Brisbane prices would need to fall 32pc to offset the new tax rules
Quarantining negative gearing removes a tax shield, so yield has to do the work on its own.
Most of what's circulated on the negative gearing changes since May has been shorthand: "negative gearing is gone," "investors are being taxed out of the market," or the reverse — "nothing's really changed, it's just politics." Neither is accurate, and the difference matters if you're advising a vendor, sizing up buyer demand, or just trying to explain to a client why fewer investors are showing up to open homes.
Here's what actually changed, what's still the same, and why it's already showing up in your buyer pool.
The mechanism: quarantined, not abolished
From 1 July 2027, an investor who buys an established residential property after 7:30pm on 12 May 2026 (Budget night) can no longer offset a rental loss on that property against their salary or other income. That's the headline most coverage stopped at.
What actually happens to the loss is more precise, and more important:
It doesn't disappear. It gets quarantined — set aside — and can only be used against rental income from other properties, or a capital gain when the property is eventually sold.
If an investor never generates enough offsetting rental income or capital gain, the loss effectively goes unused. For most normal holding periods, though, this is a timing shift, not a permanent loss of the benefit.
Three categories, not two:
Property Purchased Treatment
1) Established Before 12 May 2026 Fully grandfathered — old rules apply indefinitely
2) Established After 12 May 2026 Quarantined — losses offset only rental income or capital gains
3) New build Any time Fully exempt — unaffected regardless of purchase date
The cutoff is the property's acquisition date, not a portfolio-wide switch. An investor who already owns established properties keeps full negative gearing on those — but the next established property they buy drops straight into the quarantined bucket from day one.
It's settled law, not a proposal
The core reform — the Treasury Laws Amendment (Tax Reform No. 1) Bill — passed both houses of Parliament in late June 2026. It is not pending, and it is not a Budget announcement still working its way through consultation.
A second, narrower bill passed the Senate on 19 August 2026, but it doesn't touch the mechanism above. It's a technical fix — ensuring people who acquire a property through inheritance or a relationship breakdown aren't unfairly caught by the quarantine rules, and formalising the definition of a "new build" for exemption purposes. Further technical tranches are still in consultation, closing 21 August 2026, dealing with edge cases like foreign residents and trust structures. None of it changes the substance of what's above.
Why this is already thinning your buyer pool
Investor loan commitments fell 8.6 per cent in the June quarter — and the Budget was only handed down partway through that quarter, so the full effect hasn't shown up in the data yet.
Modelling published by Ray White chief economist Nerida Conisbee gives a sense of scale.¹ To make an established property genuinely cash-flow positive again under the new rules — where rental income covers the interest on an 80 per cent loan after costs — the combined capital cities would need a gross rental yield of around 6.5 per cent. Right now it sits at 3.95 per cent.
Closing that gap doesn't require rents or prices to move on their own — it's some combination of both. But the starting point varies sharply by city, and it matters for Brisbane specifically: at a 3.51 per cent yield, the lowest of any capital, Brisbane needs the steepest adjustment of anywhere in the country. Even with rents rising 20 per cent, modelled price falls of around 32 per cent would still be needed to reach that threshold here — worse than Sydney (28 per cent) and well above the national figure (27 per cent).
Those are modelled scenarios, not forecasts — nobody is predicting a 32 per cent price fall. What they describe is the scale of the gap currently sitting between where yields are and where they'd need to be for an established property to make sense as a leveraged investment under the new rules. Until that gap closes — through some mix of rent growth, price adjustment, or investors simply accepting lower after-tax returns — a meaningful share of investor demand has a real reason to sit on the sidelines.
What this means day to day
For a principal, this isn't an abstract tax story. It's a smaller pool of investor buyers under every established property currently listed, sitting alongside owner-occupier demand that isn't affected by any of this. It also means the conversation with an investor-vendor about why an offer is lower than eighteen months ago has a real, explainable mechanism behind it — not just "the market's soft."
It's also worth knowing where the exemption sits: new builds are untouched. If a client is deciding between an established property and a new build as an investment, that decision now carries a materially different tax outcome than it did in April.
None of this is advice on any individual's position — the right treatment depends on what's already owned, when, and how. If you're trying to work out what it means for a specific portfolio or a specific vendor conversation, that's worth a proper discussion rather than a LinkedIn comment thread. Send me a DM.
John King, B Bus FIPA FBAA Fellow of the Institute of Public Accountants · Peer Group Advisory
¹ Nerida Conisbee, Chief Economist at Ray White, "What mix of rent rises and price falls would make property investment stack up again?", LinkedIn, 19 August 2026. https://www.linkedin.com/feed/update/urn:li:activity:7495580371405766656/