With fluctuating Canadian housing markets and changing family needs, many homeowners decide to convert their primary residence into an income-producing rental property—or conversely, move into a property they previously leased to tenants. What many owners discover too late is that under Section 45 of the Canadian Income Tax Act, the CRA views a change in the use of real estate as a deemed disposition.

1. What Is a Deemed Disposition?

Even though no deed was transferred, no buyer was involved, and no money entered your bank account, the CRA considers that you sold the property at its Fair Market Value (FMV) on the exact date of conversion and immediately reacquired it at that same cost.

If the property was your principal residence prior to conversion, the accrued gain up to that date may be sheltered by your Principal Residence Exemption (PRE). However, you must formally report the change in use and designate the property on Schedule 3 and Form T2091 of your personal T1 return.

2. The Subsection 45(2) Election: Sheltering Up to 4 Years of Future Gains

Rather than recognizing the deemed disposition immediately, taxpayers can file an election under Subsection 45(2) of the ITA. This powerful statutory relief mechanism provides two major advantages:

  • Gain Deferral: It deems that no change in use occurred at the time of conversion, deferring all capital gains calculations until the property is genuinely sold in the future.
  • Up to 4 Additional Years of PRE: You may designate the property as your principal residence for up to four taxation years during which you did not ordinarily inhabit it, provided you remain a resident of Canada and do not designate another property for those same years.

3. The Fatal Trap: Never Claim CCA

To maintain the validity of a Subsection 45(2) election, you must not claim Capital Cost Allowance (CCA) on the rental property. Claiming depreciation on your statement of real estate rentals (Form T776) invalidates the election, triggering an immediate deemed disposition and disqualifying future principal residence shelter.

4. Moving Back In: The Subsection 45(3) Election

When converting a rental property into your primary residence, Subsection 45(1) triggers a deemed disposition of the rental property at FMV, generating taxable capital gains. Under Subsection 45(3), you can elect to defer recognition of that gain until the eventual sale of the home, provided no CCA was ever claimed on the building.

5. Professional Execution Steps

  1. Obtain a Written Valuation: Commission an independent, professional appraisal as of the conversion date to document FMV against future CRA reviews.
  2. File the Election on Time: A Subsection 45(2) election must be filed as a formal signed letter attached to your personal T1 return for the tax year in which the change occurred. Late-filed elections incur penalties under Section 220(3.1).
  3. Coordinate Multi-Property Portfolios: Because a family unit can only designate one principal residence per calendar year, careful modeling is required if you own cottages or secondary homes.