What Is Mortgage Stress? Understanding the 30% Rule

Mortgage stress is the term used when a household's mortgage repayments become a disproportionately large share of their income — squeezing out money for essentials like food, utilities, transport, and healthcare. It's not just a financial metric; for the 1.3 million Australians currently affected, it's a daily reality of difficult trade-offs.

The 30% Threshold

The most widely used benchmark is the "30% rule" — a household is considered to be under mortgage stress when mortgage repayments exceed 30% of gross (pre-tax) household income. This isn't a hard scientific line, but it's the standard used by most industry commentators, media, and housing affordability researchers.

Roy Morgan, Australia's leading independent research company for mortgage stress data, uses a more sophisticated methodology that adjusts the threshold based on income level, household size, and essential spending patterns. Under their framework, lower-income households can enter stress at below 30%, while higher-income households may tolerate higher ratios due to larger discretionary spending buffers.

The 2026 Picture: Three Consecutive Rate Hikes

After the 2025 easing cycle that took the cash rate from 4.10% down to 3.60%, the RBA reversed course in 2026 with three consecutive +25bp hikes: 4 February (to 3.85%), 18 March (to 4.10%), and 6 May (to 4.35%). The trigger was a re-acceleration of inflation to 4.6% in the March quarter, driven largely by fuel-price shocks linked to Middle East tensions. The 6 May decision was an 8–1 split, with the Board signalling inflation is likely to remain above target for some time.

The latest Roy Morgan data paints a stark picture:

• 26.6% of Australian mortgage holders (1.319 million people) were at risk of mortgage stress before the May hike was passed through
• Up from 23.9% in January 2026 — before any of the 2026 hikes
• The full 75bp of 2026 hikes is likely to push the at-risk share back toward the 30%+ levels last seen at the June 2024 peak as lenders complete pass-through

Who's Most Affected?

Mortgage stress doesn't hit evenly. The most vulnerable groups include:

• Fixed-rate cliff borrowers: Those who locked in rates at 2-3% during 2020-2022 and have since transitioned to variable rates above 6%. The repayment shock can be $600-900+ per month.
• Recent buyers: Anyone who purchased at market peaks in 2021-2022, often with minimal deposits, now facing higher rates on large loans with limited equity.
• Single-income households: Families relying on one income are disproportionately affected, as there's no second earner to absorb higher costs.
• Regional borrowers: Some regional areas saw 30-50% price growth during the pandemic, attracting buyers who stretched budgets based on then-low rates.

Mortgage Stress by State

Stress rates vary significantly across Australia:

State	Stress Rate	Avg Mortgage	Median Income
TAS	29.5%	$420,000	$73,000
VIC	29.1%	$628,000	$89,000
QLD	28.3%	$545,000	$85,000
SA	27.8%	$445,000	$79,000
NT	26.2%	$390,000	$88,000
NSW	25.8%	$752,000	$98,000
WA	25.5%	$480,000	$102,000
ACT	21.4%	$590,000	$115,000

For detailed state-specific information including local counselling services and government programs, see our state-by-state breakdown.

What Can You Do About It?

If you're in or approaching mortgage stress, there are concrete steps you can take — and the earlier you act, the more options you have:

1. Test your position: Use our Mortgage Stress Calculator to see exactly where you stand against the 30% threshold.
2. Call your lender: Request a rate review. If that's not enough, ask about hardship provisions.
3. Explore refinancing: Our break-even calculator shows whether switching lenders makes financial sense.
4. Get free professional advice: The National Debt Helpline (1800 007 007) provides free, confidential financial counselling.
5. Check government support: State and federal government programs may be available for utility relief, hardship grants, or shared equity schemes.