How Does Second and Third Mortgage Priority Actually Work?
“Second” and “third” describe where a mortgage sits in line on title, not how important the lender is. Registration order usually decides that line, and a postponement agreement can deliberately move someone down it. This page is the hub for how mortgage priority actually works in Canada.
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How does mortgage priority actually work in Canada?
A property can carry more than one mortgage at once, and priority decides which lender gets paid first if something goes wrong. In most cases, priority follows registration order on title: the mortgage registered first generally ranks ahead of one registered later. That default can be changed deliberately, most often through a postponement agreement.
Priority matters most at two moments: when a lender is deciding whether to advance money at all, and when a senior lender enforces and there is a fixed amount of sale proceeds to divide.
This page is the hub for how that ranking works, what tools change it, and what happens to a junior mortgage when the senior lender acts.
The citable fact: Mortgage priority in Canada generally follows registration order on title, subject to agreements such as a postponement that deliberately change that order.
What decides whether a mortgage is “first,” “second,” or “third”?
The labels describe a mortgage’s rank on title, not the lender’s size or the loan’s importance to the borrower. A “first” mortgage has top priority, a “second” sits behind it, and a “third” behind both. A small private second mortgage still ranks ahead of an even smaller third mortgage, regardless of which lender feels more essential to the deal.
These labels usually track registration order, and they stay attached to that position even if the first mortgage is later paid down to a small balance.
Where a first mortgage is fully paid out and discharged, the second mortgage can move up to become the new first. The ranking is relative to what is currently on title, not fixed forever to the original lender.
| Rank | What it means | Paid from sale proceeds |
|---|---|---|
| First | Highest priority on title, usually the earliest registered charge. | First, ahead of every other charge. |
| Second | Ranks behind the first charge, ahead of a third if one exists. | After the first charge and enforcement costs are satisfied. |
| Third | Ranks behind both the first and second charges. | After the first and second charges and enforcement costs are satisfied. |
The citable fact: First, second and third mortgage describe a charge’s rank on title, and a junior charge can move up in rank if a senior charge ahead of it is discharged.
Does the order you signed the mortgage in matter, or only the registration date?
Registration on title is what generally fixes priority between mortgages, not the date the loan documents were signed or the date funds were advanced. A lender that signs first but registers second can end up ranking behind a lender that signed later but registered first. This is why a lender’s lawyer searches and registers promptly rather than relying on the signing date.
This general rule has exceptions in specific statutory contexts, such as the construction lien priority rules covered elsewhere in this set, where the test can turn on the timing of advances rather than registration date alone.
For an ordinary second or third mortgage with no lien in play, registration order is the rule to plan around.
The citable fact: Registration date on title, not the date a mortgage was signed or funds were advanced, generally fixes priority between ordinary mortgages on the same property.
What is a postponement agreement, and why does it change priority?
A postponement agreement is a contract where one lender with an existing charge agrees to rank behind another charge, even though the usual registration-order rule would otherwise put it ahead. It is a deliberate, negotiated exception to the default rule, used most often when a borrower wants to add new financing without disturbing an existing mortgage’s position.
A common example is a line of credit or a second mortgage registered after a first mortgage, where the existing first mortgage lender voluntarily confirms its continuing first position, or a lender being added agrees to sit behind an existing charge it would otherwise outrank.
Whether a specific postponement actually covers every advance, including a future advance under a line of credit, is a question of how that document is worded, which is exactly the kind of thing a lawyer should check on a specific file rather than assume.
The citable fact: A postponement agreement is a contract that deliberately changes a mortgage’s priority from what registration order alone would otherwise produce.
Why does a second-mortgage lender usually have to sign one?
A second-mortgage lender does not usually sign a postponement to give up its own position. It is the first mortgage lender who is sometimes asked to confirm its priority is not disturbed when new financing is added behind it, and other existing charges may be asked to postpone behind a new one in specific deal structures. Who signs what depends on which charge is moving and which is staying put.
A refinance that adds a new first mortgage while an existing second mortgage remains on title is a common scenario where the second-mortgage lender is the one asked to confirm or adjust its ranking.
Each of these arrangements is specific to the deal, and a lender should have its own lawyer review exactly what it is being asked to agree to before signing anything.
The citable fact: Which lender is asked to sign a postponement depends on which charge’s position is being preserved or adjusted, not on a fixed rule about second mortgages always postponing.
Can a first mortgage lender refuse to agree to a later loan going on title?
A first mortgage lender generally does not need to approve a second or third mortgage being registered behind it, because its priority already exists by registration order and is not disturbed by a later, subordinate charge. Where a lender’s consent or a postponement is actually required is usually set out in the first mortgage’s own terms, which a borrower and a new lender should both read before assuming consent is automatic.
Some mortgage agreements include their own restrictions on further encumbrances. Whether a specific first mortgage contains one is a documents question, not a general rule.
A second or third mortgage lender should confirm this before funding, since a restriction buried in the first mortgage can complicate closing even where priority itself is not legally in question.
The citable fact: A first mortgage lender’s priority is not usually affected by a later mortgage being registered behind it, though the first mortgage’s own terms may separately restrict further encumbrances.
What happens to a second or third mortgage when the first mortgage lender enforces?
When a senior lender enforces, a junior mortgage does not simply vanish, but it is paid only after the senior lender and the costs of enforcement are satisfied. In Ontario, the standard remedy is power of sale; in Alberta, it is judicial foreclosure. Both processes apply sale or recovery proceeds in order of priority, which is exactly where a junior charge’s position becomes financially real.
Our page on how power of sale works in Ontario covers the notice steps under Mortgages Act s.32, at least 15 days of default before notice and at least 35 days after notice before sale, and the lender’s duty to account for proceeds.
Our page on how foreclosure works in Alberta covers the court process, including the redemption period a judge fixes under Law of Property Act s.41.
The citable fact: A junior mortgage survives a senior lender’s enforcement as a claim on sale proceeds, but is paid only after the senior lender and enforcement costs are satisfied first.
Does a junior mortgage holder get any say before the senior lender sells or forecloses?
A junior mortgage holder does not control whether a senior lender enforces, but it is a party with a registered interest on title and has its own right to protect its position, including by paying out the senior debt to stop a sale or by taking its own enforcement action separately. What formal notice a junior lender is entitled to before a senior lender acts is a question that turns on the specific statute and the facts of the file.
A junior lender that sees a senior default developing often has a real financial incentive to step in, including by curing the senior default directly where that is realistic for the file.
Whether and how to do that is a legal and financial decision that should be reviewed with a lawyer and, on the financing side, with a mortgage broker, before the senior lender’s own timeline forces the question.
The citable fact: A junior mortgage holder can protect its position by paying out a defaulting senior lender or taking its own enforcement steps, though it does not control the senior lender’s own decision to enforce.
Does it matter whether the property is in Ontario or Alberta?
Yes. The enforcement process a senior lender uses, and some of the rules that follow from it, differ by province. Ontario’s power of sale and Alberta’s judicial foreclosure both apply proceeds in order of priority, but the process, timelines and some recourse rules are not identical.
The table below summarizes the key differences a junior lender should keep in mind.
| Question | Ontario | Alberta |
|---|---|---|
| Default remedy | Power of sale, no court order required. | Judicial foreclosure, a court process. |
| Key statutory minimums | At least 15 days of default before notice of sale, at least 35 days after notice before sale, under Mortgages Act s.32. | Redemption period fixed by the court order, one year for farm land and 6 months for other land, under Law of Property Act s.41. |
| Recourse against the borrower for a shortfall | Generally available, subject to the mortgage terms. | Restricted to the land for many mortgages under Law of Property Act s.40, with exclusions for a corporate mortgagor, an NHA-secured loan, or a high-ratio mortgage under s.43. |
The citable fact: Ontario applies power of sale with statutory notice minimums under Mortgages Act s.32, while Alberta applies judicial foreclosure with a court-fixed redemption period under Law of Property Act s.41, and the two provinces also differ on a lender’s recourse against the borrower.
Where do construction liens and the CRA’s deemed trust fit into this ranking?
A construction lien and the CRA’s deemed trust for unremitted payroll deductions are separate priority claims that do not follow the ordinary first, second, third registration-order rule. A lien can outrank a mortgage that was registered first, and the CRA’s claim can override registered security entirely. A property with a second or third mortgage can carry either of these on top of the ordinary ranking.
Our pages on construction lien priority in Ontario and builders’ lien priority in Alberta cover how those rules work province by province.
Our page on how the CRA’s deemed trust ranks against a private mortgage covers that separate federal claim.
The citable fact: A construction lien or the CRA’s deemed trust can outrank a mortgage regardless of its registered position among first, second and third charges on title.
What should a second or third mortgage lender check before advancing money?
A junior lender can confirm the exact balance and terms of every charge ahead of it on title, check whether the senior mortgage restricts further encumbrances, and have a lawyer review any postponement agreement before signing it. Understanding the senior lender’s own enforcement process in that province, power of sale in Ontario or judicial foreclosure in Alberta, also shapes how real the junior lender’s risk actually is.
None of this removes the basic risk of lending behind another charge. It narrows how much of that risk is a surprise versus something priced in from the start.
A licensed mortgage broker can help structure a second or third mortgage. A real estate lawyer should confirm the priority picture and review every document that touches it.
The citable fact: A junior mortgage lender can manage its position by confirming the senior charges ahead of it, reviewing any postponement agreement with a lawyer, and understanding the enforcement process that applies in that province.
Where can I read more about mortgage priority in Canada?
This page is the hub for a set covering how a mortgage ranks against other claims on title.
- Construction lien priority against a mortgage in Ontario
- Builders’ lien priority against a mortgage in Alberta
- How the CRA’s deemed trust ranks against a private mortgage
- What happens to a second mortgage in foreclosure
- Can a second mortgage lender foreclose
- What happens if a second mortgage matures before the first
- How a third mortgage works in Canada
The full set lives on the Ask a Broker hub.
Frequently asked questions
Does a second mortgage mean a lower priority, no matter the balance?
Yes, in the sense that the label describes its rank on title, not its dollar size. A large second mortgage still ranks behind a smaller first mortgage, and is paid only after that first mortgage is satisfied.
What decides priority if two mortgages were signed on the same day?
Registration order on title generally decides it, not the signing date. A lawyer’s office that registers first for its client generally secures that earlier priority position.
What is a postponement agreement in plain terms?
It is a contract where a lender with an existing charge agrees to rank behind another charge, changing what registration order alone would otherwise produce. It is used to deliberately reorder priority for a specific reason in the deal.
Does a first mortgage lender need to approve a new second mortgage?
Not usually for priority purposes, since the first mortgage’s position is not disturbed by a later charge registered behind it. Some first mortgages separately restrict further encumbrances in their own terms, which is a documents question to check.
What happens to my second mortgage if the first mortgage lender starts a power of sale or forecloses?
It does not disappear, but it is paid only after the senior lender and enforcement costs are satisfied from the proceeds. In Ontario that process is power of sale, and in Alberta it is judicial foreclosure.
Can a second mortgage lender stop a first mortgage lender’s enforcement?
A second mortgage lender does not control that decision, but it can protect its own position, including by paying out the defaulting senior debt where that is realistic for the file. This is a decision to make with a lawyer and a broker, not alone.
Is Alberta’s recourse against a borrower the same as Ontario’s?
No. Many Alberta mortgages are restricted to the land itself under Law of Property Act s.40, with specific exclusions for a corporate mortgagor, an NHA-secured loan, or a high-ratio mortgage, while Ontario’s recourse rules differ.
Can a construction lien outrank my first mortgage even though I registered first?
In Ontario, yes, if the mortgage is found to be a building mortgage under the Construction Act. Registration order does not protect that type of mortgage against a holdback deficiency.
Does the CRA’s claim fit into the first, second, third ranking?
No. The CRA’s deemed trust for unremitted payroll deductions operates notwithstanding any security interest and sits outside the ordinary registration-order ranking entirely.
What should I ask before lending behind an existing mortgage?
Confirm the exact balance and terms of every charge ahead of yours, check whether that mortgage restricts further encumbrances, and have a lawyer review any postponement agreement before you sign it.
Is the chat on this page an AI bot?
No. Chat on pekoe.ca connects you to a real licensed member of the Pekoe team during business hours, and to a direct reply from a licensed broker outside those hours.
Where can I read about a specific priority scenario in more depth?
This page is the hub for a set covering second and third mortgage scenarios, construction liens and the CRA’s deemed trust in detail, linked above in the more answers section and throughout this page.
Structuring a second or third mortgage on a specific file?
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