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What CGT Do I Pay if I Sell My Investment Property?

Published 26 June 2026 · Last updated 26 June 2026

Quick Answer

When you sell an investment property in Australia, CGT applies to the profit made. Calculated as the difference between the sale price and the cost base, CGT is subject to discounts if held for over 12 months. Speak to your accountant for specifics.

Selling your investment property can trigger Capital Gains Tax (CGT), a tax on the profit you've made from the sale. Understanding how this tax is calculated and which discounts or exemptions may apply is crucial to managing your tax liability effectively.

How CGT on Investment Properties is Calculated

CGT is determined by the difference between your property's sale price and its cost base, which includes the original purchase price plus associated costs like stamp duty, legal fees, and any capital improvements. The gain is added to your taxable income for the year. If you've held the property for more than 12 months, you may qualify for a 50% CGT discount if you're an individual or a 33.33% discount if held within a superannuation fund. Companies, however, are not eligible for any CGT discount.

A common misconception among investors is that CGT is calculated on the entire sale price. In reality, it's only the net profit that is taxable. This often leads to surprises at tax time if not planned for.

How This Works in Practice

Consider an investor selling a 2005-built, 3-bedroom house in Melbourne's eastern suburbs. The property was purchased for $500,000 and sold for $800,000 in 2023. Over the years, the owner spent $50,000 on capital improvements. The cost base would be $550,000 (purchase price plus improvements). The capital gain is $250,000. Assuming a 37% marginal tax rate, and after applying the 50% discount (since the property was held for over 12 months), the taxable gain is $125,000, resulting in a tax liability of $46,250.

Professional Insight

In our experience, many investors overlook the importance of maintaining detailed records of all costs associated with their property, which can significantly impact the cost base and, consequently, the CGT liability. One thing we frequently see is investors underestimating the value of capital improvements, which can be added to the cost base to reduce taxable gains. What most investors don't realise is that selling costs, like agent fees, can also be included in the cost base. Additionally, timing the sale can be crucial; selling in a financial year where your income is lower can reduce the overall tax burden.

When Does the Answer Change?

  • Properties Acquired Before 20 September 1985: These are exempt from CGT as they were acquired before the introduction of the tax.
  • Properties Held in a Company Structure: Companies do not benefit from the CGT discount.
  • Foreign Residents: Different rules apply, such as ineligibility for the main residence exemption.
  • Partial Year Ownership: If you bought or sold partway through the year, your gain might need to be apportioned.
  • When Should You Seek Professional Advice?

    Given the complexity of CGT calculations, it's advisable to consult both a Chartered Quantity Surveyor and an accountant. While a QS can help establish an accurate cost base, an accountant will ensure the correct application of discounts and exemptions. This is particularly important if your circumstances involve complex structures or international elements.

    What to Do Next

  • Gather all records related to the property's purchase, improvement, and sale.
  • Calculate your cost base accurately, factoring in all allowable costs.
  • Determine your eligibility for any CGT discounts or exemptions.
  • Consult with a Chartered Quantity Surveyor to optimise your cost base.
  • Discuss your CGT liability with your accountant to plan for tax time.
  • Consider timing your sale to align with lower income years for tax efficiency.
  • Frequently Asked Questions

    How do I calculate the cost base of my property?

    The cost base includes the purchase price, stamp duty, legal fees, and capital improvements. Deduct any depreciation claimed.

    What happens if I sell my property within 12 months?

    Selling within 12 months means you won't qualify for the CGT discount, resulting in a higher taxable gain.

    Are there state-specific CGT rules?

    CGT is a federal tax, so it applies uniformly across Australia. However, state taxes like stamp duty differ.

    How is CGT reported in my tax return?

    CGT is reported under the capital gains section of your tax return. Ensure all calculations are accurate and supported by documentation.

    Does CGT apply to my principal place of residence?

    Generally, your main residence is exempt from CGT, but certain conditions can affect this, such as using part of it for business.

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