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Illustration of a Canadian home transitioning between owner-occupied and rental use, with tax documents and financial planning elements representing the Section 45(2) election for principal residences.

Published: March 17, 2020

Last Updated: July 6, 2026

Converting your home into a rental property can trigger an unexpected tax bill—even if you never sell it.

Under Canada’s Income Tax Act, changing the use of a property from a principal residence to an income-producing rental (or vice versa) can result in a deemed disposition, meaning the CRA treats the property as though it were sold at fair market value. Without proper planning, this can create a significant capital gains tax liability despite no money changing hands.

Fortunately, the section 45(2) election allows many Canadian homeowners to defer that deemed disposition and, in some cases, continue claiming the principal residence exemption for up to four additional years. However, strict filing requirements apply, and claiming capital cost allowance (CCA) can jeopardize these valuable tax benefits.

In this guide, David J. Rotfleisch, Certified Specialist in Taxation and founding tax lawyer at Rotfleisch & Samulovitch P.C., explains how the section 45(2) election works, when it should be used, common mistakes to avoid, and how recent legislative changes—including the 2019 expansion for partial changes in use and the 2023 residential property flipping rules—affect Canadian homeowners considering converting a principal residence into a rental property or moving back into a former rental home.

Section 45(2) Election: At a Glance

  • A change in use can trigger tax without a sale. Converting a principal residence into a rental property generally creates a deemed disposition at fair market value.
  • The section 45(2) election can defer that tax. Filing the election prevents the deemed disposition from occurring when the property’s use changes.
  • You may preserve your principal residence exemption. Eligible taxpayers can continue designating the property as their principal residence for up to four additional years after moving out.
  • Do not claim Capital Cost Allowance (CCA). Claiming CCA on the property generally prevents you from using the section 45(2) election for those years.
  • The election has filing requirements. It is generally made by submitting a signed letter with your tax return for the year the use change occurs.
  • The rules also apply to partial conversions. Since 2019, the election can apply when only part of a home—such as a basement apartment—is converted to rental use.
  • Selling within one year may trigger the flipping rules. The residential property flipping rules can override the principal residence exemption in certain situations.
  • Professional tax advice can prevent costly mistakes. Missing an election or making the wrong planning decision can result in significant and often avoidable capital gains tax.

Deemed Disposition on Change of Use: Section 45(1) of the Income Tax Act

Section 45(1) of the Income Tax Act (the “Tax Act”) deems a disposition of a property at fair market value when a taxpayer changes the use of that property. A change of use occurs when a taxpayer begins using a property for a purpose that differs from its prior use, most commonly by converting a personal-use home into an income-producing rental property, or the reverse.

Two common scenarios illustrate the rule:

  • A taxpayer who has been living in a home and begins renting it to tenants is deemed to have disposed of and reacquired that property at fair market value on the date the use changes. Any accrued gain up to that point may be sheltered by the principal residence exemption.
  • A taxpayer who has been renting out a property and moves back in, converting the rental to a personal residence, is again deemed to have disposed of and reacquired the property at fair market value. Any accrued gain from the rental period is included in income for that year.

The second scenario presents a particular cash-flow problem. The deemed disposition occurs without a sale, so the taxpayer receives no proceeds from which to pay the capital gains tax. A homeowner who moves back into a long-rented property may face a substantial tax bill with no obvious source of funds to pay it. The section 45(2) election is specifically designed to address this problem.

The Section 45(2) Election: Converting a Principal Residence to a Rental Property

Section 45(2) of the Tax Act allows a taxpayer to elect, in their income tax return for the year the change in use occurs, to be deemed not to have begun using the property for commercial or business purposes. 

The effect is that the section 45(1) deemed disposition does not occur. The taxpayer’s adjusted cost base (“ACB”) does not change, and no capital gains tax is payable at the time of conversion.

Key features and requirements of the section 45(2) election include the following:

  • The election is made by attaching a signed letter to the taxpayer’s income tax return for the year of the change of use, describing the property and stating that the taxpayer elects under subsection 45(2) of the Tax Act.
  • Once made, the election remains in force indefinitely, until the taxpayer either rescinds it or sells the property.
  • While the election is in force, the taxpayer may designate the property as a principal residence for up to four additional years beyond the last year of actual personal use, even if the taxpayer does not reside there during those years.
  • The four-year extension is unavailable if the taxpayer or their spouse has claimed a section 45(2) election on another property in respect of a change of use occurring after 1981. Only one absent principal residence designation at a time is permitted.
  • The taxpayer must continue to report net rental or business income earned from the property while the election is in force.
  • The taxpayer may not claim capital cost allowance (“CCA”) on the property while the section 45(2) election is in force. Claiming CCA disqualifies the election for those years.

“The section 45(2) election is one of the most underused tools in Canadian tax planning. As a Certified Specialist in Taxation, I regularly see situations where a taxpayer has converted their home to a rental property, failed to file the election, and then found themselves facing a significant and entirely avoidable capital gains liability when they move back in years later. Filing the election on time costs nothing and preserves enormous flexibility.” 

— David J. Rotfleisch, Certified Specialist in Taxation

 

Pro Tax Tip: The section 45(2) election is particularly valuable for taxpayers who convert their home to a rental while temporarily working in another city or country. The four-year extension for principal residence designation can fully shelter the gain that accrues during the absence, provided the taxpayer returns to the property before the extension expires and does not claim CCA.

The Section 45(3) Election: Converting a Rental Property to a Principal Residence

Section 45(3) of the Tax Act mirrors the section 45(2) election but operates in the opposite direction. It is available where a taxpayer converts a rental property or other income-producing property to a principal residence.

The election allows the taxpayer to be deemed not to have changed the use of the property at the time of conversion, deferring any capital gains arising from the rental period until the property is actually sold.

See also
Wall v Canada, 2021 FCA 132 – Guidance from a Canadian tax lawyer on taxation of house flipping

Under section 45(3):

  • The deemed disposition under section 45(1) is deferred to the time the property is actually sold or otherwise disposed of.
  • The taxpayer may designate the property as their principal residence for up to four years before it was actually occupied as such, provided the taxpayer was a Canadian resident during those years.
  • The election is made by filing a signed letter with the taxpayer’s income tax return for the year of the actual disposition of the property.
  • If the taxpayer claimed CCA on the property during the rental period, the CCA recapture rules in section 13 will still apply on the actual disposition, even if the section 45(3) election shelters the capital gain.

Section 45(2) vs. Section 45(3): Quick Reference for Canadian Homeowners

 

Feature Section 45(2) Section 45(3)
Applies when Personal residence converted to rental Rental property converted to principal residence
Election timing Filed with T1 return for year of change in use Filed with T1 return for year of actual sale
Effect Deemed disposition under s.45(1) does not occur Defers deemed disposition to year of actual sale
PRE extension Up to 4 additional years after last occupancy Up to 4 prior years before actual occupancy
CCA restriction Cannot claim CCA while election in force CCA recapture still applies on disposition
Partial change of use Available since March 19, 2019 Available since March 19, 2019

 

 Figure 1: Change-in-Use Election Decision Guide

Figure 1: Use this decision guide to determine which election applies to your change-in-use scenario. Click any node in the online version for detailed guidance. Purple = decision point; teal = action required; green = outcome; amber = caution; coral = risk or blocker.

The Four-Year Principal Residence Extension: How It Works in Practice

The most significant planning benefit of the section 45(2) election is the ability to continue designating the converted property as a principal residence for up to four additional years after the change in use. 

Under the Income Tax Act, the principal residence exemption formula is: 

((number of years designated + 1) divided by total years owned) multiplied by the capital gain. The “+1” year is built into the formula to accommodate a change-in-year scenario, but the four-year extension goes significantly further.

Example: Maya purchases a Toronto condo in January 2018 for $600,000. She lives in it until December 2021 (four years of actual occupancy) and then rents it out from January 2022. 

In December 2026, she sells it for $900,000, a $300,000 capital gain over nine years of ownership. She files a section 45(2) election. She designates the condo as her principal residence from 2018 to 2026, being nine years: four years of actual residence, four years of the permitted extension, and the sale year. 

The PRE formula yields: ((9 + 1) divided by 9) multiplied by $300,000 = $333,333, which exceeds the actual gain, so the entire $300,000 is sheltered. Without the election, the gain accrued during the rental years 2022 to 2026 would be fully taxable.

Capital Cost Allowance and the Section 45(2) Election: The Critical Restriction

Taxpayers who claim CCA on a rental property cannot use the section 45(2) election to shelter the gain from those rental years. This restriction flows from the definition of “principal residence” in section 54 of the Tax Act: a property does not qualify as a principal residence for any year in which the taxpayer claimed CCA in respect of that property.

The CCA restriction has two practical consequences:

  • A taxpayer who claimed CCA during the rental period cannot elect under section 45(2) to shelter the gain accrued during those rental years.
  • A taxpayer who elects under section 45(2) must not claim CCA on the property while the election remains in force. Claiming CCA after making the election will not retroactively invalidate it for prior years, but it will prevent the taxpayer from designating those CCA years as principal residence years.

Pro Tax Tip: Landlords who believe they may eventually move back into a rental property, or who wish to preserve the section 45(2) election as an option, should carefully weigh the immediate tax benefit of claiming CCA against the potential cost of losing principal residence designation years. The decision depends on the property’s appreciation trajectory and the taxpayer’s marginal tax rate. An experienced Toronto tax lawyer can model both scenarios.

Partial Change of Use and the March 2019 Expansion of Section 45(2)

Prior to March 19, 2019, the section 45(2) election was only available where there was a complete change in use, such as a taxpayer moving entirely out of their home and renting the whole property. A partial change in use, such as converting a basement to a rental suite while continuing to occupy the remainder of the home, could trigger a deemed disposition on the rented portion, but no election was available to defer it.

Budget 2019, effective March 19, 2019, expanded the section 45(2) election to cover partial changes in use. The CRA’s position, confirmed in Income Tax Folio S1-F3-C2 at paragraph 2.60.1, is as follows:

  • Where a taxpayer converts part of their principal residence to rental or business use, for example by creating a self-contained basement apartment in a single-family home, a section 45(2) election may now be filed to defer the deemed disposition on the converted portion.
  • The election for a partial change in use is made in the same manner as a complete change: by signed letter filed with the T1 return for the year of the change.
  • If the election is later rescinded, the change in use is deemed to have commenced on the first day of the year of rescission.
  • The same CCA restriction applies: the taxpayer cannot claim CCA on the rental portion of the property while the section 45(2) election is in force.

Late-Filed Section 45(2) Elections: Relief Under Section 220(3)

Many taxpayers are unaware of the section 45(2) election until years after a change in use has occurred. Section 220(3) of the Tax Act grants the CRA discretionary authority to accept late-filed elections. The CRA’s administrative policy is generally to grant relief where the following conditions are met:

  • The taxpayer has not claimed CCA on the property during the period in question.
  • The election is accompanied by a written explanation of why it was not filed on time.
  • A late-filing penalty applies at the rate of $100 per month from the original due date to the date of the application, with a minimum of $100 and a maximum of $8,000, under subsection 220(3.5) of the Tax Act.

Taxpayers who converted their principal residence to a rental property and did not file a section 45(2) election at the time should contact an experienced Canadian tax lawyer to assess whether a late-filed election is feasible and advantageous in their circumstances. Where the CRA refuses a late-filed election and the resulting tax liability is significant, a voluntary disclosure application may also be worth considering as a complementary strategy.

The 2023 Residential Property Flipping Rule: Section 12(12) of the Income Tax Act

As of January 1, 2023, the federal government introduced the residential property flipping rule under section 12(12) of the Tax Act, enacted by Bill C-32, the Fall Economic Statement Implementation Act, 2022. 

See also
CRA Audit of Canadians' Real Estate Property Transactions in the US

This rule treats the full gain from the sale of a residential property as business income, not a capital gain, if the taxpayer has owned the property for fewer than 365 consecutive days before the sale.

 

“The residential property flipping rule has caught a number of taxpayers who assumed their section 45(2) election was sufficient protection. It is not. The flipping rule operates independently: if you have not held the property for 365 days, the full gain is business income and the principal residence exemption does not apply, regardless of whether you filed a section 45(2) election. The exceptions for life events are real but narrowly drawn. Always confirm your holding period before planning a sale.” 

— David J. Rotfleisch, Certified Specialist in Taxation

 

The residential property flipping rule interacts critically with the section 45(2) election and the principal residence exemption:

  • The principal residence exemption does not apply to income characterized as business income under section 12(12). Even if a taxpayer has filed a section 45(2) election, the flipping rule overrides the exemption if the 365-day holding period has not been satisfied.
  • Certain exceptions apply where the disposition arises from a life event: death or imminent death of the taxpayer or a related person; addition of a new household member through marriage, common-law partnership, or birth of a child; separation or divorce; threat to personal safety such as domestic violence; disability or serious illness; involuntary job loss; insolvency; or destruction of the property due to disaster.
  • The exceptions are construed narrowly. Taxpayers should not assume an exception applies without careful analysis of the specific facts.
  • The rule applies to properties sold on or after January 1, 2023, regardless of when they were purchased. A property purchased before 2023 and sold within 365 days after January 1, 2023 may be caught by the rule.

Non-Resident Obligations: Selling Canadian Real Estate After Leaving Canada

Canadian real estate is taxable Canadian property under section 248(1) of the Tax Act. Unlike most other capital property, real estate is not subject to the departure tax deemed disposition under section 128.1(4) when a taxpayer ceases to be a Canadian resident. The property remains on the taxpayer’s books at its original ACB and any section 45(2) election continues in force after emigration.

However, a taxpayer who emigrates and retains Canadian real estate faces a distinct set of obligations:

  • Non-residents who rent out Canadian real property are subject to Part XIII withholding tax under section 212 of the Tax Act. The default withholding rate is 25% of gross rental receipts, remitted monthly by the tenant or property manager.
  • A non-resident landlord may elect under section 216 of the Tax Act to file a Canadian income tax return and pay tax on net rental income at graduated rates, rather than the 25% gross withholding rate. This election typically produces a lower tax liability where the property has significant deductible expenses.
  • When a non-resident sells Canadian real property, the purchaser is required to withhold a portion of the purchase price (generally 25% of the gross proceeds, or 50% if the property was used in a business) under section 116 of the Tax Act, unless the non-resident seller has obtained a Certificate of Compliance from the CRA before or promptly after closing.
  • The principal residence exemption remains available to non-residents for the years the property qualified as the taxpayer’s principal residence, including any years covered by the section 45(2) election’s four-year extension, provided those years have not expired.

Pro Tax Tip: Non-residents planning to sell a former Canadian principal residence should apply for a section 116 Certificate of Compliance well in advance of closing. Failure to obtain the certificate results in the purchaser withholding a significant portion of the sale proceeds, which can create a cash-flow problem at closing even where the ultimate tax liability is small or nil due to the principal residence exemption.

Quebec Residents: Parallel Change-in-Use Rules Under the Quebec Taxation Act

Quebec residents are subject to a parallel income tax regime under the Quebec Taxation Act (the “QTA”), administered by Revenu Quebec. The QTA contains provisions that mirror the federal change-in-use rules, found at sections 281 to 283 of the QTA.

Practical points for Quebec residents:

  • A Quebec resident who converts their principal residence to a rental must file a section 45(2) election under the federal ITA and a corresponding election under section 282 of the QTA. Two separate signed letters are required, one to the CRA and one to Revenu Quebec.
  • The four-year principal residence extension and the CCA restriction apply under both the federal and Quebec regimes.
  • Quebec’s Form TP-274-V (Designation of Property as a Principal Residence) must be filed with the Quebec provincial return for the year of the sale, mirroring the federal T2091(IND) obligation.
  • Penalties for late-filed elections under the QTA are similar to the federal $100-per-month penalty structure, to a maximum of $8,000.

Quebec residents should not assume that filing the federal section 45(2) election automatically satisfies Quebec’s requirements. Separate filings are required. Failure to file the provincial election can result in a provincial deemed disposition and capital gains tax liability under the QTA, even if the federal election is properly filed.

Reporting Requirements: T1 Return and Form T2091(IND)

Since 2016, taxpayers are required to report the sale of a principal residence on their T1 income tax return in the year of sale, even if the full gain is sheltered by the principal residence exemption. The disposition must be reported on Schedule 3 (Capital Gains and Losses), and Form T2091(IND), Designation of a Property as a Principal Residence by an Individual, must be completed and filed.

Failure to report the disposition by the T1 filing deadline can result in:

  • A penalty of $100 per month, to a maximum of $8,000, under subsection 220(3.5) of the Tax Act.
  • Loss of the ability to claim the principal residence exemption for that year if the CRA does not accept a late designation.
  • A reassessment by the CRA to include the full capital gain in income.

 

“Change-in-use planning is not a set-and-forget exercise. The election needs to be filed on time, CCA decisions need to be made with the full picture in mind, and the four-year clock needs to be tracked annually. The taxpayers who get into trouble are almost always the ones who made good decisions at the start but then lost track of the planning over time. A seasoned Canadian tax lawyer should review the position every few years to make sure nothing has slipped.”

— David J. Rotfleisch, Certified Specialist in Taxation

Disclaimer:

"This article provides information of a general nature only. It is only current at the posting date. It is not updated and it may no longer be current. It does not provide legal advice nor can it or should it be relied upon. All tax situations are specific to their facts and will differ from the situations in the articles. If you have specific legal questions you should consult a lawyer."

Frequently Asked Questions About Principal Residences in Canada

A principal residence is a housing unit that you ordinarily inhabit during the year, such as a house, condominium, cottage, or certain leasehold interests. Simply owning a property does not automatically qualify it for the principal residence exemption. The property must meet the requirements under the Income Tax Act, and it must generally be designated as your principal residence when it is sold.

Potentially. Converting all or part of your principal residence into a rental property may trigger a deemed disposition under section 45(1) of the Income Tax Act. However, many homeowners can defer this tax consequence by filing a section 45(2) election, provided they meet the eligibility requirements and do not claim capital cost allowance (CCA) on the property.

The section 45(2) election allows a homeowner who converts a principal residence into a rental property to defer the deemed disposition that would normally occur upon the change in use. The election is made by filing a signed letter with the tax return for the year of the conversion. If the conditions are met, the property may continue to qualify as a principal residence for up to four additional years, even while it is rented.

Yes, but only one property per family unit may generally be designated as a principal residence for any particular tax year. If you own multiple properties, such as a cottage and a city home, careful tax planning is often required to determine which designation produces the greatest tax savings when the properties are eventually sold.

Yes. Since 2016, all sales of principal residences must be reported on your income tax return, even if the entire gain is exempt from tax. Taxpayers generally must complete Schedule 3 and Form T2091(IND). Failure to report the sale can result in penalties and may jeopardize your ability to claim the principal residence exemption.

Yes. Claiming CCA on a property can significantly affect your ability to designate it as a principal residence. If you claim CCA while relying on a section 45(2) election, you may lose the ability to designate those years as principal residence years, potentially increasing your capital gains tax when the property is sold.

In some cases. The CRA has discretion to accept late-filed section 45(2) elections under the taxpayer relief provisions. A late-filing penalty may apply, and the taxpayer must generally explain why the election was not filed on time. Whether late relief is available depends on the specific facts of the case.

Not necessarily. Since January 1, 2023, the residential property flipping rule may treat the profit from selling a residential property owned for fewer than 365 days as business income rather than a capital gain. When the flipping rule applies, the principal residence exemption generally cannot be claimed unless a statutory life-event exception applies.

Leaving Canada does not automatically eliminate your ability to claim the principal residence exemption for qualifying years. However, non-resident owners face additional tax obligations when renting or selling Canadian real estate, including withholding tax requirements and potential section 116 clearance certificate obligations. Professional tax advice is strongly recommended before emigrating or selling Canadian property.

Yes. A change in use can trigger immediate tax consequences, affect your future principal residence exemption, and create filing obligations that are easy to overlook. An experienced Canadian tax lawyer can help determine whether a section 45(2) or section 45(3) election is appropriate, avoid costly filing errors, and develop a tax-efficient strategy based on your specific circumstances.

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