Six in ten Australian mortgage holders now meet the technical definition of mortgage stress, with the average borrower directing 38 per cent of take-home pay toward loan repayments. That figure climbs to 41 per cent for millennial borrowers and sits at 30 per cent for baby boomers, creating a generational wedge that reflects when people bought and at what rates.
The threshold that regulators and lenders use is 30 per cent of gross income. Cross that line and you’re serviceability-stressed on paper. In practice, 1.4 million households are now spending at least 40 per cent of their pay on the mortgage, leaving thin margins for everything else. One in five borrowers report cutting groceries to meet repayments.
How we got here
The RBA lifted the cash rate 13 times between May 2022 and November 2023, taking it from 0.1 per cent to 4.35 per cent. Variable mortgage rates followed, adding roughly $24,000 a year to repayments on a $600,000 loan. Fixed-rate borrowers who locked in sub-2 per cent deals during the pandemic have since rolled onto rates above 6 per cent, doubling or tripling their monthly bills in a single refinance event.
At the same time, lenders tightened serviceability buffers. Where a bank might have assessed your application at a 5.5 per cent floor rate in 2021, that floor now sits closer to 8 per cent or higher, depending on the lender. Refinancing into a better rate requires proving you can service the new loan at today’s inflated assessment rates, which many stressed borrowers cannot do, even if switching would lower their actual repayment.
The result: 54 per cent of surveyed mortgage holders say they cannot refinance for reasons outside their control. They’re paying above-market rates on their current loan but fail the serviceability test elsewhere. That’s mortgage prison.
The cashflow crunch and what it hides
When close to 40 per cent of income disappears into mortgage repayments, households lose the ability to absorb shocks. A car repair, medical bill, or childcare increase can tip a stretched budget into arrears. Savings rates have fallen, and offset balances that built up during the pandemic have been drawn down to cover the gap.
The data also reveals spending substitution: groceries, utilities, and discretionary purchases are being cut to protect the mortgage. That behaviour keeps arrears low in the short term but stores up risk. If interest rates stay elevated for another 12 months, or if unemployment ticks up even modestly, the number of borrowers who can no longer juggle repayments will rise quickly.
Key numbers
- 60% of mortgage holders in financial stress (spending >30% of income on repayments)
- 38% average share of take-home pay going to mortgage repayments
- 41% for millennials vs 30% for baby boomers
- 1.4 million households spending at least 40% of income on loans
- 54% of borrowers unable to refinance due to serviceability constraints
- 20% cutting back on groceries to afford repayments
Policy consequences and what happens next
The original intent of rate hikes was to cool demand and bring inflation back to target without breaking the labour market. Unemployment has stayed low, but the cost has been transferred to mortgage holders, who are now carrying the policy load. If stress translates into forced sales, prices will soften in pockets where distressed listings concentrate. If it translates into defaults, banks will tighten lending further, locking more buyers out and reducing transaction volume.
The RBA’s credibility hinges on avoiding a wave of household failures while still anchoring inflation expectations. Holding rates at 4.35 per cent through a rising tide of mortgage stress tests that balance. A rate cut would ease pressure immediately, but the central bank has signalled it will wait for sustained evidence that inflation is under control. For borrowers already past 40 per cent of income, that wait is measured in months they may not have.
Trade-offs for borrowers in the stress zone
If you’re above 35 per cent of income on repayments, your options narrow quickly. Switching to interest-only can lower the monthly bill but extends the loan term and increases total interest paid. Extending the loan term reduces repayments but locks you into debt for longer and raises the risk you’re still paying a mortgage into retirement. Some lenders offer short-term hardship arrangements, pausing or reducing repayments for three to six months, but those arrangements show up on your credit file and limit your ability to refinance later.
Refinancing is the cleanest fix if you can pass serviceability. If you can’t, the calculus becomes: can you reduce expenses enough to ride this out, or is selling now, before distressed inventory floods your suburb, the better long-term call? That decision depends on your cashflow buffer, your equity position, and your view on how long rates stay elevated. There’s no perfect answer when you’re past the threshold.
What to watch over the next six months
Arrears data will be the leading indicator. If 30-day and 60-day delinquencies start climbing, it means borrowers have exhausted their buffers. Listings volume in outer suburbs and regional centres where mortgage stress is highest will show whether people are exiting before they’re forced to. Vacancy rates in those same areas will hint at whether investor landlords are also under pressure and starting to sell.
The RBA’s language around the labour market matters more now than inflation prints. If wage growth stays strong and unemployment stays below 4.5 per cent, the case for holding rates firms up. If unemployment rises or underemployment ticks higher, rate cuts become more likely, and mortgage stress eases mechanically. Until then, the 60 per cent of borrowers in the stress zone are pressure-testing the policy assumption that households can absorb this.
For more on how affordability thresholds are shifting across the country, see Rental affordability Australia: single workers now spend 50-69% of pay. And if you’re weighing your next move as a first-time buyer in this environment, First home buyer loans rising as investors retreat: what’s driving it breaks down the dynamics.
Start here: if you’re spending more than 35 per cent of your income on mortgage repayments, model your options now rather than waiting for a crisis. Run the numbers on refinancing, interest-only, and loan extension, and speak to your lender’s hardship team before you miss a payment. The earlier you act, the more levers you have.
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General info, not financial advice.
