Roughly 1.75 million Australian owner-occupier borrowers were financially stretched in the September 2026 quarter. That is 31.8% of the group, according to survey work from Roy Morgan, and it sits 7.9 points higher than in January. The most recent monthly reading did improve slightly, down 0.5 points on August. But the part that should worry lenders and borrowers alike is what the survey has not yet captured.
The RBA lifted the cash rate in February, March and May, then again in late September, taking it to 4.6%. That fourth rise landed too late to show up in most of the survey window. So this reading is a snapshot of borrowers before the latest increase hit their repayments.
Mortgage arrears risk is not the same as mortgage arrears
Here is the catch. “At risk” is a survey measure of financial strain. It is not a count of missed payments. A household can be stretched for months, cut spending, drain savings and still keep up with the bank. Arrears only appear when that buffer runs out.
So the 31.8% figure is best read as the pool from which future arrears would come, not a forecast of how many will default. Most stretched borrowers will not miss a repayment. The question is how many run out of room if conditions worsen.
The number inside the number
The more telling figure is the extreme end. A record 1.26 million borrowers, or 23%, sit in the “extremely” vulnerable category. The 20-year norm for that group is 16.5%.
That gap matters because the extremely vulnerable have the thinnest cushions. If arrears climb, they are likely to come from this cohort first.
- Headline at-risk share: 31.8%, about 1.75 million owner-occupiers
- Change since January: up 7.9 points
- Extremely vulnerable: 23%, or 1.26 million, against a 16.5% 20-year norm
- Cash rate: 4.6% after four rises this year
Key numbers
- 31.8% of owner-occupier borrowers stretched in the September quarter
- 23% in the extremely vulnerable category, a record
- 4.6% cash rate after the late-September rise
Why September looked better, and why that may not last
Roy Morgan’s chief executive pointed to rising household earnings as the reason for the small monthly improvement. That is a real offset. Higher wages lift income against a fixed loan balance and ease serviceability at the margin.
But the same commentary flagged three ongoing pressures: the rate hikes themselves, softer prices in some major markets, and a shrinking workforce. Each works differently. Rate rises lift repayments directly. Falling prices erode equity, which limits refinancing options for borrowers who want to shop around. A weaker labour market threatens the income that has been doing the offsetting.
If you want the mechanics of how a cash rate move flows into repayments, our guide to RBA interest rates and mortgage repayments walks through it step by step.
A counterweight from the central bank
The RBA’s October 2026 stability review took a calmer line. It said most borrowers could cope even with a steep fall in house prices. Those two views are not necessarily in conflict. A stability review asks whether the financial system can absorb a shock. A stress survey asks how many households feel squeezed right now.
A system can be sound while a large share of households are uncomfortable. The risk is in the gap between the two: if the squeeze lasts long enough, comfortable-in-aggregate can still mean painful for the stretched tail.
What could derail this reading
The base case is that stress stays elevated but arrears stay contained, helped by wage growth and household buffers. Several things could break that.
- More rate rises. Roy Morgan’s modelling, as reported, suggests the at-risk share could reach 34.3% if the cash rate climbs to 5.1% by December. That would push stress to its highest level since 2008.
- A weaker jobs market. Wages are doing the heavy lifting right now. A shrinking workforce puts that at risk.
- Falling prices in big markets. Softer values reduce the equity cushion that lets borrowers refinance or sell on their own terms rather than being forced.
We do not have a cohort breakdown from this survey, so it would be a guess to say whether recent buyers, investors or high-LVR borrowers are driving the figure. Those groups are the ones to watch in lender arrears data when it arrives, because they typically have the least slack.
Stress-test your variable-rate repayment and call your lender early
If you hold a variable-rate loan, work out your repayment at a cash rate half a point to a full point higher and check whether it still fits your budget. If it does not, talk to your lender about options before you miss a payment, not after. Lenders generally have more flexibility with borrowers who ask early.
The next real test is arrears data from lenders over the coming quarters, which will show how much of this survey stress turns into missed repayments.
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General info, not financial advice.
