Property investment income is taxed aggressively in Australia. But the ATO allows substantial deductions that most landlords leave on the table. The difference between claiming basic deductions and maximizing them can be $3,000–$8,000+ per year in tax savings.
This guide shows you exactly which expenses you can claim, how to document them, and strategies to legally minimize your tax liability as a property owner.
The Core Rule: What's Deductible?
The ATO allows deductions for expenses that are:
- Incurred in earning rental income (not private use)
- Not capital expenses (capital = buying/building; deductible = maintaining/repairing)
- Supported by receipts (always get a receipt)
Category 1: Mortgage Interest (The Biggest Deduction)
Interest on investment property loans is often tax deductible, depending on how the loan is used.
Example: $600k loan at 6.0% = $36,000/year in interest. If all of it were deductible, at a 30% marginal rate that could reduce your tax by about $10,800 in this simple example only.
Pro tip: Keep your loan separate from your owner-occupied home loan. If you mix them, only the investment portion is deductible.
Category 2: Depreciation (The Hidden Goldmine)
Most property owners don't claim depreciation. Big mistake.
What it is: Buildings and fittings lose value over time. The ATO lets you claim this depreciation as a tax deduction, even though you're not spending money.
- Building depreciation: 2.5% per year on the building value. $500k building = $12,500/year deduction.
- Plant & fittings: Faster depreciation (5–10%). Carpets, air conditioning, kitchen appliances, etc.
How to claim: Get a depreciation schedule from a quantity surveyor (~$400–$600). They itemize what's depreciable and calculate the annual deduction. It is a one-off cost that may help you claim deductions over several years, depending on your property.
Category 3: Repairs & Maintenance
Fully deductible, but only repairs—not improvements.
- ✅ Deductible: Fixing a leaky roof, repainting walls, replacing broken windows, fixing plumbing
- ✗ Not deductible: Installing a new roof (capital), building an extension, upgrading kitchen
Gray area: If you repair + improve in one project, only the repair portion is deductible. Example: Replace old kitchen ($15k total) = Maybe $3k deductible repair + $12k capital improvement.
Category 4: Management & Advertising
Fully deductible:
- Property management fees (if you use an agent)
- Advertising for tenants (rental listings)
- Tenant screening & background checks
- Legal fees for lease disputes or evictions
- Real estate agent commissions (if applicable)
Category 5: Utilities & Services
If you pay for the property (not the tenant):
- Council rates & water usage (owner-paid portion)
- Strata fees (body corporate)
- Insurance (landlord/building insurance)
- Electricity/gas (if owner-paid, e.g. common areas in apartments)
Category 6: Loan Fees & Refinancing Costs
Mostly deductible:
- ✅ Loan origination fees (can be deducted over loan term or immediately, depending on ATO guidance)
- ✅ Refinancing costs (same as above)
- ✗ Loan principal repayment (NOT deductible; it's return of capital)
Category 7: Professional Fees
Deductible:
- Accountant fees (tax prep for rental income)
- Quantity surveyor depreciation report
- Mortgage broker fees (for investment property refinancing)
- Legal fees (lease disputes, evictions)
Worked Example: How Deductions May Reduce Tax
Scenario: You own a $600k rental property, earn $36,000/year in rent.
| Expense Type | Annual Amount |
|---|---|
| Mortgage interest (6.0% on $600k) | $36,000 |
| Depreciation (building 2.5% + plant 5%) | $8,000 |
| Property management (7% of rent) | $2,520 |
| Repairs & maintenance | $1,500 |
| Insurance, rates, strata | $3,000 |
| Accountant & misc fees | $800 |
| TOTAL DEDUCTIONS | $51,820 |
Example only. Figures are illustrative and not a quote; actual repayments and costs depend on your lender and loan.
Result: You earned $36,000 in rent. Deductions: $51,820. You have a **loss of $15,820** that offsets other income.
At a 40% marginal tax rate, a loss like this could reduce your tax by about $6,328 in this example. Your own result depends on your circumstances, so speak to a registered tax professional.
Critical: Keep Documentation
The ATO can audit you up to 5 years later. Always keep:
- Receipts for all repairs, maintenance, professional fees
- Bank statements showing loan interest payments
- Insurance policies & payment receipts
- Depreciation schedule from your surveyor
- Property management statements
- Council rate notices
Store digitally (photos of receipts) or keep originals for 5 years.