Capital Gains Tax (CGT) is one of the most significant — and often misunderstood — costs for Australian property investors. When you sell an investment property for more than you paid for it, the profit (your capital gain) is added to your taxable income for that year. Understanding CGT can save you tens of thousands of dollars and help you plan your property exit strategy far more effectively.
At Assembly Finance, we work with property investors every day to structure their loans and finances in ways that maximise after-tax returns. This guide breaks down exactly how CGT works — and how to legally minimise it.
How Is CGT Calculated in Australia?
Your capital gain is calculated as: Capital Gain = Sale Price − Cost Base
Your cost base includes the original purchase price, stamp duty and legal fees paid at purchase, any capital improvements made to the property (e.g. renovations), and costs associated with selling (agent fees, legal fees, marketing). Your net capital gain is then added to your assessable income and taxed at your marginal income tax rate.
The 50% CGT Discount: Your Most Powerful Tool
If you hold an investment property for more than 12 months before selling, you only include 50% of the capital gain in your taxable income. This is the single biggest CGT reducer available to individual investors.
Example: You buy an investment property for $500,000 and sell it for $750,000 after two years. Your raw capital gain is $250,000. With the 50% discount, only $125,000 is added to your taxable income — potentially saving you $46,250 in tax if you’re on the 37% marginal rate.
CGT on Your Primary Residence
Your main residence is generally exempt from CGT. However, a partial exemption applies if you rented out part or all of your home at any point. The 6-year rule allows you to treat a former main residence as your primary home for up to 6 years after moving out — provided you don’t nominate another property as your main residence.
Strategies to Minimise Your CGT Liability
1. Hold for More Than 12 Months — The 50% discount is the single biggest CGT reducer available. Never sell within 12 months unless you have a compelling reason.
2. Time Your Sale in a Low-Income Year — Since CGT is taxed at your marginal rate, selling in a year when your income is lower (e.g. after retirement, during parental leave, or between jobs) can significantly reduce the tax you pay.
3. Offset with Capital Losses — Capital losses from other investments can be used to offset your capital gains. Unused capital losses can be carried forward to future years indefinitely.
4. Maximise Your Cost Base — Every dollar you add to your cost base reduces your gain. Keep meticulous records of all capital improvements, legal fees, and selling costs.
5. Use Our Free CGT Calculator — Assembly Finance has built a free CGT Calculator designed specifically for Australian property investors. It factors in the 50% discount, your marginal tax rate, Medicare levy, and even inflation adjustments.
How Assembly Finance Can Help
Understanding CGT is only part of the puzzle. The right loan structure — including interest-only periods, offset accounts, and the way you allocate debt between investment and owner-occupied properties — can have a major impact on your tax outcomes.
Our team specialises in property investment loans. Get in touch with James for a free, obligation-free assessment of your property investment strategy.
