The way you structure your home loan determines what you can claim at tax time.
If you own an investment property or plan to convert your home into one later, the loan structure you choose now affects your deductions for years. Most people set up their loan based on what feels convenient today, then discover they've locked themselves out of thousands in legitimate tax benefits when their circumstances change.
How Loan Structure Affects Tax Deductions
Only the interest on borrowings used to purchase or improve an income-producing property is tax deductible. If you use a loan to buy your home in Quinns Rocks and live in it, the interest isn't deductible. If you later rent that property out and move elsewhere, the interest on the original loan amount becomes deductible from that point forward.
The problem shows up when you've been making extra repayments into a standard variable loan with a redraw facility. Consider someone who bought a property for $450,000 with a $400,000 loan, then made $50,000 in extra repayments over five years. The loan balance is now $350,000. When they convert the property to an investment, only the interest on $350,000 is deductible, not the original $400,000. The ATO treats redrawn funds based on what you use them for, not what the original loan was for. If you redraw $30,000 to buy a car, that portion is no longer deductible even though the property remains an investment.
An offset account works differently. The loan balance stays at the full amount while your savings sit separately and reduce the interest charged. If the same buyer had put that $50,000 into an offset instead of making extra repayments, the loan balance would still be $400,000 when converted to an investment, and the full interest amount would be deductible. The offset funds can be withdrawn for any purpose without affecting the deductibility of the loan.
Interest-Only Loans for Investment Properties
An interest-only loan keeps your repayments lower and maximises your annual tax deduction. You're only paying the interest portion, so the loan balance doesn't reduce during the interest-only period, and the full interest amount remains deductible.
Most lenders offer interest-only terms of one to five years on investment loans, after which the loan reverts to principal and interest unless you request an extension. The appeal for investors is cashflow. If you're holding a property in Quinns Rocks for capital growth rather than immediate equity build-up, paying only interest frees up cash each month that can go toward other investments, renovations, or holding costs.
The downside is you're not reducing the debt. After five years on interest-only, you still owe the original amount, and when the loan switches to principal and interest, your repayments jump because you're now repaying the full loan over a shorter remaining term. Some investors extend the interest-only period if their lender allows it, but this depends on serviceability and loan-to-value ratio at the time of the request.
Interest-only suits investors with a clear strategy for either selling before the principal and interest period starts, refinancing to access equity, or absorbing the higher repayments when they begin. It doesn't suit someone who needs to reduce debt steadily or who's relying on forced equity build-up to improve their position.
Splitting Your Loan Between Owner-Occupied and Investment
When you own both your home and an investment property, keeping the loans separate makes tax time straightforward. If you're living in Quinns Rocks and buying an investment property elsewhere, the investment loan interest is fully deductible and the home loan interest isn't.
Complications arise when you're converting your current home into an investment and buying a new place to live in. In that scenario, you'll have two loans: one secured against the old property (now an investment) and one for the new home. Only the interest on the loan tied to the investment property is deductible, even though both properties might be mortgaged.
Some buyers try to refinance everything into one loan when they move. That creates a blended loan where part of the balance is deductible and part isn't, and tracking the split over time becomes difficult if you make extra repayments or redraw funds. The ATO requires you to demonstrate the purpose of each dollar borrowed, and a single mixed-use loan makes that much harder to defend.
The cleaner approach is to maintain separate loan accounts from the start. If you're planning to keep your Quinns Rocks property as an investment after upgrading, speak to a broker before you refinance or top up your loan. We regularly see people unintentionally muddy their loan structure in a way that costs them thousands in deductions they can't recover.
Claiming Loan Costs and Fees as Deductions
Borrowing costs on an investment loan are deductible, but the way you claim them depends on the term of the loan. Loan establishment fees, valuation fees, mortgage broker fees, legal costs, and lender's mortgage insurance can all be claimed if the loan is used to purchase or improve an income-producing property.
If the loan term is five years or less, you can claim the full amount of these costs in the financial year you incur them. If the term is longer than five years, the costs must be spread evenly over five years or the life of the loan, whichever is shorter. If you refinance or pay out the loan early, you can claim the remaining balance of those costs in the year the loan ends.
Interest charged on the loan is claimed in the year it's incurred, not when you pay it. If you're charged interest in June but don't make the repayment until July, you still claim that interest in the June financial year. This matters if you're trying to maximise deductions in a particular year.
Ongoing fees like annual package fees, monthly account fees, and offset account fees are fully deductible in the year you pay them, provided the loan is for investment purposes. Keep records of every fee, because the ATO will expect you to itemise them if your return is reviewed.
Using Equity Without Losing Deductibility
When your property increases in value, you can borrow against that equity without selling. The key is what you use the borrowed funds for. If you access equity from your Quinns Rocks home to buy an investment property, the interest on that increased borrowing is deductible because the funds are used for investment purposes, even though the loan is secured against your owner-occupied home.
As an example, someone owns a home worth $600,000 with a $300,000 loan. They access $80,000 in equity to use as a deposit on an investment property. The home loan is now $380,000, but only the interest on the original $300,000 is non-deductible. The interest on the $80,000 portion is deductible because it's being used to purchase an investment. To keep this clean, the $80,000 should be split into a separate loan account, not just added to the existing home loan balance.
If you don't split the loan, you'll have a single $380,000 loan where part is deductible and part isn't, and every repayment you make will be apportioned across both. That makes tracking deductions complicated and increases the risk of errors. Lenders can set up split loans at the time you access equity, and it's worth insisting on this structure even if it means an extra account fee.
The same principle applies if you access equity for renovations. If you're renovating your home, the interest isn't deductible. If you're renovating an investment property, it is. The loan security doesn't determine deductibility—the use of funds does.
Refinancing and Preserving Your Deductions
When you refinance an investment loan, the interest on the new loan remains deductible as long as the borrowed amount doesn't exceed the outstanding balance of the original loan used to purchase the property. If you increase the loan amount during refinancing and use the extra funds for private purposes, that portion loses its deductibility.
Some investors refinance to access equity for renovations or further property purchases. If the additional borrowing is used to improve the investment property or buy another income-producing asset, the interest stays deductible. If it's used for a holiday, car, or paying down non-deductible debt, it doesn't.
Refinancing also resets your borrowing costs. Discharge fees from your old lender and establishment fees with the new lender are deductible under the same rules as the original loan costs—spread over five years if the loan term is longer than five years, or claimed in full if it's shorter.
If you've been on a fixed rate and break the loan early to refinance, break costs are deductible in the year you incur them, provided the loan is for investment purposes. Those break costs can run into thousands depending on how much rates have moved, so the deduction provides some offset.
Call one of our team or book an appointment at a time that works for you. We'll walk through your current loan structure, where you're planning to go, and how to set things up so you're not leaving deductions on the table or creating problems you'll need to untangle later.
Frequently Asked Questions
Can I claim interest on my home loan if I live in the property?
No, interest on a loan for your own home is not tax deductible. Once you rent the property out and it becomes an investment, the interest on the original loan balance becomes deductible from that point forward.
What's the difference between a redraw facility and an offset account for tax purposes?
Extra repayments into a redraw reduce your loan balance, which lowers your future tax deductions if you convert to an investment property. An offset keeps the loan balance unchanged while reducing interest, preserving the full deduction if the property becomes an investment.
Are loan establishment fees tax deductible on an investment property?
Yes, borrowing costs including establishment fees, valuation fees, and lender's mortgage insurance are deductible. If the loan term is over five years, these costs must be spread evenly over five years or the life of the loan, whichever is shorter.
Can I claim interest on equity borrowed from my home to buy an investment property?
Yes, if you borrow against your home to fund an investment property purchase, the interest on that borrowing is deductible. The loan should be split into separate accounts to keep the deductible and non-deductible portions clearly separated.
Does refinancing affect my tax deductions on an investment loan?
Refinancing doesn't affect deductibility as long as the new loan amount doesn't exceed the original investment loan balance. If you increase the loan and use the extra funds for private purposes, that portion is not deductible.
