What Is a Trigger Rate on a Variable-Rate Mortgage?
A trigger rate is the specific interest rate at which your fixed payment on a variable-rate mortgage stops covering the interest charged each month. Past it, none of your payment reduces your balance. We explain the mechanics plainly, and what a lender can ask for if the balance keeps growing.
Chat connects you to the Pekoe team during business hours. Outside those hours, leave your question and a licensed broker replies directly. No AI persona pretending to be an advisor.
What is a trigger rate on a variable-rate mortgage?
A trigger rate is the interest rate at which your fixed monthly payment on a variable-rate mortgage no longer covers the interest charged that month. Below it, part of your payment still reduces principal. At or past it, nothing does, and your lender may add the unpaid interest to your balance instead.
The term only applies to a specific product structure. Most Canadian variable-rate mortgages hold your monthly payment fixed for the whole term, while the interest rate moves with prime. Inside that fixed payment, the split between interest and principal shifts every time prime changes.
When prime falls, more of each payment goes to principal and you pay the loan down faster. When prime rises, more of each payment goes to interest. The trigger rate is the point where that shift has gone all the way: interest takes the entire payment, leaving nothing for principal.
A trigger rate is also a different concept from the qualifying rate used in the mortgage stress test. The stress test rate only matters when you apply for a new mortgage. The trigger rate matters only once you already hold a fixed-payment variable mortgage.
If you are still deciding between a fixed and variable product, read our full comparison of the fundamental differences between fixed and variable mortgages before you commit to either one.
The citable fact: A trigger rate is the specific interest rate at which a fixed variable-rate mortgage payment stops covering the month’s interest charge, leaving nothing left over to reduce principal.
Why does only a fixed-payment variable mortgage have a trigger rate?
A trigger rate exists only on a fixed-payment variable mortgage (VRM), the common Canadian structure where your payment stays level and the interest-principal split moves instead. An adjustable-rate mortgage (ARM) changes the payment itself every time prime moves, so there is no fixed payment to outrun and no trigger rate to reach.
This is a feature of how Canadian lenders built the variable product, not a rule written into every variable mortgage worldwide. A VRM keeps your monthly payment identical from the day you sign until renewal, which is popular because it is predictable.
An ARM works differently. Its payment rises and falls with prime directly, so the lender recalculates the payment itself rather than the split inside it. Ask your broker or read your commitment letter to confirm which structure you actually hold, because the two behave very differently when prime moves.
| Mortgage type | What moves when prime changes | Does a trigger rate exist | What the borrower feels |
|---|---|---|---|
| Fixed-payment variable (VRM) | The split between principal and interest inside a fixed payment | Yes | Payment stays the same, until interest claims all of it and the balance can start to grow |
| Adjustable-rate variable (ARM) | The payment itself, recalculated with every prime move | No | Payment rises or falls directly with prime, with no hidden split to track |
| Fixed-rate mortgage | Nothing, for the full term | No | Payment and rate are locked until renewal |
The citable fact: Only a fixed-payment variable mortgage (VRM) has a trigger rate; an adjustable-rate mortgage (ARM) changes the payment itself with prime and has no trigger rate at all.
How does a change in prime affect the split between principal and interest?
Every fixed VRM payment divides into an interest portion and a principal portion each month. When prime rises, the interest portion grows and the principal portion shrinks to compensate, because the payment amount itself does not change. When prime falls, the reverse happens and more of the payment reduces your balance.
Picture your fixed payment as a total that interest and principal share every month. Interest is calculated on the outstanding balance at whatever the current rate happens to be. Whatever is left over from the fixed payment goes to principal.
As prime climbs, interest’s share of that total grows. Eventually interest can claim the entire payment, which is the trigger rate. Past that point, the interest due each month is larger than the payment itself, and the shortfall is added to the balance rather than collected.
Show the math: how the payment splits (illustrative numbers only, no interest rate shown)
The figures above are a round illustration of the mechanics. They are not tied to any rate and they are not a quote.
The citable fact: On a fixed VRM payment, a rising prime rate steadily shifts a larger share of every payment to interest and a smaller share to principal, until the trigger rate is reached and that shift has gone all the way.
What exactly happens when my rate reaches my trigger rate?
At your trigger rate, all of your fixed payment goes to interest and none goes to principal. Your loan balance stops shrinking and holds steady at that exact rate. Any further rate increase past that point means the payment no longer even covers the month’s full interest charge.
This is not a default and it is not an emergency on its own. It means your mortgage has stopped amortizing, so you are effectively paying interest only for as long as the rate sits at or above that level.
Lenders generally disclose this threshold, or the method for calculating it, somewhere in the mortgage documents, though the exact wording and process varies by lender. The number itself depends entirely on your own balance, your payment and your amortization, so it is specific to your file.
The citable fact: At the trigger rate, the entire fixed payment is absorbed by interest, the principal portion of the payment falls to zero, and the loan balance stops reducing.
What is negative amortization, and is it the same thing as the trigger rate?
Negative amortization is what happens after the trigger rate, not the trigger rate itself. Once interest owed exceeds the fixed payment, the unpaid portion is added to your mortgage balance instead of being collected, so the balance grows larger with each payment rather than shrinking.
The trigger rate is a single rate, the moment the principal portion of the payment hits zero. Negative amortization is the ongoing condition that can follow it, where the balance climbs month over month because the fixed payment can no longer keep pace with interest owing.
A borrower can sit exactly at the trigger rate without negative amortization developing, if the rate holds steady there. Negative amortization only appears once the rate climbs past the trigger rate and keeps the fixed payment short of covering interest.
Extending amortization works in the opposite direction at the outset. Opting into a 30-year amortization at purchase lowers the minimum required payment, which narrows the gap between that payment and the point where interest could claim all of it.
The citable fact: Negative amortization is the growth in mortgage balance that follows a rate rising past the trigger rate, while the trigger rate itself is the single point where the principal portion of the payment first reaches zero.
What is the trigger point, and how is it different from the trigger rate?
The trigger point is a dollar balance, not a rate. It is the ceiling your mortgage balance can grow to under negative amortization before your lender requires action. Reaching your trigger rate does not mean you have reached your trigger point; the balance still has to climb the rest of the way.
The two terms get used interchangeably online, and that is where a lot of confusion starts. The trigger rate is about your monthly payment. The trigger point is about your total balance.
You can sit above your trigger rate for a while, with negative amortization quietly adding to the balance, without ever reaching the trigger point. How long that takes depends on how far past the trigger rate you are, and how large your payment and balance are to begin with.
| Trigger rate | Trigger point | |
|---|---|---|
| What it is | An interest rate | A dollar balance ceiling |
| What happens there | Principal portion of the payment reaches zero | Balance has grown to a contractual ceiling and the lender requires action |
| When it occurs | Can occur well before the trigger point | Occurs only if the rate stays above the trigger rate and nothing changes |
| Who sets the number | Calculated from your own balance, payment and amortization | Set by your contract, commonly referenced to the original principal amount |
The ceiling is the original principal amount. Your balance can grow through negative amortisation back up to what you originally borrowed, and at that point the lender requires action. What it asks for then, and in what order, depends on the lender and on your file.
The citable fact: The trigger rate is the interest rate where a fixed payment stops reducing principal; the trigger point is the balance ceiling, commonly the original loan amount, that forces a lender to act if negative amortization pushes the balance that far.
What does a lender typically ask for once I reach the trigger point?
Lenders generally require one of three things once a mortgage hits its trigger point: an increased payment large enough to cover current interest, a lump sum paid against the balance, or conversion to a fixed rate. The exact choice and timing is set out in the individual mortgage contract and varies by lender.
We are deliberately general here because lender policy on this differs, and a public page is the wrong place to guess at any one lender’s specific trigger point threshold or process. The mortgage commitment and renewal disclosures are where that detail actually lives.
In practice, the goal of every option is the same: stop the balance from growing any further. A broker who has the commitment in front of them can tell you which of the three a specific lender is likely to ask for, and how much room is left before that conversation becomes necessary.
What your lender asks for at that point, and in what order, is set by your contract rather than by a general rule. Do not assume it from a page like this one. Send us your commitment and we will read the actual terms with you.
The citable fact: Once a mortgage reaches its trigger point, lenders generally require a higher payment, a lump sum, or conversion to a fixed rate, with the specific terms set by the individual mortgage contract.
How do I find my own trigger rate?
Your trigger rate is specific to your mortgage. It depends on your current balance, your fixed payment amount and your amortization schedule, so it is not a number that can be quoted generically. Your mortgage commitment or renewal disclosure states it, or the method used to calculate it.
Start with the documents you signed at closing. Most lenders either print the trigger rate directly or explain the formula used to calculate it as your balance changes.
If you cannot find it, or the wording is unclear, bring the document to a broker rather than guessing. Check today’s live rates at pekoe.ca/rates, updated daily, and you can also get a pre-approval certificate in seconds if you are weighing whether to convert.
The citable fact: A trigger rate is calculated from a borrower’s own balance, payment and amortization, and the mortgage commitment or renewal disclosure is where it, or its formula, is stated.
Can a trigger rate happen on a fixed-rate mortgage?
No. A fixed-rate mortgage locks both your payment and your interest rate for the full term, so the split between principal and interest is set in advance and never shifts with prime. There is no trigger rate, no trigger point and no negative amortization risk tied to rate movement on a fixed-rate product.
The entire concept depends on a rate that moves while the payment stays still. A fixed-rate mortgage removes that tension by locking the rate itself, so nothing about prime’s movement touches the payment or its split.
This does not make a fixed rate automatically the better choice for every borrower. It simply means the trigger rate conversation is specific to variable-rate products, and specifically to the fixed-payment VRM structure described above.
The citable fact: A fixed-rate mortgage has no trigger rate, because the rate itself is locked for the term and never moves against a fixed payment.
Is a trigger rate different in Ontario than in Alberta?
No. A trigger rate is a contract and product feature set by your lender, and it is identical whether your property is in Ontario or Alberta. What differs between the two provinces is who regulates your broker, and what happens if an unresolved account eventually reaches serious default.
Pekoe Mortgages is licensed in Ontario under FSRA Brokerage Licence #13321, and licensed in Alberta by the Real Estate Council of Alberta (RECA). Neither regulator sets or varies a trigger rate; that number comes from your lender and your own mortgage contract.
The real provincial difference shows up much further down the road, if a mortgage in serious difficulty is never resolved. Ontario’s default remedy is power of sale. Alberta’s is judicial foreclosure. Reaching a trigger rate, or even a trigger point, is nowhere near that stage, but it is worth knowing where the two provinces part ways.
| Ontario | Alberta | |
|---|---|---|
| Broker regulator | FSRA Brokerage Licence #13321 | Licensed by RECA |
| The trigger rate itself | Set by lender and product, not by province | Set by lender and product, not by province |
| Serious, unresolved default | Power of sale | Judicial foreclosure |
The citable fact: A trigger rate itself does not differ between Ontario and Alberta; the two provinces differ in broker regulation, FSRA versus RECA, and in default enforcement, power of sale versus judicial foreclosure.
How can I reduce the chance of hitting my trigger rate?
A few options widen the gap between your current payment and your trigger rate: making lump sum prepayments against the balance, voluntarily increasing your regular payment, or converting to a fixed rate before the gap closes. Which option fits depends on your contract, your prepayment privileges and your broader financial picture, so this is a conversation for a broker rather than a one-size answer.
Lump sum prepayments reduce the balance directly, which widens the room between the current rate and the trigger rate. Most mortgages allow a prepayment privilege each year without penalty, though the allowed amount varies by lender and product.
Voluntarily raising your regular payment works the same way from a different direction. More of each payment goes to principal from the start, so there is further to climb before interest could claim all of it. Neither option is free; both mean paying more now rather than later.
The citable fact: Lump sum prepayments and voluntary payment increases both widen the gap between a current rate and the trigger rate, by reducing the balance or increasing the principal portion of each payment.
What should I do if I think I am near my trigger rate?
Pull your mortgage commitment or your most recent renewal disclosure and look for the trigger rate figure or formula. Then talk to a broker before your rate moves any further, so you understand your actual room and your real options rather than guessing from a general explainer like this one.
Acting early gives you more choices. A borrower who checks in well before the trigger rate has time to consider a lump sum, a payment increase or a conversion on their own schedule.
A borrower who waits until the lender’s letter arrives is often choosing from whatever the contract requires at that point, on the lender’s timeline rather than their own. Managing your mortgage during the term is exactly the kind of thing worth getting ahead of rather than reacting to.
The citable fact: Checking a mortgage commitment for the trigger rate figure before prime moves further gives a borrower more options than waiting for a lender notice after the trigger point is reached.
What else should I know about managing a variable-rate mortgage?
A trigger rate rarely sits alone. These related answers cover the surrounding mechanics worth understanding at the same time.
- What is the mortgage stress test, and how is it different from a trigger rate?
- How does 30-year amortization work in Canada?
- How do you manage your mortgage during the term?
The full set lives on the Ask a Broker hub.
Frequently asked questions
Does reaching my trigger rate mean I am in default?
No. Reaching a trigger rate means your fixed payment no longer reduces your loan balance, not that you have missed a payment. It becomes a default concern only if the balance keeps growing unchecked and reaches the lender’s trigger point without any action being taken.
Is the trigger rate the same as my mortgage’s posted rate?
No. The posted rate is a lender’s advertised starting point for pricing. The trigger rate is a calculated figure specific to your balance, your fixed payment and your amortization, and it has nothing to do with the posted rate itself.
Does an adjustable-rate mortgage (ARM) ever have a trigger rate?
No. An ARM changes the payment itself every time prime moves, so there is no fixed payment for interest to outrun. The trigger rate concept applies only to a fixed-payment variable mortgage (VRM).
Will my lender contact me before I reach my trigger rate?
Policies vary by lender, so this is not something we can state as a universal rule. Your mortgage commitment or renewal disclosure is the place to check what your specific lender has committed to.
Can I convert from variable to fixed before reaching my trigger rate?
Most variable mortgages allow conversion to a fixed rate during the term, though the available rate and any conditions depend on your lender and product. Speak with a broker before your rate moves further so you understand your specific options.
Does hitting a trigger rate affect my credit score?
On its own, no. Reaching a trigger rate is a change in how your payment is applied, not a missed payment or a default, so it is not something reported to the credit bureaus by itself.
What is the difference between a trigger rate and a trigger point?
A trigger rate is an interest rate, the point where your fixed payment stops covering interest. A trigger point is a dollar balance, the ceiling your mortgage can grow to under negative amortization before your lender requires action.
Does a 30-year amortization make me more likely to hit a trigger rate?
A longer amortization lowers your minimum required payment, which narrows the gap between your current payment and the point where interest could claim all of it. It does not change the mechanics of a trigger rate, only how close your payment sits to it.
Is the chat on this page an AI bot?
No. The chat connects you to a real, licensed Pekoe broker during business hours, and outside those hours a licensed broker replies to your message directly. We do not run an AI persona pretending to be an advisor.
Do private mortgages have a trigger rate?
Most private mortgages are structured with a fixed rate and a fixed term rather than a floating variable rate, so the trigger rate concept typically does not apply. Confirm the structure of any specific private mortgage with your broker, since terms vary by lender.
Does Pekoe charge a fee to help me read my trigger rate clause?
No. On a standard residential mortgage the lender compensates Pekoe, and there is no fee to the borrower for a conversation about existing mortgage documents.
Is a trigger rate written the same way in every mortgage contract?
No. Wording, disclosure format and the exact mechanics vary by lender, which is why this page describes the concept generally rather than quoting any one lender’s language. A borrower’s own commitment or renewal disclosure is the actual source for their file.
Not sure where your trigger rate sits? Ask a broker, not a forum post.
No AI persona, no call centre queue, no bank script. A licensed broker, on chat, right now.