Don’t Let The Budget Push You Into A Worse Position

Why turning your home into an investment property is still a bad idea — with or without negative gearing

The Advice Doing the Rounds

Since the 2026–27 Federal Budget announced restrictions on negative gearing on 12 May 2026, one piece of “strategy” has been circulating with increasing frequency: move out of your current home, convert it to a rental, and buy a new principal place of residence. The logic goes: your old property is grandfathered under the negative gearing rules, so you keep the deduction, collect some rent, and everyone wins.

It sounds plausible. But when you model the full debt structure correctly, including the equity release loan that funds the new home purchase, and what that borrowing is actually being used for, the numbers tell a very different story.

Both scenarios in this article carry exactly the same total debt: $1,400,000. The only difference is which $1,100,000 is deductible and which $300,000 is not. And that difference alone produces a $147,000 financial gap over ten years.

What the Budget Actually Changed

From 1 July 2027, losses from established residential properties acquired after Budget night (12 May 2026) can no longer be offset against ordinary income. Instead, net rental losses are quarantined and carried forward, available only against future rental income or residential property capital gains.

Key points that are often misunderstood:

• Properties already owned before 7:30pm AEST on 12 May 2026 are fully grandfathered – negative gearing continues until the property is disposed of.
• New builds are exempt – investors in new residential construction are unaffected.
• Quarantined losses are not lost. They accumulate and can offset the capital gain at sale – often at the most valuable point in the investment lifecycle.
• The change to negative gearing does not alter the fundamental principle of debt efficiency: you should always seek to maximise deductible debt and minimise non-deductible debt.

The Scenario

Starting Position

– Current home value: $900,000

– Existing mortgage balance: $300,000

– Available equity: $600,000

– Marginal tax rate: 39% (including Medicare levy)

– Interest rate: 6.2% p.a. across all borrowings

– Market rent if converted to IP: $700/week ($36,400 per year)

– Annual property running costs (rates, insurance, maintenance, property management): $8,000

Two options on the table:

Scenario A – The Swap: Move out of the current home and convert it to an investment property. Release $600,000 of equity via a new loan secured against the old home (now IP), and use those funds as the deposit on a new $1,100,000 PPoR. Take on a $500,000 mortgage on the new home.

Scenario B – Keep & Buy New IP: Stay in the current home. Release $600,000 of equity via a new loan secured against the PPoR, and use those funds as the deposit on a new $1,100,000 investment property. Take on a $500,000 mortgage on the new IP.

Both scenarios result in exactly $1,400,000 of total debt. The entire difference comes down to which debt is deductible.

The Debt Structure: Where It All Goes Wrong

Deductibility is determined by the purpose for which money is borrowed – not by which property secures the loan, and not by which property the tenant lives in.

This is the principle that turns The Swap from a tax strategy into a tax problem.

In Scenario A, the $600,000 equity release is a new loan. But those funds are used to purchase a new principal place of residence. A loan drawn to acquire a private home is not deductible, regardless of which property it is secured against. The $500,000 mortgage on the new home is also non-deductible for the same reason. The only deductible debt in the entire structure is the original $300,000 mortgage on the old home, which becomes deductible on change of use to an income-producing property.

In Scenario B, the $600,000 equity release is drawn specifically to fund the purchase of an investment property. The purpose is investment, so the interest is deductible. The $500,000 mortgage on the new property is also deductible, for the same reason. The only non-deductible debt is the original $300,000 PPoR mortgage, the family home you are still living in.

 

	Scenario A — The Swap		Scenario B — Keep & Buy New IP
Loan	Amount	Status	Amount	Status
Existing $300k mortgage on old home	$300,000	✔ Deductible	$300,000	✘ Non-deductible
Equity release (new loan)	$600,000	✘ Non-deductible	$600,000	✔ Deductible
Purpose of equity release	Fund new PPoR	—	Fund new IP purchase	—
New property mortgage	$500,000	✘ Non-deductible	$500,000	✔ Deductible
New property is…	New PPoR	—	New IP	—
TOTAL DEBT	$1,400,000		$1,400,000
Total deductible debt	$300,000		$1,100,000
Total non-deductible debt	$1,100,000		$300,000

 

Note on the existing $300k mortgage in Scenario A: On change of use of a property from private to income-producing, the ATO’s general position is that interest on the outstanding loan balance at the time of conversion becomes deductible from that point forward, provided the property is genuinely used to produce assessable income. This is a nuanced area – the deductibility of this loan should be confirmed with your tax adviser before relying on it.

The Interest Gap: $19,344 Every Year

Both scenarios pay identical total interest: $86,800 per year on $1,400,000 at 6.2%. The difference is entirely in how much of that interest generates a tax deduction.

 

INTEREST BURDEN (@ 6.2% p.a.)	Scenario A — The Swap	Scenario B — Keep & Buy
Deductible interest ($300k vs $1,100k @ 6.2%)	$18,600	$68,200
Non-deductible interest ($1,100k vs $300k @ 6.2%)	$68,200	$18,600
Total annual interest	$86,800	$86,800
Tax relief on deductible interest (39% MTR)	($7,254)	($26,598)
AFTER-TAX INTEREST COST	$79,546	$60,202
Annual saving — Scenario B		$19,344 less per year

 

Scenario B generates $26,598 in annual tax relief on its deductible interest. Scenario A generates $7,254. The gap is $19,344 per year – not because of anything the Budget changed, but simply because of which debt is deductible. This gap exists entirely independently of negative gearing. However, note that we cannot have a net-rental loss on the property, so some of that deductibility is carried forward, keep reading to understand more.

Annual Cash Flow: The Full Picture

Now we layer in the rental income. Both scenarios involve the same property being rented at $700 per week — the key difference is how the deductible IP interest interacts with the rental result.

In Scenario A, the IP carries only $300,000 of deductible debt. At 6.2%, that is $18,600 of deductible interest against $28,400 of net rent — leaving a taxable rental profit of $9,800. That rental profit attracts $3,822 in tax. The remaining $68,200 of interest (on the equity release and new PPoR mortgage) is paid entirely from after-tax dollars with no relief.

In Scenario B, the IP carries $1,100,000 of deductible debt ($600,000 equity release + $500,000 IP mortgage). At 6.2%, that is $68,200 of deductible interest against $28,400 of net rent — producing a rental loss of $39,800. Because the IP is a new purchase (acquired post-Budget), this loss is quarantined under the new rules and carried forward. No immediate tax saving, but no tax bill on the rental income either, and a growing deduction bank building toward the eventual sale.

 

ANNUAL CASH FLOW (same rental property, $700/wk)	Scenario A — The Swap	Scenario B — Keep & Buy
Gross rent	$36,400	$36,400
Less: property expenses	($8,000)	($8,000)
Net rent before interest	$28,400	$28,400
Less: deductible IP interest	($18,600)	($68,200)
Net rental income / (loss)	$9,800 — TAXABLE	($39,800) — quarantined CF
Tax on net rental income (39%)	($3,822)	Nil
Less: non-deductible interest	($68,200)	($18,600)
NET ANNUAL CASH POSITION	($62,222)	($58,400)
Annual cash advantage — Scenario B		$3,822 better p.a.
Quarantined loss carried forward	Nil	$39,800 p.a.

 

Scenario A: The old home is grandfathered (owned before 12 May 2026), so rental losses, if any, would be immediately deductible. In this case the IP is positively geared ($9,800 net rental income) so negative gearing does not apply. The rental profit is fully taxable. Scenario B: The new IP is acquired post-Budget and is subject to the new quarantining rules. Losses are carried forward, not immediately deductible against ordinary income. If the new IP were also grandfathered (e.g. a pre-Budget purchase), the $39,800 loss would generate $15,522 in immediate tax savings, making Scenario B even more favourable.

Carried-Forward Losses: Building a Deduction Bank

The $39,800 annual quarantined loss in Scenario B is not wasted – it is deferred. Each year it accumulates:

– Year 1: $39,800 carried forward

– Year 5: ~$199,000 accumulated

– Year 10: ~$398,000 accumulated

When the investment property is eventually sold, this accumulated loss reduces the taxable capital gain dollar for dollar. At a 39% marginal rate, $398,000 of accumulated losses is worth approximately $155,220 in reduced CGT at the point of sale.

Scenario A has no quarantined losses to carry forward, because its IP is positively geared and the non-deductible interest does not create a rental loss for tax purposes. There is no deduction bank being built. There is just $68,200 of interest being paid every year with no tax relief, and a growing CGT liability on the converted property.

Capital Gains Tax: The Hidden Cost

The annual cash flow difference between the two scenarios is meaningful. The CGT difference at sale is substantial.

Your current home, right now, may be fully exempt from CGT under the main residence exemption (MRE). The moment you convert it to an investment property and acquire a new PPoR, that exemption begins to erode. Under s118-185 ITAA 1997, the exempt fraction is calculated as the proportion of total ownership days the property was your main residence. Every year it is rented reduces the exempt fraction.

In Scenario B, the existing home remains the main residence throughout. Its CGT exemption is preserved entirely. The new investment property is acquired at market value with a clean cost base, and any gain at sale is substantially offset by the accumulated carry-forward losses.

 

CGT AT SALE — 10-year hold, 6% p.a. growth	Scenario A: Old PPoR sold as IP	Scenario B: New IP sold (full MRE on old home)
Property being sold	Old home (now IP)	New IP ($600k purchase)
Original cost base	$900,000	$600,000
Sale price (10 yrs @ 6% p.a.)	$1,611,000	$1,074,000
Total nominal gain	$711,000	$474,000
CGT treatment on old home	Partial MRE — est. 50% taxable†	Full MRE — $0 CGT
Taxable gain (old home)	~$355,500	$0 (MRE preserved)
Less: accumulated CF losses	Nil	($398,000)
Net taxable gain on IP	—	$76,000
CGT payable (est. 39% MTR)	~$138,645	~$29,640
CGT SAVING — SCENARIO B		~$109,005 less CGT

 

† The partial MRE calculation under s118-185 ITAA 1997 assumes the property was held as a PPoR for an equal period before and after conversion (50% exempt, 50% taxable). In practice, a shorter pre-conversion ownership period produces a larger taxable fraction. The new CGT regime from 1 July 2027 replaces the 50% discount with cost base indexation and a 30% minimum tax on real gains for individuals; the CGT estimate above uses the 39% MTR as a conservative approximation. Seek specific advice on the CGT treatment applicable to your situation. The Scenario B new IP is assumed to be acquired post-1 July 2027 and subject to the new indexation regime; the 39% MTR on $76,000 net gain is used for consistency.

10-Year Financial Outcome: Putting It All Together

Every individual component of this analysis points in the same direction. The table below consolidates the 10-year financial picture:

 

10-YEAR FINANCIAL OUTCOME SUMMARY	Scenario A — The Swap	Scenario B — Keep & Buy
Annual after-tax interest saving	—	$19,344 p.a.
Annual cash flow advantage (net)	—	$3,822 p.a.
Cumulative cash flow advantage (10 yrs)	—	$38,220
Accumulated quarantined CF losses	Nil	$398,000
Value of CF losses at sale (@ 39%)	Nil	~$155,220
CGT payable at sale	~$138,645	~$29,640
CGT saving	—	~$109,005
ESTIMATED 10-YEAR ADVANTAGE — SCENARIO B	—	~$147,225 better off

 

The $147,225 figure is not a marginal difference. It represents the cumulative cost of a structural decision that prioritises the appearance of tax strategy – “I’m keeping negative gearing” – over the financial substance of debt efficiency.

The Principle the Budget Did Not Change

Maximise deductible debt. Minimise non-deductible debt. This was the right framework before the Budget. It is the right framework after it.

The Budget restricted when rental losses can be used, it did not change the fact that deductible interest is worth 39 cents in the dollar and non-deductible interest is worth nothing. The decision to borrow $1,100,000 for non-deductible purposes instead of deductible ones is not a tax strategy. It is a $19,344-per-year cost, compounding over the life of the loan.

The Swap also produces a positively geared investment property, and here is the important nuance that is often missed. Positive gearing is not automatically a good outcome. In Scenario A, the $9,800 of net rental income is taxable, adding to the tax bill, while $68,200 of interest is being paid with no relief at all. Being positively geared on the IP while carrying $1,100,000 of non-deductible debt is the worst of both worlds.

Carried-forward losses are not a consolation prize under the new rules. They are a deduction bank. An investor who accumulates $398,000 in quarantined losses over ten years and then sells a property with a $474,000 gain pays tax on $76,000, not $474,000. That is the design of the carry-forward mechanism, and it works exactly as intended.

Is There Ever a Case for The Swap?

In the interest of balance, converting an existing home to an investment property can make sense where:

– The move was already planned for personal reasons, independent of the Budget, and the investment case for the property stands on its own merits.

– The new PPoR is being purchased without debt, for example, a downsizer using sale proceeds or superannuation, eliminating the non-deductible debt problem entirely.

– The MRE has already been partially eroded (e.g. the property has been rented under the 6-year absence rule), reducing the incremental CGT cost of conversion.

– The borrowing structure has been formally reviewed and documented by a tax adviser to confirm deductibility of the existing mortgage on change of use.

But in the common version of this decision, converting in reaction to the Budget to preserve grandfathered negative gearing, the numbers in this article illustrate why the reaction is often more expensive than the problem it is trying to solve.

The Bottom Line

The 2026–27 Budget changes to negative gearing are real. But they have not changed the most important rule in property investment finance:

The debt that generates a tax deduction is worth significantly more than the debt that does not. Structure your borrowing accordingly.

Scenario A carries $1,100,000 of non-deductible debt and $300,000 of deductible debt. Scenario B carries $300,000 of non-deductible debt and $1,100,000 of deductible debt. Same total. Completely inverted efficiency. The 10-year financial gap is approximately $147,000.

Before restructuring your property holdings in response to Budget headlines, model the full picture: total debt quantum, which debt is deductible and why, annual after-tax cash flow, the carry-forward loss position, and the CGT consequence at the end. The answer is often that the existing structure, or a different one entirely, is significantly more valuable than The Swap.

 

Want to model your own situation?

The numbers in this article are illustrative. The actual figures depend on your specific debt structure, cost bases, marginal rate, rental yield, and holding period. If you would like to work through what these numbers look like for your circumstances, please get in touch.