The Fine Print Australia · PUBLISHED 27 JUN 2026 · VERIFIED 27 JUN 2026 · AU EDITION

Negative Gearing & Housing Affordability: The $5 Billion Tax Subsidy 🇦🇺

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A single investor tax deduction can shave enough off taxable income that, in 2020–21, 2.25 million Australians claimed rental deductions across 3.25 million properties, showing negative gearing is not a niche loophole but a mass-market tax subsidy tied to housing investment.

The number that matters

The central number is $4.6B: Treasury’s estimate of the 2008–09 budget cost of negative gearing in Australia.

How it quietly costs you

Negative gearing reduces an investor’s taxable income when rental expenses exceed rental income, which makes borrowing to buy property more attractive and can increase demand for existing dwellings rather than new supply.

Treasury’s paper explicitly argues there is a strong case that negative gearing raises prices of existing real estate and therefore diminishes housing affordability for would-be buyers.

The quantified fiscal cost was $4.6B in 2008–09 for negative gearing alone, which Treasury said could have been used for other purposes including affordable housing.

Old vs better: Treasury’s cited analysis says that instead of flowing into tax concessions for leveraged investors, the same revenue could have funded nearly 20,000 new “affordable” homes each year.

The second, compounding trap

A second pressure point is the capital gains tax discount, which interacts with negative gearing to encourage speculative buying of established homes rather than long-term rental supply.

ACOSS estimated that in the relevant year the capital gains tax discount cost $5B and negative gearing added another $2B, and argued the combination encourages over-investment in existing properties and lifts house prices without materially increasing affordable supply.

That matters because higher investor demand can push up prices for owner-occupiers as well as rents over time, extending the period households stay in the rental market.

Long-run cost: ACOSS says these tax settings fuel housing price booms and worsen affordability, while Treasury’s material says negative gearing can work against supply by favouring established dwellings over new construction.

What this looks like in practice

Mia, 34, is a nurse in Brisbane earning $92,000 a year, with $65,000 saved for a deposit and about 15 years to retirement; she rents while trying to buy her first home and competes with leveraged investors for entry-level houses.

She would discover:

• Discovery 1: She is competing in a market where 2.25 million taxpayers claimed rental deductions in 2020–21, and 47% of those investors were negatively geared, meaning the tax advantage is widespread rather than occasional.
• Discovery 2: A reform model cited in the debate found removing negative gearing could increase the average homeownership rate by 5.5%, implying materially better odds for first-home buyers than the status quo.
• Discovery 3: The same model found 76% of households would prefer an economy without negative gearing, which is a strong comparison against the common claim that the policy mainly helps “mom-and-dad” renters.

The full cost of doing nothing

For a buyer like Mia, the combined effect of investor tax incentives can be framed as a pressure stack: Treasury says negative gearing can lift established-property prices, while modelled reform suggests removing it could raise homeownership by 5.5%.

A conservative modelling basis for the combined lifetime/career cost is that she faces a higher purchase price today and slower entry into ownership over the next 15 years, with the price effect driven by investor demand and the homeownership effect taken from the RBA workshop model.

What to do about it

• Check your super balance and fees

• Use myGov → ATO online and compare housing costs against your retirement savings position.

• Log in to myGov, open ATO online, and review your income, deductions, and savings capacity.

• Note your current deposit gap and whether rent is delaying ownership.

• Compare your progress against a target that keeps you on track for a deposit before the next rate or price move.

• Good looks like a clear deposit plan and no unnecessary tax leakage in your own return.

• Compare your super fund

• Use the ATO YourSuper comparison tool to see whether your super is costing more than necessary.

• Search your fund, check the annual fee estimate, and compare returns and fees.

• Identify whether high fees are eating into money that could support a future deposit.

• Compare your fund against lower-fee alternatives listed in the tool.

• Good looks like fees near the lower end of the market, not the median.

• Estimate your tax position before buying

• Use ATO individual tax estimates / lodging tools in ATO online to test whether rental deductions would actually help you.

• Enter your expected income, interest, and likely rental loss.

• Check whether the deduction meaningfully offsets tax or merely subsidises a larger loan.

• Compare the tax saving against the true cash loss on the property.

• Good looks like decisions based on after-tax cash flow, not just headline deduction size.

A myth worth clearing up

Myth: Negative gearing mainly increases rental supply, so it helps renters as well as investors.

Fact: Treasury’s material says negative gearing tends to favour established dwellings and can raise prices of existing real estate, while the RBA workshop model found removing it would increase homeownership by 5.5%.

Sources

• https://treasury.gov.au/sites/default/files/2019-03/Equality-Rights-Alliance-att-2.pdf
• https://www.rba.gov.au/publications/workshops/research/2017/pdf/rba-workshop-2017-simon-cho-may-li.pdf

Researched 2026-06-27.

Corrections & disclosure: an AI-assisted, human-reviewed guide. Every figure is dated and sourced above. Spot something out of date or wrong? Tell us and we’ll correct it — corrections are noted here and in the video description.