The tax settings that shaped a generation of Australian property investment are changing. Based on the May 2026 Federal Budget announcement, from May 2027 rental losses on newly purchased investment property will no longer offset your salary year to year, and the 50% capital gains discount is set to be replaced with CPI indexation of your cost base. The measures remain subject to the passage of legislation, but investors buying now are already buying into the new regime's timeframe.
Here's the practical version: what actually changes, what it does to the numbers, and what to model before your next purchase.
What the announced changes actually do
Two mechanisms matter for residential investors.
Rental losses stop offsetting salary. Under the announced measures, a rental loss on a property purchased after the commencement date can no longer be deducted against your employment income each year. Instead, losses accumulate in a carry-forward pool. That pool isn't lost: it offsets future rental profits, and whatever remains offsets the capital gain when you sell. The deduction still exists; the timing moves from every payday to the end of the story.
The CGT discount is replaced with indexation. Rather than halving your capital gain after twelve months of ownership, the announced approach indexes your cost base by CPI. On a property that grows faster than inflation, that generally means more taxable gain than the old 50% discount would have produced. On a property that barely beats inflation, indexation can be kinder. The dispersion between good and mediocre assets gets wider in after-tax terms.
Why this widens the gap between a good deal and a dud
Under the old settings, the annual tax refund softened a marginal deal. A property running $150 a week negative might have felt like $90 a week after the offset landed. From May 2027, on a new purchase, the full holding cost hits your cash flow every week, and the tax relief arrives years later, when there's rental profit or a sale to absorb it.
That changes deal selection more than it changes whether to invest. The property that was borderline under the old rules is now plainly expensive to hold. The property with strong rent, sensible price and a real growth thesis still works, and arguably works better relative to the competition, because the market's tolerance for mediocre stock is being repriced.
This is why every analysis I run is modelled under the post-May 2027 rules, not the 2024 ones. Most agents still quote the old numbers. The gap between those two models is often the difference between a yes and a no on the same property.
The three numbers to model before you buy
True weekly holding cost, unassisted. Rent minus interest, rates, insurance, management and maintenance, with no tax offset in year one through five. If that number makes you uncomfortable, the deal needs a better price, better rent, or it isn't the deal.
The carry-forward pool at year ten. Losses accumulating in the pool are real value, but they're deferred value. Model when your property turns rental-profitable and starts consuming the pool, and what remains against the eventual sale.
The indexed-cost-base sale. Take a realistic growth rate, index your cost base at CPI, and compare the taxable gain against what the 50% discount would have produced. This is the honest way to compare buying now versus waiting, and it changes which properties you should prefer: assets with genuine above-inflation growth prospects justify the new regime; low-growth "cheap" stock does not.
What this means by investor type
If you're buying your first investment property, the change is mostly protective: it forces the holding-cost conversation before you buy rather than after. If you hold existing property, purchases made before commencement are expected to keep their current treatment, which makes the sequencing of any next purchase worth thinking about carefully. If you're weighing residential against commercial, note that commercial property's higher net yields mean many commercial assets never relied on negative gearing at all, which is part of why more residential investors are graduating to commercial.
Model it before you buy anything
The point isn't that property stops working from May 2027. It's that the maths does the sorting now, and the investors who model it will quietly buy the good assets while everyone else argues about the politics.
Two ways I can help you do that. The Cash Flow Check is a free two-minute self-test: eight questions on whether your next purchase stacks up under the new rules. And on a strategy call, I build the full post-May 2027 cash flow model on a real shortlist, free, before you commit to anything. If the numbers don't say yes, you don't buy.
Frequently asked questions
Do the 2027 changes apply to property I already own?
Under the announced measures, existing holdings and purchases made before commencement are expected to retain their current treatment. The changes as announced apply to properties purchased after the commencement date. Final scope depends on the legislation as passed.
Is negative gearing being abolished?
Not in the sense most headlines suggest. Rental losses remain deductible, but against future rental profits and the eventual capital gain rather than against your salary each year. The deduction changes timing, not existence.
Does the change affect SMSF property?
As currently drafted, the announced measures target personally held property. Superannuation structures are treated separately, and the rules there have their own recent changes. A licensed SMSF specialist is the right person for fund-specific questions; the 7-Test Scorecard is a free first screen.
Should I buy before May 2027?
Sequencing matters, but a mediocre property bought to beat a deadline is still a mediocre property. The better question is whether a specific deal stacks up under the rules it will actually live under. That's a modelling exercise, not a calendar one.
