ImmoMulti — direct buyer of plexes and income properties on the North Shore — regularly sees owners caught off guard by a little-known tax rule: the residential property flipping rule, or "anti-flipping" rule. Since January 1, 2023, a residential property held for fewer than 365 consecutive days and then resold has its profit deemed to be business income — fully taxable at 100%, not a capital gain taxed at 50%. No capital gain, no principal residence exemption. For a duplex or triplex owner who resells quickly, the tax gap can be brutal. Here is exactly how the rule works, what it changes for a plex seller, and the exceptions to know before you sign at the notary.
What is the residential property flipping rule?
It is a federal deeming rule, in force since January 1, 2023 and harmonized by Revenu Québec: the profit from reselling a residential property held for fewer than 365 consecutive days is deemed to be business income, fully taxable. The property is treated as inventory, not capital property.
The rule targets what the Canada Revenue Agency calls a "flipped property": a housing unit located in Canada that the taxpayer owned for fewer than 365 consecutive days before the disposition. A right to purchase such a property (for example an assigned pre-construction contract) is also covered.
In practice, when this presumption applies, the profit is no longer treated as a capital gain but as business income. Revenu Québec notes that once recharacterized, the property is treated as inventory: the owner loses the advantages associated with capital property but gains access to those of business income (notably certain expense deductions).
The federal government's stated objective is to discourage rapid buy-and-sell transactions — "flips" — seen as contributing to upward pressure on real estate prices.
Sources: Revenu Québec — "Flipping Your Property (House or Residential Building)"; Department of Finance Canada — Explanatory Notes (paragraph 12(13)).
Why does "100% taxable" change everything for a seller?
A capital gain is only 50% taxable; business income is 100% taxable. On the same profit, the tax bill can roughly double. On top of that, the principal residence exemption never applies to a property caught by the flipping rule.
This is the heart of the problem. As La Presse summarized about the measure: net business income is 100% taxable, whereas a capital gain is only 50% taxable. The difference is far from theoretical.
Take an illustrative example. Suppose a net profit of $100,000 on the resale of a plex:
| Tax treatment | Taxable portion | Principal residence exemption |
|---|---|---|
| Capital gain (held ≥ 365 days, no recharacterization) | $50,000 (50%) | Possible if the property qualifies |
| Business income (quick resale < 365 days) | $100,000 (100%) | Never available |
On this $100,000 profit, the taxable amount jumps from $50,000 to $100,000 — that is, double. The actual tax depends on your combined federal-Québec marginal rate, but the base gap is undeniable.
Warning: living there will not save you
Many owners believe they can "live in one unit" of their plex to wipe out the tax. The flipping rule simply denies the principal residence exemption on the property it captures. Living in a unit of your duplex does not protect you if ownership is under 365 days and no exception applies.
Source: La Presse — "Des opérations d'achat-revente moins payantes" (January 9, 2023).
What does this change for your plex on the North Shore?
The rule targets a "housing unit," which includes duplexes, triplexes and fourplexes. If you have owned your North Shore plex for fewer than 365 consecutive days and resell it, the profit is likely taxed 100% as business income — unless one of the life events in the law justifies the sale.
A key point: the rule is not limited to single-family homes. It targets a housing unit, which encompasses multi-unit residential buildings — your duplexes, triplexes and fourplexes. For a plex owner on the North Shore (Terrebonne, Mascouche, Blainville, Boisbriand, Saint-Jérôme, Saint-Eustache, Deux-Montagnes) who bought recently and is thinking of reselling quickly, this is a major tax factor.
The at-risk scenarios are common: an investor who buys a multi-unit building, renovates it and tries to resell within a few months (a "flip"); a buyer who realizes after a few months that the profitability is not there and wants out quickly; or an assignment of a purchase right on a new-build project. In all of these cases, if ownership is under 365 days, the business-income presumption looms.
It is also one more reason to plan the timing of the sale. Waiting a few more weeks to cross the 365-consecutive-day threshold can, in some situations, shift the treatment from business income (100%) to capital gain (50%) — a calculation that warrants a tax specialist's advice.
"When a property is resold within a year of its purchase, there is a presumption that the net income realized on the resale is business income."
— Summary of the measure as reported by La Presse, January 9, 2023What are the exceptions to the anti-flipping rule?
The law provides a list of "life events." If the disposition reasonably results from one of them, the property is not a flipped property and the profit can revert to capital gain treatment.
According to the Department of Finance explanatory notes and CRA information, a property is not a flipped property if the disposition can reasonably be considered to occur due to, or in anticipation of, one of the following events:
- Death of the taxpayer or a related person;
- Household addition: a related person becomes a member of the taxpayer's household, or the taxpayer joins a related person's household (birth, adoption, elderly parent, etc.);
- Breakdown of marriage or common-law partnership, with separation of at least 90 days before the disposition;
- Threat to the personal safety of the taxpayer or a related person;
- Serious illness or disability of the taxpayer or a related person;
- Eligible relocation for work or studies: the new home is at least 40 km closer to the new work or school location;
- Involuntary termination of employment of the taxpayer or their spouse;
- Insolvency of the taxpayer;
- Involuntary disposition (for example destruction of the building or expropriation).
What to remember about the exceptions
- An exception does not "erase" the tax: it simply places the profit back into the capital gain regime (and restores access, where applicable, to the principal residence exemption).
- Each exception has its own conditions (the 90-day separation, the 40 km relocation, etc.). Document the situation carefully.
- When in doubt, have your file validated by a tax specialist or accountant before the sale.
Sources: Department of Finance Canada — Explanatory Notes on the exclusions (paragraph 12(13)); Revenu Québec — Property flipping.
What if I resell my plex at a loss within 12 months?
Bad news: in the context of a quick resale, Revenu Québec states that any loss resulting from the disposition is denied and deemed nil. The rule works against you on the upside, with no relief on the downside.
One might assume that, since the rule treats the property as a business asset, a loss would become fully deductible. It does not. Revenu Québec specifies that in a quick-resale situation, any loss is denied and deemed nil. You therefore cannot apply it against your other income.
In other words, the rule is asymmetric: a profit is fully taxed, but a loss provides no relief. For a plex owner who must sell quickly at a loss (poor profitability, unsustainable financing), this is a factor to build into the decision.
Beyond 365 days, am I in the clear?
Not automatically. The flipping rule is a presumption that adds to the existing rules. Even after 365 days of ownership, the CRA can recharacterize a profit as business income if the transaction resembles a trade in real estate (intent to resell, repeated renovate-and-flip activity, frequency of transactions).
The 365-day threshold removes doubt below it: under that period, except where an exception applies, the profit is presumed to be business income. But it creates no guarantee above it. The pre-existing tax rules continue to apply: a taxpayer who buys with the obvious intent to resell quickly, or who strings together flips, may see their profit characterized as business income even after more than a year of ownership.
For a genuine multi-unit investor who holds their plex long-term and rents it out in good faith, capital gain treatment remains the norm. For short-term operations, the ground is far more slippery.
Before selling your plex, ask yourself these questions
- How many consecutive days exactly have you owned the building?
- Does a life event provided by the law justify the sale (death, 90-day separation, job loss, 40 km relocation, etc.)?
- What was your intent at purchase — to live in / rent, or to resell quickly?
- Have you quantified the tax gap between the two treatments with a tax specialist?
At ImmoMulti, we buy plexes and income properties directly on the North Shore, with no broker and no commission. If you are weighing a quick exit, it is best to know your tax exposure before you sign. This article is informational: to quantify your specific case, consult a tax specialist, accountant or notary.
Informational content. Does not constitute legal or tax advice. Always confirm your specific situation with the Canada Revenue Agency, Revenu Québec, or a qualified professional.
