Mortgage stress and arrears: how they work and where it shows

What is mortgage stress, and how do arrears work?

Mortgage stress is when loan repayments take so much of a household’s income that other essentials get squeezed. Arrears are the next stage: a borrower has actually missed repayments and is behind schedule. Stress usually comes first and arrears follow later, so a household can be under heavy strain for months before it shows up in any arrears figure.

The common marker for stress is repayments above 30 per cent of gross income. Arrears are measured by lenders as the share of loans behind schedule, often split into 30, 60 and 90-plus day buckets.

Key terms

  • Mortgage stress: repayments consuming a large share of income, commonly measured against a 30 per cent line.
  • Arrears: repayments missed and the loan behind schedule.
  • Serviceability: a lender’s test of whether your income, after living costs and a buffer, covers the loan.
  • Loan-to-value ratio (LVR): the loan as a share of the property’s value.
  • Negative equity: owing more than the home is worth.
  • Hardship arrangement: a lender-agreed change, such as a longer term or temporary interest-only period, to ease repayments.

What actually causes mortgage stress?

The cash rate gets the headlines, but the size of the debt relative to income matters more. A rate is a price. Debt-to-income is a load. When loans are large against pay, even a moderate rate produces a heavy repayment.

Our coverage of loan-size modelling estimated that servicing an average Sydney loan takes about 66 per cent of a median income, as of October 2026. See why loan size, not rates, sets the risk.

Other pressures stack on top. Essential bills such as energy, insurance and council rates can rise faster than headline inflation, which cuts the buffer left after repayments. We looked at this in how essentials outrun CPI. Fixed-rate expiries add a sudden step up rather than a gradual one.

How do households respond before they miss a payment?

Most households adjust long before arrears appear. The usual order is cutting discretionary spending, removing any voluntary repayment buffer, adding income, then drawing on savings or credit. Only when those options run out does a repayment get missed.

This is why arrears lag stress. Our coverage of how rate rises cross from inconvenience to constraint describes households exhausting savings and credit limits before a mortgage payment is missed. Low arrears can therefore give false comfort while strain is already high.

If you are in this position, speak to your lender early. Hardship arrangements are far easier to set up before a loan falls behind than after.

What happens if you cannot keep up repayments?

Higher repayments alone rarely force a sale. Lenders usually prefer hardship arrangements, extended terms or temporary interest-only periods. A forced sale generally needs three things together: sustained repayment stress, a fall in income such as job loss, and little or no equity.

That third point is where negative equity matters. If the loan exceeds the home’s value, selling locks in a loss and refinancing becomes hard. Our coverage of the RBA’s analysis, who sits at the edge of negative equity, found fewer than 1 in 100 borrowers were in negative equity, as of October 2026. The chain to watch is prices fall, equity disappears, then income fails. Job losses are the real trigger.

Where is the pressure showing up in Australia?

Stress and arrears cluster rather than spread evenly. The common thread is borrowers who stretched to their limit, with small deposits, at high LVRs, during the 2020 to 2022 buying window.

Our coverage of S&P Global Ratings data put Pakenham in Victoria at the top, with 2.88 per cent of loans in arrears, as of June 2026. See the 139 suburbs on the arrears list. The list leans towards outer-suburban pockets in Victoria and New South Wales.

The same pattern appears in Sydney and Melbourne’s outer rings, covered in who is squeezed by suburban rate rises. Inner suburbs with more equity and higher incomes tend to absorb pressure better.

How can you tell stress from genuine distress in the market?

Separate the signals. Arrears are a lagging measure. Listings, days on market and price reductions move sooner. If arrears stay low while listings climb, that points to households choosing to sell early. If both rise together, that is the more worrying combination.

Our coverage of forced property sales separates situational sellers, such as relationship breakdown or relocation, from sales driven by repayment pressure. Not every forced sale signals systemic stress.

Check data from several sources, compare outer and inner suburbs, and treat any single month with caution.

What should buyers and investors check?

Test your own position before the market tests it for you. Work out repayments as a share of gross income, and ask how much room is left if rates rise again or one income stops. A household near or above 40 per cent has little space for a second shock.

For buyers, look at your LVR, your cash buffer and whether any fixed rate is about to roll over. A small deposit means little cushion if prices dip. Check whether an offset account or voluntary repayments could be redirected in a squeeze.

For investors, consider vacancy risk, rising ownership costs and how much equity you hold. Thin equity limits your exit options if you need to sell or refinance.

Latest coverage on this topic

Rules, rates and figures change. This guide explains how things work; confirm current settings with the relevant regulator, the ATO or a licensed professional before you act.

Stay across the next shift

Mortgage stress and arrears move slowly and unevenly, and the latest articles above track where they are moving. To get new analysis in your inbox, subscribe to the free newsletter.

General info, not financial advice.