Investment Property Tax Deductions Calculator (Australia)

This calculator estimates the total tax deductions you can claim on an Australian investment property and calculates the resulting tax saving based on your marginal tax rate. Enter your income and deduction amounts above to see how much you may save.

What investment property tax deductions can you claim?

The ATO allows property investors to deduct expenses incurred in earning rental income. These deductions reduce your taxable income, which in turn reduces the amount of tax you pay. The tax saving depends on your marginal tax rate — higher-income investors receive a larger dollar saving per dollar of deduction.

Immediately deductible expenses

These expenses are claimed in full in the financial year they are incurred:

• Loan interest — the interest portion of your mortgage repayments (not principal). This is typically the single largest deduction, often $20,000–$40,000 per year depending on the loan size and interest rate.
• Council rates — the rates charged by your local council, typically $1,500–$3,000 per year.
• Water charges — supply charges and usage fees (where the tenant is not liable). Typically $800–$1,500 per year.
• Landlord insurance — building, contents, and landlord-specific cover. Budget $1,200–$2,500 per year.
• Property management fees — agent commissions (typically 5–10% of rent), letting fees, and advertising. If your rent is $500/week and your agent charges 7.5%, that is approximately $1,950/year in management fees alone.
• Repairs and maintenance — restoring items to their original condition. A plumber fixing a leaking pipe, replacing a broken door lock, or repainting a wall to the same standard.
• Body corporate / strata fees — administration fund levies (not capital fund contributions).
• Land tax — the state-based tax on investment property land value.
• Pest control, gardening, cleaning — routine property upkeep costs.
• Tax agent fees — the portion of your accountant’s fee attributable to preparing the rental property schedule.
• Legal expenses — costs related to tenant disputes or lease preparation (not purchase-related legal costs).
• Sundry expenses — stationery, phone calls, postage related to the property.

Non-cash deductions (depreciation)

These deductions do not require any cash outlay — they are based on the declining value of the property and its contents:

• Division 43 capital works — 2.5% of the original construction cost per year for buildings constructed after 15 September 1987. For a property with $300,000 in construction cost, this is $7,500 per year for 40 years.
• Division 40 plant and equipment — items like carpets, blinds, dishwashers, air conditioning units, and hot water systems depreciated over their effective life. For properties acquired after 9 May 2017, only new items installed by the owner are deductible (not previously used items).

To claim depreciation, you typically need a tax depreciation schedule prepared by a qualified quantity surveyor. This usually costs $500–$770 and the schedule covers the remaining depreciable life of the property. The deduction from the schedule typically exceeds the cost of the report in the first year alone.

Worked example: $90,000 salary with a Sydney apartment

Scenario: Sarah earns $90,000 per year and owns a 2-bedroom apartment in Sydney purchased for $650,000 with a $520,000 loan at 6.5% interest.

With $90,000 in salary and $54,413 in deductions:

• Tax without deductions: $20,567 (including Medicare levy)
• Tax with deductions: $9,408
• Annual tax saving: $11,159 ($215/week)
• Marginal rate: 30% + 2% Medicare levy = 32%

The $9,050 in depreciation alone ($6,250 Div 43 + $2,800 Div 40) saves Sarah approximately $2,896 in tax with zero cash outlay.

Expenses you cannot claim

Not all property-related expenses are tax deductible. Common non-deductible items include:

• Loan principal repayments — only interest is deductible
• Purchase costs — stamp duty, conveyancing, and legal fees on purchase are added to the cost base for CGT
• Travel to the property — not deductible for most residential property investors from 1 July 2017
• Capital improvements — new additions (decks, pools, extensions) are not immediately deductible; they are either Division 43 or added to CGT cost base
• Private use costs — if you use the property personally for part of the year, deductions must be apportioned
• Sinking fund / special levies for capital works — body corporate contributions for building improvements

How the tax saving is calculated

The calculator uses the 2025–26 ATO income tax brackets for Australian residents, including the Medicare levy (2%) and Low Income Tax Offset (LITO). The tax saving is the difference between:

1. Tax on salary alone — your normal tax liability without the property
2. Tax on (salary minus deductions) — your reduced tax liability after deductions

This approach reflects how negative gearing works in practice. The deductions reduce your taxable income, not your tax directly. The actual dollar saving depends on which tax bracket the deductions fall into.

Plus 2% Medicare levy on all taxable income above the low-income threshold.

Maximising your deductions over time

The tax benefit from an investment property typically changes over the life of the investment. In the early years, interest expenses are at their highest because the loan balance is large and most of each repayment goes to interest. As you pay down the loan, the interest component shrinks and the principal component grows — so your deduction decreases over time.

Depreciation follows a different pattern. Division 43 capital works deductions remain constant at 2.5% of construction cost per year for up to 40 years. Division 40 plant and equipment deductions are highest in the first few years (when items are newer) and decrease as assets reach the end of their effective life. Together, these non-cash deductions can offset thousands of dollars in tax without any additional spending.

For investors holding multiple properties, tracking deductions across properties and financial years becomes essential. Common pitfalls include claiming principal repayments as interest (only interest is deductible), missing the 5-year spreading rule for borrowing costs, incorrectly claiming second-hand plant and equipment on post-2017 properties, and failing to apportion expenses when the property is partly used for private purposes.

A quantity surveyor’s depreciation schedule typically costs $500–$770 and often pays for itself in the first year through higher deductions. If your property was built after 1987 and you do not yet have a schedule, it is likely you are missing out on significant Division 43 claims.

Go deeper with the full spreadsheet

This calculator estimates deductions for a single year. For multi-year projections, multiple property comparisons, and hold-versus-sell analysis, see our premium property investment spreadsheet. The spreadsheet includes:

• 10-year projection with annual deduction tracking
• Multiple property comparison (up to 5 properties)
• Cash flow analysis including mortgage principal and interest split
• Depreciation schedule tracking over the asset’s effective life
• ATO rental property worksheet format for tax return preparation