Principal Residence Exemption on Death in Canada 2026: Shielding the $1.2M Family Home with Form T1255

The Deemed Disposition: Why CRA Taxes a Home Nobody Actually Sold

Under section 70(5) of the Income Tax Act, a person who dies is deemed to have disposed of all their capital property — including real estate — at fair market value immediately before death. This is a fiction: nobody sold anything. But CRA treats it as a sale, and the resulting capital gain (FMV minus adjusted cost base) goes on the deceased's terminal T1 return.

For a family home, this deemed disposition often produces a large gain. A Mississauga home purchased in 2008 for $380,000, now worth $1.2M, has an embedded $820,000 capital gain. Without the Principal Residence Exemption, 50% of that gain — $410,000 — would be added to the deceased's income on the terminal return. At Ontario's top combined marginal rate of 53.53%, that's roughly $219,000 in capital gains tax on a home the family never intended to sell.

The PRE exists to prevent exactly this outcome. But it doesn't apply automatically — the executor must claim it by filing Form T1255 with the terminal return.

The PRE Formula: How (1 + Years Designated) ÷ Years Owned Eliminates the Gain

The Principal Residence Exemption formula under section 40(2)(b) of the ITA determines how much of the capital gain is exempt:

The "+1" in the numerator is the bonus year — sometimes called the plus-one rule. It means you can designate a property for one more year than you actually lived in it. This matters when someone owned two properties (home plus cottage) and needs to cover a transition year where both were held simultaneously.

Worked example: $1.2M Mississauga home, 18 years of ownership

The entire $820,000 gain disappears. Because the deceased designated the home as their principal residence for all 18 years, and the +1 bonus year pushes the exempt fraction above 100%, not a dollar of capital gains tax is owed.

One family unit can only designate one property per year as a principal residence. The family unit includes the deceased, their spouse or common-law partner, and any unmarried minor children. If the deceased also owned a cottage, every year designated to the home is a year the cottage doesn't get PRE coverage — and the cottage gain at death will be partially or fully taxable.

Form T1255: The Filing That Makes or Breaks the Exemption

Form T1255 — "Designation of a Property as a Principal Residence by the Legal Representative of a Deceased Individual" — is the executor's tool for claiming the PRE on the deceased's behalf. It is filed with the terminal T1 return for the year of death. Since the 2016 reporting-rule changes, CRA requires this form even for a fully-exempt principal residence disposition. Before 2016, many Canadians never reported principal residence sales at all; now, failing to file T1255 means failing to claim the exemption.

The form requires:

• Description and address of the property
• Date of acquisition and date of disposition (the date of death)
• Proceeds of disposition (fair market value at date of death — get a formal appraisal)
• Adjusted cost base (original purchase price plus capital improvements: roof, addition, finished basement — not cosmetic maintenance like paint)
• Years of designation as the principal residence (list each year, e.g., 2008 through 2025)
• Calculation of the exempt gain using the PRE formula

The executor reports the resulting capital gain (if any) on Schedule 3 of the terminal T1 return. If the PRE covers the full gain, the net taxable gain is $0 — but the reporting is still required. CRA has the discretion to accept a late-filed T1255 in some circumstances, but relying on that discretion is not a plan. File it with the terminal return.

When the Home Was NOT the Principal Residence Every Year

The math changes when the deceased can't designate the home for every year of ownership. This typically happens when they also owned a cottage, when they rented out the home for a period, or when they lived abroad and owned another home.

Worked example: home + cottage, 4 years of split designation

Splitting 4 years to the cottage cost the estate $36,580 in tax on the home. Whether that trade-off is worth it depends on the cottage gain — if the cottage had a $600,000 embedded gain and those 4 designated years shelter a bigger per-year gain on the cottage than on the home, the net estate tax is lower. This is the designation optimization problem, and it's worth running the numbers both ways before filing T1255.

The general rule: designate each year to whichever property had the highest per-year gain for that year. The per-year gain is the total gain on the property divided by the number of years it was owned. Assign designation years to the property with the larger per-year number until one property is fully covered, then assign the remaining years to the other.

Change-in-Use Rules: Section 45(2) and 45(3) Elections

If the deceased rented out their home — or converted part of it to an income-producing use — a "change-in-use" may have occurred under section 45(1) of the ITA. A change-in-use triggers a deemed disposition at fair market value at the date of the change, and from that point forward, the property is no longer a principal residence for the rented portion.

Two elections can soften this blow:

• Section 45(2) election — converting from personal use to rental: The deceased could elect to be deemed not to have changed the use, allowing the home to remain a principal residence for up to 4 additional years after the conversion, even while rented. The election must have been filed by the deceased in the tax year the change-in-use occurred (or within a reasonable amendment period). After death, the executor cannot file this election retroactively. If it was filed, the T1255 designation can include those extra 4 years.
• Section 45(3) election — converting from rental to personal use: If the deceased moved into a property that was previously a rental, they could elect to defer the deemed disposition that would otherwise occur at the date they moved in. This allows the property to be designated as a principal residence for up to 4 years before they actually moved in. Again, this election must have been filed during the deceased's lifetime.

The critical takeaway for executors: check the deceased's prior tax returns for any 45(2) or 45(3) elections. If they rented the home and no election was filed, those rental years cannot be designated as principal residence years on Form T1255, and a taxable fraction of the gain will emerge. If the election was filed, the executor can include those years in the designation — potentially saving tens of thousands in tax.

The Spousal Rollover Under Section 70(6): Defer or Claim?

When property passes to a surviving spouse or common-law partner, section 70(6) of the ITA provides an automatic rollover: the home transfers at the deceased's adjusted cost base, not at fair market value. No deemed disposition is triggered, no capital gain is realized, and no PRE needs to be claimed at that point. The tax is deferred until the surviving spouse sells the home or dies.

This is the default treatment — it happens automatically unless the executor elects otherwise on the terminal T1 return. For most surviving spouses who plan to continue living in the home, the rollover is the right call: no immediate tax, and the PRE will be available when they eventually sell or when their own estate handles the deemed disposition.

When electing OUT of the rollover is smarter

There are situations where the executor should consider triggering the deemed disposition at death — paying $0 tax via the PRE — rather than deferring it:

• The surviving spouse plans to sell and buy a new home. If the survivor is going to sell the family home and purchase a new property, the new property becomes their principal residence from that point forward. By electing out of the rollover, the deceased's PRE covers the full gain on the family home (at $0 tax), and the survivor's cost base resets to FMV. The survivor's own PRE years are then free for the new home. Without the election, the survivor inherits the low cost base and must allocate their PRE between the old home and the new one.
• The couple owned a cottage. If the deceased and survivor also own a cottage, every year of PRE designation used on the family home is a year unavailable for the cottage. By claiming the deceased's PRE now (at death), the home gain is eliminated, and the survivor's future PRE years can be allocated to the cottage.
• The gain is fully covered by the PRE anyway. If the home gain is $0 after the PRE, there's no cost to electing out, but the cost-base step-up benefits the survivor for any future sale. This is free tax planning.

The election out is made on the deceased's terminal T1 return. The executor should model both scenarios — rollover vs. elect-out — before filing. Once the terminal return is filed, the choice is difficult to reverse.

How the Taxable Gain Is Computed in 2026

When the PRE does not cover the entire gain — because the home wasn't designated for every year, or because there's a post-death gain in the estate — the taxable portion is calculated as follows:

The 50% capital gains inclusion rate is confirmed for 2026. The proposed increase to 66.67% on gains above $250,000 (from the June 2024 budget) was deferred on January 31, 2025, then cancelled outright on March 21, 2025 by the Carney government. The tiered rate never took effect. All capital gains in 2026 are included at a flat 50% rate — for individuals, corporations, and trusts alike.

Worked example: non-exempt gain at Ontario top rate

Those 4 designation years redirected to the cottage cost the home $53,827 in tax and probate. If the cottage gain sheltered by those 4 years exceeds $53,827, the trade-off works. If it doesn't, the executor made the wrong allocation — and once the terminal return is filed, there's no redo.

The Estate Post-Death Gain Trap

The PRE covers the gain up to the date of death. After that, the estate is a separate taxpayer. If the estate holds the home for 14 months while probate drags on, and the GTA market moves even modestly, a new taxable gain accumulates — and the estate generally cannot claim the PRE on this post-death appreciation.

There is one narrow exception: if the estate qualifies as a Graduated Rate Estate (GRE) — meaning it's within 36 months of the date of death and has been designated as a GRE on the T3 trust return — the estate can designate the home as its own principal residence for one year. But only if no other individual (such as a beneficiary living in the home) designates another property as their principal residence for that same year.

For estates holding GTA properties, the practical advice is clear: sell promptly. Every month the estate holds the home is a month where market appreciation creates a taxable gain that no PRE will cover. If probate takes 8–12 months (typical in Ontario), the estate should be preparing the home for sale in parallel — cleaning, staging, listing — so it closes as soon as the Certificate of Appointment is issued.

Ontario Probate: The Other Cost That Hits the $1.2M Home

Capital gains tax is one cost. Ontario probate fees are the other. Ontario's Estate Administration Tax charges $0 on the first $50,000, then $15 per $1,000 (1.5%) on everything above $50,000.

Probate applies to any asset that passes through the will. If the home was held in joint tenancy with right of survivorship (JTWROS), it transfers automatically to the surviving joint tenant outside the will — bypassing probate entirely. This is a $17,250 saving on a $1.2M home. But adding a child as a joint tenant has serious risks: it exposes the home to the child's creditors, creates a family-law asset if the child divorces, and may trigger a deemed disposition at the time the joint tenancy is created (depending on whether beneficial ownership actually transferred). Joint tenancy works cleanly between spouses; between parent and child, the trade-offs need careful analysis.

The 2016 Reporting Rule Change: Why CRA Now Requires T1255 Even for Fully-Exempt Sales

Before October 2016, Canadians selling (or deemed to have sold) their principal residence often did not report the transaction at all — the gain was exempt, so they skipped it. CRA changed this: starting with the 2016 tax year, every disposition of a principal residence must be reported, and the designation must be made on the return (Form T2091 for living taxpayers, Form T1255 for deceased taxpayers). Failure to report can result in CRA denying the PRE entirely, or at minimum requiring an amendment with potential late-filing penalties.

For executors in 2026, the rule is simple: always file T1255 with the terminal return. Even if the home was the deceased's only property, even if the gain is $0, even if you think CRA won't notice. The form takes 20 minutes. The cost of not filing it can be the loss of a six-figure exemption.

Putting It All Together: Executor Decision Tree

When a homeowner dies in Ontario in 2026, here is the sequence of decisions the executor faces on the family home:

1. Is there a surviving spouse? If yes, the s.70(6) rollover applies automatically. Decide whether to accept the rollover or elect out to claim the PRE now. Model both.
2. Was the home the principal residence for every year? If yes, the PRE covers 100% of the gain. File T1255. Done.
3. Did the deceased own a second property (cottage, condo)? If yes, optimize the designation: assign each year to the property with the higher per-year gain.
4. Was the home ever rented or income-producing? If yes, check for a 45(2) or 45(3) election in prior tax returns. If no election was filed, the rental years reduce the PRE.
5. File Form T1255 with the terminal T1 return. Report the gain (even if $0) on Schedule 3.
6. Get a formal date-of-death appraisal. CRA may question the FMV years later — a professional appraisal is your evidence.
7. Sell promptly to avoid post-death capital gains accumulating in the estate.