Capital Gains Tax Calculator Australia

Estimate a taxable capital gain (the profit included in your tax return) and the extra income tax it may create.

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Estimated CGT result

Capital gain before discount
$0.00
Taxable capital gain
$0.00
Estimated extra income tax
$0.00

This does not cover capital losses, exemptions, depreciation adjustments or company and trust rules.

What this calculator estimates

Capital gains tax is not a separate flat tax. A taxable capital gain (the part of your profit added to taxable income) is generally included with your other income and taxed at your marginal rate (the tax rate on your next dollar of income). Eligible Australian individuals may reduce a gain by 50% after holding the asset for at least 12 months.

How to use it

  1. Enter the amount received when the asset was sold.
  2. Enter the purchase price and eligible costs, called the cost base (costs used to work out the gain).
  3. Select whether the 50% discount applies and add an estimated marginal tax rate.
  4. Review the taxable gain and estimated extra tax.

Worked example

A $700,000 sale less a $450,000 purchase price and $30,000 of eligible costs leaves a $220,000 gain. With the 50% discount, $110,000 is taxable. At a 30% marginal rate, the simple tax estimate is $33,000.

Benefits

  • Separates the raw profit from the taxable amount.
  • Shows the effect of the 12-month discount.
  • Lets property and share investors test different cost and tax-rate assumptions.

Frequently asked questions

Is CGT a separate tax?

No. A net taxable capital gain is generally included in assessable income and taxed through the income tax system.

Does the 50% discount always apply?

No. Eligibility depends on the taxpayer, asset and ownership period. Companies do not receive the individual 50% discount.

Can I include selling costs?

Some legal, agent and improvement costs may form part of the cost base. Confirm the treatment of each cost before lodging a return.

Does this cover a main residence exemption?

No. Main residence and partial exemption rules need a more detailed calculation.

Conclusion

Use this estimate to understand the main CGT steps, then confirm the cost base, discounts and losses with a registered tax agent or the ATO.