Picture this: a landlord finishes their tax return in under an hour, copies the total from their property manager’s annual statement into myTax, and hits lodge. Done. What they don’t realise is that they’ve potentially missed deductions that can amount to thousands for some taxpayers, and may have declared less income than the ATO expects to see. A rental property tax return in Australia can be more detailed than many other individual returns, because apportionment, depreciation, and capital works rules all interact in ways that aren’t obvious to the untrained eye. The gap between “I entered the rent” and “I entered everything correctly” is where many landlords underclaim or misclassify deductions, reducing their tax outcomes.

This guide walks through exactly what rental income you must declare, which expenses you can claim and how to apportion them, how depreciation and capital works fit in, and how to navigate the Rent section in myTax. It also covers the records the ATO expects you to hold and the mistakes that most commonly trigger an ATO review or leave money on the table. This is the same process Tax NextGen’s CPAs work through with investment property clients every tax season, the key difference being a trained eye that consistently catches what self-lodgers miss.

What rental income you must declare (and what most landlords forget)

The ATO requires you to declare all rental income you receive or become entitled to during the financial year. That means gross rent, not the amount that lands in your bank account after your property manager takes their cut. Any amounts your agent receives on your behalf count as your income in the year the tenant pays them, regardless of when those funds actually transfer to you.

Beyond standard rent, there are several income types that routinely get omitted. Bond money you retain in place of unpaid rent or to cover damage is assessable income. So are insurance payouts for lost rent, cancellation fees you keep, and reimbursements for expenses you’ve previously claimed as deductions. Short-term letting income from platforms like Airbnb is fully assessable; it receives no special exemption simply because it flows through an app rather than a traditional tenancy agreement.

If you own the property with another person, each co-owner must declare their proportionate legal share of both income and expenses. You cannot negotiate a different split to produce a better tax outcome for either party. ATO data-matching and property records can prompt review where a declared split doesn’t align with the title, so it’s an area worth getting right from the outset.

Negative gearing, net losses, and your rental property tax return

Negative gearing applies when your rental expenses, including interest, depreciation, and other deductible costs, exceed your rental income for the year. The resulting net rental loss can generally be offset against your other assessable income, such as salary or wages, reducing your overall tax liability. This interaction between rental property deductions and personal income is one of the main reasons that completing a rental property tax return in Australia accurately matters so much: understating deductions or miscalculating apportionment directly affects the size of the offset you’re entitled to claim.

Which rental expenses you can claim and how to apportion them

The core list of deductible rental expenses covers most of the regular costs of owning and managing a rental property. Loan interest on the investment portion of your mortgage, property management fees, council rates, land tax, water rates, and body corporate fees are all generally deductible. So are insurance premiums, cleaning, gardening, pest control, advertising for tenants, and accounting fees directly related to your rental return. These costs are claimable in full when they relate solely to the rental use of the property in the relevant income year.

One distinction that catches many landlords out is the difference between repairs and capital improvements. A repair restores something to its former condition: fixing a broken hot water system, patching a leaking roof, or replacing damaged floorboards. A capital improvement adds value or creates something new: building a deck, adding a second bathroom, or installing a new kitchen where there wasn’t one before. Repairs are deductible in the year you pay for them. Capital improvements are not immediately deductible and must instead be claimed as capital works over time. Misclassifying a capital improvement as a repair is one of the more common triggers for ATO review of investment property returns.

When a property was rented for only part of the year, or when you used it personally during the year, you must apportion expenses so you only claim the rental-use portion. Time-based apportionment divides the days the property was genuinely available for rent by the total days in the year. Area-based apportionment applies when only part of the property earns rent. Claiming 100% of expenses on a property that sat vacant for six weeks over summer, or that you occupied personally during school holidays, can prompt ATO review, apportionment is an area the ATO’s data-matching systems actively cross-reference.

Rental property tax return Australia: depreciation and capital works

Capital works deductions under Division 43 apply to residential buildings constructed after 15 September 1987. You can claim 2.5% of the original construction cost each year, for up to 40 years from the date of construction. The critical word is construction cost, not purchase price. If you paid $800,000 for a property that cost $300,000 to build, your annual Division 43 deduction is based on $300,000, giving you $7,500 per year. Many self-lodgers either skip this deduction entirely because they don’t know it exists, or guess the construction cost with no supporting documentation.

Division 40, decline in value of depreciating assets

Decline in value deductions under Division 40 cover depreciating assets within the property: appliances, carpets, hot water systems, air conditioning units, blinds, and similar items. These are claimed separately using either the diminishing value or prime cost method, based on each asset’s ATO-prescribed effective life. A 2017 rule change restricts depreciation claims on second-hand assets in established residential properties purchased after 9 May 2017, so the assets you can claim under Division 40 depend partly on when and how you acquired the property.

Why a quantity surveyor’s depreciation schedule matters

The most accurate and defensible way to claim both categories is with a formal tax depreciation schedule prepared by a qualified quantity surveyor. A proper schedule separates Division 43 and Division 40 items, documents the construction cost and individual asset values, and gives your accountant, or you, if self-lodging, the exact figures to enter in your return. This is the document that most self-lodgers either don’t have or don’t know to obtain. In our experience reviewing investment property returns for the first time, the absence of a depreciation schedule is a common finding, and depreciation schedules frequently identify deductions that materially increase refunds.

How to complete your rental property tax return in myTax

To enter your rental property in myTax, navigate to the Rent banner in your return. Review any pre-filled property information already populated from third-party data, but do not simply accept it without checking. Agent summaries and pre-filled data can be incomplete or slightly misaligned with your own records, accepting figures without verification is a common way errors carry through to a lodged return, potentially triggering a review or resulting in an amended assessment.

For each property, you’ll complete two income fields. The first is total rental income, which is the gross rent received during the year. The second is total other rental-related income, which captures insurance payouts, retained bond money, short-term letting income, and similar amounts. This second field is the one most commonly left blank, and it’s exactly what the ATO’s data-matching programme checks against third-party reporting from real estate agents and rental platforms. In the expenses fields, enter each cost already adjusted for any necessary apportionment. myTax does not perform the apportionment calculation for you.

The most frequent errors in this section follow a consistent pattern: entering net rent instead of gross rent, leaving the other rental-related income field empty, entering unapportioned expenses for a property with a private-use period, and failing to add every property to the return. Each of these either understates income or overclaims expenses, both of which the ATO’s systems are actively looking for.

Records you must keep and for how long

The ATO requires you to keep records of all rental income and expenses for five years from the date you lodge your return, or from 31 October if you lodge by that date. This covers agent statements, lease agreements, receipts, invoices, bank statements, loan documents, council rate notices, insurance schedules, and any records of bond money or insurance payouts received. If you claim decline in value for a depreciating asset, keep the relevant records for five years from the date of your last claim for that asset.

Records related to buying, owning, and eventually selling the property need to be kept for at least five years after you dispose of it. This is because the cost base for capital gains tax purposes depends on your original purchase records, the cost of capital improvements made during ownership, and associated acquisition expenses. If your property predates 1987 and you have no construction cost records, document whatever you do have. It directly affects your eligibility for Division 43 deductions.

Common mistakes that cost landlords money, and when a tax agent earns their fee

The errors that appear most consistently on investment property returns follow a recognisable pattern. Omitting short-term letting income is common among landlords who treat Airbnb revenue as somehow separate from their “real” rental income. Claiming 100% of expenses on a property used privately during the year costs the landlord nothing upfront but creates significant exposure if the ATO reviews the return. Missing the capital works deduction entirely is surprisingly frequent, particularly among landlords who have owned the same property for years without ever obtaining a depreciation schedule.

Other recurring mistakes include misclassifying capital improvements as repairs and deductible maintenance, and entering the total loan repayment amount instead of just the interest component. These errors cut both ways: underclaiming costs the landlord real money, while overclaiming invites an audit and the prospect of penalties, interest charges, and amended assessments that can easily exceed what was saved. The ATO’s penalty framework for false or misleading statements starts at 25% of the tax shortfall for careless behaviour and rises to 75% for intentional disregard, and that’s before the general interest charge is added to unpaid amounts.

When a Tax NextGen CPA reviews an investment property return, a common finding is that the client had no depreciation schedule in place and was missing Division 43 and Division 40 deductions they were legally entitled to claim.

Beyond that, repair and maintenance categorisation, borrowing expense treatment, and apportionment calculations are the areas where a trained eye regularly identifies deductions that self-lodgers either overlook or calculate incorrectly. For landlords with multiple properties, short-term letting income, mixed private and rental use, or no depreciation schedule, a CPA-reviewed return can be a practical way to make sure nothing is missed.

Getting your rental property tax return right

Getting your rental property tax return in Australia right comes down to a handful of consistent principles: declare all rental income, including the amounts people routinely forget; claim only the properly apportioned expenses; use a depreciation schedule to capture both Division 43 and Division 40 deductions; and maintain your records for the required periods. myTax can handle a rental property return, but the accuracy of the outcome depends entirely on what you enter into it.

For landlords with straightforward situations, a careful read of this guide and the ATO’s own rental property guidance will get you a long way. For those with multiple properties, short-term letting income, mixed-use situations, or no depreciation schedule in place, the cost of getting it wrong or leaving deductions unclaimed tends to exceed the cost of having it done properly by someone who does this every day.

If you’d like to find out whether a CPA review of your rental property tax return makes sense for your situation, book a free initial consultation with Tax NextGen. The process is conducted entirely by phone, no office visits required, and our team works to lodge returns promptly once your information is in hand.