Principal Residence Exemption: When the Flip Tax Applies to You

Key takeaways

• The principal residence exemption (PRE) eliminates capital gains tax on the sale of a home you designated as your principal residence
• You can only designate one property per family unit per year as principal residence
• The 12-month flipping rule taxes gains from properties sold within 12 months of acquisition as business income, not capital gains
• The PRE is not automatic — you must designate it on Schedule 3 of your T1 return
• Partial use of a home for business or rental may reduce the exemption

The principal residence exemption remains the most valuable tax shelter available to most Canadians, but recent changes mean that more gains are being treated as fully taxable — particularly for frequent movers and property investors.

How the PRE is calculated

The exemption uses a formula: (1 + number of years the property is your principal residence) ÷ number of years you owned it, multiplied by your capital gain. The "plus 1" adjustment allows for the fact that you cannot designate two properties in the same year for an overlap year. Properties acquired before 1982 benefit from a different calculation.

A home you lived in as your principal residence for all years of ownership is fully exempt from capital gains tax. A home owned for 10 years but designated as principal residence for only 7 of those years will have a partial gain subject to tax.

The 12-month flipping rule

Effective January 1, 2023, gains from the sale of a residential property held for less than 12 months are deemed to be business income — not a capital gain — and therefore not eligible for the PRE or the 50% capital gains inclusion rate. The full gain is included in income. Exceptions exist for life events: death, marriage breakdown, employment relocation, disability, and others. The rule also does not apply to newbuilds sold before the 12-month mark if the property was never completed.

Partial use for rental or business

Using part of your home to earn rental income or carry on a business can trigger a partial denial of the PRE. If you rent out a room and deduct a portion of your home expenses, you may have a deemed disposition (and gain) when you stop renting. CRA Form T2091 (Designation of a Property as a Principal Residence) is required when you claim the exemption on a sale.