The total cost of this purchase is $1,000 (50 shares x $20). This becomes your cost basis. A few years later, you decide to sell all 50 shares when the price has risen to $30 per share.

To calculate a capital gain or loss, you must know your investment’s ACB. Here’s the formula for adjusted cost base. This article is 1 year old. Some details may be outdated. Calculating your ...