Property Tax Arrears vs. Power of Sale in Ontario: How the Two Interact

If you fall behind on both your municipal property taxes and your mortgage payments, it can feel like a single problem. Legally, it's two separate problems, run by two separate parties, under two separate processes — and either one, on its own, can put your home at risk. Understanding how a municipal tax sale and a lender's power of sale actually differ is the first step to figuring out which threat is more urgent and what your options are.

This article walks through both processes, how they relate to each other, and what to do if you find yourself facing pressure from more than one direction at once.

Two Separate Legal Processes, One Property at Risk

A municipal tax sale is initiated by your local municipality to recover unpaid property taxes. A power of sale is initiated by a mortgage lender to recover an outstanding loan secured against your home. They arise from completely different debts, follow different procedures, and are controlled by different parties — a municipality in one case, a private lender or financial institution in the other.

Importantly, unpaid property taxes and mortgage arrears are not automatically linked. You can be current on your mortgage but behind on taxes, or the reverse. Many mortgage lenders require an escrow arrangement where property taxes are collected with each mortgage payment and remitted to the municipality on your behalf specifically to prevent tax arrears from building up — but not every mortgage is structured that way, and taxes can still fall behind.

How a Municipal Tax Sale Works

1. Taxes go unpaid over an extended period. A single missed instalment doesn't trigger a tax sale — municipalities generally allow a meaningful period of continued non-payment before escalating.
2. The municipality registers a formal notice against title. This creates a public record of the tax arrears and starts a further waiting period.
3. The municipality gives notice of an impending sale. Owners, and anyone else with a registered interest in the property (including mortgage lenders), typically receive notice before a sale proceeds.
4. The property may be sold or vested to recover the debt, if the arrears (plus applicable costs) remain unpaid through the process.

Because a mortgage lender has its own financial interest in the property, lenders are typically notified of tax arrears and will often step in — paying the taxes and adding the cost to your mortgage balance — specifically to prevent a tax sale from proceeding and jeopardizing their own security.

How a Lender's Power of Sale Works

1. You fall behind on mortgage payments. The lender's specific remedies and timelines are set out in your mortgage agreement and in Ontario law governing mortgage enforcement.
2. The lender issues formal notice. Ontario law requires a lender to give the borrower formal written notice of the default and the intended remedy before proceeding.
3. A redemption period follows. During this period, you generally have the right to cure the default — by paying the arrears, not the full loan balance — and stop the process.
4. If the default isn't cured, the lender can market and sell the property. Unlike foreclosure in some other jurisdictions, power of sale in Ontario is a sale process, not an automatic transfer of ownership to the lender, and any surplus after the lender and other registered charges are paid must go to the homeowner.

The exact notice periods, required content of the notice, and procedural steps involved are set out in your mortgage documents and in Ontario's mortgage remedies law — confirm the specifics that apply to your mortgage with a lawyer rather than relying on a general timeline.

Can Both Happen at Once?

Yes. Because a tax sale and a power of sale are independent processes with different triggers, it's possible — though not typical — for both to be in motion on the same property at the same time. In practice, this scenario often resolves itself: a mortgage lender with an active or looming power of sale usually has a strong incentive to pay off tax arrears directly, since unpaid taxes and tax sale proceedings can undermine the security the lender is relying on, and a tax sale can proceed regardless of whether a mortgage exists.

What to Do If You're Behind on Both

• Don't assume one problem cancels out the other. Falling behind on your mortgage doesn't pause a tax sale, and vice versa — each moves on its own timeline.
• Contact your municipality directly about the taxes. Municipalities generally have processes for entering into a payment arrangement before matters escalate to a sale.
• Contact your mortgage lender before they contact you. Lenders are often more willing to work with a borrower who reaches out proactively about a temporary hardship.
• Get legal advice early. A lawyer can review your specific notices, deadlines, and options — including whether refinancing, selling voluntarily, or negotiating a repayment plan is realistic before either process concludes.
• Act inside whatever redemption or notice period you've been given. These processes typically preserve an opportunity to cure the default before a sale is finalized, but that opportunity has a hard cutoff.

Frequently asked questions