Principal Residence vs Rental Property: The Tax Tradeoff
The inclusion rate on capital gains for individuals remains one half. A proposal to raise it was cancelled, which is the position this site's tax glossary already records. Half of a rental's gain is still income. None of a properly designated principal-residence gain is. That gap is the whole tradeoff. Cash flow, tenants, and leverage sit on top of it. They do not replace it. If you are comparing a REIT instead of a second building, use the REIT versus direct ownership guide. If you are about to buy several doors, the breakage points are the multi-property math guide.
Since 1982 a family unit designates one property per year. You do not file the designation every year as you go. You designate when you sell, or when a deemed disposition forces the question, on Form T2091. The formula includes a "plus one" year, which is why a transition year can shelter two properties. It is not a second full exemption. Couples do not each get a free house.
What the exemption actually requires
The property generally has to be a housing unit you, your spouse, or your child ordinarily inhabited in the year. A cottage you use, and a city home you use, can both qualify in the abstract. Only one of them gets the designation for that year. The years you do not designate are exposed. People who "save the exemption for the bigger gain" are making a real allocation. Guessing at death, when both properties are deemed disposed of, is how families discover the second property was taxable the whole time.
Ordinarily inhabited is a facts test. A home you live in qualifies. A home you bought, never occupied, and rented immediately is a rental, and it should be reported as one. The housing decisions in retirement guide picks up the later version of this choice: downsizing, the city home versus the cottage, and what you actually want to live in when the exemption is no longer the only goal.
Changing your mind is a deemed sale
| Change | Default tax result | The election that can delay it |
|---|---|---|
| You move out and rent the whole place | A change in use. You are deemed to have sold the property at fair market value and reacquired it as a rental. A gain can be sheltered by the principal residence exemption for the years it qualifies. The new cost base for the rental period is that fair market value. | Subsection 45(2). You elect to be deemed not to have changed use. You can keep designating the property as a principal residence for up to four further years, longer in some employment-relocation cases. You must not claim capital cost allowance if you want the exemption for those years. You still report the rent. File the election with the return for the year of the change. |
| A rental becomes your home | Another change in use. Deemed sale at fair market value. The gain during the rental years is taxable. Recapture of capital cost allowance, if you claimed it, is fully included. | Subsection 45(3) can defer that deemed gain until you actually sell, if you did not claim capital cost allowance. The election is filed with the return for the year of the real sale, not the year you moved in. Late-filing rules exist and are not something to improvise. |
| You rent a basement or a room and keep living there | It can be a partial change in use, which means a partial deemed disposition, if the rental is more than incidental. | CRA's administrative practice has been that a partial change can be ignored where the income-producing use is ancillary, you do not make structural changes, and you do not claim capital cost allowance. Claim depreciation and you should expect to lose the exemption on that portion. This is an administrative position. If the suite is a separate business, do not pretend it is ancillary. |
Class 1 depreciation on the building, not the land, shelters rental income today. On sale, recapture brings those claims back into income in full, up to the original cost, and it is not a capital gain. A principal residence designation and a CCA claim do not peacefully coexist on the same years. If the exemption is worth more than the annual shelter, do not claim CCA. If the property will be a rental for decades and the exemption is already gone, CCA is a timing choice you run with your accountant, not a default on the tax software's checkbox.
Income, interest, and which debt is deductible
Net rental income is fully taxable. You report it on Form T776. Mortgage interest, property tax, insurance, repairs, and management are deductible to the extent they were incurred to earn rent. Your residence mortgage interest is not deductible. You cannot fix that by "allocating" a personal mortgage to the rental in your head. The borrowed money has to trace to the rental. The structures that do this honestly are in the HELOC guide.
A cash-flowing rental in a high bracket can lose to a principal residence that cash-flows nothing and then sells exempt. Run both futures. The rental's annual tax is a certainty if there is net income. The residence's tax on sale is zero if the designation holds. Appreciation is not guaranteed in either column. The tax treatment is the part you can know.
You buy for $700,000. A decade later the fair value is $1,000,000. If the property was your principal residence for every year you owned it, plus the formula's extra year where it applies, the $300,000 gain can be fully sheltered. If it was a rental the entire time, and you claim no principal-residence years, half of the $300,000 is a taxable capital gain: $150,000 included in income in the year of sale. At an illustrative 43 percent marginal rate, the tax on that inclusion is about $64,500, before any recapture and before provincial differences. Use your own bracket from the provincial rates guide. If you had claimed $40,000 of capital cost allowance, that recapture is included in full on top of the taxable gain. The building did the same economic thing. The designation did the tax.
Provinces publish annual rent-increase guidelines, and some cities add vacancy taxes if a unit sits empty. Ontario's rent-control history includes an exemption for many units first occupied after 15 November 2018. That date is statutory and it is exactly the sort of date a government can revise. Budget the guideline that applies to your unit, not last year's asking rent, and confirm whether a vacant-home tax applies before you leave a condo empty between tenants. A tax-perfect rental that cannot raise rent and cannot stay filled is still a bad asset.
A decision rule for the next property
- If you will live in it and it is likely to be your biggest gain, keep it personal, ordinarily inhabited, and out of a corporation. A corporation cannot claim the principal residence exemption. That mistake is priced in the incorporation guide.
- If you leave and rent it out, decide in the year of the move whether a 45(2) election is available and whether you are willing to skip CCA to keep up to four more designated years.
- If you already own a cottage and a city home, write down which years you intend to designate. Do it while both are still yours, not in the year of death.
- If you want rental cash flow, buy the rental as a rental, with a cost base you can prove, and do not move your own residence into a half-documented grey zone to "try landlording."
- If the gain on a future sale would be painful at your bracket, compare that pain with a REIT held in a TFSA, where the appreciation is not a personal capital gain. Different risks, different liquidity, no tenants.
Life events scramble this. A marriage combines family units. A separation can change who designates what. A death is a deemed disposition. The life events guide is the checklist. The designation is not something your executor should be inventing from a utility bill.
Key takeaways
- The principal residence exemption is a zero rate on a designated gain. A rental's gain is half included, and recapture is fully included.
- One property per family per year. The plus-one year is a transition, not a second house.
- Moving out and renting is a deemed sale unless a 45(2) election is filed and its conditions, including no CCA, are kept.
- A basement suite can stay inside the exemption only while the rental use is ancillary and you do not claim depreciation. That is a narrow path.
- Residence mortgage interest is not deductible. Rental interest is, if the borrowed money actually paid for the rental.
- Do not put a future principal residence in a corporation and expect the exemption to follow.
The exemption is claimed on a return, not at the kitchen table.
Designations, rental filings, and recapture sit next to the rest of your income. The 2026 tax guide is the return this decision lands on.
Get the 2026 Tax Guide — $49 CAD
