Principal Residence Exemption in Canada: When You Lose It (2026)
The principal residence exemption makes your home’s gain tax-free, but only for designated years, one home per family. Change of use, rentals and flipping.
The gain on a home you ordinarily inhabit is exempt from tax for each year you designate it as your principal residence. The exemption is lost or reduced when: you rent the property out and do not elect otherwise; you own two homes and can only designate one per year; you sell within a year of buying (the flipping rule); you fail to report the sale; or the land exceeds half a hectare without a reason. The exempt portion is (years designated + 1) ÷ years owned, the "plus one" that covers the year you move.
Figures come from the CostToClose capital gains calculator.
The formula
Exempt gain = total gain × (years designated as principal residence + 1) ÷ years owned.
A home owned 10 years, designated for 7, sold with a $300,000 gain: exempt portion 8 ÷ 10 = 80%; $60,000 is a capital gain, $30,000 taxable.
The five ways the exemption shrinks
1. Change of use. Moving out and renting the home is a deemed disposition at fair market value on the day of the change. You can file a subsection 45(2) election to keep designating it as your principal residence for up to four more years while renting it, provided you do not claim CCA and do not designate another home. Moving into a rental you own is the reverse (45(3) election). Details in Change of use: moving into a rental.
2. Two homes. A family unit (you, your spouse, and children under 18) can designate only one property per year. A cottage and a city home are both eligible in principle, but the years must be split. Most families designate the property with the larger gain per year of ownership.
3. The flipping rule. Sold within 365 days of purchase, the profit is business income with no exemption, unless a life-event exception applies.
4. Not reporting. Since 2016 you must report every sale of a principal residence on Schedule 3 and file Form T2091. Missing it can cost the exemption; CRA allows late filing with a penalty of $100 a month, up to $8,000.
5. Excess land. The exemption covers the home and up to half a hectare of land. More is exempt only if you show it was necessary for the use and enjoyment of the home (for example, minimum lot size under zoning).
Worked example from the calculator
A couple bought a Halifax house in 2016 for $380,000, lived in it until 2021, then rented it while living in a new home they bought and designated, and sold it in 2026 for $720,000 with $40,000 of selling costs.
| Item | Amount |
|---|---|
| Gain | $300,000 |
| Years owned | 11 (2016–2026 inclusive) |
| Years designated | 6 (2016–2021) |
| Exempt fraction (6 + 1) ÷ 11 | 63.6% |
| Exempt gain | $190,909 |
| Capital gain | $109,091 |
| Taxable (50%) | $54,545 |
| Tax at 43% marginal | ≈ $23,500 |
Had they filed the 45(2) election in 2021 and not designated the new home for 2022–2025, the rental years would have stayed exempt on this property, but the new home's gain would then be taxable for those years. Which is better depends on which property gained more. Reproduce this.
What changes the number
- Which property you designate in overlap years.
- Elections filed on time (45(2) and 45(3)) when use changes.
- Selling costs and improvements, which reduce the gain before the fraction is applied.
- Non-residency. Years you were not resident in Canada do not count as designated years.
Frequently asked questions
Do I pay tax when I sell my principal residence in Canada?
No, for years it was designated as your principal residence. You must still report the sale on your tax return and file Form T2091.
Can a cottage be a principal residence?
Yes, if you ordinarily inhabit it, even seasonally. But a family can designate only one property per year, so cottage years and city-home years must be split.
What happens if I rent out my house?
The change of use is a deemed sale at fair market value. A subsection 45(2) election lets you keep the exemption for up to four years of renting if you do not claim CCA or designate another home.
What is the plus-one rule?
The exempt fraction is (designated years + 1) ÷ years owned. The extra year covers the year you sell one home and buy another, so you are not taxed for owning two homes in one calendar year.
What if I forgot to report the sale of my home?
File Form T2091 late. CRA can charge $100 per month late, up to $8,000, and in principle can deny the exemption if the sale is never reported.
Sources
- Canada Revenue Agency, Principal residence and other real estate — checked 14 Sept 2026
- Canada Revenue Agency, Income Tax Folio S1-F3-C2, Principal Residence — checked 14 Sept 2026
- Canada Revenue Agency, Changes in use of property (subsections 45(2) and 45(3)) — checked 14 Sept 2026
- Canada Revenue Agency, Residential property flipping rule — checked 14 Sept 2026
This is general information for Canadian home buyers and sellers, checked against the sources listed above on the date shown. It does not constitute legal, tax, or mortgage advice. Because rules and rates change, confirm current figures with your lawyer or notary, your lender, or the government office that administers the tax before you rely on them.