Australian consumer sentiment fell 5.2 per cent to 84.4 in September 2026, according to the Westpac-Melbourne Institute survey released on 8 September, and the damage was concentrated almost entirely among households carrying a mortgage. Renters were close to flat over the month, while confidence among mortgage holders dropped by roughly 13 to 14 per cent depending on the measure.
That split is the story. This is not a broad cost of living slump spread evenly across the country. It is a rate expectations shock landing on one specific group, at a point when the Reserve Bank has stopped talking about cuts and started talking about the conditions under which it might hike.
What the September survey actually showed
A reading of 84.4 sits well below 100, the level where optimists and pessimists balance out. Anything in the 80s is historically weak territory, and September marks a clear step down rather than a drift.
The mechanism behind the fall is visible in the survey’s own sub-indices. The Westpac-Melbourne Institute Mortgage Rate Expectations Index rose 7.3 per cent to 170.4, meaning far more people now expect their borrowing costs to go up than down. Around 64 per cent of consumers said they expect mortgage rates to rise over the next year, and among mortgage holders that share was closer to 73 per cent.
Higher petrol prices were also cited as a drag on the September result, so rates are not the only pressure in play. But the gap between mortgage holders and renters points squarely at borrowing costs.
Why expectations have turned
The cash rate has been sitting at 4.35 per cent since the Reserve Bank’s decision on 11 August 2026. What has changed is not the rate itself but the direction everyone now expects it to move.
Inflation is the reason. Annual headline inflation eased to about 3.5 per cent in July, down from roughly 3.8 per cent in June, while the trimmed mean measure that the RBA watches most closely held near 3.6 per cent. Both sit above the RBA’s 2 to 3 per cent target band, and the trimmed mean has been stubborn rather than falling steadily. RBA officials have said publicly that inflation has been above target for some time and that the board may need to raise rates if inflation runs stronger than forecast.
Bank forecasts have shifted to match. NAB has been forecasting a 25 basis point rise to 4.60 per cent at the September meeting. ANZ and CBA have pencilled in the same move but in November. Westpac was the last of the big four to change its call, moving in early September to a November hike, citing a more resilient household sector than expected. That leaves no major bank publicly forecasting cuts in the near term, which is a meaningful change from where the market sat earlier in the year.
The next decision is due at 2.30pm on 29 September 2026. Forecasts are not outcomes, so confirm the current cash rate and meeting schedule directly with the Reserve Bank of Australia.
The housing backdrop makes it sharper
Falling confidence among mortgage holders is not happening in isolation. Dwelling values fell around 0.9 per cent nationally in August, the fifth consecutive monthly decline, with national values down roughly 3.1 per cent across the three months to August. Sydney has been the weakest of the major capitals.
For a household with a mortgage, that combination is uncomfortable in both directions at once. The asset side of the balance sheet is softening while the cost of servicing the debt against it is expected to rise. Renters face cost of living pressures but not that particular squeeze, which is roughly what the sentiment split is measuring.
Sentiment surveys measure how households feel about the future, not what the Reserve Bank has already done. When expectations move faster than the cash rate, the anxiety arrives before the repayment does.
Our breakdown of the August RBA rate decision covers how the board framed its hold and what it flagged as the conditions for moving.
What borrowers can usefully do now
Sentiment readings are not a call to action on their own. But a period when the market expects rises is a reasonable prompt to check a few things that are within your control.
Know your actual rate. Not the rate you signed at, the one on your current statement. Many borrowers have drifted onto a revert rate without noticing, and that gap is often larger than any single RBA move.
Stress test your repayment. Work out what an extra 0.25 percentage points would cost you each month at your current balance. On a $600,000 variable loan, a 0.25 percentage point rise adds roughly $90 a month, so scale that to your own balance. Knowing the number ahead of time is far more useful than reacting to it later.
Check whether your rate is competitive. If it is not, a retention call to your lender or a move elsewhere can be worth more than the size of the rate move being debated. It takes very little time to see how your current rate stacks up against what lenders are advertising, and that comparison is the same regardless of what the RBA does this month.
Understand your fixed rate position. If you are on a fixed rate, expectations of a hike do nothing to your repayment until the term ends. What matters is the date that term expires and what you roll onto. If a switch is on the cards, our walkthrough on how to refinance a home loan sets out the costs and the traps.
This article is general information only and is not personal financial, tax or legal advice. Your loan, lender and circumstances will differ, so consider getting advice tailored to you before making a decision.
The bottom line
The September 2026 consumer sentiment reading of 84.4 tells you something specific rather than something general. Households with a mortgage have shifted from expecting relief to expecting pressure, and they have done so before the Reserve Bank has actually moved. Whether that expectation is proved right on 29 September or in November, the practical response is the same: know your current rate, know what a 0.25 percentage point move costs you, and treat the gap between your rate and the best available one as the number worth acting on. All figures here were checked on 10 September 2026 and should be confirmed against the original sources.