Koste Chartered Quantity Surveyors 1300 669 400  |  info@koste.ai

Commercial Property · Koste Knowledge Base

Understanding Depreciation for Commercial Property in Australia

Published 26 June 2026 · Last updated 26 June 2026

Quick Answer

Depreciation for commercial property in Australia involves claiming deductions for the decline in value of the building (Division 43) and plant and equipment (Division 40). Investors can significantly reduce taxable income by claiming these deductions. A Chartered Quantity Surveyor can help accurately assess these values and ensure compliance with ATO guidelines.

Depreciation is a vital tool for commercial property owners in Australia, allowing them to claim tax deductions for the wear and tear of their properties. Understanding how to apply these rules can result in substantial tax savings, particularly for high-value properties.

How Depreciation Works for Commercial Property

Commercial property owners can claim depreciation under two main categories: Division 43 for capital works and Division 40 for plant and equipment. Division 43 allows deductions for the structural elements of a building, such as walls and roofs, typically at a rate of 2.5% per annum over 40 years. Division 40 covers depreciating assets like air conditioning systems, lifts, and other equipment, with deduction rates depending on the effective life of the asset as determined by ATO guidelines.

A common misconception is that only new properties are eligible for depreciation. In reality, both new and existing commercial properties can benefit, though the deductions will vary based on the property's age and the specific assets involved.

How This Works in Practice

Consider a 2015-built office building in Melbourne with a purchase price of $2 million. Assuming the building structure accounts for $1.5 million and plant and equipment for $500,000, the owner can claim Division 43 deductions of $37,500 annually. For Division 40, if the plant and equipment have an average effective life of 10 years, the first-year deduction could be $50,000. At a 30% corporate tax rate, this results in a tax saving of $26,250 in the first year alone.

Professional Insight

In our experience, many commercial property investors overlook the importance of regularly updating their depreciation schedules, especially after renovations or upgrades. One thing we frequently see is owners underestimating the value of plant and equipment, missing out on potential deductions. What most investors don't realise is that engaging a Chartered Quantity Surveyor can uncover additional deductions that might not be apparent at first glance. Furthermore, properties with mixed-use (commercial and residential) require careful allocation of costs to maximise deductions.

When Does the Answer Change?

  • Properties Built Before 1985: Division 43 deductions are generally unavailable for properties built before this date unless substantial renovations have been done.
  • Mixed-Use Properties: When a property serves both commercial and residential purposes, depreciation claims must be carefully allocated.
  • Post-2017 Acquisitions: The 2017 budget changes primarily affected residential properties, but investors should still review the impact on mixed-use properties.
  • Partial-Year Ownership: If you purchase or sell a property partway through the year, depreciation must be prorated.
  • When Should You Seek Professional Advice?

    Depreciation involves complex calculations that vary significantly with each property’s unique characteristics. A Chartered Quantity Surveyor can provide a detailed depreciation schedule tailored to your property, ensuring compliance with ATO rules. It's also crucial to consult with your accountant to integrate these deductions effectively into your overall tax strategy.

    What to Do Next

  • Engage a Chartered Quantity Surveyor to assess your property's depreciation potential.
  • Review and update depreciation schedules regularly, especially after renovations.
  • Consult with your accountant to ensure depreciation aligns with your tax strategy.
  • Keep detailed records of all property-related expenditures.
  • Consider the impact of future renovations on your depreciation claims.
  • Stay informed on legislative changes affecting commercial property depreciation.
  • Frequently Asked Questions

    Can I claim depreciation on a commercial property purchased before 1985?

    You can claim Division 40 on plant and equipment, but Division 43 is generally unavailable unless substantial renovations have occurred.

    How do renovations affect my depreciation claims?

    Renovations can increase your capital works deductions under Division 43. Ensure your depreciation schedule is updated to reflect these changes.

    What happens if my commercial property is partially residential?

    You'll need to allocate costs between the residential and commercial portions to accurately claim depreciation.

    How is depreciation reported in my tax return?

    Depreciation is reported as a deduction in your tax return, reducing your taxable income. Your accountant can assist in this process.

    Are there state-specific rules for commercial property depreciation?

    While depreciation rules are federally governed, local council regulations can affect construction costs and, subsequently, your depreciation claims.

    Related Articles

    Read Full Article Free Calculator
    commercial propertydepreciationDivision 40Division 43tax deductions

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