Understanding the Principal Residence Exemption and Property Use Changes in Canada 

In Canada, homeowners can benefit from the Principal Residence Exemption (PRE), which allows them to avoid capital gains tax when selling their primary home. This exemption is applicable under certain conditions and is defined in Section 54 of the Income Tax Act. The Canada Revenue Agency provides a comprehensive guide on this topic in Income Tax Folio S1-F3-C2. 

Eligibility for Principal Residence Exemption 

A property can be considered a principal residence if it is: 

• A housing unit, such as an apartment, house, or cottage. 
• A leasehold interest in a housing unit. 
• A share in a cooperative housing corporation, purchased primarily for personal use. 

Designating a Principal Residence 

When you sell your principal residence, you must designate it as such in your tax return for that year using form T2091 (IND). It’s important to note that only one property per year can be designated as a principal residence by a family unit. 

Changes in Property Use 

A change in use occurs when a property transitions from being a principal residence to a rental property or the other way around. This change can lead to a deemed disposition, which is treated as a sale at fair market value for tax purposes. 

• From Principal to Rental: If you start renting out your home, you may be deemed to have sold it at its fair market value. However, you can elect under subsection 45(2) to defer this deemed disposition, allowing you to continue treating the property as your principal residence for up to four additional years, even if you forgot to make this election initially. 

• From Rental to Principal: Conversely, converting a rental property to your principal residence also triggers a deemed disposition. You can elect under subsection 45(3) to defer the capital gains tax that would result from this change. 

Partial Use Changes 

If only part of your principal residence is used to generate income, the tax implications are based on the proportion of the home that’s changed use. Temporary changes do not usually result in a deemed disposition. 

Capital Cost Allowance (CCA) Considerations 

Claiming CCA on a property can affect your ability to claim the PRE. It’s advisable to consult with a tax professional before claiming CCA on a property that has been or will be your principal residence. 

Renting Out Part of Your Home 

Renting out a portion of your home, like a basement, generally doesn’t trigger a change in use provided the rental is secondary to the main use of the property as your residence, and no significant structural changes are made.