HOW TO CALCULATE CAPITAL GAINS TAX IN CANADA
Updated: Jan 26, 2024

Capital gains tax in Canada is payable on 50% of your investment profits. This amount is added to your income for the year, and the amount of tax you need to pay depends on which income tax bracket you fall into.
Your capital gains are only realized when you sell an asset for more than you paid for it, which is when you actually generated income from it and the tax requirement is triggered. On the flip side, a capital loss is when you lose value on your investments. These losses can also be considered while calculating your tax return and could help reduce your tax payable.
But before you can calculate how much tax you owe, you must first know how much capital gains you've realized. Capital gains are the difference between how much you sell your investments for and how much you paid in total, including any expenses that came from buying and selling the shares. Here's the formula:
Proceeds of disposition - (Adjusted cost based + Expenses on disposition) = Capital gain
Definitions:
Proceeds of disposition: How much you made when you sold your shares.
Adjusted cost base: How much you bought the shares for originally, including any commissions, legal fees, and similar charges.
Expenses on disposition: Any brokerage fees you had to pay for selling shares.
This is pretty simple, but since not every share you buy will have the same commission fees, it can get complicated to account for ACBs once you go to sell your shares. This is when getting an average ACB is helpful.
If you're feeling overwhelmed and uncertain if you need to pay capital gains taxes or not, it's best to discuss your particular situation with a credible accountant or financial advisor. That said, it's helpful for any investor to have a good foundation on how capital gains tax works in Canada.
But before you can calculate how much tax you owe, you must first know how much capital gains you've realized. Capital gains are the difference between how much you sell your investments for and how much you paid in total, including any expenses that came from buying and selling the shares.
Formula:
Proceeds of disposition - (Adjusted cost based + Expenses on disposition) = Capital gain
And here's the definitions of your terms:
Proceeds of disposition: How much you made when you sold your shares.
Adjusted cost base: How much you bought the shares for originally, including any commissions, legal fees, and similar charges.
Expenses on disposition: Any brokerage fees you had to pay for selling shares.
This is pretty simple, but since not every share you buy will have the same commission fees, it can get complicated to account for ACBs once you go to sell your shares. This is when getting an average ACB is helpful.
Once you know how much capital gains you've realized, you can move on to calculating the tax. Take 50% of your capital gains (called the "inclusion rate") and add it to your total income for that year. You then apply your personal tax rate to this amount and will find an estimate of how much you owe.
Basic formula for calculating capital gains is the following:
Capital gains x (50% Inclusion rate) x (Your personal tax rate) = Capital gains owed
Your personal tax rate depends on which income tax bracket you fall into, which is decided by how much income you make from other sources. Just keep in mind that there will be plenty of other factors that will contribute to how much tax you ultimately have to pay, including other tax deductions, credits, and so on.
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