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

Commercial Property · Koste Knowledge Base

What is the GST Treatment of a Commercial Property Sale?

Published 26 June 2026 · Last updated 26 June 2026

Quick Answer

The GST treatment of a commercial property sale in Australia depends on several factors, including whether the property is new or existing, the GST registration status of the seller, and the nature of the transaction. Generally, GST is applicable to the sale of new commercial properties, but may not apply to existing properties unless the sale is part of a broader GST-registered business activity.

When selling a commercial property in Australia, understanding the GST implications is crucial. Under the Australian GST framework, the sale of commercial property is generally considered a taxable supply, meaning GST is applicable unless specific exemptions apply.

Under Division 40 of the A New Tax System (Goods and Services Tax) Act 1999, GST typically applies to the sale of new commercial properties. However, if the property is existing (not new), GST may not apply unless the sale is part of a GST-registered business activity. One common misconception is that all commercial property sales attract GST, which is not the case. The nature of the transaction and the GST registration status of the seller are critical in determining GST obligations.

To see how this plays out, consider a scenario where you are selling a newly constructed office building in Melbourne for $1.2 million. If you are GST-registered, the sale will attract GST, meaning the total sale price would be $1.32 million, which includes $120,000 GST. If the buyer is also GST-registered, they may be eligible to claim this GST as input tax credits, effectively reducing their cost.

In our experience reviewing thousands of properties across Australia, one pattern is clear: failing to register for GST when required can lead to significant penalties. Another common oversight is not considering the margin scheme, which can reduce the GST payable on a property sold at a profit. Many investors also overlook the importance of proper documentation, leading to disputes with the ATO.

The answer can differ depending on your situation. For example, if the property is sold as a going concern, GST may not apply. Similarly, if the sale involves a mixed supply (e.g., part commercial, part residential), the GST treatment could vary. Properties sold under the margin scheme also have distinct GST implications. Additionally, the treatment may differ if the property is located in specific regions with unique local taxes.

Given the complexities involved, engaging a Chartered Quantity Surveyor and an accountant is invaluable. They can ensure compliance with GST laws, help structure the sale to minimise tax obligations, and provide accurate documentation to support your GST position.

  • Determine if the property qualifies as new or existing, and whether GST applies.
  • Check your GST registration status and the implications for the sale.
  • Consider whether the margin scheme could be beneficial.
  • Consult with a Chartered Quantity Surveyor for a detailed cost base assessment.
  • Engage an accountant to ensure all GST obligations are met.
  • Prepare all necessary documentation to support your GST treatment.
  • Frequently Asked Questions

    Is GST always applicable to commercial property sales?

    No, GST is generally applicable to new commercial properties but may not apply to existing properties unless part of a GST-registered business activity.

    What is the margin scheme?

    The margin scheme is a method that allows GST to be calculated only on the profit margin rather than the full sale price, potentially reducing GST liability.

    How does the sale of a property as a going concern affect GST?

    If a property is sold as a going concern, and both parties are GST-registered, the sale may be GST-free, provided specific conditions are met.

    Does GST apply to mixed-use properties?

    GST treatment for mixed-use properties depends on the proportion of commercial versus residential use, requiring careful assessment.

    How do I report GST in my tax return?

    GST collected from a commercial property sale should be reported in your Business Activity Statement (BAS) for the relevant period.

    Related Articles

    Read Full Article Free Calculator
    GSTcommercial propertytaxationproperty saleinvestment

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