Australian Capital Gains Tax Calculator
Work out the capital gain on shares, ETFs, managed funds or crypto, apply your capital losses and the CGT discount, and see what it adds to your tax.
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You will need: purchase price, sale proceeds, buy and sell dates, costs, other income.
The Asset
Brokerage on both the buy and the sell belongs in your costs.
The figures most people have. Nothing you enter is lost if you switch.
Use the date you signed or placed the order, not the settlement date. The sale date sets which financial year the gain falls in.
Brokerage and transaction fees on both the buy and the sell.
Your Losses And Income
Losses come off the gain before the discount, which is what makes them worth more than they look. They can only reduce capital gains, never your salary.
Salary and any other income, before the gain. It sets the rates the gain is taxed at.
Estimates only, not financial advice. Covers an Australian resident individual disposing of one asset, using ATO rules for the selected financial year.
Enter what you paid, what you sold it for, and both contract dates.
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Frequently asked questions
Is capital gains tax a separate tax?
No. There is no separate capital gains tax in Australia. Your net capital gain is added to your taxable income for the year and taxed at your ordinary rates, along with the Medicare levy and any study loan repayment. That is why the amount depends on the rest of your income, and why two people with the same gain can pay very different amounts.
How does the 50% CGT discount work?
An Australian resident individual can reduce a capital gain by half if they acquired the asset at least 12 months before selling it. The ATO counts that period without the day you bought and the day you sold, so buying on 20 June and selling on 20 June the following year is one day short. The discount applies to what is left after your capital losses, not to the gross gain.
When do capital losses come off?
Before the discount. You apply your current year capital losses first, then any losses carried forward from earlier years, and only then halve what remains. Applying the discount first would understate the gain. Capital losses can only reduce capital gains, never your salary or other income, and anything left over carries forward indefinitely.
Which date counts, the contract date or settlement?
The contract date. A capital gains tax event happens when you enter into the contract to sell, not when the money changes hands. That date decides which financial year the gain falls in and whether you held the asset long enough for the discount, so this calculator asks for both contract dates.
What goes into the cost base?
What you paid for the asset, plus the incidental costs of buying and selling it such as brokerage, plus any capital improvements and costs of establishing or defending your title. Non-deductible costs of owning it can also count, though they rarely apply to shares. Amounts you have already claimed as a deduction cannot be counted again.
Can I use this for an investment property?
No. Property brings in the main residence exemption, the six-year absence rule, partial rental use, market value when a home first earns income, and capital works adjustments. Those change the answer so much that a general figure would mislead, so property is left out rather than simplified.
What happens to the discount from 1 July 2027?
For gains accruing from 1 July 2027, the 50% discount for individuals, trusts and partnerships is replaced by cost base indexation and a minimum 30% tax on real gains. That is already law. This calculator covers sales up to 30 June 2027 and does not estimate a sale on or after 1 July 2027, rather than showing a figure worked out under rules that no longer apply.