Proven Tips to Maximise Tax Deductions on Investment Loans

The Tax Landscape Has Changed for Property Investors

If you're considering an investment property in Mayfield, the way you structure your loan now determines how much tax you'll pay for decades. The Federal Budget handed down in May 2026 introduced two major changes: a 30% minimum tax on capital gains from 1 July 2027, and restrictions on negative gearing for established residential properties purchased after 12 May 2026. If you bought before Budget night, your existing arrangements are largely protected. If you're buying now, you need to structure the loan with these changes in mind.

What Still Qualifies as a Tax Deduction on an Investment Loan

You can still claim the interest charged on your investment loan as a deduction against rental income. This applies whether you choose a variable rate, fixed rate, or split loan structure. Other deductible expenses include property management fees, landlord insurance, council and water rates, repairs and maintenance, depreciation on fixtures and fittings, and body corporate fees if you're buying a unit. The key change is that from 1 July 2027, losses on established properties purchased after Budget night can only be offset against rental income or capital gains from residential property, not against your wages or other income.

How Loan Structure Affects Your Claimable Expenses

The way you set up your investment loan determines what you can claim. If you mix personal funds with borrowed funds in the same loan account, the ATO will reduce your deduction proportionally. Consider a buyer in Mayfield who refinances their owner-occupied home to pull out equity for an investment property deposit. If they don't split that loan into two separate accounts, one for the home and one for the investment, they'll lose the ability to claim interest on the investment portion. The solution is to establish a standalone loan for the investment property from the outset, keeping all borrowings for that property in a separate facility. This creates a clear link between the debt and the income-producing asset, which is what the ATO requires.

Interest-Only Loans and Tax Efficiency

An interest-only loan reduces your monthly repayments because you're not paying down the principal. This structure maximises your tax deduction in the early years because the loan balance stays higher, which means more interest is charged and more interest is claimable. For a property investor in Mayfield buying near the median unit price, choosing interest-only repayments for the first five years can improve monthly cash flow by several hundred dollars compared to principal and interest. That difference can be redirected into paying down non-deductible debt like your home loan, or held as a buffer for vacancy periods. Once the interest-only period ends, you can usually extend it or switch to principal and interest depending on your strategy at the time.

Negative Gearing Under the New Rules

Negative gearing means your property costs more to hold than it earns in rent, and you claim that loss as a deduction. From 1 July 2027, if you buy an established residential property in Mayfield after 12 May 2026, those losses can only be offset against rental income or capital gains from residential property. They can't reduce your taxable salary. Losses that exceed your rental income can be carried forward to future years and used when you sell the property or when your rental income increases. This doesn't eliminate the tax benefit, but it delays it. If you're buying a new build or off-the-plan property, the existing negative gearing rules still apply in full, which is one reason new builds are being incentivised under the current policy settings.

The Capital Gains Tax Changes and What They Mean for Mayfield Investors

From 1 July 2027, the 50% CGT discount is replaced with cost base indexation, which adjusts your purchase price for inflation, plus a 30% minimum tax on the gain. If you bought an established property in Mayfield before Budget night, gains accrued up to 1 July 2027 are still eligible for the 50% discount. Gains after that date fall under the new rules. If you're buying a new build, you can choose between the old 50% discount or the new indexation method when you sell, whichever gives you the lower tax bill. The main residence exemption is unchanged, so if you later move into the property, you may be able to reduce or eliminate CGT depending on how long you live there.

Refinancing to Unlock Equity and Protect Deductibility

If you already own a property in Mayfield or elsewhere and want to use the equity to fund your next purchase, how you structure the refinance matters. Releasing equity by increasing your home loan and transferring the funds into your offset account will not make that interest deductible. The link between the borrowed funds and the income-producing asset must be direct. The correct approach is to establish a separate split or sub-account within your loan structure, draw down the funds for the deposit and costs, and ensure those funds go directly toward purchasing the investment property. This preserves the deduction and keeps your records clear for the ATO.

Choosing Between Variable and Fixed Rates for Tax Purposes

Your loan's interest rate structure doesn't change what you can claim, but it does affect how predictable your deduction will be. A variable rate means your interest charges move with the market, so your deduction will vary each year. A fixed rate locks in your repayments and your deduction for the fixed period, which can help with budgeting and tax planning. Some investors split their loan between fixed and variable to get both certainty and flexibility. The tax treatment is identical regardless of which structure you choose, so the decision comes down to your risk tolerance and cash flow needs.

Depreciation and Non-Loan Deductions You Shouldn't Miss

Beyond the loan interest, you can claim depreciation on the building itself and on fixtures like ovens, blinds, and air conditioning units. For established properties in Mayfield, building depreciation is only available if the property was built after 1987. Plant and equipment depreciation was restricted for second-hand assets purchased after May 2017, but if you're buying new or off-the-plan, both categories apply in full. A quantity surveyor's depreciation schedule costs around $600 to $800 and typically uncovers deductions worth several thousand dollars per year. This is separate from your loan structure but works alongside your interest deductions to reduce taxable income.

What to Do Before You Sign the Loan Documents

Speak to your accountant or tax adviser before finalising your loan structure. They'll confirm whether interest-only or principal and interest suits your tax position, whether you should split the loan, and how to document the purpose of the borrowed funds. Get your investment loan application in order early so you're not rushing the structure decisions at settlement. The loan amount, deposit size, and repayment type all feed into your tax outcome, and changing the structure after settlement is often harder and more costly than getting it right the first time. If you're using equity from another property, make sure the drawdown is documented correctly and the funds are traceable to the investment purchase.

If you're buying an investment property in Mayfield and want to structure the loan to maximise your deductions and protect your position under the new tax rules, call one of our team or book an appointment at a time that works for you.

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