Capital Gains Tax Calculator Australia
Sold shares, a property or another asset this year? Enter what you paid, what you sold for, your costs and how long you held it. We'll estimate your net capital gain after losses and the 50% discount, then the tax it adds at your marginal rate.
- Gross gain$0
- Less capital losses$0
- Less 50% CGT discount$0
- Net capital gain$0
Enter a purchase and sale amount to see your estimate.
Property, multiple parcels of shares or a main-residence exemption to factor in? We'll get the cost base right and lodge it.
Get a CGT quote →General information only, current for the 2025-26 financial year. This estimate uses resident marginal rates and ignores the Medicare levy, the main-residence exemption, part-year residency, indexation for pre-1999 assets, small business CGT concessions and other special rules. It is not personal tax advice. For a position you can lodge, talk to us.
A Few Things This Calculator Assumes
How is the capital gain worked out?
Your capital gain is the sale proceeds less the cost base. The cost base is what you paid plus buying and selling costs (brokerage, stamp duty, legal fees) and any capital improvements. We then apply your capital losses, and if you held the asset for more than 12 months as an individual, we halve what's left with the 50% CGT discount. The net gain is added to your taxable income for the year.
How does the 50% CGT discount work?
If you're an individual or a trust and held the asset for more than 12 months before selling, only half the net gain is taxable. Companies don't get the discount. We apply your capital losses first, then halve what remains, which is the order the ATO requires. Switch the holding period toggle to see the difference it makes.
What about the main residence and property?
Your main home is usually exempt from CGT, so this calculator is aimed at investment properties, shares and other assets. Property cost bases get complicated fast (purchase stamp duty, capital improvements, periods it was rented versus lived in, the six-year rule). Put your best figures in for an estimate, then let us confirm the cost base before you lodge.
Why does my other income change the tax?
A net capital gain is taxed at your marginal rate, so it sits on top of your other income. We estimate the tax as the difference between tax on (income plus gain) and tax on income alone, using the FY2025-26 resident brackets. Add your salary or business income above for a sharper figure, otherwise we assume the gain is your only income.
Selling an Asset? Get the Cost Base Right
Book a 30-minute call with a senior accountant. We'll confirm your cost base, apply every discount and concession you're entitled to, and tell you exactly what the tax and our fee will be before you lodge.
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