How Capital Gains Tax Works for Property in Australia: A Guide
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When you sell a property in Australia, the profit you make is generally subject to Capital Gains Tax (CGT). This is not a separate tax but rather a component of your income tax, calculated according to specific rules for the 2025–26 financial year. Understanding how this works is critical for any property owner to correctly manage their tax obligations upon sale. This guide provides a detailed analysis of the core principles, calculations, and exemptions relevant to property transactions.
Based on our observations at Baron Tax & Accounting, property owners in Brisbane often focus heavily on the final sale price, sometimes overlooking that tax is calculated on the profit (the capital gain), not the total proceeds. This distinction is fundamental to correctly calculating and managing potential tax liabilities.
What Is Capital Gains Tax on Australian Property?
CGT is triggered by a CGT event, which typically occurs when your ownership of an asset ends. For property, this most commonly happens when you:
Sell the property.
Gift or transfer ownership to another person, even if no money is exchanged.
Lose the property through destruction or compulsory acquisition.
If you realise a capital gain from such an event, the amount is added to your assessable income and taxed at your marginal income tax rate. Conversely, a capital loss can be used to offset capital gains in the same year or carried forward to reduce gains in future years. A capital loss cannot be used to reduce other income, such as salary or business income.
Key Concepts to Understand
CGT generally applies only to properties acquired on or after 20 September 1985. Assets acquired before this date are typically considered 'pre-CGT' and are exempt from capital gains tax upon disposal.
For properties acquired after this date, two primary provisions can significantly reduce your tax liability:
The Main Residence Exemption: If the property was your main residence for the entire ownership period, any capital gain from its sale is usually exempt from tax.
The 50% CGT Discount: For individuals and trusts who have owned an investment property for more than 12 months, the taxable capital gain can generally be reduced by 50%.
This guide will examine these rules in detail. For a higher-level summary first, you may find our introductory article which explains capital gains tax concepts more broadly useful.
Calculating Your Capital Gain or Loss Step by Step
The calculation of a capital gain or loss relies on accurate record-keeping. The fundamental formula is straightforward.
You subtract the property's cost base (the costs of acquiring, holding, and selling it) from its capital proceeds (what you received for it). A positive result is a capital gain, while a negative result is a capital loss. The accuracy of these two figures is paramount.
Step 1: Determine Your Capital Proceeds
The first step is to identify the capital proceeds. For most property sales, this is simply the sale price stated on the contract.
For instance, if you sold an investment property in Brisbane for $750,000, your capital proceeds are $750,000. It is important to use the official contract price before deducting any costs such as real estate agent commissions or legal fees, as these are accounted for in the cost base.
Step 2: Calculate the Cost Base
The cost base includes more than just the original purchase price. Properly calculating this figure is essential for minimising your capital gain. The Australian Taxation Office (ATO) allows the inclusion of expenses across five main elements.
Element 1 (Acquisition Costs): The original purchase price paid for the property.
Element 2 (Incidental Costs): Transactional fees associated with buying and selling the property. This includes stamp duty, legal fees, conveyancing costs, borrowing expenses, and real estate agent commissions.
Element 3 (Ownership Costs): For properties acquired after 20 August 1991, certain holding costs such as council rates, land tax, and loan interest can be included. However, these costs can only be part of the cost base if they have not been claimed as a tax deduction against rental income.
Element 4 (Capital Improvement Costs): Costs of work that adds significant value or extends the property's life, such as major renovations or extensions. This does not include general repairs or maintenance.
Element 5 (Title Costs): Costs incurred to preserve or defend your ownership title, such as legal fees related to a boundary dispute.
A higher cost base results in a lower capital gain, which in turn reduces your tax liability. Diligent record-keeping is therefore directly beneficial. For further examples, our guide on how CGT on investment property is calculated explores more specific scenarios.
Step 3: Understand the Reduced Cost Base
If the sale results in a capital loss, a reduced cost base must be used for the calculation. The reduced cost base is calculated similarly to the cost base but excludes the third element of costs (ownership costs like council rates and interest). This rule prevents property owners from using general holding expenses to create or inflate a capital loss for tax purposes.
The calculation process can be visualised as follows:
Calculation Flow for Net Capital Gain/Loss
+--------------------+
| Capital Proceeds | (e.g., Sale Price)
+--------------------+
|
MINUS
|
+--------------------+
| Cost Base | (For calculating a GAIN)
+--------------------+
||
+--------------------+
| Gross Capital Gain |
+--------------------+
|
APPLY
|
+--------------------+
| CGT Discounts | (e.g., 50% discount)
+--------------------+
||
+--------------------+
| Net Capital Gain | (Added to assessable income)
+--------------------+Following these steps methodically ensures an accurate and defensible CGT calculation.
Key Exemptions and Discounts to Reduce Your CGT
The Australian tax system includes several provisions that can reduce or eliminate your CGT liability on a property sale. These are not loopholes but established rules designed to provide relief to homeowners and long-term investors.
The Main Residence Exemption
The main residence exemption is the most significant CGT relief for most Australian homeowners. If the property you sell has been your home for the entire ownership period, you generally do not pay CGT.
To qualify for the full exemption, the property must:
Contain a dwelling in which you have lived.
Not have been used to produce assessable income (e.g., fully rented out).
Be on land of two hectares or less.
Due to the complexities involved, we have prepared a dedicated guide on the main residence exemption to address specific scenarios.
Partial Exemptions and the Six-Year Rule
If you move out of your home and rent it out, you may still be entitled to a partial exemption. CGT is calculated based on the proportion of the ownership period the property was used to generate income.
The 'six-year absence rule' is a key provision in this context. It allows you to continue treating a property as your main residence for up to six years after you move out, provided you do not claim another property as your main residence during that time. If you use the property to produce income during this absence, this rule can provide a full exemption if you sell within the six-year period. If the absence exceeds six years, CGT will generally apply to the period beyond the six years.
The 50% CGT Discount
For investment properties, the 50% CGT discount is a fundamental concession. It permits eligible individuals and trusts to reduce their taxable capital gain by half.
The primary condition is that you must own the property for more than 12 months before signing the contract of sale. This discount is not available to companies. For example, a $200,000 capital gain for an eligible individual investor in Brisbane could be reduced to a net capital gain of $100,000. This amount is then added to the individual's assessable income for the year.
Small Business CGT Concessions
If the property sold was used in your small business, you may be eligible for a separate set of generous concessions. These are intended to assist business owners with their retirement funding and business reinvestment.
The four small business CGT concessions are:
15-year exemption: Can eliminate the capital gain if you have owned the asset for 15 years and meet certain conditions, such as being over 55 and retiring.
50% active asset reduction: An additional 50% discount on the capital gain after any other applicable discounts.
Retirement exemption: Allows exemption of capital gains up to a lifetime limit.
Rollover: Defers the capital gain if proceeds are reinvested into a replacement business asset.
These concessions have strict eligibility criteria, including turnover thresholds and active asset tests. They are particularly relevant for businesses that own their commercial premises and require careful planning to apply correctly.
Real-World CGT Calculations in Brisbane
Applying the rules to practical scenarios helps clarify their real-world impact. The following examples demonstrate how the cost base, discounts, and exemptions function in the context of the Brisbane property market.
Example 1: Straightforward Investment Property Sale
An individual purchased an investment apartment in New Farm in March 2018. It was rented out continuously and never used as a main residence. The property is sold under a contract signed in October 2025. As the ownership period exceeds 12 months, the 50% CGT discount is available.
Capital Proceeds: The contract sale price is $850,000.
Cost Base: * Original purchase price: $600,000 * Stamp duty on purchase: $20,500 * Legal fees (purchase and sale): $2,200 * Real estate agent's commission on sale: $17,000 * Total Cost Base: $600,000 + $20,500 + $2,200 + $17,000 = $639,700
Gross Capital Gain: * $850,000 (Capital Proceeds) – $639,700 (Cost Base) = $210,300
Application of 50% CGT Discount: * $210,300 x 50% = $105,150
The net capital gain of $105,150 is added to the individual's assessable income for the year.
Example 2: Partial Main Residence Exemption
An individual purchased a house in Paddington, Brisbane, in July 2016 for $900,000. They lived in it as their main residence for five years (until July 2021). They then moved to a new main residence and rented out the Paddington house for four years before selling it in July 2025 for $1,500,000.
As the property was used to produce income for part of the ownership period, only a partial main residence exemption applies. The capital gain must be apportioned.
First, the gross capital gain is calculated. Assuming total incidental costs (e.g., stamp duty, legal fees) were $50,000:
Calculation Step | Description | Amount |
|---|---|---|
Capital Proceeds | Final Sale Price | $1,500,000 |
Cost Base | Purchase Price ($900,000) + Costs ($50,000) | ($950,000) |
Gross Capital Gain | Proceeds minus Cost Base | $550,000 |
Next, the gain is apportioned based on the income-producing period.
Total Ownership Period: 9 years (3,285 days)
Income-Producing Period: 4 years (1,460 days)
Apportionment Formula: (Gross Capital Gain) x (Number of Days Rented Out / Total Days Owned) $550,000 x (1,460 days / 3,285 days) = $244,749 (This is the taxable portion of the gain)
The 50% CGT discount applies to this taxable portion as the asset was owned for over 12 months.
$244,749 x 50% = $122,374.50
The net capital gain to be declared is $122,374.50. This demonstrates the importance of tracking dates and property usage. For such nuanced calculations, engaging a specialist tax accountant in Brisbane is advisable to ensure accuracy.
Special CGT Situations You Should Know About
Property transactions can involve complexities beyond a simple sale. Australian CGT law provides specific rules for less common situations.
Foreign Residents and Australian Property
The CGT rules are significantly stricter for foreign residents (for tax purposes) selling Australian property.
Loss of Main Residence Exemption: Since 1 July 2020, foreign residents generally cannot claim the main residence exemption, with very limited exceptions.
Loss of 50% CGT Discount: The 50% CGT discount is generally denied for capital growth that occurred after 8 May 2012 while the owner was a non-resident. A market valuation may be required to apportion the gain.
Foreign Resident Capital Gains Withholding: If a foreign resident sells Australian real property, the purchaser may be required to withhold 15% of the purchase price and remit it to the ATO, unless the vendor provides a valid variation notice. Australian resident vendors must provide a valid clearance certificate by settlement to avoid withholding. The seller can claim the withheld amount as a credit when lodging their Australian tax return.
Inherited Properties and Deceased Estates
Inheriting a property does not trigger an immediate CGT event. The tax liability is deferred until the beneficiary sells or disposes of the property. The calculation of the gain depends on the original purchase date and use.
Pre-CGT Assets: If the property was acquired by the deceased before 20 September 1985, the beneficiary's cost base is the market value at the date of death.
Post-CGT Assets: If acquired on or after that date, the beneficiary inherits the deceased's original cost base.
A full exemption may apply if the property was the deceased's main residence and was not used to produce income, provided the beneficiary sells it within two years of the date of death.
The Pre-CGT Assets Exemption
Any property acquired before the commencement of the CGT regime on 20 September 1985 is generally exempt from CGT. When a genuine pre-CGT asset is sold, no tax is payable on the profit. Documentary evidence confirming the acquisition date is essential to claim this exemption.
Your Guide to CGT Record Keeping and Reporting
Accurate record-keeping is not just a compliance exercise; it is a critical component of minimising your CGT liability. Every verifiable cost included in your property's cost base directly reduces your taxable capital gain.
Critical Documents for Your Cost Base
To construct a robust and defensible cost base, you must retain documentation for all relevant costs.
Purchase and Sale Contracts: These establish acquisition and disposal dates and prices.
Stamp Duty Receipts: A significant component of the initial cost base.
Legal and Conveyancing Invoices: All professional fees for the purchase and sale.
Records of Capital Improvements: Invoices and receipts for major renovations or additions.
Ownership Cost Records: Records of costs like council rates and interest, if you intend to include them in the cost base (and have not otherwise claimed them as deductions).
ATO Record-Keeping and Reporting Rules
The ATO requires that you keep all CGT-related records for at least five years after lodging the tax return in which the CGT event is reported. If you sold a property and reported the gain in your 2026 tax return, you must keep all relevant documents until at least 2031. Our guide on the 8 essential records you need to keep to be ATO-compliant provides a useful checklist.
The net capital gain is reported on your annual income tax return and added to your other assessable income. The total is then taxed at your marginal rate.
The CGT event occurs on the date the contract of sale is signed, not the settlement date. The gain or loss must be reported in the financial year the contract was executed.
Frequently Asked Questions About Property CGT
Here are answers to some of the most common questions regarding Capital Gains Tax on property in Australia.
How Is CGT Different From Inheritance Tax?
Australia does not have a separate inheritance tax. However, CGT may apply when an inherited property is later sold by the beneficiary. The tax liability is deferred from the time of death until the beneficiary disposes of the asset. The final tax calculation depends on factors such as the original purchase date and how the property was used.
Do I Pay CGT if I Gift a Property to My Child?
Yes. Gifting a property is a CGT event. The ATO treats the transfer as a disposal at the property's market value on the date of the gift. You must calculate your capital gain or loss based on this market value, which can lead to a tax liability even though no cash was received.
What Happens if I Sell an Investment Property at a Loss?
If you sell a property for less than its reduced cost base, you make a capital loss. This loss cannot be used to offset other income like salary. Instead, a capital loss must first be used to reduce any capital gains made in the same financial year. If your losses exceed your gains, the net capital loss can be carried forward indefinitely to offset capital gains in future years.
Can I Avoid CGT by Moving Into My Rental Property Before Selling?
Moving into a rental property to make it your main residence does not eliminate the CGT liability accumulated while it was an investment. Upon sale, a partial main residence exemption would apply. The capital gain must be apportioned based on the periods the property was used as a main residence versus when it was rented out. This will likely reduce your CGT but will not remove the tax liability for its income-producing period.
Summary
Key Compliance: CGT on property is part of your income tax. Your net capital gain is added to your assessable income and taxed at your marginal rate.
Calculation: The capital gain is the Capital Proceeds minus the Cost Base. A higher, well-documented cost base reduces your tax.
Discounts: The 50% CGT discount is a key concession for individuals holding property for over 12 months.
Exemptions: The main residence exemption can eliminate CGT, but rules apply, especially for partial use or absences.
Risk Areas: Incorrectly calculating the cost base, misinterpreting the main residence rules, and being unaware of the rules for foreign residents are common pitfalls.
Brisbane-Relevant Considerations: With significant property value changes, Brisbane owners must be diligent in tracking their cost base from purchase to sale to ensure the gain is calculated accurately.
Timing: The CGT event happens on the contract date, not settlement. This determines which financial year you report the gain or loss.
Official ATO Reference
For further detailed information directly from the source, you can review the Australian Taxation Office's guidance on CGT for property.
ATO – CGT when selling your rental property: https://www.ato.gov.au/individuals-and-families/investments-and-assets/capital-gains-tax/property-and-capital-gains-tax/cgt-when-selling-your-rental-property
Key Points to Review
The information provided in this guide is general in nature and does not constitute financial or tax advice. The application of Capital Gains Tax rules can be complex and depends entirely on your individual circumstances, including your residency status, property usage history, and eligibility for various concessions.
Before finalising any property transaction or lodging your tax return, it is prudent to seek professional advice tailored to your specific situation. A qualified tax advisor can help ensure you meet all your compliance obligations and correctly apply all relevant exemptions and discounts. For official government information, please refer to the Australian Taxation Office (ATO) and other relevant government websites.
ATO – Capital Gains Tax: https://www.ato.gov.au/individuals-and-families/investments-and-assets/capital-gains-tax
Baron Tax & Accounting
Website: https://www.baronaccounting.com Email: info@baronaccounting.com Phone: +61 1300 087 213 Whatsapp: 0450 468 318
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