How capital gains tax works
CGT applies to the gain — not the total sale proceeds. The gain is calculated as: Proceeds of sale minus Allowable cost (original purchase price plus any allowable acquisition costs). For example: if you bought shares for ₦20,000 and sold them for ₦35,000, the capital gain is ₦15,000. CGT would be applied to the ₦15,000 gain, not the full ₦35,000 proceeds. Allowable costs may include brokerage fees paid on acquisition, depending on the applicable rules.