Seriously? You would be liable for CGT on the profit on those...

Seriously?

You would be liable for CGT on the profit on those shares you sold. The sale of those shares is the CGT event.

Profit on Sale = 50,000 shares x (.20 - .08) = $6,000

No CGT discount is available since the shares sold were held for under 12 months.

Accordingly, the full profit on sale of $6,000 is a capital gain that must be included in your taxable income in the tax year that you sold them.

The actual amount of tax you pay on that will depend on your total taxable income, and will be $6,000 x personal tax rate..... plus Medicare Levy. So if you are on the top marginal tax rate of 49% (incl Medicare and Budget Repair levy), the capital gains of $6,000 will add $2,940 to your tax payable.