For many Australians, an investment property is their largest investment outside the family home. It can also be one of the most tax-effective investments you own – but only if you get your tax return right.
The Australian Taxation Office (ATO) continues to keep rental property owners firmly in its sights. In fact, rental property deductions remain one of the ATO's biggest compliance concerns, with its data suggesting that a large proportion of rental property owners make mistakes in their tax returns each year.
The good news is that most errors are entirely avoidable. Recent H&R Block consumer research found that 77% of Australians believe tax is relatively straightforward. Yet almost half have experienced an unexpected tax outcome, highlighting how easy it is to overlook the finer details.
For property investors, where claims can be more complex, understanding what you can claim – and just as importantly, what you can't – can help you maximise your legitimate deductions while avoiding unwanted attention from the tax office.
Here are some of the biggest tax traps facing property investors this tax season.
1. Claiming expenses that relate to private use
Using your holiday rental yourself? You may need to apportion your deductions.
One of the most common mistakes occurs when investors claim expenses in full even though the property wasn't available for rent for the entire year.
If you used the property yourself, allowed family or friends to stay at below-market rates, or deliberately kept the property off the rental market for extended periods, you generally need to apportion your deductions.
For example, if you own a beach house that you rent out during summer but use yourself over Christmas and Easter, you can't simply claim 100% of your annual interest, insurance, council rates and other holding costs.
The same principle applies if you allow relatives to occupy the property for little or no rent. The deductions must generally be reduced to reflect the private use.
2. Not genuinely making the property available for rent
Simply advertising a property for rent does not automatically entitle you to claim deductions.
The ATO looks closely at whether a property was genuinely available for rent throughout the year.
Red flags include:
- Advertising the property at well above market rent
- Rejecting suitable tenants without good reason
- Making the property unavailable during peak holiday periods
- Limiting availability to suit your own lifestyle
- Advertising only through restricted channels where genuine tenants are unlikely to see the listing.
If the property isn't genuinely available for rent, deductions may be denied for those periods.
Holiday homes receive particular scrutiny because they are often used partly for personal purposes.
See also: Tax on holiday homes and Airbnb in Australia
3. Confusing repairs with improvements
This mistake costs investors every year.
Repairs are generally deductible immediately if they restore something that has become worn or damaged while the property was earning rental income.
Examples include replacing broken roof tiles after a storm, repairing damaged gutters or fixing a leaking tap.
However, improvements are different.
Replacing an old laminate kitchen with a modern designer kitchen, installing stone benchtops, adding a deck or converting a garage into another bedroom generally improves the property's value rather than simply restoring it.
These costs usually need to be claimed over time through capital works deductions or depreciation rather than as an immediate deduction.
See also: Tax rules for renovating, flipping and developing property in Australia
Similarly, if you purchase a property with existing defects and repair them shortly after settlement, those costs are usually considered "initial repairs" and are not immediately deductible because the defects existed when you acquired the property.
4. Forgetting depreciation deductions
Many investors miss legitimate deductions simply because they never obtain a depreciation schedule.
Depreciation covers eligible plant and equipment assets, while capital works deductions may be available for qualifying construction expenditure.
Although depreciation on previously used residential plant and equipment is now restricted for many investors, owners of newly built properties or those who purchase brand-new assets can still be entitled to substantial deductions.
A professionally prepared depreciation schedule often pays for itself many times over.
5. Claiming borrowing costs incorrectly
Do you know which borrowing costs cannot be claimed in full upfront?
Borrowing expenses are often misunderstood. Loan establishment fees, mortgage registration fees, lender's legal fees and certain other borrowing costs generally cannot be claimed in full upfront.
Instead, they are usually claimed over five years or over the life of the loan if the loan term is shorter.
On the other hand, interest charged on the investment loan is generally deductible provided the borrowed funds were used to produce rental income.
Keeping clear records of how borrowed money has been used is essential, particularly if redraw facilities or offset accounts are involved.
6. Mixing private and investment borrowing
Many investors use redraw facilities without appreciating the tax consequences.
The deductibility of interest depends on how the borrowed money is actually used, not what property secures the loan.
For example, if you redraw $50,000 from your investment property loan to buy a new family car or fund a holiday, the interest relating to that portion of the loan generally becomes non-deductible.
Similarly, refinancing can become complicated if private and investment borrowings are mixed together.
Maintaining separate loan accounts for private and investment purposes can save considerable headaches later.
7. Forgetting to declare all rental income
The ATO receives information from property managers, banks, sharing economy platforms and numerous other data sources.
Rental income includes more than just weekly rent. It may also include:
- Booking cancellation fees
- Insurance payouts for lost rent
- Reimbursements from tenants
- Short-term accommodation income
- Bond money retained for damage or unpaid rent
Failing to declare these amounts can trigger ATO review activity.
8. Incorrectly claiming travel expenses
Some investors are surprised to learn that travel expenses relating to residential rental properties are generally no longer deductible.
For most individual investors, travel undertaken to inspect, maintain or collect rent from a residential investment property cannot be claimed.
Limited exceptions apply in certain circumstances, including some corporate taxpayers and businesses carrying on a genuine property rental business, but most individual landlords cannot claim these costs.
9. Poor record keeping
Good record keeping is one of the simplest ways to avoid tax problems.
Investors should retain records of:
- Settlement statements
- Loan documents
- Invoices and receipts
- Depreciation schedules
- Council and water rates
- Insurance policies
- Property management statements
- Tenancy agreements
- Bank loan statements
These records not only support current-year deductions but may also prove critical years later when calculating capital gains tax after the property is eventually sold.
Missing records can result in higher capital gains tax simply because you cannot substantiate costs that would otherwise increase your cost base.
10. Assuming your accountant already knows
Your accountant can only work with the information you provide.
If you replaced appliances, refinanced your loan, undertook renovations, received insurance payouts, used the property privately or changed property managers during the year, make sure your tax adviser knows.
Small details often have important tax consequences.
Getting your property tax return right
Property investment remains one of Australia's most popular wealth-building strategies, and the tax system continues to provide valuable deductions for genuine investment expenses.
However, the ATO's sophisticated data matching means mistakes are becoming easier to detect than ever before. Rental property claims are routinely cross-checked against information received from banks, state revenue offices, property managers, online booking platforms and other third parties.
Rather than trying to maximise deductions at all costs, investors should focus on claiming everything they are legally entitled to, no more and no less.
A well-prepared tax return is about accuracy, not creativity.
With proper records, a good understanding of the rules and professional advice where needed, property investors can confidently claim their legitimate deductions while reducing the risk of costly adjustments, penalties or interest later on.
As H&R Block's tax experts see every year, many of the most common mistakes are entirely preventable with a little planning, good record keeping and an understanding of the rules.
After all, the best tax outcome isn't achieved by making aggressive claims; it's achieved by getting your return right the first time.
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