Estimate the tax on a capital gain. In Australia the net capital gain is added to your income and taxed at your marginal rate — with a 50% discount for assets held over 12 months.
Australia does not have a standalone capital gains tax. Instead, your net capital gain for the year is added to your assessable income and taxed at your marginal rate. So the tax you pay depends on your other income: a gain that pushes you into a higher bracket is taxed at that higher rate, and the 2% Medicare levy applies as well.
Individuals (and trusts) who have held an asset for more than 12 months get a 50% CGT discount — only half the gain is taxed. Capital losses, including those carried forward, are subtracted from gains before the discount is applied. Your main residence is generally exempt under the main residence exemption. Companies do not get the 50% discount.