A Canada capital gains tax calculator for working out what you owe the CRA when you sell shares, property or other assets at a profit. Canada’s system is distinctive: it has no separate capital gains tax rate. Instead, only 50% of your gain (the inclusion rate) is added to your ordinary income and taxed at your marginal rate. This tool applies that rule, factors in the principal residence and lifetime capital gains exemptions, and shows the tax due and your net proceeds.
How it works
The calculation runs in three steps. First it finds the raw gain: sale proceeds (minus selling costs) less your adjusted cost base — what you originally paid plus eligible expenses. Second it applies any exemption: a principal residence is fully exempt, and qualified small-business shares draw down your Lifetime Capital Gains Exemption (LCGE). Third it includes half the remaining gain in income and taxes it at your marginal rate.
gain = proceeds − sellingCosts − adjustedCostBase
taxableGain = max(0, gain − exemption) × 0.50 (50% inclusion rate)
tax = taxableGain × marginalRate
Because only half the gain is taxed, the effective rate on the whole gain is roughly half your marginal rate — a long-standing feature that makes capital gains more lightly taxed than salary in Canada.
Example and notes
Suppose you bought shares for $30,000 and sold them for $50,000, with $500 in commissions, while your marginal rate is 40%. The gain is $19,500; the included amount is $9,750; the tax is about $3,900, leaving net proceeds of roughly $45,600. Switch the asset type to principal residence and the taxable gain drops to zero.
Notes: a capital loss can offset capital gains in the same year or be carried back three years or forward indefinitely. The inclusion rate has historically been 50% but is set by federal policy and can change. This is an estimate — confirm your exact rate and exemption with the CRA or an accountant. All figures stay in your browser.