The New Negative Gearing Rules Don't Kill Your Tax Benefit. Here's What They Actually Do.
Disclaimer: This blog article applies proposed new NG and CGT rules to a hypothetical property purchase for illustrative purposes only. A property purchased before 7:30pm AEST 12 May 2026 is grandfathered under existing rules. The Treasury Laws Amendment (Tax Reform No. 1) Bill 2026 (Cth) has not been passed – the Senate Economics Legislation Committee report was due 19 June 2026. Nothing in this article constitutes financial, legal, or tax advice. Always seek advice from a registered tax agent before making investment decisions. As a buyer's agent, Premier Buyers earns fees on transactions – this analysis is presented for education, not advocacy.
If you've bought an investment property since Budget night on 12 May 2026 – or you're considering buying one – you've almost certainly heard that your negative gearing tax benefit is gone.
It isn't. What has changed is when you get it and how the mechanism works. Those differences matter. Understanding them could save you from making a bad decision based on bad information.
What the legislation actually says
The Treasury Laws Amendment (Tax Reform No. 1) Bill 2026, introduced into Parliament on 28 May 2026, makes one core change to negative gearing: from 1 July 2027, rental losses on established residential properties purchased after Budget night can no longer be claimed against wages or other non-property income each year.
Instead, the Treasurer's second reading speech is explicit: losses will be "deductible against other income from residential properties, including capital gains. Excess losses can be carried forward to offset residential property income in future years."
PwC's analysis of the bill adds one important technical clarification: quarantined losses cannot be added to the CGT cost base. That means the deferred losses are not CPI-indexed – they sit as a flat dollar credit, applied against the capital gain after the indexed cost base calculation is done.
The tax benefit is not gone. It is deferred. Every dollar of loss that can't be claimed annually is stored as a credit – with two authorised ways to recover it later.
How deferred losses work: the two recovery paths
The mechanism has three distinct phases during a typical hold period:
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While the property is negatively geared, losses are quarantined and stack up as a credit. No annual refund arrives – but nothing is written off either. The credit grows every year.
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Once the property turns cash-flow positive, the accumulated losses absorb the positive rental income. Positive income becomes taxable only after the credit is fully exhausted. Zero income tax until then.
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Whatever losses remain in the credit at the time of sale are applied against the capital gain before CGT is calculated. A flat dollar reduction to the taxable gain – confirmed in the bill.
This is the mechanism that most commentary gets wrong. The annual refund disappears, but the tax saving doesn't – it arrives in two parts over time rather than annually.
Running the numbers: $500,000 property, 15-year hold
To make this tangible, I modelled a property purchased in 2011 for $500,000 and sold 15 years later. The assumptions are: 5.5% annual capital growth, 4% rental growth, $450/week starting rent, a standard loan structure with an initial interest-only period for 5 years transitioning to principal-and-interest repayments, marginal tax rate of 47%, ATO CPI – March 2011 (acquisition) of 98.3, and ATO CPI – March 2026 (est.) of 146.3.
Annual cashflow comparison
The chart below compares what the investor actually received (or paid) each year after tax, under each set of rules. The key difference: under the old rules, the annual NG refund reduced the out-of-pocket cost during the loss years. Under the new rules, no refund arrives until the property sells – the investor funds the full shortfall.
During the nine negatively geared years (2011–2019), the S2 investor funds on average $2,576 per year more out of pocket than under the old rules – because the annual NG refund is no longer there to soften the blow. In Year 1 alone, that's $4,202 more.
But from 2020 onwards, the picture flips. Under the old rules, the investor was paying income tax on positive rental income. Under the new rules, the accumulated losses absorb that income entirely – zero income tax on rental profits for six years.
How deferred losses accumulate and recover
The chart below traces the lifecycle of the deferred loss credit across the 15-year hold. It rises steadily through the loss years, peaks at $49,334 at the end of 2019, then declines as the positive rental income absorbs it. At the point of sale, $20,567 of credit remains – and that amount is applied directly against the capital gain.
The profit comparison
Here is what the 15-year investment produces under each set of rules, from the same $130,000 initial outlay:
The difference: $9,318 over 15 years – or $621 per year. On a $130,000 initial outlay that generates over $500,000 in net profit, this is not a viability question. The mechanism works – it just costs more in annual cashflow during the hold.
Breaking down where the $9,318 comes from
Two effects pull in opposite directions. The NG quarantining means the S2 investor has funded more out of pocket during the hold ($9,666 more across 15 years) – but the new CGT rules happen to produce slightly less tax at sale ($348 less, because at 2.69% actual CPI the CPI-indexed cost base doesn't quite match the 50% discount). The net is $9,318 in favour of the old rules.
| Line item | S1 – Old rules | S2 – New rules | Difference |
|---|---|---|---|
| Equity at sale | $782,924 | $782,924 | $0 |
| Less: Initial outlay | ($130,000) | ($130,000) | $0 |
| Less: Net operational cash outflow | ($10,901) | ($20,567) | ($9,666) – New rules worse |
| Less: CGT payable at sale | ($131,208) | ($130,860) | +$348 – New rules better |
| Net total profit | $510,815 | $501,497 | ($9,318) – New rules lower |
The CPI variable: where the new CGT rules could outperform
Whether the new CGT framework produces more or less tax than the old 50% discount depends entirely on what CPI averages over the holding period. The break-even is 2.87% per annum.
At actual ATO/ABS CPI for 2011–2026 (estimated 2.69% p.a.): old rules produce slightly more profit by $9,318
At 2.87% p.a.: the two approaches are equivalent
At 3% p.a. or above: new CPI indexation produces less CGT than the 50% discount
At 4% p.a.: new rules are better by $68,000 over a 15-year hold
For someone buying today and holding for 15-plus years, with current CPI still running above the RBA's 2–3% target band, this is genuinely uncertain. The new rules could ultimately produce a better outcome than the 50% discount did.
What actually changes for investors
The long-run wealth outcome is broadly similar. What genuinely changes is the pattern of cashflows:
During the loss years (the hard years): Under the old rules, the annual tax refund cut your out-of-pocket cost roughly in half. Under the new rules, that refund doesn't arrive until the property sells. You fund the full pre-tax shortfall yourself. On this property, that's up to $4,202 more in Year 1, tapering off each year as rent grows and the shortfall narrows.
During the positive years (the easier years): Under the old rules, you'd be paying income tax on your rental profits. Under the new rules, the accumulated losses absorb those profits entirely – zero income tax until the credit runs dry. That's six years of tax-free rental income in this model.
At sale: The remaining $20,567 of deferred losses further reduce the capital gain before CGT is applied.
The question is not whether property works under the new rules. The question is whether your cashflow position can fund the early years without the annual NG refund to help. For investors with strong income or access to offsets, the answer is often yes. For investors stretched on cashflow, the timing challenge is real.
Important caveats
Bill not yet passed. The Senate Economics Legislation Committee report was due 19 June 2026. The legislation has not been enacted. These scenarios are illustrative based on the bill as introduced.
Grandfathered properties are unaffected. Any property contracted before 7:30pm AEST on 12 May 2026 retains existing NG rules indefinitely, regardless of when it is sold.
New residential dwellings remain excluded. New builds will be able to continue negative gearing under existing rules – but the definition of "new residential dwelling" has not been set. The Minister will determine this by legislative instrument. Until that's published, there's genuine uncertainty about what qualifies.
CPI at sale is an estimate. The ATO CPI table currently runs to September 2025 (143.6). The March 2026 figure (~146.4) is estimated. Once the legislation passes and the ATO updates the table, the indexation factor will be confirmed.
Sale before 1 July 2027. This model assumes a sale before the new CGT rules technically commence. For a sale after that date, a split-gain calculation applies (old rules for pre-July 2027 growth, new rules for post-July 2027 growth).
Marginal rate. This model uses 47%.