 3.7 per cent annual is the sticky side of a PAYG income that is not about to get cheaper to live on.

Rate-review clients will read the 3.5 and call. Pre-approvals that expire around the September meeting will be re-opened on a print the client has already misunderstood. Unconditional dates do not care which number you forwarded.

7. Three things before the next client SMS

1. If you brief July, brief both numbers. Headline 3.5 per cent, down from 3.8. Trimmed mean 3.6 per cent, third month. If you only have room for one sentence, use the second. “Inflation is falling” is not a sentence this print supports.
2. Re-open the files that only just clear. Current assessment settings. Then the same files 25 basis points higher. Name the ones that fail the second run. Name the fallback lender. You are not forecasting a hike. You are counting capacity.
3. Write the trimmed-mean sentence before the phone rings. Rate-review and pre-approval clients will arrive with the headline. Have the 3.6, the third month, and the Housing +5.0 ready. The conversation is the file, not the newspaper.

The ABS print is dated July 2026, released 26 August. It does not authorise a victory-lap SMS. It authorises a serviceability briefing.