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What is My True Net Cost of Holding an Investment Property?

Published 26 June 2026 · Last updated 26 June 2026

Quick Answer

Calculating the true net cost of holding an investment property involves assessing all associated expenses minus tax deductions and rental income. Key expenses include mortgage interest, insurance, maintenance, and property management fees. Tax deductions, under Divisions 40 and 43 of ITAA 1997, and depreciation can significantly reduce your net cost.

Understanding the true net cost of holding an investment property is crucial for Australian investors aiming to maximise their returns. This involves more than just subtracting expenses from rental income; it requires a thorough understanding of both cash flow and tax implications.

Calculating the True Net Cost of Holding an Investment Property

The net cost of holding an investment property is calculated by evaluating all expenses related to the property and subtracting any tax deductions and rental income. Key expenses include mortgage interest, council rates, insurance, maintenance costs, property management fees, and any strata fees. Depreciation deductions, under Division 40 for plant and equipment and Division 43 for capital works, can significantly offset these costs. The common misconception is that only visible outflows count; in reality, depreciation is a non-cash deduction that can dramatically impact your taxable income.

How This Works in Practice

Consider an investor owning a 2009-built 2-bedroom apartment in Fortitude Valley, Brisbane, purchased for $700,000. The annual rental income is $30,000, while mortgage interest, insurance, and other costs total $35,000. Depreciation deductions (both Divisions 40 and 43) amount to $10,000 annually. Thus, the taxable income from the property is $25,000. At a 37% tax rate, this results in a tax liability of $9,250. After accounting for depreciation, the effective net cost is reduced by $3,700, showcasing the importance of these deductions.

Professional Insight

In our experience, investors often overlook the impact of depreciation schedules, which can transform a negatively geared property into a tax-efficient investment. One thing we frequently see is investors underestimating maintenance and repair costs, which can significantly affect cash flow. What most investors don't realise is the potential savings from refinancing their mortgage to secure a better interest rate. Additionally, failing to adjust rental rates in line with the market can lead to missed income opportunities.

When Does the Answer Change?

The answer changes depending on the property's purchase date and type. For properties acquired after 9 May 2017, you cannot claim Division 40 depreciation on previously used plant and equipment. For properties built before 1987, Division 43 deductions are unavailable unless substantial renovations have occurred. Holding properties in an SMSF may also alter tax implications. Commercial properties often have different depreciation schedules and expense structures compared to residential properties.

When Should You Seek Professional Advice?

You should consult a professional when your investment strategy involves complex property portfolios, when dealing with SMSFs, or if your property has undergone significant renovations. A Chartered Quantity Surveyor can provide a detailed depreciation report, while an accountant can offer advice tailored to your tax situation. This collaboration ensures you're not leaving money on the table.

What to Do Next

  • Compile a list of all expenses related to your property.
  • Obtain a tax depreciation schedule from a Chartered Quantity Surveyor.
  • Review your mortgage terms and consider refinancing for better rates.
  • Adjust rental rates based on current market conditions.
  • Consult with your accountant to optimise your tax deductions.
  • Regularly review your investment strategy in light of any legislative changes.
  • Frequently Asked Questions

    How do I calculate the net cost of my investment property?

    Calculate by adding all expenses (mortgage interest, insurance, etc.) and subtracting rental income and tax deductions like depreciation.

    Can I claim depreciation on an old property?

    Yes, but only if the property has undergone substantial renovations or if it's a new build post-1987 for capital works.

    How does state legislation affect my net cost?

    State laws primarily affect stamp duty and land tax, which vary significantly across Australia, impacting your overall holding costs.

    How are these costs reported in my tax return?

    You report rental income and expenses in your tax return; depreciation is claimed using a depreciation schedule prepared by a Quantity Surveyor.

    What happens if my property is negatively geared?

    If expenses exceed income, the loss can offset other taxable income, reducing your overall tax liability.

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    Written by Koste Team · Koste Chartered Quantity Surveyors · AIQS Member · RICS Member · TPB Registered · 1300 669 400 · info@koste.ai