Tax on selling a property: who pays, on what, and how much

The basic mechanics

The gain is the sale price minus what you paid and minus eligible costs (commission, legal fees, lasting improvements). Only a portion of that gain enters taxable income — and that is precisely the parameter that has moved most in recent years.

• Only a fraction of a capital gain enters taxable income: the "inclusion rate". The CRA guide for the 2025 tax year sets it at one half (1/2) and itself applies 50% in its calculations. No mention of a two-thirds rate appears in it.

  Generally, the IR for 2024 is 1/2.

  Verified at source T4037, section « Definitions » — Inclusion rateAgence du revenu du Canada — guide T4037, « Capital Gains – 2025 » (T4037(E) Rev. 25)verified 2026-07-30

• There is no separate "capital gains tax rate": the included portion is added to that year's income and follows your usual federal and provincial brackets.

  To be confirmed at source — not published until it is

The principal residence: exempt, but not silent

This is the rule that shields most Canadian households, and also the one that produces the worst surprise — not because of the tax, but because of the filing. Many sellers believe an exempt sale need not be reported. It does, and the penalty for omission is not symbolic.

The other trap is the cottage. A household can designate only one principal residence per year: a couple owning a city house and a waterfront cottage must choose, year by year, which one they designate — and that choice is made at sale time, looking back across every year of ownership. It is an optimization exercise, not a formality.

• A property is a principal residence for a year if four conditions are met: it is a housing unit (house, cottage, condo, apartment, trailer, mobile home, houseboat…); you own it, alone or jointly; you, your current or former spouse or common-law partner, or one of your children lived in it at some time during the year; and you designate it as your principal residence.

  A property qualifies as your principal residence for any year if it meets all of the following four conditions

  Verified at source T4037, chapitre 6 — What is a principal residenceAgence du revenu du Canada — guide T4037, « Capital Gains – 2025 » (T4037(E) Rev. 25)verified 2026-07-30

• Since 1982, only one housing unit per year can be designated as the family's principal residence — the family including spouses (married or common-law) and unmarried minor children. A couple therefore cannot designate two different properties for the same year.

  For 1982 and later years, you can only designate one housing unit as your family's principal residence for each year.

  Verified at source T4037, chapitre 6 — Can you have more than one principal residenceAgence du revenu du Canada — guide T4037, « Capital Gains – 2025 » (T4037(E) Rev. 25)verified 2026-07-30

• Since the 2016 tax year, the CRA allows the exemption ONLY if the disposition and designation are reported on the income tax return. An omission is fixed by asking to amend that year's return — the CRA accepts a late designation in certain circumstances, but a penalty may apply.

  the CRA will only allow the principal residence exemption if you report the disposition and designation of your principal residence on your income tax and benefit return

  Verified at source T4037, chapitre 6 — Why you have to report the saleAgence du revenu du Canada — guide T4037, « Capital Gains – 2025 » (T4037(E) Rev. 25)verified 2026-07-30

• Where the property was not a principal residence for the whole ownership period, the exemption is prorated over the designated years, using a CRA-published formula that includes one extra transition year (the "plus 1" rule).

  To be confirmed at source — not published until it is

The plex, the rental and the change of use

An owner living in one unit of their plex and renting the others sits in a mixed regime: part of the building follows principal-residence rules, part follows rental rules. The split is not cosmetic — it decides the bill.

And there is a tax moment almost nobody sees coming: the change of use. Turning your home into a rental — or the reverse — can trigger a deemed disposition, that is, a taxable event without a single dollar changing hands. That is the kind of decision to take with a tax specialist beforehand, never afterwards.

• Every change in a property's use — a residence becoming a rental, or the reverse — means you are considered to have sold it at fair market value and immediately reacquired it for the same amount. Tax can therefore apply without a dollar changing hands. The years the home was your principal residence remain exempt.

  Every time you change the use of a property, you are considered to have sold the property at its fair market value and have immediately reacquired the property for the same amount.

  Verified at source T4037, chapitre 6 — Changes in useAgence du revenu du Canada — guide T4037, « Capital Gains – 2025 » (T4037(E) Rev. 25)verified 2026-07-30

• In an income property partly occupied by its owner, the sale price and cost must be split between the principal-residence portion and the rental portion. Only the gain on the income-producing portion is taxable.

  To be confirmed at source — not published until it is

• If capital cost allowance was claimed on the rental portion, the sale can trigger a recapture, taxable as INCOME — in full, not at the capital-gains fraction.

  To be confirmed at source — not published until it is

The inherited house: the case that demands a valuation

On death, the law treats property as if it had been sold at fair market value. For an heir who later resells, the consequence is direct and often reassuring: their cost base is the value at the date of death. Only the appreciation accumulated since that moment is their gain.

Everything therefore rests on one number: what was the property worth that day? It is a past value, which must be established defensibly, sometimes years later. That is a certified appraiser's work — and one of the rare situations where a valuation paid for today can be worth thousands in tax avoided tomorrow. A broker's opinion of value, however well-intentioned, does not play the same role.

• On death, the person is deemed to have disposed of their property at fair market value immediately before death, which can create a gain to report on the final return. Property transferred to a Canada-resident spouse may benefit from a rollover deferring the tax.

  To be confirmed at source — not published until it is

• For an heir who later sells, the cost base is the fair market value used at death: only the appreciation accumulated AFTER the death is their gain.

  To be confirmed at source — not published until it is

• No CRA page aimed at taxpayers was found explicitly requiring or recommending that the fair market value of an inherited property be established by a certified appraiser. Using one is therefore presented here as USUAL PRACTICE to obtain a defensible value — not as a tax obligation.

  Verified at source Constat de recherche — aucune directive publique de l'ARC en ce sensAgence du revenu du Canada (recherche du 2026-07-29)verified 2026-07-30

And in Quebec?

Quebec administers its own income tax alongside the federal one. What that changes concretely for a Quebec seller is being verified — nothing will be asserted here before confirmation with Revenu Québec.

• Revenu Québec applies an inclusion rate aligned with the federal one and a similarly designed principal-residence exemption, but the designation is filed SEPARATELY at the provincial level, using a distinct form attached to the Quebec return.

  To be confirmed at source — not published until it is

What this dossier is, and what it is not

• It is not tax advice. No real case is settled by a web page: your marginal rate, your other income that year, the property's use history and elections already made all change the outcome.
• No rate is hardcoded. The capital-gains inclusion rate has been the subject of successive announcements since 2024 — an increase announced above a threshold, then deferrals. Publishing an unverified figure would be exactly the mistake this house forbids: the calculator asks for the rates rather than assuming them.
• Every rule cited carries its source and date. A tax rule without a date is unusable: it may have changed at the last budget.
• Three situations warrant a professional before signing, not after: the partly owner-occupied plex, the change of use, and the estate. In all three, the order of operations matters as much as the numbers.

Frequently asked questions