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№ ix Tax

Penalty for Not Reporting a Home Sale to the CRA in Canada

Forgot to report the sale of your principal residence? Learn how the CRA late-designation penalty works in Canada, how it is calculated and how to fix it.

Tax5 min readTSLBy the Treadstone Law Team · CanadaUpdated November 1, 2026
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Key takeaways
  • Since the 2016 tax year, selling a principal residence must be reported on Schedule 3 even if the whole gain is exempt.
  • If the CRA accepts a late designation, a penalty may apply, worked out under the Income Tax Act as the lesser of $8,000 and $100 for each complete month between the due date and the date of the application, and the Minister may waive or cancel penalties if asked within ten calendar years after the tax year ends.
  • If you forgot, you ask the CRA to amend the return for the year of sale, and the CRA may accept a late designation in certain circumstances.

You sold your home, assumed it was tax-free and did not mention the sale on your return. Months or years later, you learn that the sale should have been reported. It is a common mistake, and it is natural to worry about what it will cost.

This article explains what the reporting rule is, how the late-designation penalty is worked out, and the general steps for correcting the return. Your facts matter, so a lawyer or accountant can confirm how the rules apply to you.

This article covers Canadian federal tax law, which applies in every province.

Why a tax-free sale still has to be reported

Since the 2016 tax year, the sale (or deemed sale) of a principal residence must be reported on Schedule 3 of the T1 return, even if there is no gain or the whole gain is exempt. The CRA allows the exemption only if the disposition and the designation are reported.

In practice, this means the exemption is not automatic. Reporting the sale and designating the property is what secures it.

The capital gain is the proceeds of disposition minus the adjusted cost base and the outlays and expenses of the sale, and half of the capital gain is taxable. The adjusted cost base is generally the property's cost plus expenses to acquire it, such as commissions and legal fees, plus capital expenditures such as additions and improvements; current expenses such as maintenance and repairs cannot be added. A home is personal-use property, so if you have a loss on the sale you cannot claim it.

How the late-designation penalty is calculated

The late-election penalty is the lesser of $8,000 and $100 multiplied by the number of complete months between the due date and the date of the application. The formula comes from the Income Tax Act, and a penalty may apply when a late designation is accepted.

Months latePenalty rule
Fewer months$100 for each complete month
Many monthsCapped at $8,000

Because the penalty depends on complete months, the longer you wait, the larger it can become, up to the cap. The Minister may also waive or cancel penalties or interest if the request is made within ten calendar years after the tax year ends.

How a late designation is made

If you forget to designate in the year of sale, you ask the CRA to amend the return for that year. The CRA may accept a late designation in certain circumstances, but a penalty may apply. The Minister may extend the time if the request is made within ten calendar years after the tax year ends.

The designation itself is made on Schedule 3, by ticking box 1 at line 17900 if the home was your principal residence for all years owned, or all but one, or box 3 if it was not the residence for every year owned. Individuals calculate the gain on Form T2091(IND), and only page 1 needs completing if the property was the principal residence for all years owned, or all years except one.

If a home was your principal residence for all years owned except one, the extra year in the formula means the whole gain is exempt. It lets you designate the sold home for the year of sale when you also bought another home that year. That extra year is not available if you were not a Canadian resident in the year you bought the new property.

Things that can complicate a late fix

What to do next

Frequently asked questions

Do I have to report the sale if there is no gain?

Yes. Since the 2016 tax year, a sale of a principal residence must be reported on Schedule 3 even if there is no gain or the whole gain is exempt.

What is the maximum late-designation penalty?

The penalty is the lesser of $8,000 and $100 multiplied by the complete months between the due date and the date of the application. So $8,000 is the ceiling under that formula.

Can the penalty be cancelled?

The Minister may waive or cancel penalties or interest if the request is made within ten calendar years after the tax year ends. Whether that happens depends on the facts.

Is there a time limit for fixing it?

The Minister may extend the time if the request is made within ten calendar years after the tax year ends. It is better to act as soon as you notice the omission.

Sources

Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Canadian laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a tax lawyer or accountant. Reach us at 1-844-900-1070 or send our Team a message.

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