Not a 'red line': The problem with Australia’s mortgage stress measure
SBS News
•Mon, 10 Aug 2026 19:37:01 +0000
📰 What Happened
New research from financial comparison platform Finder found 55% of mortgage holders in Australia experience mortgage stress, with borrowers devoting an average of 38% of after-tax income to monthly loan repayments. The study surveyed about 1,000 Australians in July, including 291 current borrowers. Experts argue the conventional 30:40 mortgage indicator used to define mortgage stress is oversimplified and not a rigid 'red line'.
🔍 The Backstory
Mortgage stress is commonly defined as households spending more than 30% of income on mortgage repayments, a benchmark some experts say is a simplified way to measure housing affordability. The Finder report highlighted generational and gender disparities in who bears housing-cost burdens. Rising interest rates and high house prices have pushed many borrowers deeper into repayment strain.
🎯 Why It Matters
The 30:40 rule is widely used by lenders, regulators and policymakers to gauge housing affordability and risk. Challenging that benchmark affects how mortgage stress and financial vulnerability are measured and addressed. Elevated stress among over half of borrowers has significant implications for household wellbeing, economic stability and housing policy.
New research from financial comparison platform Finder found 55% of mortgage holders in Australia experience mortgage stress, with borrowers devoting an average of 38% of after-tax income to monthly loan repayments. The study surveyed about 1,000 Australians in July, including 291 current borrowers. Experts argue the conventional 30:40 mortgage indicator used to define mortgage stress is oversimplified and not a rigid 'red line'.
Mortgage stress is commonly defined as households spending more than 30% of income on mortgage repayments, a benchmark some experts say is a simplified way to measure housing affordability. The Finder report highlighted generational and gender disparities in who bears housing-cost burdens. Rising interest rates and high house prices have pushed many borrowers deeper into repayment strain.
The 30:40 rule is widely used by lenders, regulators and policymakers to gauge housing affordability and risk. Challenging that benchmark affects how mortgage stress and financial vulnerability are measured and addressed. Elevated stress among over half of borrowers has significant implications for household wellbeing, economic stability and housing policy.