The 2026 federal budget delivered the biggest change to property taxation in more than a quarter of a century.

Treasurer Jim Chalmers confirmed two major reforms: negative gearing on established residential properties will be restricted from 1 July 2027, and the current capital gains tax discount will be replaced with a new model. 

The headlines have been dramatic, but the reality is more nuanced. For many Australians thinking about selling their home, the direct impact may be smaller than they think.

Here's a breakdown of what changed, who it affects, and what it could mean for the market.

What actually changed

Negative gearing is where an investor's rental costs exceed their rental income, producing a loss they can currently deduct against other income like their salary to reduce their tax bill. 

From 1 July 2027, that deduction will only be available for newly built properties. Investors who buy established homes after that date can still carry their losses forward and offset them against future rental income or capital gains. The tax benefit isn't abolished; it's quarantined.

Capital gains tax applies when you sell an investment asset for more than you paid for it. Currently, investors who hold a property for more than a year receive a 50 per cent discount on that gain before paying tax. 

From 1 July 2027, that flat discount is replaced with cost-base indexation, meaning only the real gain above inflation is taxed, alongside a new 30 per cent minimum tax rate on those gains.

Two dates matter. Any property already owned or under contract at 7:30 pm AEST on 12 May 2026 is fully grandfathered under the old rules. The new rules take effect on 1 July 2027, with a grace period in between.

Does this affect you if you're selling your home?

For the vast majority of Australians selling their primary residence, the answer is no.

The main residence CGT exemption, the rule that means you pay zero capital gains tax when you sell the home you live in, is completely untouched. 

As CBA Senior Economist Trent Saunders confirmed in his post-budget analysis, "the main residence CGT exemption and superannuation tax arrangements are not affected."

These changes target investment properties, not family homes. If you own one property and you live in it, nothing about your sale changes.

If you also own an investment property you're thinking of selling, the picture is more complex. Gains accrued up to 1 July 2027 will be taxed under the old rules and gains after that date under the new model, which means you'll need a valuation to draw that line. 

What could happen to property prices

This is where the independent analysis matters more than the political noise.

CBA's Saunders modelled the combined impact of both changes and found that "house prices are expected to be just under 3% lower than they otherwise would have been." 

Importantly, that's not a projected 3 per cent fall. It's a modest drag on where prices would otherwise have ended up, playing out gradually over several years. His modelling estimates the peak drag on annual price growth at around 1 percentage point.

He also updated CBA's overall dwelling price growth forecast to 3 per cent for the year to December 2026, down from 5 per cent. Of that 2-point downgrade, 1.5 points come from this year's three rate hikes and just 0.6 points from the budget's property tax changes. 

As Westpac Economics noted in its budget analysis, "in the short term, the interest rate environment will be a more consequential influence" on the housing market than these tax reforms.

Saunders also flagged a risk worth knowing about: "there is a risk that house prices respond more sharply in the short term due to shifts in sentiment." If uncertainty weighs on buyer and investor confidence beyond what the fundamentals would suggest, the impact could be larger in the near term before stabilising.

Independent property economist Cameron Kusher made an observation worth keeping in mind. With investment in established housing now less tax-advantaged, owner-occupied housing becomes one of the only remaining asset classes in Australia that is completely capital gains tax-free. 

"Individuals that may have invested elsewhere will probably now consider a better investment option being a major renovation to add value to their home or buying a better and more expensive property," he wrote.

What it means for investors

For existing investors with grandfathered properties, negative gearing is unchanged. The CGT split-date calculation does apply, and obtaining a valuation before 1 July 2027 is worth discussing with a financial adviser.

For anyone buying a new investment property from 1 July 2027 onwards, the rules change materially. Losses on established properties can no longer offset salary income, though they can be carried forward. 

Kusher was direct about the longer-term implications: "these changes are likely to see housing prices moderately lower than they would have been under the status quo, and over the longer-term fewer investors when rental vacancy rates are already at historic lows and net overseas migration is historically elevated, is likely to see the cost of renting increase."

New builds remain fully negative geared, and investors purchasing new properties also get to choose between the old and new CGT models at the time of sale. The government's intent is clear: invest in new supply, and the tax incentives follow.

The longer-term picture

The structural forces that have underpinned Australian property values for decades remain firmly in place. Undersupply is chronic, population growth is elevated, and construction costs continue to climb, all of which support established home values even as new rules reshape the investment landscape.

The budget also includes $2 billion for housing infrastructure and $500 million to streamline planning approvals, both aimed at generating new supply over the medium term.

For sellers navigating an already-shifting market, the advice hasn't changed: realistic pricing and an experienced local agent matter more than trying to time policy cycles that will play out over years, not months.