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Data from official sources · Made in Argentina

Capital gains tax calculator

Capital gains tax is part of your income tax, not a separate tax. A capital gain increases the tax you pay at your individual income tax rate.

Enter what the asset cost you, what you sold it for and your other income for the year. You see the extra tax the sale adds to your bill.

How it's calculated

  1. The capital gain is the sale price minus the cost base.
  2. If you are an Australian resident and owned the asset for at least 12 months, you reduce the gain by 50%.
  3. The net capital gain is added to your other income. The extra tax is the difference between the tax with and without the gain, using the 2026-27 rates and the 2% Medicare levy.

An example

Selling for $400,000 an asset that cost $300,000, after more than 12 months, gives a $100,000 gain and a $50,000 net capital gain. With $85,000 of other income, the extra tax is $16,000.

Frequently asked questions

How are the 12 months counted?

You exclude the day you acquired the asset and the day of the CGT event. If there is a contract of sale, the CGT event happens on the contract date, not at settlement.

Is the 50% CGT discount changing?

The 2026-27 Federal Budget proposes replacing it with an inflation-based discount for gains arising after 1 July 2027. It is not law yet, and the ATO says the changes don't apply to Tax Time 2026.

Is every asset subject to CGT?

No. The ATO keeps a list of CGT assets and exemptions. Check it first, because this calculator assumes the whole gain is taxable.

Key terms

Cost base
What the asset cost you, plus other costs the ATO lets you include.
CGT event
The point at which you make a capital gain or loss, usually when you sell.
Capital loss
When you sell for less than the cost base. It can reduce capital gains.

Up-to-date official data

Data checked against the official source on .

We check the official sources automatically, every day.

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