Capital gains tax on Ontario real estate is governed by federal Income Tax Act rules. Your principal residence is exempt under the Principal Residence Exemption (PRE). Investment properties, secondary homes, and short-held flips are taxable. The current federal inclusion rates and the anti-flipping rule have changed the math significantly in the past two years — confirm specifics with your CPA before any big move. This article explains the framework so you ask the right questions.
In this guide, we cross-reference Closing Costs When Selling, Calculate Realtor Fees, and Fair Market Value — click through whenever you want to go deeper on a related concept.
Principal Residence Exemption (PRE)
If a property has been your principal residence for every year you owned it, the entire capital gain is exempt from tax. Only one principal residence per family per year can be designated. Even if you qualify for the full exemption, you must report the sale on Schedule 3 of your T1.
Inclusion Rate
Capital gains in Canada are added to taxable income at an inclusion rate. The federal inclusion rate has historically been 50% for individuals. Recent legislative changes have proposed adjustments above certain thresholds — the rules have shifted in 2024–2026, so confirm the current rate with a CPA at the time of your sale.
Anti-Flipping Rule
Effective January 1, 2023, residential properties sold within 365 days of purchase are presumed to be flips and the gain is taxed as fully-taxable business income (100% inclusion), not a capital gain. Limited exceptions apply (death, disability, separation, employment relocation, insolvency). This applies even to a property you lived in.
Worked Example — Investment Property Held 8 Years
Assume a Scarborough rental purchased for $500,000 in 2018, sold in 2026 for $900,000 with $50,000 in commissions and legal fees.
| Item | Amount |
|---|---|
| Sale price | $900,000 |
| Less commissions / legal | ($50,000) |
| Adjusted proceeds | $850,000 |
| Less adjusted cost base | ($500,000) |
| Capital gain | $350,000 |
| Taxable portion @ 50% | $175,000 added to income |
The $175,000 is added to your income for the year and taxed at your marginal rate (combined federal + Ontario can exceed 50% at top brackets). Your CPA may advise tax-deferral strategies before closing.
Non-Resident Sellers
Non-residents of Canada selling Ontario property face withholding under section 116 of the Income Tax Act. The buyer's lawyer typically holds back 25–50% of the purchase price until a CRA Clearance Certificate is issued. Plan this 6–8 weeks before closing.
Get Tax Advice Before You Sell
Capital gains tax is one area where the cost of an accountant pays for itself many times over. Strategies like spousal attribution, principal-residence designation across years, and timing of the disposition can move the bill by tens of thousands.
Frequently Asked Questions
Do I pay capital gains tax on my principal residence in Ontario?+
No — the Principal Residence Exemption shelters the full gain on a property that has been your principal residence for every year you owned it. You still report the sale on your T1 Schedule 3.
What is the anti-flipping rule?+
Since January 1, 2023, residential property sold within 365 days of purchase is taxed as fully-taxable business income, not a capital gain. There are limited exceptions for life events.
How is capital gain calculated?+
Sale price minus selling costs (commission, legal) minus the adjusted cost base (purchase price plus capital improvements plus original purchase costs). The result is the capital gain.
What if I sell a rental I once lived in?+
You may qualify for partial PRE for the years it was your principal residence, with a +1 year bonus. The math is fact-specific — get a CPA before you sign the Agreement of Purchase and Sale.
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