Common Mistakes When Rentvesting as a Legal Assistant

Assuming Negative Gearing Still Works the Old Way

From 1 July 2027, net rental losses on residential investment properties purchased after 7:30pm AEST on 12 May 2026 cannot be offset against your salary. Those losses are quarantined and can only offset future residential rental income or capital gains from the same property. The old rule, where you could reduce your taxable income from legal assistant wages using rental losses, applies only to properties held before that date or properties classified as eligible new builds.

Consider a legal assistant who bought an established two-bedroom unit in Parramatta in September 2026 intending to rentvest while continuing to rent closer to their city firm. Rental income covers part of the mortgage, but the property runs at a loss of $8,000 annually after interest, strata, rates and insurance. Under the new quarantine, that $8,000 cannot reduce their assessable income. The loss carries forward and can offset future rental income or a capital gain when the property is sold, but provides no immediate tax benefit against salary. This changes the cash flow calculation for anyone planning to buy their first investment property instead of an owner-occupied home.

Eligible new builds remain exempt from the quarantine. A new build means construction on previously vacant land or a development that increases the number of dwellings on the site. A knock-down rebuild that replaces one dwelling with one dwelling does not qualify. If the new build is occupied by someone else for more than 12 months before you buy it, the exemption is lost for you as the subsequent investor.

Overlooking the DTI Cap When Borrowing as a Renter

APRA's debt-to-income cap limits lenders to funding no more than 20 per cent of new investor loans at a DTI of 6 times gross income or higher. That cap applies separately to the investor loan book, so competition for those higher-ratio loans is concentrated among property investors. If your total debt across all loans exceeds six times your gross annual income, your application may be declined or referred to a different lender even if serviceability and deposit are adequate.

As a legal assistant earning $75,000 gross annually, your DTI threshold is $450,000. If you already have a car loan with $25,000 outstanding and you apply for an investment loan of $450,000, your total debt is $475,000 and your DTI is 6.3. Some lenders will decline that application outright under their internal settings. Others will assess it but count it against their 20 per cent cap, which may already be exhausted for the reporting period. Paying down or clearing the car loan before applying can bring you below the 6 times threshold and open access to the other 80 per cent of the lender's investor book where approval is more routine.

The DTI cap does not apply to finance for newly erected dwellings as defined in ARS 701.0 or to construction loans. If the investment property is a brand-new dwelling purchased from a developer, the DTI restriction is lifted. That regulatory carve-out is separate from the negative gearing exemption and uses a different definition, so confirm eligibility with the lender before assuming both concessions apply.

Misunderstanding What Counts as an Eligible New Build

The definition of an eligible new build for negative gearing purposes is narrower than many buyers expect. It requires construction on previously vacant land or a development that increases the total number of dwellings. A knock-down rebuild that replaces one house with one house does not qualify, even if the new dwelling is brand new and has never been occupied.

A legal assistant looking at a townhouse development in Campbelltown where an old weatherboard has been demolished and replaced by three torrens-title townhouses would find each of those townhouses qualifies as an eligible new build because the development increased dwelling numbers from one to three. If instead the weatherboard was demolished and replaced by a single architect-designed house, that replacement does not qualify regardless of how new or modern the construction is.

Occupancy also affects eligibility. If a developer or first owner occupies the new build for more than 12 months before selling, the subsequent investor purchaser loses access to the negative gearing exemption. You must confirm the occupancy history and the nature of the development before relying on the exemption. ATO guidance on what constitutes an increase in dwelling numbers and how occupancy periods are measured is still being released, so verification with a tax adviser is necessary before settlement.

Ignoring Loan Structuring for Future Portfolio Growth

When your investment property is your first purchase, the way you structure the loan affects your ability to access equity later for either an owner-occupied home or further investment property. Choosing principal and interest repayments on an investment loan reduces the debt balance over time but also reduces your tax-deductible interest. Choosing interest-only preserves the deductible debt but requires you to service a higher ongoing repayment once the interest-only period expires.

If you plan to buy an owner-occupied property within a few years, keeping the investment loan interest-only for the first five years and making additional repayments into an offset account gives you flexibility. The offset reduces interest cost without reducing the deductible loan balance, and the cash in the offset can be redeployed as a deposit on the owner-occupied property when you are ready. Once you move to owner-occupier borrowing, many lenders offer LMI waivers or discounts for legal professionals, which can make the transition more affordable. You can explore those options through our pages on LMI waivers for lawyers and low deposit loans for lawyers, which also apply to legal assistants at many lenders.

Structuring matters even more under the new negative gearing rules. If your rental losses are quarantined and you cannot offset them against salary, the cash flow burden increases. An offset account lets you reduce interest cost without permanently paying down the loan, preserving deductible debt for when the property generates positive income or you sell and realise a capital gain.

Failing to Account for Serviceability Buffer and Vacancy in Your Application

Lenders assess investment loan serviceability using a buffer of 3 percentage points above the product rate, and they typically assume rental income will cover only 80 per cent of the assessed market rent to allow for vacancy and maintenance periods. That means even if your rental income comfortably covers the actual repayment, the lender's serviceability test assumes a higher rate and lower income.

In our experience, legal assistants often underestimate how much the buffer and vacancy rate reduce their borrowing capacity compared to an owner-occupied loan. If you earn $75,000 and the investment property generates $28,000 annually in rent, the lender will assess serviceability using $22,400 rental income and a repayment calculated at the product rate plus 3 per cent. That difference can reduce your maximum loan amount by $50,000 to $80,000 compared to what an online calculator suggests when you input the actual rate and full rental income.

Before applying, request a formal borrowing capacity assessment that incorporates the buffer and the 80 per cent rental income assumption. That assessment should also reflect your current liabilities, including any car loan, HECS debt or credit card limit. If your borrowing capacity falls short of what you need, paying down debt or increasing your deposit are the two levers you control. Alternatively, if you have a family member willing to act as guarantor, a guarantor loan can cover part of the shortfall without requiring you to save a larger deposit, though the guarantor takes on contingent liability until you build enough equity to release them.

Not Seeking Specialist Advice Before Settling

The Tax Reform Act received Royal Assent on 26 June 2026, but supporting regulations and ATO guidance are still being released. The interaction between quarantined losses, the new CGT indexation rules and the definition of eligible new builds is complex, and a misunderstanding at the time of purchase can cost you tens of thousands in foregone deductions or unexpected tax liabilities when you sell.

Before you exchange contracts, speak to a tax adviser who understands the new residential investment rules and a broker who understands how lenders are interpreting the DTI cap and new-build exemptions for serviceability. Those two conversations will confirm whether the property and loan structure you are considering actually deliver the tax and cash flow outcomes you expect. If you are weighing up rentvesting against buying an owner-occupied property first, those same advisers can model both scenarios using your actual income, deposit and timeline so you can make the decision with full information.

Call one of our team or book an appointment at a time that works for you. We work with legal assistants regularly and can walk you through the loan options, structuring choices and lender policies that apply to your specific situation.

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