Mortgage Stress in Australia 2026: The 10 Postcodes Most at Risk

Roy Morgan's March 2026 mortgage stress data put 26.8% of Australian mortgage holders — about 1.45 million households — into what they classify as "at risk" (paying more than 30% of after-tax income on repayments). The headline number is real, but the geographic story is more interesting than the headline. The postcodes carrying the most stress in 2026 are not the outer-growth corridors that dominated the 2008–2012 narrative. They are premium harbourside Sydney and the upper end of the inner Melbourne market.

We pulled mortgage stress percentages, median monthly repayments and median household income for every Australian postcode using PropPulse's ABS-derived dataset, then ranked them. Here is what the 2026 distribution actually looks like.

The national baseline

For context: in March 2022 — before the RBA started its tightening cycle — only ~13% of mortgage holders were classified at risk. The cohort has roughly doubled in three years. The peak hit 1.62M in late 2024; the easing since the November 2025 cut has only retraced part of it.

The official ABS definition of mortgage stress is more specific than the Roy Morgan one: "30% or more of household income spent on mortgage repayments" (the 30/40 rule, often qualified by also being in the bottom 40% of income distribution). PropPulse uses the cleaner 30%-of-income cut, postcode-level — same methodology applied uniformly across all 2,642 Australian postcodes with sufficient ABS Census 2021 data.

The 10 most stressed postcodes

Sorted by share of mortgaged households spending more than 30% of income on repayments. State means in NSW were $7,423/month for an estimated median-property mortgage at current rates; in VIC $4,287; in QLD $5,390.

Eight of the top 10 are in NSW. Four are in the Sydney harbourside premium ring (Vaucluse, Mosman, Bondi, Crows Nest). Three are in the outer Hills District (West Pennant Hills, Kellyville, Baulkham Hills). Two are inner-city units / townhouse markets (Surry Hills, Albert Park). Toorak rounds out Melbourne's contribution.

The counterintuitive part

Conventional commentary frames mortgage stress as an outer-suburb problem — first-home buyers stretched on a 90% LVR loan in Werribee or Schofields. The 2026 data does not support this. The Western Sydney and Melbourne growth corridors look like this:

Outer Melbourne growth corridors are running mortgage stress in the 9–13% range. That is one third of the national average and one fifth of Vaucluse. Outer Sydney is higher (17–25%) but still well below the premium ring.

Why? Three things compound:

• Loan size matters more than rate. A 6% rate on a $400k loan ($2,099/mo) is much more comfortable than 6% on a $1.5M loan ($7,500/mo) — even if the second household earns 3× more.
• Outer-corridor buyers self-select for affordability. Median Hoppers Crossing or Werribee buyers in 2024–25 took loans sized to their income, often with help from FHB grants and stamp duty concessions. Premium-suburb buyers stretched.
• Income concentration in premium suburbs is high but variable. Vaucluse averages well, but the median mortgaged household has a more normal income — and a $4,500/mo repayment consumes a much larger share of it than the headline suburb income would suggest.

The 10 least stressed postcodes

Same ranking, opposite end. These are postcodes where the math just works — affordable property, decent local incomes, often regional QLD or VIC growth fringe.

The pattern: $1,599–$2,099 monthly repayments on properties under $600k, with median household incomes in the $70–95k bracket. Mortgages that fit. The Melbourne CBD postcode is interesting — it's mostly small apartments owned outright by retirees or investor-owned, so the mortgaged cohort is tiny and well-resourced.

The state-level pattern

NSW dominates the stress list because three things stack: the highest median property prices, the largest mortgages, and the largest gap between asset value and median income. The state mean estimated repayment for a median-priced property at current rates is ~$7,423/mo — 73% higher than VIC ($4,287/mo) and 38% higher than QLD ($5,390/mo).

Victoria looks healthier on aggregate but has bifurcation: Toorak and Albert Park sit at 49–54% while Werribee and Cranbourne sit at 9–13%. The state average is dragged down by the volume of growth-corridor owners with reasonable repayments.

QLD, WA and SA largely sit in the 8–25% band — affordable enough that even with the rate hikes the median mortgaged household is not stretched. This matches the Roy Morgan finding that QLD and WA have improved mortgage stress year-over-year while NSW has worsened.

What this means if you're buying

• Don't use the suburb's median income to size your loan. Premium-suburb medians are skewed by outright owners. The mortgaged cohort often earns less than the headline number suggests. Use your own income, then stress-test against a 7%+ assessment rate (which is what banks now use).
• Buying in the outer corridors is statistically safer right nowthan buying at the upper end of the harbour. That's not advice on where to buy — it's an observation about which households actually got stressed by the rate cycle.
• FHB grants and stamp duty concessions correlate with low stress. The corridor postcodes with the lowest stress are also the ones where most buyers used FHB schemes — the schemes effectively pre-filter buyers into properties they can sustain. Run a per-postcode FHB lookup before you commit.

What this means if you're investing

• Vendor pressure is concentrated in NSW premium and Hills District.If your buying strategy involves stressed-vendor discounts, that's where to look in 2026 — Vaucluse, Mosman, Bondi, West Pennant Hills, Kellyville. Listings in these suburbs where the agent volunteers "motivated vendor" or "divorce sale" are worth a hard look.
• Low-stress postcodes have lower exit risk.If you're buying for cashflow, the low-stress corridor suburbs (Hoppers Crossing, Cranbourne, Logan, Cairns) won't produce the forced-sale discount on entry — but they also won't produce the cascading vacancies / price drops if the next downturn hits. Tenants in those areas are mostly local-employment, less rate-sensitive.
• Premium-suburb yield is even worse than it looks. Vaucluse's gross yield is around 1.7%; on top of that, the mortgaged-owner cohort is stressed enough that landlord competition for tenants is about to intensify if a softening continues. The cashflow-positive playbook favours the opposite end of this list.

Methodology + sources

Mortgage stress percentage — share of mortgaged households in each postcode whose median monthly repayment exceeds 30% of median monthly household income. Sourced from ABS Census 2021 G34 (mortgage repayments) and G02 (household income), updated when ABS publishes refreshes.

Median monthly mortgage — ABS Census 2021 G34 median monthly mortgage repayment for owner-occupier mortgaged households, per postcode.

State estimated mortgage— model estimate for a loan sized to the state's mean dwelling price (ABS RES_DWELL, Q4 2025) at current variable rates (~6.05%), 80% LVR, 30-year P&I. This is the "what would today's buyer pay" figure rather than the historical ABS-recorded figure.

National stress baseline— Roy Morgan Single Source survey, March 2026 wave. Roy Morgan's definition is slightly broader than ABS — they include after-tax income tests at 25% / 30% / 45% bands. The 26.8% / 1.45M figure used here is the "at risk" band.

Cash rate context — RBA target cash rate as of May 2026 (4.10%), down from the November 2024 peak of 4.35%. Median owner-occupier variable rate of ~6.05% reflects the ~1.95% bank margin currently being applied.

See the data for any postcode

Mortgage stress, median repayment, and household income breakdown are in every full PropPulse postcode report. To check a specific suburb, sign up free — one full report unlocked, no card required. To compare across postcodes (filter by stress < 15% to find the safest, or sort by stress descending to find vendor-pressure markets), the Postcode Explorer on the Investor tier surfaces all 2,642 in one sortable table.

For the broader investment-grade methodology that combines stress with yield, SEIFA, and dwelling diversity into a single 0–100 score, see the Investment Score breakdown.