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Tax Depreciation · Koste Knowledge Base

What is a Quantity Surveyor and Why Do You Need One?

Published 26 June 2026 · Last updated 26 June 2026

Quick Answer

A Quantity Surveyor is a construction and property cost expert. They are crucial for investors seeking to maximise tax depreciation benefits on properties. By preparing detailed depreciation schedules, they ensure compliance with Australian tax laws and enhance the return on investment.

Understanding the role of a Quantity Surveyor can significantly impact your investment returns. These professionals specialise in construction cost management and are vital for investors aiming to maximise tax depreciation benefits.

What a Quantity Surveyor Does

A Quantity Surveyor (QS) is an expert in construction cost management and property taxation. In Australia, they play a crucial role in preparing tax depreciation schedules, particularly under Division 40 and Division 43 of the Income Tax Assessment Act 1997. They assess the cost of plant and equipment (Division 40) and capital works (Division 43) to help investors claim maximum depreciation deductions. A common misconception is that any accountant can handle depreciation schedules, but only a QS has the expertise to accurately assess construction costs and ensure compliance with ATO guidelines.

How This Works in Practice

Consider a 2015-built 3-bedroom house in Richmond, Melbourne, purchased for $950,000. A Quantity Surveyor inspects the property and prepares a comprehensive depreciation schedule. In the first year, the QS identifies $15,000 worth of deductions from Division 40 and $10,000 from Division 43. At a 37% marginal tax rate, this results in a tax saving of $9,250 in the first year alone.

Professional Insight

In our experience, many investors overlook the initial consultation with a QS, which can uncover additional assets eligible for depreciation. One thing we frequently see is investors underestimating the value of plant and equipment, leading to missed deductions. Most investors don't realise the importance of periodic updates to depreciation schedules, especially after renovations. Engaging a QS early can prevent compliance issues and enhance tax benefits.

When Does the Answer Change?

  • Post-9 May 2017 Properties: For second-hand residential properties acquired after this date, Division 40 deductions for previously used plant and equipment are not claimable.
  • Pre-1987 Buildings: Properties built before this date have limited Division 43 deductions unless substantial renovations have occurred.
  • Commercial Properties: These often have different depreciation rules compared to residential properties and can offer more substantial deductions.
  • Joint Ownership: Depreciation benefits are divided proportionally among owners, which can affect individual tax outcomes.

When Should You Seek Professional Advice?

Engage a QS when purchasing an investment property to ensure accurate and maximised depreciation claims. Complex scenarios, like mixed-use properties or significant renovations, require tailored advice. A Chartered QS and your accountant can work together to align depreciation schedules with your overall tax strategy, ensuring compliance and maximising benefits.

What to Do Next

  • Identify Properties: Determine which of your properties qualify for depreciation.
  • Engage a QS: Contact a qualified Quantity Surveyor to arrange a property inspection.
  • Prepare a Schedule: Have the QS prepare a detailed depreciation schedule.
  • Consult Your Accountant: Review the schedule with your accountant to integrate it into your tax return.
  • Update Regularly: Reassess your property after renovations or significant changes.
  • Review Annually: Ensure your schedule reflects the latest tax laws and property changes.
  • Frequently Asked Questions

    How does a Quantity Surveyor help with tax depreciation?

    A QS prepares detailed depreciation schedules, identifying eligible deductions under Division 40 and Division 43, maximising your tax benefits and ensuring compliance.

    Can I claim depreciation on properties in all Australian states?

    Yes, depreciation can be claimed on properties across Australia, but specific state regulations or incentives might affect the process.

    What happens if I don't use a Quantity Surveyor?

    Without a QS, you risk under-claiming deductions, leading to higher tax payments and potential non-compliance with ATO guidelines.

    How is the depreciation schedule used in my tax return?

    Your accountant uses the depreciation schedule to claim deductions in your tax return, reducing taxable income and increasing your refund.

    Are there differences in depreciation for commercial vs residential properties?

    Yes, commercial properties often have different eligible deductions and rates compared to residential properties, potentially offering greater benefits.

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