Australian Negative Gearing Guide: How It Works, Deductible Expenses and the Investment Decision

An investment is negatively geared when its deductible expenses exceed its assessable income - producing a net investment loss that can be offset against other taxable income (salary, business income, or other investment income). In Australia, this offset is permitted under standard income tax rules - there is no special 'negative gearing concession'. The tax benefit arises because offsetting a loss against other income reduces the tax payable on that other income.

For investment properties, negative gearing occurs when the total deductible costs - mortgage interest, property management fees, council rates, insurance, repairs and maintenance, depreciation, and other expenses - exceed the gross rental income received. The net loss reduces your assessable income and the tax saving equals the net loss multiplied by your marginal tax rate.

Example: an investment property generating $24,000 in annual rental income with $35,000 in total deductible expenses produces an $11,000 net loss. For a taxpayer on the 39% marginal rate (37% + 2% Medicare), the tax saving is $4,290. The actual cash cost of the investment is $11,000 (the net loss) minus $4,290 (tax saving) = $6,710 per year from pocket. The investor's thesis is that capital growth in the property's value will exceed this cash cost over time.

The following expenses are generally deductible in the year incurred for an investment property that is rented or genuinely available for rent: mortgage interest (only the interest component - principal repayments are not deductible); property management fees; council rates and water rates; landlord insurance; body corporate fees (strata levies); repairs and maintenance (not improvements - see below); property advertising for tenants; pest control; bank fees on the investment loan account; accountant fees for preparing the property's tax schedule; and travel expenses to inspect the property (limited from July 2017 - now only deductible for certain residential property investors).

Repairs and maintenance are deductible in the year incurred - but must be genuine repairs (restoring something to its original condition), not improvements (which are capital expenditure added to the cost base). Replacing a broken hot water system with an equivalent model is a repair; replacing a single-sink kitchen with a new double-sink kitchen is an improvement. The distinction matters - repairs are immediately deductible; improvements are not.

Borrowing costs (loan establishment fees, mortgage stamp duty on the loan, title search fees, lender's mortgage insurance) are not immediately deductible - they are deducted over 5 years or the loan term (whichever is shorter). Prepaid expenses (e.g., paying 12 months of landlord insurance in advance in June) may be deductible in the current year or spread - specific rules apply to prepaid expenses.

Interest deductibility requires the loan to be used for income-producing purposes. If you redraw from your investment loan for personal purposes, the redrawn amount's interest is not deductible. Maintain meticulous separation of investment loan redraws - contaminating the loan with personal use can make a portion of the interest non-deductible permanently.

Depreciation is one of the most significant deductions for investment property investors - and one most commonly missed without a quantity surveyor's schedule. Two types of depreciation apply to investment properties:

Division 43 (building allowance): a deduction for the decline in value of the building structure itself. Residential buildings constructed after 15 September 1987 can be depreciated at 2.5% per annum of the original construction cost - not the purchase price. If the original construction cost was $200,000, the annual Division 43 deduction is $5,000, regardless of how long you have owned the property.

Division 40 (plant and equipment): a deduction for the decline in value of removable assets - carpet, blinds, dishwashers, air conditioning, hot water systems, and similar items. Each item is depreciated at its effective life rate. For residential properties purchased after 9 May 2017, Division 40 depreciation can only be claimed on new assets you install - not on pre-existing plant and equipment that was already in the property at purchase.

A quantity surveyor's depreciation schedule (cost typically $400–$700 for residential property) identifies all eligible depreciation deductions and documents the construction cost estimates required for Division 43. For a property with $8,000–$12,000 in annual depreciation deductions, the schedule pays for itself many times over. The depreciation schedule is prepared once and used for the life of the property's ownership.

Negative gearing works best when combined with capital growth - the tax saving reduces the cash cost of carrying the investment, while the property appreciates in value. The CGT on sale is the price paid for the capital growth. Understanding this interaction is essential to evaluating the strategy honestly.

Division 43 building allowance deductions claimed during ownership reduce the property's cost base for CGT purposes. Each year of Division 43 deductions claimed reduces the cost base dollar-for-dollar. A property with $5,000 per year in Division 43 deductions over 10 years has $50,000 deducted from its cost base - meaning a higher capital gain on sale. The tax saving during ownership ($5,000 × marginal rate) is partially reclaimed by the ATO through the reduced cost base on sale.

The 50% CGT discount applies to properties held for more than 12 months - halving the taxable capital gain on sale. This discount applies regardless of the depreciation deductions claimed during ownership. The combination of depreciation deductions during ownership (at marginal rate) and the 50% CGT discount on sale (at effective 23.5% rate at the top marginal rate) creates a tax timing benefit: deductions during ownership at 47%, capital gain on sale at 23.5%.

The six-year main residence rule can also interact with negative gearing: a former primary residence that is rented out can be treated as the main residence for CGT purposes for up to six years after moving out. However, once a property is income-producing, negative gearing deductions can only be claimed for the income-producing period.

Negative gearing applies to any income-producing investment, not just property. An investor who borrows to buy shares (via a margin loan or portfolio loan) can negatively gear those shares - the interest on the loan is deductible against dividend income, and a net loss offsets other income.

Negative gearing shares differs from property in key ways: shares can be sold immediately if the margin call exceeds available cash (forced sale risk); there is no depreciation deduction (no building or plant and equipment); dividends from Australian shares carry franking credits that further offset tax; and the volatility of share prices means the capital growth thesis is less predictable year-to-year than property.

The tax rules are identical - interest on borrowings to invest in income-producing shares is deductible. A $200,000 margin loan at 8% per annum generates $16,000 in annual interest deductions. If the portfolio generates $12,000 in dividends, the net investment loss of $4,000 reduces taxable income. The same marginal rate tax saving calculation applies as for property.

Negative gearing is not intrinsically good or bad - it is a tax mechanism whose value depends on whether the underlying investment generates sufficient capital growth to justify the net cash cost after the tax saving.

The tax saving from negative gearing reduces the cost of carrying the investment - it does not eliminate it. A property with a $10,000 annual net loss at the 47% marginal rate generates a $4,700 tax saving, leaving a $5,300 net cash cost. Over 10 years, that is $53,000 in after-tax cash outlay (ignoring changes in rental yield and interest rates). For the investment to be worthwhile, the capital growth over that period must exceed the total after-tax cash outlay plus the CGT on sale.

Negative gearing is most advantageous for: investors on high marginal rates (47%) where the tax saving is largest; properties in high-growth markets where appreciation is likely to exceed the after-tax carrying cost; investors with a long holding horizon (the 50% CGT discount rewards patience, and the carrying cost is amortised over more years); and investors who can sustain the cash flow deficit without stress.

Positive gearing (where rental income exceeds all expenses and produces taxable profit) requires no capital growth thesis to succeed - the investment pays for itself and generates income from day one. Positive gearing opportunities are typically found in higher-yield markets (regional areas, outer suburbs) with lower capital growth prospects. The optimal investment is neither maximally negative nor maximally positive - it is the property with the best combination of yield, growth, and risk that fits your personal cash flow.

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Review these items if you are considering or currently using negative gearing:

• Commission a quantity surveyor's depreciation schedule before your first tax return - it pays for itself in the first year for most established properties
• Separate repairs (immediately deductible) from capital improvements (added to cost base) - keep records and get a written quote categorising work before proceeding
• Never redraw from an investment loan for personal purposes - contaminating the loan permanently reduces deductible interest
• Keep meticulous records of all deductible expenses - receipts, invoices, and bank statements for council rates, insurance, management fees, and repairs
• Claim borrowing costs over 5 years or loan term - many investors miss this deduction
• Model the full after-tax cash cost of the investment - tax saving reduces carrying cost but does not eliminate it
• Evaluate the capital growth assumption critically - negative gearing only makes financial sense if capital growth exceeds total after-tax carrying cost
• Understand the Division 43 cost base reduction - depreciation deductions reduce the cost base and increase the eventual CGT liability
• Hold for 12+ months before selling to access the 50% CGT discount on the capital gain
• Consider the six-year main residence rule if converting your home to a rental - it may preserve CGT exemption for up to 6 years

Negative gearing is a tax-timing strategy, not a free lunch - the tax saving during ownership is partially reclaimed through a reduced cost base on sale. Evaluate each investment on its total return, not just its tax benefit.