On the evening of 12 May 2026, Treasurer Jim Chalmers handed down a Federal Budget that will reshape property investment in Australia for years to come. Two headline changes — the quarantining of negative gearing on established properties and the replacement of the 50% CGT discount with cost base indexation — represent the most significant shift in property tax policy since the introduction of the CGT discount in 1999. This guide breaks down exactly what is changing, when it takes effect, who is affected, and what it means for different types of investors.
In this article
- The Timeline: Key Dates You Need to Know
- Negative Gearing: What Is Actually Changing
- The Grandfathering Rules: Who Is Protected
- New Builds: The Clear Winner
- CGT Overhaul: Indexation Replaces the 50% Discount
- Other Budget Housing Measures
- What This Means for Different Investor Types
- Practical Recommendations
- Key Takeaway
The Timeline: Key Dates You Need to Know
Before diving into the detail, here is the critical timeline. These dates determine which rules apply to which properties and when.
Budget Reform Timeline
Important caveat: These are budget announcements, not yet legislated. The measures must pass Parliament to become law. While the Government holds a majority in the House of Representatives, the Senate crossbench could seek amendments. The core measures are expected to pass, but details may shift during the legislative process. We will update this article as the legislation progresses.
Negative Gearing: What Is Actually Changing
Let's be precise, because there has been significant confusion in the media coverage. Negative gearing is not being abolished. What is changing is how rental losses on certain properties can be used.
The current rules (unchanged for grandfathered properties)
Under the current system, if your investment property generates a net rental loss — that is, deductible expenses (interest, rates, insurance, depreciation, repairs) exceed rental income — that loss can be offset against your entire taxable income. This includes salary and wages, business income, and any other income. The effect is to reduce your total tax bill. For someone on a 37% marginal rate, a $15,000 rental loss saves $5,550 in tax.
The new rules (from 1 July 2027, for post-Budget-night established property purchases)
For established residential investment properties purchased after 7:30pm on 12 May 2026, the rental loss will be quarantined from 1 July 2027. This means:
- Rental losses can only be offset against other residential investment property income — including rental income from other properties and capital gains from the sale of residential investment properties.
- Rental losses can no longer be offset against salary, wages, business income, dividend income, or any other non-residential-property income.
- Excess quarantined losses that cannot be used in a given year can be carried forward to future years and used against future residential property income or capital gains.
In practical terms, this means an investor who buys an established apartment in 2028 and generates a $15,000 rental loss can no longer use that loss to reduce the tax on their $150,000 salary. The loss sits in a quarantine pool and can only be applied when the investor earns residential property income or realises a capital gain on a residential investment property.
What "quarantine" means in practice: Think of it as a separate tax bucket. Your rental losses from post-Budget-night established properties go into this bucket. They can only come out when you have residential property income or residential property capital gains to offset them against. If you hold a loss-making established property for ten years and then sell at a gain, the accumulated quarantined losses can be applied against that capital gain — so the tax benefit is deferred, not necessarily lost entirely. But you no longer get the annual cash-flow benefit of a tax refund against your salary.
The cash flow impact
This is where the change bites hardest. Under current rules, negative gearing provides an annual tax refund that partially offsets the out-of-pocket cost of holding a loss-making property. With quarantining, that annual offset disappears for newly purchased established properties.
Consider a practical example. An investor on a $150,000 salary buys an established property in 2028 with a $12,000 annual rental loss:
| Scenario | After-Tax Holding Cost |
|---|---|
| Current rules (loss offsets salary at 37%) | $7,560/yr ($12K minus $4,440 tax saving) |
| New rules (loss quarantined) | $12,000/yr (full loss, no annual tax offset) |
| Increase in annual holding cost | $4,440/yr |
That is an extra $4,440 per year — or $370 per month — coming out of the investor's pocket. Over a 10-year hold, that is $44,400 in additional cash outlays (before considering the time value of money). The quarantined losses do accumulate and can be used later, but the investor no longer gets the annual cash-flow relief.
For high-income investors on the top marginal rate (45%), the annual impact is even larger: $5,400 per year on the same $12,000 loss.
The Grandfathering Rules: Who Is Protected
The grandfathering provisions are straightforward and generous. If you held a residential investment property — or had exchanged contracts on a property (even if settlement had not yet occurred) — as at 7:30pm AEST on 12 May 2026, the current negative gearing rules continue to apply to that property indefinitely.
This means:
- Your rental losses on grandfathered properties can continue to be offset against salary, wages, and all other income, exactly as they are today.
- There is no sunset date. The grandfathering applies for as long as you hold the property.
- If you sell the grandfathered property, the new owner does not inherit the grandfathering. The property becomes subject to the new rules for the purchaser (assuming they buy after Budget night).
If you already own investment properties: Nothing changes for you. Your current tax arrangements continue. There is no reason to panic-sell or restructure existing holdings in response to this budget. The grandfathering is comprehensive and permanent (for as long as you hold).
What counts as "under contract"?
The Budget papers specify that properties where contracts have been exchanged (even if settlement has not occurred) as at 7:30pm on Budget night are treated as held. This covers the common scenario where an investor signed a contract in April or early May 2026 but settlement is scheduled for June or July. These investors are grandfathered.
However, investors who were merely in negotiations, had made verbal offers, or were at the due diligence stage without exchanged contracts are not grandfathered. The cut-off is the legal exchange of contracts, not expressions of interest.
New Builds: The Clear Winner
The budget deliberately creates a two-tier system that advantages new residential construction over established housing. Eligible new builds are fully exempt from the negative gearing quarantine. This means:
- Investors who purchase a newly constructed dwelling can continue to negatively gear against all income — salary, wages, business income — exactly as the current system works.
- This exemption applies both before and after 1 July 2027.
- The policy intent is explicit: channel investor demand toward new supply rather than competition for existing housing stock.
What qualifies as a "new build"?
The Treasury fact sheet defines eligible new builds as substantially new residential premises that have not previously been sold as residential premises. This includes:
- Off-the-plan apartments and townhouses purchased from the developer
- House and land packages where the dwelling is newly constructed
- Properties built by the investor on vacant land (owner-builder or contracted construction)
The precise eligibility criteria will be defined in the legislation, and there are expected to be provisions around the timing of construction commencement and completion. The GST definition of "new residential premises" (broadly, a dwelling that has not been previously sold as residential premises or has been created through substantial renovation) is likely to inform the legislative definition.
Other exemptions
The negative gearing quarantine also does not apply to:
- Properties held in widely held trusts (e.g., listed property trusts, managed investment schemes)
- Properties held in superannuation funds (including self-managed super funds)
- Build-to-rent developments that meet affordability standards
- Government housing programs (e.g., National Rental Affordability Scheme, state housing schemes)
A word of caution on new builds: The tax advantage of new builds will likely increase demand for new construction from investors. This could lead to localised oversupply in corridors where developers are already building at capacity — particularly in high-density apartment precincts in Sydney, Melbourne, and Brisbane. The tax benefit is real, but it does not override the fundamentals of supply and demand in a specific location. A new apartment in an oversupplied corridor with poor transport links is still a poor investment, tax advantage or not.
CGT Overhaul: Indexation Replaces the 50% Discount
The second major reform is the overhaul of the capital gains tax discount. This change affects all capital assets (not just property), but property investors are among the most directly impacted.
Current system (applies to assets bought and sold before 1 July 2027)
Individuals, trusts, and partnerships that hold a capital asset for more than 12 months receive a 50% discount on the capital gain. So if you buy a property for $600,000 and sell it for $900,000, your capital gain is $300,000, and the taxable capital gain is $150,000 (50% discount). You pay tax on the $150,000 at your marginal rate.
New system (assets bought from 1 July 2027)
The 50% discount is replaced with cost base indexation. Instead of discounting the gain, your cost base is adjusted upward for inflation using the Consumer Price Index (CPI). You then pay tax only on the real gain — the amount by which the sale price exceeds your inflation-adjusted cost base.
Additionally, a minimum 30% tax rate on net capital gains will apply. This means that even if your marginal tax rate is lower than 30%, your capital gains will be taxed at no less than 30%.
When is indexation better? When is it worse?
The answer depends on how long you hold the asset and the rate of inflation versus the rate of capital growth. Let's work through two scenarios with a $700,000 property.
Scenario A: 10-year hold, moderate growth (5% p.a.), 3% inflation
Purchase price: $700,000
Sale price after 10 years (5% growth): $1,140,367
Nominal capital gain: $440,367
Under the current 50% discount:
Taxable gain = $440,367 x 50% = $220,184
Tax at 37% marginal rate = $81,468
Under CPI indexation (3% inflation):
Indexed cost base = $700,000 x (1.03^10) = $940,639
Real gain = $1,140,367 − $940,639 = $199,728
Tax at 37% marginal rate = $73,899
Scenario B: 5-year hold, strong growth (8% p.a.), 3% inflation
Purchase price: $700,000
Sale price after 5 years (8% growth): $1,028,567
Nominal capital gain: $328,567
Under the current 50% discount:
Taxable gain = $328,567 x 50% = $164,284
Tax at 37% marginal rate = $60,785
Under CPI indexation (3% inflation):
Indexed cost base = $700,000 x (1.03^5) = $811,274
Real gain = $1,028,567 − $811,274 = $217,293
Tax at 37% marginal rate = $80,398
The pattern is clear: indexation favours long holds and lower-growth assets, while the 50% discount favours shorter holds and high-growth assets. When property growth significantly outpaces inflation, the flat 50% discount is more generous because it halves the entire gain regardless of the inflation component. When growth is more modest or the hold period is very long, indexation can produce a better outcome because a larger proportion of the gain is attributable to inflation rather than real appreciation.
The key insight: For property investors in strong-growth suburbs where capital appreciation consistently exceeds inflation by a wide margin, the shift from the 50% discount to indexation will generally result in a higher tax bill on sale. For investors in moderate-growth areas or those holding for very long periods (15+ years), the difference narrows or can even favour the new system.
Transitional rules for assets bought before 1 July 2027
If you own an asset purchased before 1 July 2027 and sell it after that date, the capital gain is split into two components:
- Pre-1 July 2027 gain: The portion of the gain accrued up to 30 June 2027 (calculated on a time-apportioned basis). The existing 50% discount applies to this portion.
- Post-1 July 2027 gain: The portion of the gain accrued from 1 July 2027 onward. The new CPI indexation model applies to this portion.
This transitional approach means existing investors are not retrospectively disadvantaged. The longer you have held the asset before 1 July 2027, the larger the proportion of the gain that benefits from the 50% discount. An investor who bought in 2015 and sells in 2035 would have roughly 12 out of 20 years of gains under the more favourable old rules.
The minimum 30% tax rate on capital gains
This provision primarily affects lower-income individuals and those using trusts to distribute capital gains to beneficiaries on lower marginal rates. Under the current system, a trust can distribute a discounted capital gain to a beneficiary on the 16% tax bracket, resulting in an effective tax rate of just 8% on the original gain (50% discount, then 16% marginal rate). Under the new rules, the minimum 30% rate on the net gain prevents this kind of tax minimisation.
For most individual investors on marginal rates of 30% or above, the minimum rate is not an additional impost — they were already paying at or above 30%.
Other Budget Housing Measures
While the negative gearing and CGT changes dominate the headlines, several other budget measures affect the property market.
Foreign buyer ban extended to 30 June 2029
The ban on foreign buyers purchasing existing residential dwellings, first introduced as a temporary measure, has been extended to 30 June 2029. Foreign nationals and temporary residents remain restricted to purchasing new dwellings only (subject to FIRB approval). This removes one source of demand from the established property market, though the practical impact has been modest given existing FIRB restrictions were already in place.
$5.5 billion Help to Buy scheme
The shared equity scheme allows eligible first-home buyers to purchase a home with a Government equity contribution of up to 40% for new homes or 30% for existing homes, reducing the required deposit and mortgage size. Income caps and property price caps apply. While this does not directly affect investors, it increases demand from first-home buyers, particularly at the lower end of the market.
Build-to-rent provisions
Institutional build-to-rent developments are exempted from the negative gearing quarantine and will be subject to strengthened affordability standards. The Government is signalling a preference for large-scale, purpose-built rental developments over individual investor participation in the established market.
$9.3 billion National Agreement on Social Housing (NASHH)
The largest social housing commitment in decades, NASHH provides funding for new social and affordable housing stock. While this operates in a different market segment from private investment, increased social housing supply could marginally reduce rental demand pressure in lower-priced suburbs.
What This Means for Different Investor Types
The budget changes do not affect all investors equally. Your position depends on what you already own, what you are planning to buy, your income level, and your investment strategy.
Existing portfolio holders
Impact: Minimal (grandfathered)
If you already own investment properties as at Budget night, nothing changes for your existing holdings. Current negative gearing rules apply indefinitely. Your CGT treatment on sale depends on when you sell — if before 1 July 2027, the full 50% discount applies; if after, the transitional split rules apply, which still preserve the 50% discount for gains accrued up to 30 June 2027.
Action required: None on existing holdings. Consider holding longer to maximise the proportion of gains under the old 50% discount before the transitional split dilutes it.
No immediate action neededProspective established property buyers
Impact: Significant (yield and cash flow matter more)
If you are looking to buy an established investment property after Budget night, the economics have shifted. You can no longer rely on negative gearing tax refunds to subsidise holding costs against your salary. The property needs to either generate sufficient rental income to cover most of its costs, or you need to be comfortable funding the full shortfall from personal cash flow without an annual tax offset.
Action required: Reassess your target yield. Properties with gross yields below 4% become significantly more expensive to hold under the new rules. Consider whether a new build might offer better overall returns once the tax advantage is factored in.
Strategy reassessment neededHigh-income negative gearers
Impact: Most affected (largest tax benefit removed)
Investors on the 45% marginal rate have historically received the largest tax benefit from negative gearing — 45 cents back for every dollar of rental loss. Under quarantining, this annual benefit disappears for new established property purchases. A $20,000 annual rental loss that previously generated a $9,000 tax refund now sits in a quarantine pool, unused until the property generates income or is sold.
Action required: The strategy of buying deliberately loss-making properties for the tax break no longer works for new established property purchases. Shift focus to either new builds (which retain full negative gearing), positively geared or cash-flow-neutral properties, or accept the higher holding cost if the suburb's growth fundamentals justify it.
Significant strategy shift requiredOwner-occupiers
Impact: Minimal to nil
Owner-occupiers are not affected by the negative gearing changes (they do not claim rental deductions on their own home). The CGT changes are also irrelevant for the family home, which remains exempt from CGT. The main indirect effect may be on property prices: CBA analysis suggests prices could be approximately 3% lower than they otherwise would have been, with the impact concentrated in investor-heavy segments (apartments, townhouses, lower-priced dwellings). Detached housing in owner-occupier-dominated suburbs is less affected.
Largely unaffectedPractical Recommendations
Here is a set of practical steps for investors navigating the post-budget landscape.
1. Do not panic-sell existing holdings
This is the most important point. If you own investment properties purchased before Budget night, you are fully grandfathered. The current tax treatment continues. Selling in a reactive panic would crystallise a CGT event and potentially see you exit strong-performing assets for no reason. The market disruption from the budget announcements is a short-term sentiment event, not a change in the fundamentals of your existing holdings.
2. Reassess cash flow on new purchases
For any new established property purchase made after Budget night, run the numbers without the annual negative gearing tax offset. Can you afford the full out-of-pocket cost of the rental shortfall? If a property generates a $15,000 annual loss and you were counting on a $5,500 tax refund to make the numbers work, you now need to fund the full $15,000 from personal cash flow (for established properties). If that stretches your budget to breaking point, the property is not affordable under the new rules.
3. New builds become more attractive — but watch for oversupply
The tax advantage of new builds is real and significant. But be cautious about where you buy. Developer marketing will aggressively push the "negative gearing exempt" angle, and there is a risk of oversupply in certain corridors as investors flood into new construction. The tax advantage does not protect you from buying in an oversupplied precinct where capital growth is flat and vacancies are high. Apply the same suburb-level due diligence you would for any property:
- What is the demand-supply ratio (DSR) for the suburb?
- What is the vacancy rate?
- What are the population growth projections?
- Is there significant planned supply in the pipeline (development applications, zoned land)?
- What are the transport, employment, and infrastructure drivers?
4. Suburb fundamentals matter more than ever
With the negative gearing tax subsidy removed for new established purchases, the property itself needs to do more of the work. A property in a strong-growth suburb with high demand, low vacancy, and genuine economic drivers will still build wealth — the after-tax holding cost is just slightly higher. A property in a weak suburb with flat growth was always a poor investment; without the annual tax offset, it becomes an obviously poor investment.
The metrics that matter have not changed: DSR, vacancy rate, population growth, income growth, infrastructure investment, and economic diversity. What has changed is the penalty for ignoring them. Previously, negative gearing partially masked the cost of being in the wrong suburb. Now, the full cost is exposed.
5. Consider the CGT implications before selling
If you are holding assets purchased before 1 July 2027, the transitional rules mean that selling sooner preserves a larger proportion of your gain under the old 50% discount. However, this needs to be weighed against the benefits of continued holding (ongoing rental income, further capital growth, and the compounding effect of time). Selling solely to "lock in" the old CGT discount is almost never optimal — the transaction costs (agent fees, legal fees, stamp duty on your next purchase) typically exceed the tax saving.
6. Review trust structures
The minimum 30% tax rate on capital gains specifically targets trust distributions to low-income beneficiaries. If your investment structure relies on distributing capital gains to family members on low or zero marginal rates, the tax benefit of this strategy has been significantly curtailed. Consult your tax adviser about whether your trust structure remains optimal under the new rules.
7. Get professional tax advice for your specific situation
The interaction between negative gearing quarantine, CGT indexation, transitional rules, trust distributions, and SMSF holdings is complex. The general principles in this article apply broadly, but your specific circumstances — including your marginal rate, holding period, property type, ownership structure, and portfolio composition — will determine the precise impact. A qualified tax adviser who understands property investment should review your position.
Expected market impact
CBA's analysis, published in the days following the budget, estimates that house prices will be approximately 3% lower than they otherwise would have been as a result of the reforms. This is not a 3% price fall from current levels — it is 3% less growth than the counterfactual baseline. The distinction matters.
The impact is expected to be concentrated in segments where investor participation is highest:
- Apartments and townhouses: Higher investor share, more directly affected.
- Lower-priced established dwellings: These are the bread-and-butter of the negative gearing investor market.
- Inner-city and investor-heavy corridors: Suburbs with 40%+ investor ownership will feel it most.
By contrast, detached housing in owner-occupier-dominated suburbs is less affected. These markets are primarily driven by owner-occupier demand, which is untouched by the reforms. The impact on rents is expected to be smaller than the impact on prices, as the reforms do not reduce the total demand for rental accommodation — they shift the ownership structure of rental stock rather than the quantity.
Key Takeaway: Fundamentals Win
The era of buying a loss-making established property, banking on the tax deduction to reduce the pain, and hoping capital growth bails you out is ending for new purchases. This does not mean property investment is dead — far from it. It means the bar for what constitutes a sound investment has been raised.
Properties that are fundamentally strong — in high-demand, low-vacancy suburbs with genuine economic drivers, reasonable yield, and a track record of capital growth — remain excellent investments. The after-tax holding cost is marginally higher, but the wealth-building engine is the same: capital compounding in a well-chosen location over time.
Properties that only "worked" because of the tax deduction — loss-making assets in flat-growth suburbs, purchased for the annual tax refund rather than the fundamentals — were always borderline investments. The quarantining of negative gearing simply removes the anaesthetic that made them tolerable.
Summary: What to Remember
- Existing holdings are grandfathered. If you own investment properties as at 12 May 2026, nothing changes. Do not panic-sell.
- New established property purchases lose the annual tax offset. From 1 July 2027, rental losses on post-Budget-night established properties are quarantined — they can only offset residential property income, not salary.
- New builds retain full negative gearing. The Government is channelling investor demand toward new supply. This is a genuine tax advantage, but oversupply risks in specific corridors remain real.
- The 50% CGT discount is being replaced with cost base indexation. This favours long holds and lower-growth assets; high-growth, shorter-hold strategies face higher tax bills.
- Suburb fundamentals matter more than ever. Without the annual tax subsidy masking holding costs, the quality of the suburb and property must stand on its own merits. DSR, vacancy, growth trajectory, and economic drivers are the metrics that separate wealth-building assets from money pits.
- Get professional advice. The interaction between quarantining, indexation, transitional rules, and your personal circumstances is complex. Do not rely on general guidance for specific decisions.
Disclaimer
This article is general information only and does not constitute financial, tax, or legal advice. Property investment involves risk, and past performance is not indicative of future results. The budget measures described are proposals announced on 12 May 2026 and are subject to the passage of legislation. Consult a qualified financial adviser, tax professional, or legal practitioner before making investment decisions based on this information.
Suburb Fundamentals Matter More Than Ever
With the tax safety net narrowing, the quality of the suburb you invest in determines everything. Use data-driven analysis to find suburbs with strong growth fundamentals.