If you own more than one property in the GTA, the tax bill on a sale can run into six figures. The rules around capital gains and the principal residence exemption (PRE) are some of the most misunderstood in Canadian real estate. Here is what actually applies in 2026.

This is general information, not tax advice. Always confirm with a CPA before you sell.

The short version

If a property has been your home every year you owned it, you pay zero tax on the sale, but you still have to report it.

If you own two properties, only one can be your designated principal residence in any given year.

The capital gains inclusion rate stayed at 50 percent in 2026 after the proposed hike was cancelled.

Sell within 365 days of buying and the anti-flipping rule treats the entire profit as business income. The PRE is denied.

How capital gains tax works

A capital gain is the profit when you sell for more than you paid. In Canada, only a portion of that gain (the inclusion rate) gets added to your income and taxed at your marginal rate.

The inclusion rate is 50 percent in 2026. The proposed increase to 66.67 percent was cancelled in March 2025 and confirmed cancelled in Budget 2025.

One quick clarification: the 50 percent inclusion rate is not a 50 percent tax. It is the portion of the gain that gets added to your income, which is then taxed at your marginal rate.

The math. Sell a Mississauga rental for a $300,000 gain. $150,000 (half the gain) gets added to your income. At a 43 percent marginal Ontario rate, you owe roughly $64,500. That works out to an effective tax rate of about 21.5 percent on the full $300,000 gain.

The principal residence exemption, in plain English

The PRE lets most Canadians sell their home tax-free. To qualify, you (or your spouse or dependent child) must have ordinarily inhabited the property in each year you designate it.

"Ordinarily inhabited" does not mean year-round. A Muskoka cottage used in the summer can qualify.

The one-property-per-family rule

Since 1982, only one property per family unit can be designated as principal residence per year. Your family unit is you, your spouse or common-law partner, and any unmarried kids under 18.

Own a home in the Junction and a cottage in Prince Edward County? You cannot have both fully exempt. You have to choose which one to designate for which years.

A real GTA example

You bought a detached home in Lorne Park in 2005 for $650,000 and a Haliburton cottage in 2012 for $400,000. You sell both in 2026: Lorne Park for $2.1M, the cottage for $900,000.

Lorne Park gain: roughly $69,000 per year

Cottage gain: roughly $35,700 per year

Your accountant will usually designate the property with the higher annual gain as principal residence for more years, because each designated year saves more tax when applied to the higher-appreciation property. Getting this split right can save $30,000 to $60,000 in tax.

This is not a decision to make on your own.

The 365-day anti-flipping trap

Since January 1, 2023, if you sell a residential property you owned for less than 365 consecutive days, the anti-flipping rule treats the entire profit as business income, not a capital gain. That means 100 percent taxable, no PRE, and any loss is denied.

Narrow life-event exceptions exist (death, separation, work relocation of at least 40 km, serious illness, insolvency, birth of a child). Document everything if you rely on one.

This rule is squarely aimed at pre-construction assignments and quick flips in Mississauga, Etobicoke, and along Humber Bay Shores. CRA is actively auditing.

Rental conversions: the elections that matter

Moved out of your Etobicoke home and rented it out? A section 45(2) election can let you keep treating it as your principal residence for up to four more years.

Moving into your former rental? A section 45(3) election can defer the tax that would otherwise trigger on the change-of-use.

Both have strict deadlines. Talk to an accountant before you list, not after.

Reporting is mandatory, even when there is no tax

Since 2016, you must report a principal residence sale on Schedule 3 and Form T2091(IND) (linked: canada.ca), even when the entire gain is exempt.

Skip it and CRA can deny the exemption entirely, plus charge $100 per month in late-filing penalties up to $8,000. This is the part most homeowners do not know about.

Three GTA scenarios people get wrong

The Clarkson downsizer. Sold the family home after 25 years, bought a condo at Port Credit. Single home, single residence, gain fully exempt. Still has to file the T2091.

The Trinity Bellwoods landlord. Bought a condo in 2018 as an investment, rented it the whole time, sells in 2026 for a $250,000 gain. No PRE available. Roughly $54,000 owed in tax.

The Junction homeowner with a cottage. Semi-detached bought in 1998, Kawartha cottage bought in 2010, selling the cottage in 2026. Two designation strategies to model. The right split can save tens of thousands.

Before you list: a 5-step checklist

Pull the original Statement of Adjustments to confirm your adjusted cost base.

Add up capital improvements (roof, kitchen, additions, HVAC). These add to your cost base.

Find any change-in-use dates and get an appraisal for that date.

Confirm the 365-day rule does not apply.

Talk to your accountant before you list.

Thinking of selling a second property or rental in the GTA?

If you own a cottage, second home, or rental anywhere in Clarkson, Lorne Park, Port Credit, the Junction, Trinity Bellwoods, or the wider west Toronto / Mississauga area, the tax planning around the sale matters as much as the listing strategy. I work with clients well before they list so the timing and structure of the sale line up with what their accountant is trying to accomplish.

Book a 20-minute consultation and I will put together a list of questions to bring to your accountant based on your situation.

General information only, current as of 2026. Not legal, tax, or financial advice. Always consult a CPA before acting on the rules described above.

Sources

CRA Income Tax Folio S1-F3-C2, Principal Residence

CRA: Reporting the sale of your principal residence

CRA Form T2091(IND): Designation of a Property as a Principal Residence

CRA: Residential Property Flipping Rule

Department of Finance: Cancellation of capital gains inclusion rate increase (March 21, 2025)