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Tenants in Common Mortgage in Ontario: What If One Owner Stops Paying?

If your co-owner stops paying the mortgage, you may still owe the whole debt. Learn how Ontario lenders, power of sale and partition can affect you.

Real Estate5 min readTSLBy the Treadstone Law Team · OntarioUpdated November 1, 2026
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Key takeaways
  • When several owners sign a mortgage, each can be liable for the whole debt unless the charge says otherwise.
  • Before power of sale, a default must continue at least 15 days before notice, and the sale cannot happen until at least 35 days after notice.
  • A co-owner can generally apply to court for partition or sale, and the court refuses only in limited circumstances.

You bought a property with a friend, relative or partner, and the mortgage payments were meant to be shared. Now the other owner has stopped paying, and the lender is looking at you.

This article explains how shared mortgage liability generally works in Ontario, what the lender can do, and what options a co-owner may have. Your own charge and ownership documents matter a great deal, so treat this as a map rather than a verdict.

Owning together and owing together

Unless the transfer shows an intention to create a joint tenancy, land granted to two or more people goes to them as tenants in common, even if they are spouses. Each owner holds a share, but ownership of the land and responsibility for the mortgage are separate questions.

Where there are several chargors, the covenants implied in a registered charge, including the promise to pay the mortgage money, are made by the chargors jointly and severally, unless the charge says otherwise. In plain terms, each co-owner can be liable for the whole debt, not just half. How a private deal with your co-owner about who pays what affects the lender's claim depends on your situation, so it is worth confirming with a lawyer.

What the lender can do after a default

Lenders must follow a process before selling under a power of sale. The default must continue for at least 15 days before notice is given, and the sale cannot happen until at least 35 days after notice. Notice goes by personal service or registered mail.

During the notice period, no further proceeding to enforce the mortgage may be started without a Superior Court of Justice judge's order. The exact steps and timing in your case depend on the wording of your charge, so check it as soon as you learn of a problem.

StepWhat the rule says
Default continuesAt least 15 days before notice is given
Notice deliveredPersonal service or registered mail
Earliest saleAt least 35 days after notice
Other enforcement during noticeNeeds a Superior Court of Justice judge's order

If some of the owners hold as joint tenants rather than tenants in common, registering a charge signed by fewer than all the joint tenants does not automatically sever the joint tenancy. Severance occurs if the chargee later exercises power of sale or forecloses after default.

Your options as the paying co-owner

A mortgagor may cure a default by performing the covenant or paying the amount due, which relieves them of the consequences of the default. Many co-owners choose to bring the account current to protect the property and their credit, then deal with their co-owner separately.

If the co-owner relationship has broken down, another route is partition or sale. Joint tenants and tenants in common may be compelled to make or suffer partition or sale of the land. Any person interested in land in Ontario may bring an action or application for partition, and the court may order a sale instead if that is more advantageous.

The Court of Appeal for Ontario holds that co-owners have a prima facie right to force a sale under the Partition Act. The party resisting must show why the property should not be sold, and the court refuses only if the applicant is acting maliciously, vexatiously or oppressively. Age, illness and claimed hardship were not enough in Inniss v. Blackett.

Spouses and the matrimonial home

A spouse may not dispose of or encumber an interest in a matrimonial home unless the other spouse joins or consents, has released their rights by separation agreement, or a court order authorizes it. A transaction in breach may be set aside. If the home is shared with a spouse as well as a co-owner, this rule affects what can be done with a share.

If a spouse dies owning a matrimonial home as a joint tenant with someone other than the other spouse, the joint tenancy is deemed severed immediately before death. How a partition application fits with a separation depends on your situation, so it is worth raising with a lawyer early.

Whether one tenant in common can mortgage only their own share depends on legal principles worth confirming with a lawyer.

What to do next

Frequently asked questions

Can the lender come after me for the other owner's missed payments?

Often yes. When there are several chargors, the implied promise to pay is made jointly and severally unless the charge says otherwise, so each co-owner can be liable for the whole debt.

How long before a lender can sell under power of sale?

The default must continue at least 15 days before notice is given, and the sale cannot happen until at least 35 days after notice. Your charge may add its own terms, so read it.

Can I stop the process by paying?

A mortgagor may cure a default by performing the covenant or paying the amount due, which relieves them of the consequences of the default. A lawyer can confirm the exact amount and steps for your situation.

Can I force my co-owner to sell?

A co-owner can apply for partition or sale, and the Court of Appeal for Ontario treats the applying co-owner as having a prima facie right to a sale. The court refuses only if the applicant is acting maliciously, vexatiously or oppressively. Special rules apply to inherited land and matrimonial homes.

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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