Do I still get the principal residence exemption after leaving Canada?

Partly, and the way it erodes catches people out. Leaving Canada doesn’t cancel the principal residence exemption, and the departure rules don’t trigger it either. What happens is quieter: the exemption becomes a fraction, and the years you spend outside Canada sit in the bottom of that fraction without ever appearing in the top. Hold the house long enough as a non-resident and a formula that once sheltered the whole gain shelters a shrinking slice of it. The one loud year is the year you turn the whole house into a rental, because that complete change of use is a deemed disposition unless you elect out of it.

Is my Canadian home taxed when I leave?

Not by the departure rules. Emigration triggers a deemed disposition of most of what you own, but Canadian real property is expressly carved out of it, so the move itself reports no gain on the house and settles nothing about the exemption. A different rule can bite in the same year. If you rent the whole house out, ITA 45(1)(a) treats that complete change of use as a disposition at fair market value unless you elect out under ITA 45(2), and it keys to the change of use rather than to the move.

“the taxpayer is deemed to have disposed … of each property owned by the taxpayer other than, if the taxpayer is an individual, (i) real or immovable property situated in Canada, a Canadian resource property or a timber resource property” ITA 128.1(4)(b)

That carve-out is usually described as good news, and in cash-flow terms it is. The consequence is that the property stays inside the Canadian system with its history intact, and the question gets settled later under a formula that has been quietly counting your non-resident years in the meantime. Whether it gets settled once, on the sale, or twice, on a change of use and then the sale, depends on what you do with the house after you go.

How is the exempt portion actually calculated?

By a formula rather than a yes or no. ITA 40(2)(b) starts with the gain you would otherwise have and then subtracts a proportion of it, and the proportion is a ratio of years. The exemption is whatever that subtraction removes.

“the taxpayer’s gain for a taxation year from the disposition of a property that was the taxpayer’s principal residence at any time after the date (in this section referred to as the “acquisition date”) that is the later of December 31, 1971 and the day on which the taxpayer last acquired or reacquired it … is the amount determined by the formula A - (A × B/C) - D” ITA 40(2)(b)

A is the gain worked out in the ordinary way. B and C are both year counts, and D is an adjustment tied to a 1994 election that is zero in most modern files. Everything interesting for someone who has left Canada happens in the difference between how B is counted and how C is counted.

Why do the years after I leave reduce the exemption?

Because residence is a condition of the numerator and not of the denominator. B is one plus the taxation years for which the property was your principal residence and during which you were resident in Canada, the plus one itself conditional on residence in the year of your acquisition date. C is every taxation year of ownership, with no residence condition at all. Both count only years that end after that date. So a year abroad enlarges C and leaves B alone, and the acquisition date is the hinge: move it forward and both counts restart from it.

“B is (i) if the taxpayer was resident in Canada during the year that includes the acquisition date, one plus the number of taxation years that end after the acquisition date for which the property is the taxpayer’s principal residence and during which the taxpayer was resident in Canada … C is the number of taxation years that end after the acquisition date during which the taxpayer owned the property whether jointly with another person or otherwise” ITA 40(2)(b)

Put numbers on it. Own the house for twenty taxation years with your acquisition date untouched, the first eight of them years you were resident in Canada with the property designated, and B is those eight plus one, so nine, while C reaches twenty. Nine twentieths of the gain is sheltered and the rest is taxable. Nothing went wrong and no deadline was missed. The formula simply did what it says.

What happens if I rent the house out after I leave?

That is a change of use. Convert the whole home to an income-producing use (the NR6 and Section 216 filing covers the rental mechanics) and ITA 45(1)(a) deems a disposition and reacquisition at fair market value, though CRA spares an ancillary rental with no structural change and no capital cost allowance claimed. The reacquisition moves your acquisition date, so B and C both restart. You can elect out under ITA 45(2) with the return for the year the use changed. Filing late is possible but discretionary, and carries a penalty.

“where a taxpayer, (i) having acquired property for some other purpose, has commenced at a later time to use it for the purpose of gaining or producing income … the taxpayer shall be deemed to have (iii) disposed of it at that later time for proceeds equal to its fair market value at that later time, and (iv) immediately thereafter reacquired it at a cost equal to that fair market value” ITA 45(1)(a)

Leaving Canada does not put you outside this. ITA 45(1)(d) says that for a non-resident taxpayer the reference to gaining or producing income is read as income from a source in Canada, so the test still runs, on a Canadian-source measure. CRA sets out both the deemed disposition and the way out of it.

“If a taxpayer has completely converted his or her principal residence to an income-producing use, he or she is deemed by paragraph 45(1)(a) to have disposed of the property (both land and building) at fair market value and reacquired it immediately thereafter at the same amount. Any gain otherwise determined on this deemed disposition may be eliminated or reduced by the principal residence exemption. The taxpayer may instead, however, defer recognition of any gain to a later year by electing under subsection 45(2) to be deemed not to have made the change in use of the property. This election is made by means of a letter to that effect signed by the taxpayer and filed with the income tax return for the year in which the change in use occurred.” CRA, Income Tax Folio S1-F3-C2, 2.48

Two paths, then. Elect, and the acquisition date stays put for as long as the election stands, which means for as long as no capital cost allowance is claimed on the property, so the numerator you built as a resident keeps working against a long denominator. Don’t elect, and the gain to the conversion date is settled in that year, where the exemption can still cover it, while everything after runs on a fresh acquisition date, which shortens B and C alike. Since the 2016 tax year CRA requires basic information about a disposition of a principal residence on the return, so the unelected path reports in the conversion year, and the elected path files the election there. Either way that year is not a silent one.

Three limits sit in the same folio. The first is that the deemed disposition is for a complete conversion. Where the income-producing use is ancillary to the main use of the property as a residence, there is no structural change and no capital cost allowance is claimed, CRA’s practice is to treat the whole property as keeping its character, and renting out a room is CRA’s own example of that. The second is that if the year of the change has already gone by, the door is not necessarily shut, though it is not a door you simply walk through. ITA 220(3.2) with Regulation 600 gives CRA the authority to accept a late-filed ITA 45(2) election, and the application runs out ten calendar years after the end of that taxation year. The route is discretionary and it is not free. ITA 220(3.5) makes an accepted late election carry a penalty, the lesser of $8,000 and $100 for each complete month since the election was due, and CRA’s policy in Information Circular IC07-1R1 is not to accept the election or process the adjustment until that penalty is paid. The circumstances CRA will accept are set out in the same circular, and CRA refuses a request it reads as made for retroactive tax planning. A late election is one to take advice on rather than to file.

The third is that an election in force can come out of force. Rescind it in a later tax year and you are deemed to have disposed of the property and reacquired it at fair market value on the first day of that year, with the same consequences the change of use would have had. Claiming capital cost allowance on the property is itself treated as a rescission, from the first day of the year the claim is made. That puts the deemed disposition and the new acquisition date back, so an election holds your acquisition date where it was only for as long as no claim is made.

“If the taxpayer rescinds the election in a subsequent tax year, he or she is deemed to have disposed of and reacquired the property at fair market value on the first day of that subsequent tax year (with the above-mentioned tax consequences). If CCA is claimed on the property, the election is considered to be rescinded on the first day of the year in which that claim is made.” CRA, Income Tax Folio S1-F3-C2, 2.48

Do I lose the plus-one year?

You lose it if you weren’t resident in Canada at any time in the taxation year that includes your acquisition date. The extra year in B is conditional. It appears in the first branch of the definition, which applies where you were resident in Canada during that year, and the second branch, which covers everyone else, has no plus one in it. Watch which year the test runs on, because a deemed reacquisition moves the acquisition date and can move this test with it.

Your situation	Effect on the exemption
Resident in Canada at any time in the taxation year that includes your acquisition date	The plus-one year is available in B
Not resident in Canada at any time in that year, whether you bought then or were deemed to reacquire then	No plus-one year in B
Years after your acquisition date when you were resident in Canada with the property designated	Count in both B and C
Years after you emigrate, still owning the property	Count in C only
Resident in Canada throughout, from the acquisition date to the sale	The residence condition in B does not bite
Non-resident for part of the period and resident again by the time you sell	Those non-resident years still sit in C and not in B
Converted completely to a rental with no ITA 45(2) election on file	The deemed reacquisition moves your acquisition date, so B and C both restart from it
Converted completely to a rental with the ITA 45(2) election filed, and capital cost allowance then claimed	CRA treats the election as rescinded from the first day of the year of the claim, so your acquisition date moves to that day and B and C both restart from it
Rented out only as an ancillary use, no structural change and no capital cost allowance claimed	CRA’s practice is no deemed disposition, so your acquisition date does not move and neither count restarts

The plus-one year is small in a long holding period and decisive in a short one. Somebody who buys as a non-resident, becomes resident for two years and sells has a materially different answer from somebody who did the same two years having bought while resident.

What’s Form T2091(IND) for?

Designating and calculating. It is where you name the property as your principal residence for particular years and where the year counts turn into a number, which is why the residence condition in B stops being abstract at exactly the point you fill it in.

“T2091IND Designation of a Property as a Principal Residence by an Individual (Other Than a Personal Trust) … Form used by individuals to designate a property as a principal residence and to calculate the capital gain for the year.” CRA, Form T2091(IND)

• Canadian departure tax and Forms T1161 and T1243, which covers what departure does catch
• How to defer Canadian departure tax on Form T1244, for the property that is caught
• Whether you are still a Canadian tax resident, because the residence half of B turns on this
• Principal residence exemption across the border, how the Canadian PRE and US section 121 exclusion interact when you sell after a cross-border move

Being clear about what this page does not claim. It doesn’t define what makes a property a principal residence, which lives in ITA 54 and is not sourced here. It does not address the separate rules that apply on a sale of Canadian real property by a non-resident, the designation limits where more than one property is involved, or how the US would tax the same gain. On change of use it sources the complete conversion, the ancillary-use exception, the ITA 45(2) election, the late-filed route and what rescinds an election already in force, and stops there, so how capital cost allowance is itself taxed, the substantial partial change that does trigger a deemed disposition on part of the property, the particular circumstances in which CRA will and will not accept a late election, and designating years you did not live there are outside it. It also makes no claim that any particular year in your own history counts or doesn’t count.

What should I do next?

Fix your acquisition date first, then count your years. Write down the date you acquired the property or were deemed to reacquire it, then count only taxation years that end after that date: on top, your Canadian-resident designated years, plus one if that date fell in a resident year; below, every year of ownership. That ratio is the exemption on those facts. Both counts run from that one date, so anything that moved it, a complete rental conversion above all, moved them together. If the fraction is heading somewhere you don’t like, timing the sale is the lever you actually control.

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.