Hi Mick,
You are right, tax is paid on 50% of the actual gain, which is the total gain less costs.
The percentage of tax paid on half the actual gain is 25%.
So you could say that CGT in Canada is 12.5%, becuase 25% on 50% of the gain, is equal to 12.5% on 100% of the gain.
Liam Bailey
Head of international research
David Stanley Redfern Ltd