New Build vs Established: What the 2026 Tax Changes Changed

One of the biggest levers in the property market right now isn’t a price movement. It’s a tax setting.

The 2026–27 Federal Budget drew a line between two kinds of residential property. Eligible new builds keep negative gearing and the 50% capital gains tax discount. Established property bought after 7:30pm on 12 May 2026 doesn’t. That’s not a small-print detail. It’s the government telling investors, in plain terms, where it wants capital to go.

I wrote recently about why this downturn might not follow the usual pattern, and about why rental yields are quietly doing more work than the price headline suggests. This piece ties both together, because the tax settings are now reshaping which side of the new-build/established line makes sense to be on.

What actually changed, in plain terms

Eligible new builds keep the current rules. Negative gearing and the 50% CGT discount both stay in place.

Established property bought after 7:30pm on 12 May 2026 is treated differently. From 1 July 2027, rental losses on it can only be offset against rental income or future rental gains, not against your salary. It also loses the 50% CGT discount.

What you already own is grandfathered. Property owned, or under contract, before the announcement stays under the old rules. Check the date on your contract before assuming which rules apply to you.

Why this is a structural shift, not a talking point

Governments adjust settings around the edges of the property market all the time. Most of it is noise. This one is different, because it changes the after-tax case for two categories of the same asset class, from a fixed date, for as long as you hold.

It also lands on top of a supply shortfall, not instead of one.

Completions are running well below the 240,000 a year the National Housing Accord needs, and approvals aren’t closing the gap. Sources: National Housing Supply and Affordability Council (March 2026), ABC News (August 2026), ABS (July 2026).

What this looks like on the ground

This fortnight I scored 24 suburbs, and one stood out: Southport, on the Gold Coast, where new-build apartments passed my scorecard. Vacancy is around 1% (SQM Research, August 2026) and unit rents are up about 4.6% over the year (SQM Research, September 2026).

The tax settings aren’t why it passed. The fundamentals are. But this is exactly the situation the new rules reward: a new build in a tight rental market, where the numbers stand up on their own and the tax treatment is a bonus, not the reason. See the full Southport suburb validation.

What this means for your next decision

The practical question isn’t “new build or established” in the abstract. It’s two narrower questions. Is the established property you’re looking at priced for the tax disadvantage it now carries? And would the new build you’re looking at stack up on fundamentals even without the tax advantage?

A new build still has to pass the same checks I run on everything: the supply pipeline around it, whether population and infrastructure growth is real, the land-to-asset ratio, the builder’s track record, and whether the numbers hold up if the rate cut everyone’s hoping for doesn’t arrive.

If you’re weighing up a new build, my guide to buying new construction and my off-the-plan apartments guide cover what to check before you sign.