Understanding the basics of negative gearing

What negative gearing means for property investors

Negative gearing occurs when the cost of holding a rental property exceeds the rental income it generates, creating a net loss that reduces your taxable income. For properties purchased before 12 May 2026, these losses can be offset against your salary or other income, lowering your overall tax bill. From 1 July 2027, properties acquired after that announcement date will have those losses quarantined, meaning they can only offset rental income or carried forward against future property gains.

The distinction matters because Darwin's rental market has shifted meaningfully in the past two years. Vacancy rates that sat around 1 per cent in late 2024 have moved closer to 3 per cent, and asking rents for units in the CBD and suburbs like Parap have pulled back from their cyclical peak. If you're relying on a property to generate positive cash flow from day one, the numbers may not land where you expect. If you're comfortable carrying a loss and using it to reduce tax on other income, the window to do so under the existing framework is narrowing.

How the 2027 negative gearing changes apply to Darwin investors

The Treasury Laws Amendment (Tax Reform No. 1) Act 2026 received Royal Assent on 26 June 2026 and takes effect on 1 July 2027. Properties acquired on or after 7:30pm AEST on 12 May 2026 will have net rental losses quarantined unless they qualify as eligible new builds. That means a unit purchased in The Cloisters or an established house in Nightcliff bought after that date cannot have its loss offset against your wage income from next financial year onward. The loss carries forward and can be used against future rental income from any residential property you own, or against capital gains when you eventually sell.

Properties you already owned at 7:30pm on 12 May 2026, or those under contract at that time, remain grandfathered. You can continue to offset losses against salary and other income until you dispose of the asset. If you exchanged contracts on 10 May 2026 but settled in July, you retain access to the existing rules.

Eligible new builds are exempt from quarantining. A dwelling constructed on previously vacant land, or a development that increases the number of dwellings on a site, allows the purchaser to offset losses against any income. A knock-down rebuild that replaces one house with one house does not qualify. If a new build is occupied by the developer or another party for more than 12 months before being sold to you as an investor, it loses that exemption in your hands.

Why interest-only loans are common for negatively geared properties

An interest-only loan requires you to pay only the interest component for an agreed period, typically one to five years, with no reduction in the loan balance. This keeps your monthly repayment lower and maximises the deductible interest expense, which is the primary tax benefit of negative gearing. Once the interest-only period ends, the loan reverts to principal and interest unless you negotiate a new interest-only term.

Consider a Darwin investor borrowing $450,000 at a variable rate to purchase a two-bedroom unit in Larrakeyah. On an interest-only basis, the annual interest cost might be around $22,000, depending on the rate at the time. On principal and interest, the repayment would be higher because each payment also reduces the loan balance. The lower monthly commitment on interest-only can make a negatively geared property more affordable to hold, particularly if rental income is under pressure or if you're managing multiple properties.

Lenders apply the same serviceability buffer to interest-only applications as they do to principal and interest, currently three percentage points above the product rate. Some lenders cap interest-only at 80 per cent loan to value ratio for investors, though others will go to 90 per cent if you pay Lenders Mortgage Insurance. The interest-only period is not permanent, and you need a plan for either refinancing, selling, or absorbing the higher repayment when principal starts being repaid.

Calculating the tax benefit under current and future rules

Under the rules that apply until 30 June 2027, and for grandfathered properties beyond that date, you add up all the costs of holding the rental property for the financial year. Interest on the loan, council rates, building insurance, strata levies if applicable, property management fees, repairs and depreciation all form part of that calculation. Rental income is subtracted from that total. If the result is negative, that loss reduces your assessable income.

For a Darwin investor on a marginal tax rate of 37 per cent holding a property with a $15,000 annual loss, the tax saving is roughly $5,550. The actual cash shortfall you need to fund is $9,450. That shortfall is being absorbed in exchange for holding an appreciating asset and benefiting from the capital gains tax discount when you eventually sell.

From 1 July 2027, if the property was acquired after 12 May 2026 and is not an eligible new build, that $15,000 loss is quarantined. You carry it forward and offset it against rental income in a future year when the property is positively geared, or apply it to reduce the capital gain on sale. You receive no immediate reduction in tax on your salary. The property still costs you $15,000 out of pocket each year, but the tax relief is deferred until a later event.

How APRA's debt-to-income cap affects investor borrowing in Darwin

The debt-to-income cap that took effect on 1 February 2026 limits the share of new investment loans a lender can write at six times gross income or higher to 20 per cent of their investor portfolio. If your household income is $120,000 and you're applying to borrow $750,000, your DTI is 6.25. That application falls into the capped bucket, and the lender may decline it or require you to reduce the loan amount, even if you meet serviceability under the three per cent buffer.

Loans for newly constructed dwellings are exempt from the DTI cap, which creates an additional incentive to consider new builds in growth corridors such as Zuccoli or Muirhead. If you're buying a first investment property using equity from your owner-occupied home and the combined borrowing pushes you above six times income, expect the lender to ask for a larger deposit or a lower purchase price. Some lenders have tightened investor policy further in response to the cap, particularly for applicants with existing investment debt.

Eligible new builds and how the carve-out changes the strategy

An eligible new build under the 2027 reforms must be a dwelling constructed on land that was vacant at the time construction began, or a development that increases the number of dwellings on the site. A subdivision in Bellamack that delivers a new house on a greenfield block qualifies. A house in Fannie Bay that is demolished and replaced with a single new dwelling does not, because the number of dwellings has not increased. A duplex replacing a single house on the same lot does qualify, because two dwellings now exist where one did before.

The carve-out allows you to offset losses from eligible new builds against any income, including wages, under the post-2027 rules. You also receive an election at the time of sale to choose between the standard 50 per cent capital gains tax discount or cost base indexation with a 30 per cent minimum tax rate. That election is not available for established properties acquired after the announcement date.

Darwin's new build market is constrained by construction cost and insurance premiums that are materially higher than the southern capitals. House and land packages in suburbs such as Johnston or Bellamack might offer access to the carve-out, but the purchase price and holding costs often exceed what you would pay for an established unit closer to the city. You need to weigh the tax benefit against the acquisition cost and the longer-term demand for housing in those growth areas.

What happens if you already own a negatively geared property

Properties you held at 7:30pm AEST on 12 May 2026 remain grandfathered indefinitely. You continue to offset losses against your salary and other income until you sell. If you refinance the loan, the grandfathering is not affected, provided the property itself was owned at the cut-off time. If you refinance your investment loan to access a lower rate or release equity for another purpose, the existing negative gearing treatment continues.

If you sell a grandfathered property and use the proceeds to buy another, the new property is subject to the post-2027 rules unless it is an eligible new build. The grandfathering does not transfer to replacement assets. That creates a lock-in effect for investors who might otherwise trade up or relocate their capital into a different market.

If you're considering expanding your property portfolio and you already hold grandfathered assets, the next acquisition will be subject to quarantining unless it meets the new build criteria. You may choose to retain the existing property and delay further investment, or accept that future losses will be carried forward rather than offset immediately.

Rental income assumptions and Darwin's vacancy cycle

Darwin's rental market moves in pronounced cycles tied to major projects, defence activity and public sector employment. Vacancy rates that were below 1 per cent in late 2024 have since moved above 3 per cent, and asking rents for units in the CBD and inner suburbs such as The Gardens and Stuart Park have softened. If you're modelling rental income for an investment property, assume a vacancy rate of at least one month per year and factor in property management fees of around 8 per cent of gross rent, which is typical for the Darwin market.

A two-bedroom unit in Parap that achieves $550 per week in rent generates $28,600 annually before vacancies and fees. After one month of vacancy and management costs, net rental income is closer to $23,800. If your annual holding costs including interest, rates, insurance and strata are $32,000, the property is negatively geared by $8,200. That loss is deductible under current rules or quarantined under the post-2027 framework, depending on when the property was acquired.

Rental income is assessable in the year it is received or due, and all outgoings incurred in producing that income are claimable in the same year. Repairs are deductible immediately, while capital improvements such as a new kitchen or bathroom are added to the cost base and only affect your capital gains tax calculation on sale. Depreciation on the building and fixtures is claimable using the rates set by the ATO, though recent changes have removed plant and equipment depreciation for established residential properties acquired after certain dates.

Using equity from your owner-occupied home to fund a deposit

If you own a home in Darwin or elsewhere and have built up equity, you can access that equity to fund the deposit on an investment property without selling your existing home. Lenders assess equity release by valuing your current property and calculating how much you can borrow against it while staying within their loan to value ratio limits. For investor purposes, most lenders cap total borrowing at 80 to 90 per cent of the security value across all properties.

The portion of the loan used to acquire or hold the investment property generates deductible interest, while any portion used for private purposes does not. If you borrow an additional $100,000 against your home and use $90,000 for the deposit on a rental property and $10,000 to renovate your own kitchen, only the interest on the $90,000 is deductible. Lenders do not automatically split loan accounts for tax purposes, so you need to keep records that trace the use of funds and may need to set up separate splits at the time of drawdown.

Serviceability is assessed on your total debt, including the new borrowing and the increased repayment on your home loan. If the investment property is negatively geared, the rental income will be shaded by at least 20 per cent under most lender policies, meaning only 80 per cent of the gross rent is counted toward your income for serviceability. The shortfall needs to be funded from your salary or other verifiable income, and the lender applies the three per cent buffer to ensure you can still meet repayments if rates rise.

When to speak to a broker about structuring your investment loan

The interaction between the 2027 tax changes, APRA's debt-to-income cap, lender-specific investor policies and your own financial position creates a decision tree that is difficult to navigate without specialist input. If you're considering a property acquired after 12 May 2026, you need to understand whether quarantining applies, how long you expect the property to remain negatively geared, and whether you have other rental income to offset those losses in future years. If you're looking at a new build, you need to confirm it meets the eligible criteria and compare the acquisition cost to an established alternative.

A broker with access to investment loan options from banks and lenders across Australia can model different scenarios using your actual income, existing debt and the property you're considering. They can also identify lenders that remain active in the Darwin market for investors and those that offer rate discounts or feature flexibility that may not be advertised. Some lenders have reduced their appetite for interest-only loans or tightened loan to value ratio limits for certain postcodes, and those changes are not always published on comparison sites.

Call one of our team or book an appointment at a time that works for you. We'll walk through your situation, explain how the 2027 changes affect your specific circumstances, and structure a loan that aligns with your property investment strategy and cash flow.

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