Glossary
Negative gearing is borrowing to invest in a property whose rental income does not cover its expenses, with the shortfall deductible against your other income. It is a tax discount on a loss - and the strategy only pays if capital growth outruns the accumulated losses.
Negative gearing is borrowing to buy an income-producing asset - in practice, almost always an investment property - where the rent does not cover the running costs. The shortfall between the rent and the costs of loan interest, rates, insurance, maintenance, management fees and depreciation is a deductible loss that reduces your taxable income from other sources. A $10,000 shortfall at a 39 percent marginal rate - the 37 percent bracket plus the Medicare levy - trims your tax bill by roughly $3,900.
The term is a political football, but the mechanics are just the tax system. The ATO allows the deductions while the property is genuinely available for rent, and the 50 percent capital gains tax discount on eventual sale is the other half of the strategy. Negative gearing is not a return - it is a subsidy on a loss. The property has to grow in value by more than the accumulated after-tax losses before the strategy pays. Interest-only loans are common in the setup, which keeps the deductible costs at their maximum while the principal stays untouched.
Walk one year. You buy an $800,000 property with a $640,000 interest-only loan at 6 percent: $38,400 of interest. Rent comes in at $650 a week - $33,800 a year - and other costs run $6,200 across rates, insurance, management and maintenance. The shortfall is $10,800, which reduces your taxable income and saves roughly $4,200 of tax at a 39 percent marginal rate. The net annual cost of holding the property is roughly $6,600 after tax - money out of pocket, every year.
The depreciation layer is where the paperwork earns its keep. The building's structure and fittings depreciate under Division 40 and Division 43 of the tax rules, adding a paper deduction that costs nothing in cash each year - a quantity surveyor's depreciation schedule documents it. The ATO requires the property to be genuinely available for rent: a deliberately vacant property, or rents set unrealistically high, forfeits the deductions. The negative gearing calculator runs the full cash flow including the depreciation.
The exit is where the strategy is judged. Selling triggers capital gains tax on the gain, with the 50 percent discount applying to properties held beyond twelve months - the discount halves the taxable gain but not the gain itself. For the strategy to pay, the capital growth has to exceed the accumulated after-tax losses plus the transaction costs of exit. Run the ten-year ledger through the rental property calculator before buying, not after.
For an Australian reader, negative gearing is the most politically argued term in property, and the least understood on its own numbers. The deduction is real: the ATO allows the shortfall against your other income, and the strategy exists because of it. But the deduction is a discount on a loss - saving $4,200 of tax by spending $10,800 of after-tax cash is not arithmetic that pays for itself. The capital gains tax entry covers the discount that applies at the exit. The strategy only works if capital growth outruns the accumulated losses, and MoneySmart's guidance on investment properties treats the tax benefit as one input, not the thesis.
A colleague named Brent (yes, that Brent) bought a $700,000 apartment because the accountant said the refund would be $8,000. He never modelled whether the suburb's growth would outrun the losses the refund was costing him. The refund arrived on schedule; the growth did not. The highest-leverage thing most Australians can do is run the ten-year ledger - costs, growth, exit costs, CGT - through the negative gearing calculator before the auction. Buy the property the numbers support, not the refund the accountant promises.
The property rents for $650 a week - $33,800 a year - against $38,400 of interest on the interest-only loan and $6,200 of other costs. The shortfall is $10,800, deductible against your other income, saving roughly $4,200 of tax at a 39 percent marginal rate. The net annual cost is roughly $6,600 out of pocket: the tax saving is a discount on the loss, not a profit. Only the depreciation claim adds a deduction without cash leaving the account.
A property with an $18,000 annual shortfall at a 39 percent marginal rate generates a refund of roughly $7,000 - and costs $11,000 of after-tax cash every year to hold. Over five years the cumulative out-of-pocket cost is roughly $55,000, before transaction costs. For the strategy to pay, the property has to grow by more than the accumulated losses plus the costs of exit - and the growth has to survive the sale, the agent fees and the capital gains tax. The refund is the headline; the losses are the product.
The same property held ten years: after-tax costs accumulate to roughly $110,000, including the net annual losses and the paper deductions that never cost cash. At 6.5 percent a year in capital growth, the $800,000 purchase grows to roughly $1.5 million - a nominal gain of $700,000. Selling costs roughly $30,000 in agent fees, and capital gains tax on the discounted gain runs roughly $136,000 at a 39 percent marginal rate. The net proceeds of roughly $693,000 clear the accumulated losses - which is the strategy working, and why the growth assumption is the entire thesis.
Mistake: Buying the property for the tax refund instead of the return.
Why it bites you: The refund is a discount on a loss - roughly $7,000 of refund for an $18,000 shortfall. Brent bought the refund and the growth never arrived.
Mistake: Assuming rent will cover future rate rises.
Why it bites you: Each percentage point on a $640,000 loan adds roughly $6,400 a year to the shortfall. Rate rises widen the loss faster than rents catch up.
Mistake: Claiming deductions while the property is not genuinely available for rent.
Why it bites you: The ATO denies deductions on deliberately vacant properties or unrealistic rents, and amended assessments follow. The genuinely-available test is the ATO's gate on the whole strategy.
Mistake: Forgetting the exit costs when the strategy is modelled.
Why it bites you: Agent fees, capital gains tax and the discount's twelve-month rule sit at the exit. A ten-year ledger without them overstates the outcome by six figures on a mid-priced property.
I spent a weekend running twenty property scenarios through the negative gearing calculator - different rates, rents, growth assumptions and exit years - so you don't have to, and the pattern never moved: the strategy pays only when the growth assumption carries it, and the tax refund is a discount on the loss you are choosing to hold. The refund arrived on schedule in every scenario. The profit arrived only in the scenarios where the growth did.
The framing I use is one line: negative gearing is a subsidy on a loss, and the subsidy is the least interesting number on the page. Brent bought the subsidy. The highest-leverage thing is the ten-year ledger - costs, growth, exit, CGT - run before the auction, with the growth assumption priced honestly. If the ledger needs 8 percent growth to pay, ask what the suburb has actually delivered, not what the seminar promised.
It is a tax treatment, not a strategy - the strategy is the property and its growth. The deduction saves tax on a loss, and the loss has to be recovered through capital growth for the investment to pay.
The saving is the shortfall multiplied by your marginal rate: an $18,000 shortfall at a 39 percent marginal rate saves roughly $7,000. The property still costs the remaining $11,000 out of pocket each year.
Yes. The same deduction rules apply to borrowing for listed investments through a margin loan, and the interest is deductible against your other income. The risks are different: share losses carry no rent floor, and margin calls can force sales.
Yes - it applies to any asset held beyond twelve months, including investment property. It halves the taxable gain on sale, which is the second half of the strategy's arithmetic.
The ATO requires the property to be genuinely available for rent, and a long vacancy can undermine the deductions. Advertise at market rent, document the campaigns, and the deductions generally survive - deliberate vacancy forfeits them.
Disclaimer: This information is general in nature and does not constitute financial or legal advice. Always consult a qualified professional for your specific situation.

Financial Chaos Analyst
Ivy Sinclair-Wren is a Financial Chaos Analyst covering investing, AI, wealth psychology, and the emotional consequences of opening finance apps during market crashes. Based in Melbourne, she specializes in demystifying the Australian tax code and helping users navigate the intersection of spreadsheet logic and human irrationality.