When you take CCA on an asset and then sell/dispose of it, the amount is taken out of the UCC for the class. That's how it's recorded and carried forward.
It's not like capital gains/losses where your loss or gain is based off of the original value of the asset. Instead it's based on the remaining value of all the assets in the class after however many years you have been taking CCA on it. For example, if you have a UCC of $50,000, and you sell a property for $1000, if you have no other additions or dispositions, and you don't take CCA for the year, your end UCC will be $49,000. You don't get a terminal loss, but you have already claimed depreciation for property before you sold it.
