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Unpaid Property Taxes in Ontario: When Can the City Sell Your Home?

Learn how an Ontario tax sale works: when a tax arrears certificate is registered, the one-year cancellation price window, and how to stop a sale.

Real Estate4 min readTSLBy the Treadstone Law Team · OntarioUpdated November 1, 2026
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Key takeaways
  • A municipal treasurer may register a tax arrears certificate on title if any tax arrears are still owing on January 1 in the second year after the year the taxes became owing.
  • The owner or anyone else can stop a tax sale by paying the cancellation price within one year of registration.
  • An extension agreement with the municipality can give more time, and while it is in force that time is not counted toward the tax-sale periods.

Falling behind on property taxes can feel manageable at first, because the bills keep coming and nothing dramatic seems to happen. In Ontario, though, unpaid taxes can eventually lead to a municipality selling the property. The process has set steps and timelines, and there are usually chances to stop it.

This article walks through the tax-sale timeline under the Municipal Act, 2001, who can step in to pay, and what you can do if you or a family member is behind. Procedure and costs vary by municipality, so treat this as a general guide.

When the municipality can start the process

A municipal treasurer may register a tax arrears certificate against a property in a local municipality if any part of the tax arrears is still owing on January 1 in the second year after the year the taxes became owing.

In plain terms, you do not lose the right to sort things out the moment a bill is missed. There is a period of time before the certificate can be registered. But once any part of the arrears is still unpaid on that January 1 date, the municipality can move ahead. Timing can differ for property in unorganized territory, which this article does not cover.

The one-year window after registration

After a tax arrears certificate is registered, the owner or anyone else can stop a tax sale by paying the cancellation price within one year of registration.

The cancellation price covers all tax arrears, current taxes, interest, penalties and reasonable municipal costs. Because costs and interest keep adding up, the amount owing is usually higher than the original missed bills. If the cancellation price is unpaid when the year ends, the land is offered for sale by public auction or tender.

StageWhat happens
Arrears still owing on January 1 of the second year after the taxes became owingTreasurer may register a tax arrears certificate
Within one year of registrationOwner or anyone else can pay the cancellation price to stop the sale
Cancellation price unpaid when the year endsLand is offered by public auction or tender

Extension agreements

A municipality may make an extension agreement giving more time to pay the cancellation price. It may do so with the owner, the owner's spouse, a mortgagee, a tenant in occupation or another interested person.

While the agreement is in force, that time is not counted toward the tax-sale periods. Whether a municipality will offer one, and on what terms, depends on its own practices, so ask the tax office directly and get any agreement in writing.

Who can step in to help

The right to pay the cancellation price is not limited to the owner. Anyone can pay it to stop a sale. That matters for families, because a spouse, adult child or other relative may be able to protect the home.

If you are paying on someone else's behalf, think about how you will be repaid or protected, and consider speaking with a lawyer first.

What to do next

Procedure, costs and available options vary by municipality, so confirm the details with your own municipality and a lawyer.

Frequently asked questions

How long do I have to pay after a tax arrears certificate is registered?

You have one year from registration to pay the cancellation price and stop a tax sale. If it is unpaid when the year ends, the land is offered for sale by public auction or tender.

What does the cancellation price include?

It covers all tax arrears, current taxes, interest, penalties and reasonable municipal costs. Ask the municipality for an up-to-date figure, since the amount can change.

Can someone other than the owner pay to stop the sale?

Yes. The owner or anyone else can pay the cancellation price within the one-year period. A family member may wish to get advice first about protecting their own interests.

Can I get more time to pay?

A municipality may make an extension agreement with the owner, the owner's spouse, a mortgagee, a tenant in occupation or another interested person. While it is in force, that time is not counted toward the tax-sale periods. Terms vary by municipality.

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. Ontario 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 licensed Ontario lawyer. Treadstone Law is licensed by the Law Society of Ontario — reach us at 1-844-900-1070 or start a file online.

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