Rental property deductions, repairs, depreciation and the rules every landlord needs to know.

Australia has one of the highest rates of property investment in the world. And every year, a significant proportion of property investors either overpay tax by missing legitimate deductions — or create compliance risks by claiming things incorrectly. Both outcomes are avoidable with the right understanding.

The ATO's rental properties guide is the authoritative reference — but it's not always easy reading. This article gives you the plain-English version of what matters most for your 2026 return. Whether you own one property or five, understanding investment property tax Australia rules is the key to getting your position right — and it's where Tax NextGen adds the most value.

1. Rental Property Deductions Most Owners Miss

Most property investors know about mortgage interest, rates, and insurance — the obvious ones. The deductions consistently missed or under-claimed include:

• Borrowing costs: If your loan establishment fees, mortgage stamp duty, and lender's mortgage insurance exceed $100, they're deductible — but spread over the lesser of five years or the loan term, not claimed in full in year one.
• Travel to the property: Since 1 July 2017, investors can no longer claim travel to inspect, collect rent, or maintain a rental property. Many investors still don't know about this change.
• Quantity surveyor fees: The fee paid for a tax depreciation report is itself deductible — a detail many investors overlook.
• Property management costs: Management fees, letting fees, advertising for tenants, and tenant-finding costs are all deductible — easy to miss if you only review an annual summary.
• Pest control, garden maintenance and cleaning: Ongoing maintenance — not just major repairs — is deductible, provided it's incurred while the property is rented or available for rent.
• Legal expenses: Costs of evicting a non-paying tenant, reviewing leases, or obtaining tenancy legal advice are generally deductible.

2. Repairs vs Improvements: The Most Important Distinction

This is the area that creates the most tax issues for property investors — and where we see the most errors in self-prepared returns.

Repairs — immediately deductible. A repair restores something to its original condition without improving or altering it:

• ✓ Fixing a broken window
• ✓ Repairing a damaged roof tile
• ✓ Patching a wall
• ✓ Fixing a leaking pipe

Improvements — capital, not immediately deductible. An improvement makes the property better than it was, beyond restoring the original condition:

• ✗ Installing a new kitchen superior to the original
• ✗ Replacing carpet with timber floorboards
• ✗ Adding a deck or pergola
• ✗ Converting a garage into a room

Improvements are capital expenditure — not immediately deductible, but may be depreciable over time. The grey area is replacement: replacing an old item with a new one of equivalent quality is generally a repair; replacing it with something superior is an improvement. The ATO looks at this closely.

3. Interest Deductibility Explained

Mortgage interest on a loan used to purchase an investment property is deductible — but the relationship between the loan and the property matters:

• Purpose, not security: What the loan was used for determines deductibility — not what property secures it. Borrow against your investment property to fund a holiday, and that interest is not deductible.
• Mixed purpose loans: If a loan is used for both investment and private purposes, you can only claim the investment proportion.
• Redrawing for private purposes: If you repay money into an investment loan and then redraw it for a private purpose, the redrawn amount loses its deductible character. This regularly creates problems.
• Line of credit loans: Where interest accumulates and both investment and private expenses flow through the same account, the deductibility rules can be complex.

4. What Happens When You Move Into Your Rental?

This is a scenario we're seeing increasingly often — investors who decide to move into their rental property, temporarily or permanently. The tax implications depend on what happened and when.

Converting your rental to your main residence

When you move into a previously rented property, it transitions from an investment asset to your main residence. Future capital gains may eventually be exempt under the main residence exemption — but the proportional use rules apply. For example:

• • You bought a property in 2018 and rented it for six years
• • In 2024, you moved in and made it your main residence
• • If you sell in 2026, the rented period (2018–2024) cannot be excluded from CGT — only the main-residence period counts for the full exemption

The 6-year rule

If you originally occupied the property as your main residence and then moved out to rent it, the 6-year rule may allow you to treat it as your main residence for up to 6 years — even while rented. This does not apply if you previously rented the property and then moved in.

Depreciation clawback

When you stop using a property as an investment and start using it privately, certain depreciation that was claimed may need to be considered in your cost base calculations. For the full picture on how the gain is calculated, see our guide on shares, ETFs and capital gains tax. Tax NextGen can guide you through these calculations.

5. Depreciation Reports: Are They Worth It?

A tax depreciation schedule, prepared by a qualified quantity surveyor, details the depreciable assets in your property and calculates the annual deductions available. There are two components:

• Division 40 — Plant and equipment: Appliances, carpets, blinds, air conditioning, hot water systems. Each item depreciates at its own rate over its effective life.
• Division 43 — Capital works: The structural elements — walls, roof, floors. Depreciates at 2.5% per year for buildings constructed after 18 July 1985.

When is a report worth it? Almost always, for properties with deductible depreciation. A report typically costs $500–$800, and the annual deductions it uncovers often range from $3,000 to $10,000 or more. At a 37% marginal rate, $5,000 of additional depreciation deductions saves $1,850 in tax in a single year — so the report usually pays for itself in the first year.

From 1 July 2017, Division 40 changed: for properties purchased after this date, plant and equipment depreciation can only be claimed on assets you directly purchased — not those already in the property when you bought it. Division 43 remains fully deductible regardless of purchase date. We cover this in full in our dedicated guide, rental property depreciation reports — are they worth it?

Disclaimer: Information contained in this publication is general in nature and has been prepared for information purposes only. It does not constitute legal, taxation, or financial advice. Professional advice should be sought before acting on any information contained in this publication.