What Happens to a Second Mortgage When the First Lender Starts Power of Sale in Ontario

Holding a second mortgage on a property already puts you behind another lender in line. When that first lender starts a power of sale because the borrower has defaulted, the second mortgagee's position gets more precarious — and more procedurally specific — very quickly.

If you hold a second mortgage and the first mortgagee is enforcing, or you're considering lending in second position and want to understand the risk, here's how priority actually plays out.

Priority in a Nutshell

Mortgages registered against the same property generally rank by the order in which they were registered on title (subject to any agreement between the lenders that changes that order — a postponement, for example). The first mortgage ranks ahead of the second mortgage, which ranks ahead of any third mortgage, and so on. Priority determines who gets paid first out of sale proceeds if the property is sold to satisfy the debt — it does not depend on who lent the most, or who defaults first.

What Triggers a Power of Sale

A power of sale is a contractual and statutory remedy available to a mortgagee when the borrower defaults on the mortgage — most commonly by missing payments. It lets the lender sell the property to recover what's owed, without going through a full court foreclosure process. Ontario's Mortgages Act sets out the framework, including required notice before a sale can proceed.

Critically, it's usually the first mortgagee who moves first, since they're the one with the largest, most immediate stake and the strongest priority position. A default that triggers the first mortgagee's power of sale doesn't necessarily mean the second mortgagee is also in default under their own mortgage — but the second mortgagee's security is directly at risk regardless, because the property underlying both mortgages is about to be sold.

What Notice the Second Mortgagee Is Entitled To

Subsequent (junior) mortgagees registered on title are generally entitled to notice when a prior mortgagee begins enforcement proceedings, so they have an opportunity to protect their interest — for example, by paying out the arrears on the first mortgage themselves to stop the sale, or by taking their own enforcement steps. The exact notice requirements and timing are set out in the Mortgages Act and the relevant mortgage documents; if you're a second mortgagee, confirm the current notice requirements with a lawyer rather than assuming a specific timeline.

Where the Sale Proceeds Actually Go

When the property sells under the first mortgagee's power of sale, the proceeds are applied in order of priority, roughly as follows:

1. Costs of the sale itself — legal fees, real estate commissions, and other expenses of conducting the power of sale.
2. The first mortgage — principal, interest, and any costs the first mortgagee is entitled to recover under their mortgage.
3. The second mortgage — whatever is left, up to the amount owed to the second mortgagee.
4. Any remaining surplus — to the borrower, or to any lower-priority claimants against the property.

As an illustration only: if a property sells for $600,000, the costs of sale and the first mortgage together absorb $520,000, and the second mortgagee is owed $150,000, only $80,000 remains for the second mortgagee — leaving a $70,000 shortfall on paper, even though the sale generated real proceeds.

What's Left of the Second Mortgage Debt

If the sale proceeds aren't enough to fully repay the second mortgage, the second mortgagee doesn't simply lose the shortfall by default. If the borrower gave a personal covenant to repay (a personal promise to pay, separate from the security itself — common in most mortgage documents), the second mortgagee can generally still pursue the borrower personally for the unpaid balance, the same way any unsecured creditor would, once the security itself has been exhausted. Whether that pursuit is worthwhile depends heavily on the borrower's other assets and ability to pay.

Protecting a Second Mortgage Position

• Confirm the exact amount, terms, and standing of the first mortgage before you lend in second position — your risk is directly tied to how much equity actually sits behind that first mortgage.
• Understand your notice rights and what steps you can take (such as paying out first-mortgage arrears) if the first mortgagee starts enforcement.
• Have a lawyer review the mortgage documents for both the security and the personal covenant, so you understand your full range of remedies, not just your registered interest in the property.

Frequently asked questions