Understanding Capital Gains on Investment Property
If you’re considering selling an investment property in Australia, it’s essential to understand how Capital Gains on investment property works. Capital Gains Tax (CGT) applies to the profit you make when selling an investment property. Essentially, it’s the difference between the sale price and the original purchase price, including any related expenses. If you sell the property for more than you paid, the Australian Taxation Office (ATO) will require a portion of that profit.
As a property investor, landlord, or homeowner with a rental property, being aware of your CGT obligations can help you plan your sale more effectively. In short, minimising your CGT liability can lead to a greater return on your investment.

What is Capital Gains on Investment Property?
Capital Gains Tax (CGT) applies to the profit you make when you sell any capital asset. (For the purpose of this article, we’re focusing on investment property.)
For investment properties in Australia, CGT kicks in when you sell the property and make a profit. This is because an investment property is seen as an income-generating investment. On the other hand, your primary residence is a personal-use asset, so it is usually exempt from CGT.
How Capital Gains on Investment Property Is Calculated
Here’s a step-by-step guide to help you calculate your Capital Gains Tax.

Step 1: Work Out How Much You Received
Capital proceeds refer to the sale price or insurance payout if the property is lost (for example, because of a fire or natural disaster).
If you sell your investment property at market value, that’s your capital proceeds. If you give it away or sell it for less than it’s worth (for example, if you sell it to a relative or a friend), you still have to use the market value for your calculations.
Step 2: Work Out How Much It Cost You
The cost base includes the price you originally paid for the asset and the costs you incurred along the way. These incurred costs include legal fees, stamp duty, and selling costs. If you made a loss on the asset, you use a reduced cost base instead.
However, as a special rule, if you bought the investment property before 21 September 1999, you will be able to either:
- Adjust the original purchase cost of your property for inflation, so you pay less tax on long-held assets (indexation method), or
- Use the standard Capital Gains Tax (CGT) discount (see Step 5).
The better option depends on your situation. Consider how long you’ve held the property, the rate of inflation during your ownership, the size of your capital gain, your individual tax bracket, and even the costs included in your cost base.
A finance broker helps you analyse your specific data and will help determine which method will result in the lowest possible CGT liability.
Step 3: Calculate Your Capital Gain or Loss
After working out the corresponding amounts in the previous steps, subtract your cost base from your capital proceeds.
Follow this Formula:
Capital Gain or Loss = Capital Proceeds − Cost Base
If the result is positive, you have a capital gain (profit). If it’s negative, you have a capital loss.
If you’ve sold multiple assets during the year, repeat all three steps for each one.
Step 4: Subtract Any Capital Losses
If you’ve made any capital losses (from this year or previous years), subtract them from your total Capital Gains.
Tip: It’s best to use your losses against gains that don’t qualify for the CGT discount first, to minimise tax.
If you still have a positive amount, you have a net capital gain and your final taxable profit, so continue to the next step.
If you now have a negative amount, this is your net capital loss (remaining loss you carry forward). You can’t deduct it from other income, but you will be able to carry it forward to offset future gains.
Step 5: Apply the Capital Gains Tax Discount If Eligible
If you’ve owned the asset for at least 12 months, you may qualify for any of these discounts:
- Individuals & Trusts: 50% discount
- Super Funds: 33.33% discount
- Companies: No discount
Special rule: If you used the indexation method in Step 2 (for assets bought before 21 Sept 1999), you can’t apply the CGT discount.
If you have a net capital gain, pay tax on it at your usual income tax rate. If you have a net capital loss, you carry it forward to reduce future Capital Gains Tax.
Example of Capital Gains on Investment Property
Imagine you bought an investment property that cost you $1,059,500 five years ago and then sold it for $1,350,000. Using the steps above, you can calculate your capital gain as follows:

Your capital gain on the investment property is:

You have no other Capital Gains or Losses, so you are ready to apply your tax discounts.
Use the CGT discount because you are an Australian resident and owned the asset for at least 12 months:


You report a net capital gain of $145,250 and a capital gain of $290,500 at question 18 – labels A and H in your tax return (supplementary section). You will pay tax on the net capital gain at your marginal income tax rate as listed on the ATO website.
Quick note: The marginal income tax rate is the percentage of tax you pay on your next dollar of income, based on your tax bracket. You can check this when you lodge your taxes.
Take note that the capital gain is based on the contract exchange date, not settlement. For example, if you exchange contracts on 4 June 2025 and settle on 6 July 2025, you must report the capital gain in your income tax return for the financial year ending 30 June 2025.
CGT Discounts and Exemptions
One of the best parts of Australia’s CGT system is the range of discounts available for long-term investments, so it’s easier to hold onto more of your profits when selling an investment property:
- Capital Gains Tax (CGT) 50% discount: If you’ve owned the property for more than 12 months, you’ll only pay tax on half the capital gain. This is a huge advantage for long-term investors as it reduces the amount you owe.
- Principal place of residence exemption: If the property was your main home for part of the time you owned it, you might qualify for a partial CGT exemption. This exemption is useful if you’ve converted your primary residence into a rental property, as it allows you to avoid paying the full CGT.
- The 6-year rule: If you move out of your home and rent it out, it is still treated as your principal place of residence for up to six years, so you avoid CGT during this time. This rule is useful if you’re relocating for work or for other reasons but plan to return to your home. If you sell within the six-year period, you may not have to pay any CGT at all.

How to Minimise Capital Gains on Investment Property
Want to keep more of your profits? Here are some well-proven strategies to reduce your Capital Gains Tax so you make the most of your investment returns:
- Time your sale: Sell in a year when your income is lower to reduce the tax you pay on your capital gain. For example, if you’re planning to retire or take a break from work, that could be an ideal time to sell because your taxable income will lower.
- Offset Capital Losses: If you’ve sold other investments at a loss, use those losses from other investments to reduce the amount of tax you pay on your profit. This helps lower your overall tax liability. It is also a powerful strategy if you have multiple investments, so you strategically balance gains and losses.
- Record deductible expenses: Keep records of any improvement costs, legal fees, and maintenance expenses associated with the property. The more detailed and accurate your records, the easier it is to claim these deductions to lower your taxable amount.
- Contribute to your super: Make extra contributions to your super fund to lower your taxable income. This approach helps with tax efficiency and strengthens your retirement savings.
- Hold your property strategically: Holding your property for at least 12 months makes you eligible for the 50% CGT discount, which gives you more savings.
- Spread your gains: Stagger the sale of multiple properties or investments over different financial years to avoid a higher tax bracket.
Special Considerations for Inherited Property
Inherited investment properties come with their own set of complex Capital Gains Tax (CGT) rules. The date of inheritance and how the property was used by the deceased both help determine your CGT obligations.

If the deceased used the property as their primary residence, you may qualify for a full or partial CGT exemption, but the rules around this are tricky and depend on specific conditions, such as the timing of the sale and the circumstances of the inheritance.
If you decide to hold onto the property and later use it as a rental, the CGT calculation could change further due to change in purpose and valuation, cost base adjustments, and even the 6-year rule. This is why consulting with a professional helps you make the most informed and financially beneficial decisions.
Common Mistakes to Avoid
Don’t let avoidable mistakes cost you more in Capital Gains on investment property. It’s often the small oversights that lead to big financial consequences:
- Misunderstanding the 6-year rule: Make sure you understand when the clock starts on the six-year period and what circumstances might affect your eligibility.
- Poor record-keeping: Failing to track expenses and improvements means you could miss out on deductions that would otherwise lower your CGT liability. Keep detailed records of every dollar spent to prove your expenses to the ATO.
- Overlooking capital losses: If you’ve sold other investments at a loss, those losses offset your Capital Gains, but many property investors forget this option. Review your entire investment portfolio to find opportunities that help minimise your CGT.
- Not seeking advice: CGT laws are complex, and a professional helps you navigate them efficiently by identifying strategies and exemptions so you’re taking full advantage of legal tax-saving opportunities.
- Selling at the wrong time: Timing your sale without considering your annual income pushes you into a higher tax bracket, which increases your overall tax burden.
Planning Your Strategy
Learning about Capital Gains on investment property feels overwhelming, but with the right knowledge and a clear strategy, you will be able to manage your obligations and maximise your savings. Consult with a financial broker or tax professional to take advantage of all possible discounts, exemptions, and deductions.
Tax laws change, so be sure to check the ATO website for updates. If you’re planning to buy, sell, or refinance an investment property, working with the right strategy helps you maximise your returns. Contact us to explore options that align with your investment goals.
