What is a mortgage subordination agreement and when is it needed in Ontario?

A subordination agreement is a legal document in which a creditor with a higher-priority registration agrees to rank behind a new or different creditor. In the mortgage context, it most often arises when a property owner wants to refinance their first mortgage with a new lender while a second mortgage or other charge already exists on title.

For example, if you have a first mortgage with Lender A and a second mortgage with Lender B, and you want to replace Lender A's first mortgage with a new mortgage from Lender C, Lender C will want to rank in first position. Lender B (the second mortgage holder) would need to sign a subordination agreement confirming that it continues to rank behind Lender C's new first mortgage. Without this agreement, the registration order might become complicated or disputed.

Subordination agreements are also common in commercial real estate, particularly involving leases, construction financing, and mezzanine debt. Getting all parties to sign subordination agreements can be time-consuming and may require the subordinating party to agree to certain terms or receive compensation. Your lawyer identifies which parties need to sign, negotiates the form of the agreement, and coordinates its execution and registration as part of the transaction. This is often a detail that is easy to overlook until it becomes a closing-day issue.