For Australian non-residents holding rental property back home, borrowing costs sit at the intersection of two rule sets that most generalist accountants treat as separate: ATO deductibility rules and non-resident income tax obligations. The core answer is this: non-residents can claim interest and other borrowing expenses against Australian rental income, but the rules on how and when those costs are deductible differ in meaningful ways from resident treatment, particularly once rates move mid-loan or the loan was established before the non-residency period began. Getting this wrong produces either under-claimed deductions or compliance risk on your non-resident tax return in Australia.
TL;DR: Key Takeaways
- Interest on a loan used to produce non-resident rental income is generally deductible, but the deductibility test tracks the loan’s purpose, not just the property’s ownership.
- When interest rates rise mid-loan, the higher interest payments are deductible in the year incurred, with no special restriction for non-residents.
- Non-resident rental income tax in Australia is assessed at non-resident rates, with no tax-free threshold, making deduction accuracy especially high-stakes.
What Counts as a Deductible Borrowing Expense for a Rental Property?
Borrowing expenses are the costs you incur to establish a loan used to purchase or maintain a rental property. They are distinct from ongoing interest payments, though both can be deductible. The ATO draws a clear line between the two categories because they are claimed differently.
Deductible borrowing expenses typically include:
- Loan establishment fees
- Lender’s mortgage insurance (LMI)
- Title search fees charged by your lender
- Costs of preparing and registering mortgage documents
What you cannot claim as a borrowing expense includes stamp duty on the property transfer itself, or any costs relating to purchasing the property rather than establishing the finance [mfaa.com.au].
The split-claiming rule matters here. If your total borrowing expenses exceed $100, you cannot claim the full amount in year one. Instead, you spread the deduction over five years or the remaining term of the loan, whichever is shorter [mfaa.com.au]. If the expenses are $100 or less, you claim the full amount in the year you incur them.
How Does Interest Deductibility Work for Rental Property When You Are a Non-Resident?
Building on the borrowing expense framework, ongoing loan interest is a separate and generally larger deduction. For non-residents, interest deductibility on a rental property follows the same purpose-of-loan test that applies to residents: if the borrowed money was used to acquire or improve a property that earns rental income, the interest is deductible against that income.
There is no special restriction that strips interest deductibility simply because the borrower has become a non-resident. However, three practical complications arise in the non-resident context:
- No tax-free threshold. Non-residents pay Australian income tax on rental income from the first dollar, at non-resident rates applicable in the 2025-26 financial year. This makes the net deduction from interest claims more valuable, because you are reducing income that would otherwise be taxed at a higher effective rate than a low-income resident would face.
- Negative gearing still applies. If deductible expenses including interest exceed rental income, the resulting loss can offset other Australian-sourced income. Non-residents with no other Australian income will carry the loss forward.
- Withholding on gross rent. There is no withholding on rental income; non-residents declare rent in their annual Australian tax return. Filing a non-resident tax return in Australia allows you to claim deductions, including interest, against gross rent to arrive at your actual taxable position.
When Rates Rise Mid-Loan, How Does That Change the Deductibility Calculation?
A rate rise mid-loan does not change the deductibility test, but it does change the arithmetic in ways that matter for non-resident rental income tax planning. The deductibility of interest is assessed in the year it is incurred. So if your variable rate increases from one financial year to the next, the higher interest payments become deductible in the year you pay them.
The practical effect for non-residents:
| Scenario | Deductibility Treatment |
|---|---|
| Variable rate rises mid-year | Higher interest payments in that financial year are deductible in that year; no apportionment issues |
| Fixed rate expires, moves to higher variable | Interest at the new rate is deductible from the date the new rate applies |
| Loan refinanced to lock in a new rate | New borrowing expenses (if any) restart the five-year spread rule; existing interest continues to be deductible based on loan purpose |
| Redraw used for non-rental purposes | Interest attributable to the redrawn amount used privately is NOT deductible; apportionment required |
The redraw scenario is where non-residents most frequently misclaim. If you redrew funds from your Australian mortgage while overseas and used them for personal spending, the interest on that portion is not deductible, regardless of the property’s rental status. The purpose-of-funds test applies to each dollar of borrowing, not to the property overall.
What If You Also Pay Tax on Rental Income Overseas?
Stepping back from the technical deductibility detail, a separate concern arises for Australian expats whose country of residence also taxes their Australian rental income. This is a real scenario in countries like the UK, USA, Singapore, and Germany, where foreign-sourced income is often assessable locally.
The Foreign Income Tax Offset (FITO) system allows Australian residents and non-residents in certain situations to reduce their Australian tax liability if they have already paid foreign tax on the same income. The key constraint is that the offset cannot exceed the Australian tax payable on that income, and it is only available where a Double Tax Agreement (DTA) or the FITO rules under Australian domestic law create an entitlement.
This means double taxation is generally preventable, but it requires deliberate action. It does not happen automatically on your non-resident tax return in Australia.
Frequently Asked Questions
About ODIN Tax
ODIN Tax is a Registered Australian Tax Agent and the specialist tax arm of ODIN, which also includes Odin Mortgage. The practice works exclusively with Australian expats and non-residents across 40+ countries, preparing Australian tax returns, resolving multi-year overdue lodgments, and providing tax residency and Capital Gains Tax advice for Australians living abroad. With a Tax Director bringing more than 10 years of expat tax experience, and 2,300+ clients served, ODIN Tax has the pattern recognition to handle complex deductibility questions, negative gearing structures, and non-resident rental income tax positions that generalist accountants routinely get wrong. ODIN Tax is headquartered in Hong Kong, where many of its clients live, and holds a 4.9/5 Google rating from more than 400 verified client reviews.
Ready to get your non-resident rental deductions right for 2025-26?
The ODIN Tax team reviews your borrowing expenses, interest claims, and filing obligations so nothing is missed and nothing is overclaimed. Visit odintax.com to get started.
References
- The ATO’s top tips for new rental property owners – MFAA (mfaa.com.au)
