Negative Gearing Reform 2026: What FIRE Investors with Rental Property Need to Know

The 12 May 2026 federal Budget reforms negative gearing on residential investment property. From 1 July 2027, established homes purchased after Budget night (7:30pm AEST on 12 May 2026) can no longer offset rental losses against wage income. Existing properties held before Budget night are grandfathered. New builds keep full deductibility forever. Losses on the affected established properties carry forward against future rental income only.

For most Australian FIRE planners with no rental property, nothing changes. For the cohort that uses negatively geared residential property as part of an accumulation strategy (roughly 230,000 individuals acquire a new geared property each year per the Treasury factsheet), the math shifts in three places: future cashflow during accumulation, the property choice between established and new-build, and the tax-treatment of losses on disposal. This post walks each.

Who is affected and who isn't

The reform creates three categories of residential investment property. Each gets different treatment under the new rules.

The grandfathering is generous. Every property already in your portfolio today keeps its current tax treatment for the rest of its life. The reform applies only to new acquisitions of established property from 1 July 2027. Investors who bought between Budget night and 30 June 2027 get a short transition window to use the existing rules, then their losses are ring-fenced from FY27-28 onwards.

Important: “ring-fenced” does not mean losses are forfeited. They roll forward and can offset positive rental income from any property (grandfathered, ring-fenced, or new build) in future years. The losses persist until they are consumed. If you never run a positive-rental year, the carry forward accumulates. The Treasury factsheet is silent on what happens to unused carry forward if the entire portfolio is disposed without consuming it; the conservative read is that it expires unused.

Cashflow during accumulation

Negative gearing is a cashflow-shifting mechanic. The investor runs a property at a paper loss (interest + rates + insurance + property management exceeds rental income) and uses that loss to reduce their wage-income tax bill. At a 47% marginal rate, every $10,000 of property loss becomes $4,700 of tax refund, which partially offsets the cash outflow on the property.

From FY27-28, established-property investors who buy after Budget night lose that offset against wages. Their property loss still exists, but it can only be used against future positive rental income. For an investor who only owns one loss-making property, the loss accumulates and is essentially deferred until either (a) the property eventually rents positive (rare for highly geared property in the early years), or (b) they buy another property that runs positive (rare in early years too), or (c) they hold long enough for rents to grow past expenses.

Concretely, for a single property running $20,000/year of cash-loss with a $14,000 paper loss (after depreciation and capital works deductions), the difference is:

For a five-year accumulation hold with the property running the same loss each year, the cumulative cash cost rises from ~$67,000 (old) to $100,000 (new). The $33,000 of foregone tax refunds becomes a $70,000 paper carry-forward (5 × $14,000) that can only be used against future positive rental income or written off on disposal.

The new-build carve-out

Investors who buy a new build keep negative gearing against wages. They also retain the option of either the 50% CGT discount or the new indexation regime at sale, picking whichever produces lower CGT. From a tax-treatment perspective, a new-build investor in 2030 is in the same position as an established-property investor was in 2025.

“New build” means a dwelling constructed on vacant land, or a knock-down rebuild that results in more dwellings than were there before. A new build cannot have been previously sold unless first owned by the builder and not occupied for more than 12 months. Substantial renovation that doesn't increase supply does not qualify.

The investor implication: from 1 July 2027, the choice between an established property and a new build is not just a location / build-quality decision. The tax treatment differs materially. Two identical-rent properties at the same price, one established and one new build, produce different after-tax outcomes for the same investor:

• Established (post-1-July-2027 purchase):loss ring-fenced. Cashflow drag during the loss years is uncompensated. CGT on disposal uses the new indexation + floor regime.
• New build: loss offsets wages. Cashflow drag partially compensated by tax refund. CGT on disposal is whichever of old / new is lower.

For a leveraged investor at top marginal rate, the new-build carve-out is worth several thousand dollars per year of loss-making cashflow, plus the optionality on CGT treatment. The Government's explicit aim is to redirect new investor demand into properties that actually add housing supply; the carve-out is the lever that does it.

FIRE-specific implications

Generic property-investor commentary on the negative-gearing reform has covered the cashflow shock and the new-build arbitrage. Three angles matter specifically for FIRE planners and don't show up in that commentary.

Bridge-phase rental as a positive-income year

Early-retired FIRE planners with rental property often deliberately structure for positive rental income during the bridge years (between retirement and super preservation age). The standard playbook: pay down the loan in the working years, hold low-LVR property into retirement, draw the positive rental as part of bridge income.

Under the new regime, that strategy is unchanged. Positive rental income on any property is taxable as before. The ring-fencing only restricts how losses can offset other income; it doesn't touch positive-income years. Bridge-phase income from a low-LVR investment property keeps working.

Better yet: any ring-fenced carry-forward balance accumulated during the accumulation phase becomes usable against bridge-phase positive rental income. A FIRE planner who buys an established property in 2028 (loss-making, ring-fenced) and rolls into bridge-phase positive rental in 2042 can consume the accumulated carry-forward against those positive years.

Accumulation strategy reshape

The classic FIRE accumulation playbook of “leveraged established residential property running at a loss, refunded at marginal rate, sold at the 50% discount” loses two of its three legs from 1 July 2027 if you're buying post-cutoff. The wage offset is gone (loss ring-fenced) and the 50% discount is replaced (indexation plus floor). What's left is the leverage benefit on capital growth, which is still real but is no longer tax-amplified.

Three plausible reshapes:

• Buy new builds instead of established. The tax treatment that the old regime gave to all property now applies to new builds only. Investor demand will likely shift this way, which is the policy intent.
• Buy established at lower leverage. Without the wage-offset refund, high-leverage property runs at a larger net cash cost. Lower-LVR purchases run at a smaller cash cost or break even, which the new regime treats the same as today.
• Shift wealth-building to non-property assets.ETFs and shares are unaffected by the reform. Some FIRE planners using property purely for the tax mechanics will reallocate.

Carry-forward on disposal: the unresolved question

The Treasury factsheet says ring-fenced losses “carry forward against future residential property income years only.” It does not address what happens to an unused balance when the investor disposes of the entire property portfolio. Two interpretations exist in early commentary:

• The conservative read. Unused carry-forward expires on disposal of all relevant property. The investor loses the deferred tax benefit entirely. This treatment aligns with the explicit factsheet language and is the default the ProjectFi engine models.
• The optimistic read. Unused carry-forward attaches to the cost base on disposal, reducing the capital gain. The first Codex review of our engine implementation flagged that this attachment had no source in the Budget paper, so we removed it from the model.

Until the Treasury Laws Amendment Act is published, the conservative read is the right modelling default. Investors planning around the optimistic read should treat the treatment as speculative.

If you bought before 12 May 2026

Nothing changes for properties already in your portfolio. Full wage offset continues. CGT on disposal uses the transitional split: pre-2027 gain slice keeps the 50% discount, post-2027 slice gets the new indexation regime. For a long-held property the pre-2027 portion typically dominates the gain, so the practical CGT impact is modest.

Investors using grandfathered established property as a wage-offset vehicle can keep doing so indefinitely. There is no incentive to sell purely because of the reform; the transitional split protects most of the accrued gain on sale, and the wage offset is preserved for the life of the property.

What the engine models

When the dashboard's Budget 2026 toggle is on, the engine treats each investment property according to its property-type and purchase-date attributes:

• Per-taxpayer ring-fenced loss ledger, weighted by ownership fraction. Joint-property losses split correctly between primary and partner.
• Carry-forward of restricted losses against future positive rental income in the same taxpayer's pool.
• New-build CGT election: on sale, the engine runs both regimes and picks whichever produces lower CGT.
• Pre-2027 / post-2027 CGT apportionment using the time-pro-rata approximation when no formal valuation exists.
• Default property-type at insert is “established” (the tax-pessimistic option). New-build investors should flip the toggle on the property-edit screen.

Methodology page details: /methodology. The toggle is labelled “not yet legislated” everywhere it appears.

What the engine does not model

Stamp duty on property acquisition or disposal. Land tax state-by-state variation. The investor's personal financing constraints (servicing the higher cash outflow without a wage-offset refund may require a separate buffer in the portfolio). The reform does not apply to commercial property; the engine does not model commercial property at all. Discretionary trust treatment (the Budget's 30% minimum trust tax is out of scope for the engine).

Sources

• Treasury, Negative Gearing and Capital Gains Tax Reform factsheet (PDF). Primary source for the 12 May 2026 cutoff, the 1 July 2027 commencement, the ring-fencing mechanic, the carry-forward rules, and the new-build carve-out.
• Australian Government, Tax reform — Budget 2026-27. The Budget paper section covering the announcement.
• ATO, Rental properties. Reference for the current rental-loss offset rules and deductibility framework.
• ProjectFi, Selling Investment Property Before 1 July 2027. Companion article on the CGT timing decision.
• ProjectFi, Worked CGT Examples Using the Budget 2026 Calculator. Companion article walking five scenarios through the live calculator.
• ProjectFi, How the 2026 Federal Budget Changes the FIRE Math. The broader article covering the rest of the Budget changes.