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34%. That figure — Westpac's projected drop in new investor activity entering Australia's $12.6 trillion residential property market — landed with almost no ceremony when analysts published their May 2026 housing forecast update. But as of June 25, 2026, it may be the single most consequential number shaping where Australian property prices head over the next 18 months.
As reported by Google News, drawing on Westpac IQ's detailed forecast methodology and Australian Government Budget 2026-27 documentation, the market is simultaneously absorbing two seismic shifts: sweeping negative gearing and capital gains tax reforms announced in the May 12, 2026 Federal Budget, and an RBA cash rate sitting at 4.35% following hikes in February, March, and May 2026. Westpac's analysis projects a 20% decline in total housing market turnover as a direct result — while splitting the country's property landscape into dramatically divergent city-level outcomes.
The Dual Shock — Budget Reforms Meet an Aggressive Rate Cycle
The policy change at the centre of this is the Albanese Government's decision to eliminate negative gearing deductions — where property investment losses are offset against wage income — on existing properties purchased after May 12, 2026, effective July 1, 2027. Critically, existing investors are fully grandfathered; their deductions remain untouched. The Australian Government Budget 2026-27 documentation also clarifies that losses on established properties can still be offset against residential rental income or carried forward indefinitely. Only the ability to deduct those losses against wages disappears under the new rules.
Alongside this, the capital gains tax discount structure shifts from a flat 50% reduction to an inflation-based system with a 30% minimum tax rate, also taking effect July 1, 2027. For long-hold investors in high-growth cities, this materially increases the tax payable on eventual sale.
Westpac's analysis notes that “grandfathering for existing investors limits near-term impacts,” while an exemption for newly built dwellings “will make this a more attractive option for investors.” The policy is, in effect, an attempt to redirect investor capital from established housing stock toward new construction — a wager that changing tax incentives can reshape where development capital actually flows.
Layered on top is a rate environment that has already compressed borrowing power significantly. As of June 25, 2026, the RBA cash rate stands at 4.35%, and each 25 basis point (a 0.25 percentage point move) hike strips approximately $12,000 from an average-income earner's borrowing capacity. Westpac forecasts two more rate increases from here, while CBA, NAB, and ANZ all expect the rate to hold. NAB's Chief Economist captured the divergence plainly: “We have greater conviction that the next move in rates is down, but less conviction on the timing.”
The combined effect on market sentiment has been immediate. As of June 25, 2026, national weekend auction clearance rates have dropped below 50% — the lowest reading since the pandemic — in the single month following the tax announcement. Investor lending, which had surged 64% from early 2023 lows on the back of tight rentals and strong capital gains, has stalled sharply.
The Submarket Reality — Four Markets Inside One Country
The national average will tell you almost nothing useful here. Westpac's city-by-city forecast through 2026-27 shows a country where mid-size capitals are running hot while the two largest cities have already rolled over:
Chart: Westpac's city-by-city dwelling price forecast for 2026–27. Green bars indicate projected price growth; blue bars show projected declines. National average: flat.
Perth's 13% forecast reflects persistent undersupply compounded by ongoing interstate migration. Brisbane at 9% and Adelaide at 7% are riding similar structural tailwinds that the investor tax changes are unlikely to derail in the near term — newer stock in these markets is more likely to qualify for the new-build exemption anyway.
Sydney and Melbourne's projected declines — 3% and 4% respectively — sit atop a valuation gap that makes these cities structurally vulnerable to rate sensitivity. As of June 25, 2026, houses are trading at a 36% overvaluation premium against historical norms, while units carry a far more modest 9% overvaluation. That wedge is critical for anyone navigating a purchase decision: houses face the heaviest exposure to any correction, particularly in the two major capitals where investor demand has historically skewed toward established dwellings.
Market analysts have been direct about what this means: “Australia no longer has one housing market — it has four, with mid-size capitals running hot while Sydney and Melbourne have rolled over.” Bloomberg's reporting on the reform also flagged that economists broadly expect price softening in the major capitals, though the precise depth of decline remains a point of divergence between forecasters.
Where Investor Capital Is Redirecting
One underreported consequence of the reforms is the cross-sector capital redirection effect. According to PropTrack's Westpac Investor report, Melbourne investor enquiry levels jumped significantly through 2025, with the city dominating suburbs recording the largest increases in investor interest before the tax changes were announced. That pre-announcement surge has now reversed sharply.
One destination for that capital: commercial property. Because the negative gearing reforms apply exclusively to residential real estate, commercial assets — office buildings, industrial warehouses, retail — remain fully deductible and are drawing fresh attention from investors recalculating their residential exposure. This cross-sector shift isn't captured in most standard housing forecasts, but it represents a meaningful secondary effect of targeting only one asset class with the policy overhaul.
The other pressure valve is the new-build exemption. Westpac's analysis models an increase in investor demand for off-the-plan apartments and house-and-land packages specifically because the tax treatment now favors them materially over established homes. Whether that shift translates into enough new supply to meaningfully ease rental affordability — the stated policy goal — remains the central bet to watch through 2027.
How PropTech Is Navigating the Complexity
The tax changes have materially increased the analytical complexity of property investment decisions. Modeling after-tax returns now requires factoring in inflation adjustments to the capital gains calculation, the 30% minimum tax rate, hold-period assumptions, and whether a given property qualifies for the new-build exemption — variables that interact in ways that shift projected outcomes significantly depending on the city and entry price. As of June 25, 2026, 37% of PropTech firms are actively deploying AI and machine learning tools for property valuation and investment analysis, according to sector data cited in Westpac's research.
Platforms like PropHero and Archistar are positioning directly into this complexity gap, offering data-driven scenario modeling across property types and locations that would take days to run manually. The PropTech sector is growing at a 38% compound annual growth rate, driven in part by the digitization of mortgage and lending processes. When tax rules shift this substantially, AI real estate tools that can model the full after-tax return picture — not just gross yield — earn their keep in a way that simpler calculators cannot.
Bottom Line — Where to Focus This Quarter
For buyers, the signal is directional rather than uniform. Perth, Brisbane, and Adelaide retain favorable supply-demand dynamics, and the tax changes carry limited near-term impact on investor behavior in those markets given the grandfathering provisions and the prevalence of newer stock. In Sydney and Melbourne, the combination of rate-driven borrowing compression, structural overvaluation in the house segment, and reduced investor demand creates a buyer's window — but only for those with the holding power to absorb continued near-term softness. The 20% projected decline in total housing market turnover means fewer comparable sales, which complicates both pricing and the financing process.
For prospective investors: the grandfathering provision means anyone already holding residential property faces no immediate change to their deductions. Anyone entering after May 12, 2026 on an established property should model returns under the new CGT structure before committing. The new-build exemption creates a genuine — not merely tactical — incentive to look at newly constructed options, particularly in cities where rental yields remain strong relative to purchase prices.
In my analysis, the most underpriced risk in the current environment isn't the tax reform itself — it's the interaction between reduced turnover and tighter bank valuations. When fewer transactions occur, lenders become conservative on comparable sales data, which can compress approved loan values even when the headline cash rate stays flat. That feedback loop is what could push Sydney and Melbourne beyond Westpac's current projections if the rate cuts the market is waiting for fail to materialize before mid-2027.
Frequently Asked Questions
Will Australian house prices fall across the country in 2026 and which cities are most at risk?
Not uniformly. As of June 25, 2026, Westpac forecasts a flat national average for dwelling prices, masking sharp divergence: Sydney is projected to fall 3% and Melbourne 4%, while Perth is forecast to rise 13%, Brisbane 9%, and Adelaide 7%. The biggest risk falls on established houses in Sydney and Melbourne, where a 36% overvaluation gap versus just 9% for units leaves them most exposed to reduced investor demand and rate sensitivity.
Can I still negatively gear an investment property in Australia after the 2026 budget changes?
Yes, but the rules now depend on what you buy and when. The Federal Budget announced May 12, 2026 eliminates negative gearing against wage income for existing (established) properties purchased after that date, effective July 1, 2027. Properties purchased before May 12, 2026 are fully grandfathered. Newly built dwellings are exempt from the changes and retain full negative gearing treatment. Losses on established properties can still be offset against rental income from other properties or carried forward — they simply cannot be deducted against wages under the new framework.
When will the RBA cut interest rates and what does it mean for Australian mortgage holders?
As of June 25, 2026, the RBA cash rate stands at 4.35% following hikes in February, March, and May 2026. The major banks are split: Westpac forecasts two additional 25 basis point increases, while CBA, NAB, and ANZ expect the rate to hold from here. NAB's Chief Economist has stated publicly that there is “greater conviction that the next move is down, but less conviction on the timing.” Each 25 basis point hike reduces an average-income earner's borrowing capacity by approximately $12,000, so the rate path has direct implications for how much buyers can borrow. No major institution is currently forecasting a 2026 rate cut.
Disclaimer: This article is for informational purposes only and does not constitute financial or real estate advice. All statistics and forecasts reflect publicly reported information as of the date of publication. Research based on publicly available sources current as of June 25, 2026.