How does the principal residence exemption work in Canada?

The principal residence exemption (PRE) allows Canadian homeowners to sell their primary home completely tax-free, sheltering the capital gain from taxation. This is one of the most valuable tax benefits available to Canadians.

Qualifying conditions:

A property qualifies as your principal residence for a given year if:

• It is a housing unit you own (house, condo, cottage, mobile home, or even a houseboat).
• You, your spouse or common-law partner, or your children ordinarily inhabited the property at some time during the year.
• You designate it as your principal residence for that year.

The formula:

The exempt portion of your capital gain is calculated as:

(1 + number of years designated) / number of years owned x capital gain

The "1+" in the formula provides a bonus year, which helps when you transition between homes in the same year.

Key rules:

• A family unit (you, your spouse, and minor children) can only designate one property as a principal residence for any given year.
• You must report the sale on Schedule 3 and complete Form T2091 to claim the exemption, even if the gain is fully exempt.
• Failure to report the sale can result in the CRA denying the exemption.
• The land claimed cannot exceed half a hectare (approximately 1.24 acres) unless the excess land is necessary for the use and enjoyment of the home.

Common situations:

• If you own both a city home and a cottage, you must decide which property to designate as your principal residence for each year. Generally, designate the property with the larger annual gain to maximize the exemption.
• If you convert your home to a rental property (or vice versa), special rules under section 45(2) or 45(3) may apply.