Negative Gearing Changes 2027: Established vs New Build — What Investors Need to Know

The May 2026 Budget drew a line at 7:30pm on 12 May 2026. Properties you owned or had under contract at that moment are untouched — negative gearing continues as before. Properties you buy after that moment will, from 1 July 2027, have their rental losses quarantined: no longer deductible against your salary or other personal income.

This isn't the abolition of negative gearing — it's a structural change that turns rental losses into a deferred benefit rather than an annual cash refund. For most investors in established properties purchased after Budget night, the change is meaningful but not catastrophic. For investors comparing established property to new builds, it changes the calculus significantly.

Legislative status: As at June 2026, this measure has been introduced to Parliament but has not received royal assent. This article reflects the announced policy. Monitor the ATO's new legislation page for updates.

The key dates in one table

Date	What it means
7:30pm AEST 12 May 2026	Cut-off for grandfathering. Owned or under contract at this moment → full negative gearing continues indefinitely
After 12 May 2026	Established residential properties purchased from here are subject to new rules
1 July 2027	New rules take effect. Quarantining begins for eligible established properties
1 July 2027	New build exemption also starts — negative gearing on new builds remains fully available

Properties don't "change status" when the rules start. A property purchased on 1 June 2026 still has 13 months of normal negative gearing (July 2026 to June 2027), then quarantining begins on 1 July 2027.

What quarantining actually means

Under the current rules, if your property generates a rental loss (expenses exceed income), that loss offsets your salary or other income, reducing your tax bill dollar-for-dollar at your marginal rate.

Under quarantining, that same rental loss cannot be offset against salary. Instead:

Quarantined losses can only be used against:

Rental income from any Australian residential investment property (yours or from future purchases)
Capital gains arising from the sale of a residential rental property

Losses that can't be used in the current year are carried forward indefinitely until there's enough rental income or a capital gain to absorb them.

The key practical consequence: you lose the annual cash refund, but the losses don't disappear. You still get the benefit — just not until you sell the property or have enough rental income to absorb it.

Use our Negative Gearing Calculator to model your annual cash position and tax saving under current rules.

Who is grandfathered — and what that means

If you owned a residential investment property, or had unconditionally exchanged contracts to purchase one, at 7:30pm AEST on 12 May 2026:

Your property is permanently grandfathered
You continue to deduct rental losses against salary for as long as you hold the property
When you sell, the grandfathering ends — a new purchase would be subject to the new rules

There is no time limit on grandfathering. A property you owned in 2026 that you still hold in 2035 still gets full negative gearing deductions under the old rules. The grandfathering follows the property, not the owner — if you sell it, the buyer gets the new rules.

Under contract at the cut-off: Properties where contracts were unconditionally exchanged before 7:30pm 12 May 2026 are grandfathered even if settlement occurs after that date. A contract exchanged at 5pm on 12 May 2026 that settles on 15 June 2026 is grandfathered.

What counts as a "new build" — and who keeps full negative gearing

Eligible new residential dwellings are exempt from quarantining. Investors who buy a qualifying new build can still deduct rental losses against salary from 1 July 2027, exactly as the old rules allow. They also retain the right to choose between the old 50% CGT discount or the new indexation method when they eventually sell.

Qualifying as a new build:

The government has listed eligible properties including:

Newly constructed apartments purchased off-the-plan
Duplex or multi-dwelling developments on previously developed land (where the original dwelling is demolished)
Any residential construction built on previously vacant land
A newly built property that has been occupied for less than 12 months before being first sold

Not qualifying as a new build:

Existing properties with extensions or renovations — even substantial ones
A property that was occupied for 12 months or more before being first sold
An established property you subdivide and partially redevelop

The precise legislative definition will be confirmed in the final legislation — the exposure draft refers to "new residential dwelling" and the government has indicated the ATO will issue a legislative instrument with further detail. If you're evaluating a specific property, check with a solicitor or tax adviser once final legislation is available.

The maths: established (quarantined) vs new build

Scenario: $750,000 property, $600,000 loan at 6% interest, $30,000 annual rent growing at 3.5% p.a. Investor on 39% effective marginal rate (37% + 2% Medicare, $150,000 income). 10-year hold.

Under current rules (grandfathered established property or new build):

Year 1 rental loss: approximately $8,000 (interest $36,000 − rent $30,000 = $6,000 loss, plus management, rates, insurance: ~$8,000 total)

Annual tax refund in year 1: $8,000 × 39% ≈ $3,120/year (declining as rent grows and loss narrows)

Present value of tax benefit over 10 years (discount rate 5%): approximately $19,000–$25,000

Under new quarantining rules (established property, post–12 May 2026 purchase):

Annual rental losses accumulate as carried-forward deductions. They can only be used when:

The rental income exceeds expenses (positive cashflow years), or
You sell the property and apply accumulated losses against the capital gain

If the property is sold in year 10, the quarantined losses (~$80,000 cumulative) reduce the capital gain by $80,000, saving approximately $31,200 in CGT (at 39% marginal rate, after the transitional rules).

Present value of that deferred benefit (receiving it in year 10, discounted at 5%): approximately $19,000

The real-world impact: The tax benefit doesn't disappear — it is deferred. The present value of deferred losses received at year 10 vs receiving them annually is approximately 25–30% less due to the time value of money. On a typical negatively geared property with an 8–10 year hold, quarantining reduces the effective tax benefit by roughly $5,000–$10,000 in present value terms.

The double impact: quarantining + CGT changes together

Investors who buy established properties after 12 May 2026 face changes on two fronts:

1. Negative gearing losses quarantined from 1 July 2027 Losses can't offset salary — deferred until rental income or capital gain.

2. No choice on CGT from 1 July 2027 For the post-2027 portion of gains, established investment properties must use the new CPI indexation method. New builds can choose between the old 50% CGT discount OR the new indexation — whichever produces a better result.

In a low-inflation, high-growth environment, the 50% discount (available to new build owners) is more generous than CPI indexation. The ability to choose gives new build investors a meaningful advantage.

For investors comparing a $750,000 established property and a $750,000 new build at equivalent prices, the combined effect of quarantined negative gearing plus loss of CGT discount choice makes the established property meaningfully less tax-efficient for post-Budget-night purchasers.

Should you still buy established property after 12 May 2026?

The answer depends entirely on the individual property and what you're comparing it to.

Established property still makes sense when:

The specific property has strong fundamentals (location, rental yield, growth potential) that a new build in the same area can't match
The rental yield is already positive or near-positive — quarantining only matters if you have losses to quarantine
You plan to hold for 10+ years, by which point the rental income often exceeds expenses (positive cashflow)
You're buying the property for capital growth primarily, and the CGT change impact is acceptable given the property's growth prospects
You're buying through a super fund or widely held trust — these are exempt from quarantining

New build often makes more sense now when:

You're choosing between comparable established and new properties at similar prices
You're negatively geared significantly (high loan, low yield) and the annual cash refund was important to your cashflow model
You're in the 37% or 45% bracket — the annual tax saving is large enough that deferring it materially hurts your cash position
You want the CGT choice (50% discount or indexation) when you eventually sell

The thing most commentators miss: Quarantining doesn't change the fundamental investment proposition — the property's rental yield, capital growth prospects, and demand drivers. It changes one input in the tax calculation. A mediocre new build bought purely for the tax treatment is still a mediocre investment; a great established property in a strong location is still a great investment.

What if you already bought established property after 12 May 2026?

If you've settled or exchanged contracts on an established residential investment property after 7:30pm 12 May 2026, you'll be subject to quarantining from 1 July 2027 (assuming the legislation passes).

Practical steps:

Continue claiming deductions normally for 2025-26 and 2026-27 (current rules apply until 1 July 2027)
Ensure your tax agent is tracking cumulative quarantined losses from 1 July 2027 onward
Review whether a PAYG withholding variation still makes sense — it does if you have income from grandfathered properties that can absorb the losses; less so if all properties are post-May 2026 established purchases
Factor the quarantined loss carry-forward into your eventual sale modelling

Frequently asked questions

What is the cut-off date for grandfathered negative gearing?

The cut-off is 7:30pm AEST on 12 May 2026 (Budget night). Properties owned or where unconditional contracts were exchanged at or before that moment retain full negative gearing indefinitely. Properties purchased after that time will have losses quarantined from 1 July 2027.

What does "quarantined" mean for rental losses?

Quarantined losses cannot be deducted against salary or other personal income. Instead, they can only be offset against residential rental income (from any property you own) or capital gains from selling a rental property. Losses not used in the current year carry forward indefinitely until there is enough rental income or a capital gain to absorb them.

Are new build properties exempt from the negative gearing changes?

Yes. Eligible new residential dwellings — including off-the-plan apartments, knock-down rebuilds, properties on previously vacant land, and newly built properties sold within 12 months of first occupation — retain full negative gearing under the current rules. New build investors can also choose between the 50% CGT discount or the new CPI indexation method when they eventually sell.

Does quarantining apply to properties held in a super fund?

No. The changes are specifically targeted at individual investors. Widely held trusts and superannuation funds are exempt from the quarantining rules, meaning super funds with residential investment properties can continue to operate under existing rules. This is one reason some commentators expect increased SMSF investment in residential property post-July 2027.

How much does quarantining actually cost investors?

The tax benefit doesn't disappear — it's deferred. Research suggests the present value of deferred tax benefits received at sale (versus receiving them annually) is roughly 25–30% less, due to the time value of money. On a typical negatively geared investment property with a 10-year hold, this translates to approximately $5,000–$10,000 in lost present value depending on the size of the rental loss and the investor's marginal rate.

Will the negative gearing changes affect house prices?

This is actively debated. The original negative gearing restrictions proposed by Labor in 2019 were predicted by some to reduce demand for established properties and increase demand for new builds — shifting investor preferences. The extent of the price impact depends on how many investors actually sell or redirect demand to new builds, and how the rental market responds. The available evidence from 2019 suggests demand-side impacts were overstated in predictions made at the time.

This article is for general information only and does not constitute financial, tax or legal advice. Individual circumstances vary. Consult a registered tax agent or licensed financial adviser before making decisions based on this information.