Key Takeaways
- 1.The PRE formula is (1 + years designated) ÷ total years owned. Designating 5 of 10 years exempts 60% of the capital gain — the “+1” bonus year is a statutory cushion for buy/sell overlap.
- 2.On a $370,000 total gain, the taxable portion is $148,000 (40%). At the 50% inclusion rate, the taxable capital gain is $74,000.
- 3.Quebec residents must file both T2091 (federal) and TP-274-V (Quebec) — even when the gain is partially or fully exempt. Missing either form triggers penalties.
- 4.The CRA 45(2) election can freeze a change-in-use for up to 4 years, increasing your designated years and reducing the taxable gain — but you must file the election letter in the year of conversion.
- 5.Combined federal + Quebec tax on the $74,000 taxable capital gain is approximately $22,000–$24,000 depending on other income — a cost that proper planning with the 45(2) election could have reduced significantly.
The Scenario: $920K Quebec Property With 5 Years of Basement Rental
Here are the facts for this worked example:
- Purchase price: $550,000 (2015)
- Sale price: $920,000 (2025)
- Years owned: 10
- Personal-use only: Years 1–5 (2015–2019)
- Basement suite rented: Years 6–10 (2020–2024) at $1,500/month
- CCA claimed on rental portion: None (critical for PRE eligibility)
- Province: Quebec
- Other income: $85,000 employment income
The total capital gain on disposition is $920,000 − $550,000 = $370,000. The question is: how much of that $370,000 can the principal residence exemption shelter?
Step 1: The PRE Formula — (1 + Years Designated) ÷ Years Owned
The principal residence exemption formula under section 40(2)(b) of the Income Tax Act calculates the exempt fraction of your capital gain:
Exempt portion = (1 + years designated as principal residence) ÷ total years owned
In this scenario:
Years owned = 10
Years designated = 5 (the personal-use-only years, 2015–2019)
Exempt fraction = (1 + 5) ÷ 10 = 6 ÷ 10 = 60%
Exempt gain = $370,000 × 60% = $222,000
Taxable capital gain (before inclusion) = $370,000 − $222,000 = $148,000
The “+1” in the formula is intentional — it is a statutory bonus year that prevents double taxation when you buy one principal residence and sell another in the same year. Even if you only designate 5 of 10 years, you get credit for 6. This bonus applies regardless of whether you actually owned two properties simultaneously.
Step 2: Applying the Capital Gains Inclusion Rate
The $148,000 in non-exempt capital gain must be included in income at the applicable inclusion rate. For the 2025 tax year:
| Capital Gain Layer | Amount | Inclusion Rate | Taxable Capital Gain |
|---|---|---|---|
| First $250,000 of net gains | $148,000 | 50% | $74,000 |
| Total taxable capital gain | $148,000 | — | $74,000 |
Because the non-exempt gain ($148,000) falls below the $250,000 threshold, the entire amount is included at 50%. If the non-exempt gain exceeded $250,000, the portion above $250,000 would be included at 2/3 under the proposed 2024 federal budget rules. For a deeper look at the inclusion rate tiers, see our capital gains inclusion rate calculator.
Step 3: Federal and Quebec Tax on the $74,000 Taxable Capital Gain
This is where Quebec's dual-jurisdiction filing creates a planning variable that no competing resource calculates. The $74,000 taxable capital gain stacks on top of the homeowner's $85,000 employment income, pushing total taxable income to approximately $159,000.
| Tax Layer | Marginal Rate on Gain | Approximate Tax |
|---|---|---|
| Federal tax on $74,000 taxable capital gain | 26%–29% | $8,900–$9,800 |
| Quebec provincial tax on $74,000 | 24%–25.75% | $12,400–$13,500 |
| Quebec abatement (16.5% federal reduction) | — | −$1,500–$1,600 |
| Combined tax on capital gain | — | $19,800–$21,700 |
Quebec residents receive a 16.5% federal tax abatement that partially offsets the higher provincial rates. The combined marginal rate in Quebec at this income level is approximately 45%–48%, which applies to the $74,000 taxable capital gain. Note that because the gain is already halved by the 50% inclusion rate, the effective tax on the original $148,000 non-exempt gain is roughly 22.5%–24%. For a complete breakdown of Quebec marginal rates, see our Quebec income tax calculator.
The CRA 45(2) Election: How It Could Have Saved Thousands
Section 45(2) of the Income Tax Act is the most underused planning tool for homeowners who begin renting part of their property. Here is how it works and what it would have done in this scenario:
- What it does: When you convert your principal residence (or part of it) to income-producing use, the CRA normally treats this as a deemed disposition at fair market value. The 45(2) election lets you defer this deemed disposition.
- The bonus: With the election in place, you can continue designating the property as your principal residence for up to 4 additional years after the change in use — even while collecting rent.
- Requirements: You must file a letter with your tax return for the year of the change in use. You cannot claim CCA on the property during the election period. You must not designate any other property as your principal residence during those years.
The 45(2) Impact on Our $920K Scenario
If our Quebec homeowner had filed the 45(2) election in 2020 when the basement rental began, they could designate 4 additional years (2020–2023) as principal residence years — increasing designated years from 5 to 9:
Without 45(2) election:
Designated years = 5
Exempt fraction = (1 + 5) ÷ 10 = 60%
Taxable gain = $370,000 × 40% = $148,000
Taxable capital gain (50% inclusion) = $74,000
Estimated combined tax = ~$20,700
With 45(2) election:
Designated years = 9 (5 original + 4 bonus)
Exempt fraction = (1 + 9) ÷ 10 = 100%
Taxable gain = $370,000 × 0% = $0
Estimated combined tax = $0
Tax savings from 45(2) election = ~$20,700
Critical Timing Note
The 45(2) election must be filed for the year of the change in use — in this case, 2020. You cannot file it retroactively in the year of sale. If our homeowner missed the 2020 filing deadline, the CRA may accept a late election under subsection 220(3.2) with a T2029 request, but approval is discretionary and late-filing penalties may apply. This is why planning before you start renting is essential.
When the 45(2) Election Does Not Fully Shelter the Gain
The 45(2) election has a 4-year maximum. If the rental period exceeds 4 years and you do not move back into the property, the election cannot cover all the rental years. In our scenario, the 5-year rental period means:
| Scenario | Designated Years | Exempt % | Taxable Gain | Tax Owed |
|---|---|---|---|---|
| No election (baseline) | 5 | 60% | $148,000 | ~$20,700 |
| With 45(2) election | 9 | 100% | $0 | $0 |
| Rented 7 years, with election | 7 (3 + 4) | 80% | $74,000 | ~$10,350 |
| Rented 7 years, no election | 3 | 40% | $222,000 | ~$31,000 |
Tax estimates assume combined federal/Quebec marginal rates at this income level and 50% capital gains inclusion. The 45(2) election becomes even more valuable as the rental period approaches or exceeds 4 years. For rental properties held long-term without a PRE claim, see our rental property depreciation calculator.
The CCA Trap: Why You Should Not Claim Depreciation on a Basement Suite
Many landlords claim capital cost allowance (CCA) on the rental portion of their home to reduce rental income taxes. For a basement suite in your principal residence, this is almost always a mistake:
- CCA triggers change-in-use: Claiming CCA on any portion of your principal residence creates a mandatory deemed disposition on that portion at fair market value. The CRA treats the rental portion as a separate property from that point forward.
- Kills the 45(2) election: You cannot use the 45(2) election if you have claimed CCA on the property. The election requires that you did not deduct any CCA for the period.
- CCA recapture on sale: All CCA previously claimed is recaptured as income (not capital gain) on the sale — taxed at your full marginal rate, not the capital gains inclusion rate.
- The math rarely works: In our scenario, CCA on the basement portion (say 30% of $550,000 = $165,000 at 4% declining balance) would save roughly $6,600 in year 1 rental tax. But losing the PRE on the rental portion costs $20,700+ on the eventual sale. The long-term cost far exceeds the short-term benefit.
Mandatory Reporting: T2091 and TP-274-V Filing Requirements
Since 2016, the CRA requires you to report the sale of a principal residence on your tax return — even when the entire gain is exempt. Quebec has a parallel requirement. Here is what each form covers:
| Form | Filed With | Purpose |
|---|---|---|
| T2091(IND) | CRA (federal) | Designate years as principal residence for federal PRE calculation. Report on Schedule 3. |
| TP-274-V | Revenu Québec | Provincial designation of principal residence years. Required even if gain is fully exempt. |
| Schedule 3 | CRA (federal) | Report the capital gain or loss on disposition. Cross-references T2091 for PRE claim. |
| Schedule G | Revenu Québec | Quebec equivalent of Schedule 3. Reports the capital gain for provincial tax purposes. |
Failure to file T2091 can result in the CRA denying the principal residence exemption entirely. The late-filing penalty is $100/month up to a maximum of $8,000. Revenu Québec applies its own penalties for missing TP-274-V.
What Qualifies as a Principal Residence Under Canadian Tax Law
Not every property qualifies for the PRE. The CRA defines a principal residence as a housing unit that you, your spouse/common-law partner, or your child “ordinarily inhabited” during the year. Key eligibility rules:
- One per family unit per year: Since 1982, each family unit (you + spouse/partner) can designate only one property as a principal residence per year. This matters if you own a cottage and a city home.
- “Ordinarily inhabited” is broad: The CRA interprets this liberally. A property used seasonally (cottage, ski chalet) can qualify if you lived in it during part of the year. There is no minimum-days requirement.
- Land limit: The underlying land qualifies up to 0.5 hectares (1.24 acres). Excess land is not eligible for the PRE and generates a separate taxable capital gain.
- Mixed-use properties: If only part of the property is your principal residence (e.g., a duplex where you live in one unit), the PRE applies only to the personal-use portion — unless the rental is ancillary and you did not claim CCA. For a related analysis, see our blended family PRE calculator for two homes in BC.
Putting It All Together: Complete Tax Summary
Here is the full calculation from purchase to after-tax proceeds for our Quebec homeowner:
Sale proceeds: $920,000
Original cost: $550,000
Total capital gain: $370,000
PRE calculation (no 45(2) election):
Exempt fraction: (1 + 5) ÷ 10 = 60%
Exempt gain: $222,000
Non-exempt gain: $148,000
Capital gains inclusion (50%):
Taxable capital gain: $74,000
Tax on $74,000 (stacked on $85K employment income):
Federal tax (net of Quebec abatement): ~$8,200
Quebec provincial tax: ~$12,800
Total tax on capital gain: ~$21,000
After-tax sale proceeds:
$920,000 − $21,000 = ~$899,000
Had the homeowner filed the 45(2) election in 2020, the entire gain would have been exempt, and the full $920,000 would have been retained. The $21,000 tax cost is the price of not knowing about — or not filing — a single election letter.
The 2024 Capital Gains Inclusion Rate Change: Impact on This Scenario
The 2024 federal budget proposed increasing the capital gains inclusion rate from 50% to 2/3 (66.67%) for individual gains exceeding $250,000 annually. This measure was legislatively paused, but if enacted, it would affect partial PRE scenarios where the non-exempt gain exceeds $250,000.
In our scenario, the non-exempt gain is $148,000 — well under the $250,000 threshold — so the 50% inclusion rate applies regardless. But consider a more expensive property: if the non-exempt gain were $400,000, the first $250,000 would be included at 50% ($125,000) and the remaining $150,000 at 2/3 ($100,000), producing a taxable capital gain of $225,000 instead of $200,000 under the old rules. For a detailed walkthrough of the two-tier inclusion system, see our capital gains inclusion rate calculator.
Planning Checklist for Quebec Homeowners With Rental Portions
- Before you start renting: File the 45(2) election letter with your tax return for the year you begin renting. There is no prescribed form — a signed letter identifying the property and citing subsection 45(2) is sufficient.
- Never claim CCA: On any portion of a property you intend to claim as your principal residence. The annual CCA deduction is almost never worth more than the PRE shelter on sale.
- Track your designated years: Keep a simple spreadsheet showing which years each property was designated as your principal residence. You can only designate one property per year per family unit.
- File both forms on sale: T2091 with the CRA and TP-274-V with Revenu Québec. Missing either form can cost you the exemption.
- Consider the rental period length: The 45(2) election covers a maximum of 4 years. If you plan to rent for longer, budget for a partial taxable gain on the eventual sale. See our partial PRE claim calculator for an Ontario condo scenario for a similar analysis in a different province.
Important Disclaimer
This article provides general information about the principal residence exemption and capital gains tax for Quebec residents in the 2025 tax year. It is not tax, legal, or financial advice. The PRE formula, 45(2) election rules, and capital gains inclusion rates are governed by the Income Tax Act (federal) and the Taxation Act (Quebec). Tax rates and brackets are as legislated for the 2025 tax year. The proposed 2/3 capital gains inclusion rate for gains above $250,000 was legislatively paused as of early 2025 — consult current legislation for the applicable rate. The CRA's interpretation of “ordinarily inhabited,” mixed-use properties, and ancillary rental use involves judgment calls that may vary by situation. Consult the CRA, Revenu Québec, or a qualified tax professional for guidance specific to your circumstances.