Did you know 'variable-rate mortgage' means two different things?
Ask ten Canadian homeowners what a variable-rate mortgage is and nine will describe the same thing: a rate that moves with prime. That's correct, but it hides a much bigger split. Canadian variable mortgages come in two structurally different flavours — ARM (Adjustable Rate Mortgage) and VRM (Variable Rate Mortgage).
Same rate on paper, same discount off prime, same lender advertising — but two very different experiences the moment the Bank of Canada changes the overnight rate. Which one you have determines what happens to your payment, your amortization, and your risk profile the next time prime moves.
ARM vs VRM — side by side
The single easiest way to see the difference: put them next to each other. Same rate, same mortgage — different mechanics. And by lender count, ARM is actually the more common product in Canada — the VRM camp just contains the biggest household-name banks, which is why most Canadians assume 'variable' means VRM.
| Attribute | ARM — Adjustable Rate Mortgage Scotiabank + most monolines: First National, MCAP, RMG, Equitable Bank, and others | VRM — Variable Rate Mortgage TD, BMO, CIBC, RBC, National Bank, Manulife Bank, and most credit unions |
|---|---|---|
| Payment when prime moves | Payment adjusts immediately | Payment stays the same |
| Amortization | Stays exactly on schedule | Stretches when rates rise, shrinks when rates fall |
| Trigger rate | None — payment always covers interest | Yes — payment can fall short of interest owed |
| Renewal shock risk | Low — you've been paying the true cost all along | Can be high — renewal payment resets to catch up |
| Negative amortization risk | None | Possible during aggressive hiking cycles |
| Cash-flow predictability | Lower — payment moves in real time | Higher — payment stays flat until trigger |
| Compounding convention | Semi-annual only at Scotiabank and Strive Capital; every other ARM monoline (First National, MCAP, RMG, Equitable, etc.) compounds monthly | Monthly at most banks; RBC compounds at your payment frequency |
| Payment at the same nominal rate | Lowest at Scotia and Strive (semi-annual); the same as a monthly-compounded VRM at every other ARM monoline | Same as a monthly-compounded ARM at TD/BMO/CIBC/National/Manulife; highest at RBC (payment-frequency compounding) |
| Lump-sum reset risk | None — amortization stays on schedule, so lenders never demand a lump sum to reset it | Yes — if amortization stretches past the original schedule, some lenders require a large lump-sum payment to reset it back, on top of the payment increase |
| Who this fits | Borrowers with flexible income who want transparent cost | Borrowers who prioritize stable monthly cash flow |
ARM — Adjustable Rate Mortgage (Scotiabank + most monolines)
On an ARM (Adjustable Rate Mortgage), the payment moves every time prime moves. Prime goes up 0.25% — your payment goes up the next cycle. Prime drops — your payment drops. The interest portion of every payment stays proportional to the rate, and the principal portion stays roughly consistent, so your amortization stays exactly on the schedule you signed for.
Scotiabank is the only Big Five bank whose main variable product is a true ARM — but Scotia is far from alone. Most broker-channel monolines run ARM as their default variable product too: First National, MCAP, RMG, Equitable Bank, and others. By lender count, ARM is actually the more common variable structure in Canada; the VRM side just contains the largest household names.
- →Pro — payment adjusts every time prime changes, so you always know your true cost.
- →Pro — amortization stays on schedule; the mortgage pays off when the contract says it will.
- →Pro — no trigger rate, no negative amortization, no payment shock at renewal.
- →Pro — at Scotiabank and Strive Capital, semi-annual compounding produces the lowest payment at the same nominal rate; every other ARM monoline compounds monthly, so the payment matches a monthly-compounded VRM at the same rate.
- →Con — monthly cash flow is exposed to Bank of Canada moves in real time.
VRM — Variable Rate Mortgage (TD, BMO, CIBC, RBC, National Bank, Manulife Bank, credit unions)
On a VRM (Variable Rate Mortgage), the interest rate floats with prime but the payment stays fixed. When prime rises, more of each payment is diverted to interest and less goes to principal, which quietly stretches out the amortization. When prime falls, more goes to principal and the mortgage pays off faster than scheduled.
TD, BMO, CIBC, RBC, National Bank, Manulife Bank, and essentially every Canadian credit union run VRMs. Fewer lenders in this camp than in the ARM camp, but they're the biggest household names — so this is the product most Canadians actually have when they say 'variable.'
- →Pro — payment stays the same when prime moves, so cash flow is predictable in the short term.
- →Pro — easy to budget around; you know exactly what leaves your account each month.
- →Con — amortization stretches when rates rise and shrinks when rates fall (invisible to you until statement time).
- →Con — every VRM has a trigger rate: the point at which the fixed payment no longer covers even the interest. Hit it and the lender requires a higher payment, a lump-sum, or a switch to fixed.
- →Con — renewal shock: if amortization stretched during a rising-rate cycle, the renewal payment can jump significantly to bring the mortgage back on track.
- →Con — payment shock mid-term: when the fixed payment can no longer keep amortization inside the original schedule, the lender resets the payment upward — sometimes sharply — before renewal.
- →Con — lump-sum reset requirement: several VRM lenders require a large one-time lump-sum payment to bring amortization back to the original schedule. Many borrowers find that lump sum very hard to come up with on short notice.
The 2022–2023 rate cycle showed the difference in real time
When the Bank of Canada raised rates 10 times in 15 months, ARM borrowers at Scotia and the monolines felt every increase in their monthly payment — painful, but transparent. VRM borrowers at TD, RBC, BMO, CIBC, National Bank, and Manulife Bank kept the same payment for months, then discovered they were in negative amortization territory, hitting trigger rates, or facing renewal payments 30–50% higher than what they'd been paying.
Neither product is 'better.' Both have real trade-offs. But borrowers should choose one deliberately, not by accident of which bank happened to have the sharpest quoted discount that week.
Who each product fits
ARM is the cleaner product for borrowers who want to see the true cost of rate changes as they happen, and who have income flexibility to absorb payment moves. It's also the product where Scotia's semi-annual compounding produces the lowest Big Five payment at any given quoted rate — see our separate post on why the same rate produces different payments.
VRM is the more comfortable product for borrowers who value payment stability over amortization control, and who understand the trigger-rate and renewal-shock mechanics. It's the default for most Canadian lenders and works well in flat or falling-rate environments.
Not sure which is right for your file? Model both on our mortgage payment calculator to see the payment gap before you commit.
FAQ
What's the difference between an ARM and a VRM in Canada?+
An ARM (Adjustable Rate Mortgage) has a floating rate AND a floating payment — the payment changes every time prime moves, and the amortization stays on schedule. A VRM (Variable Rate Mortgage) has a floating rate but a fixed payment — the amortization stretches when rates rise and shrinks when rates fall. On the ARM side you have Scotiabank plus most broker-channel monolines (First National, MCAP, RMG, Equitable Bank, and others). On the VRM side you have TD, BMO, CIBC, RBC, National Bank, Manulife Bank, and most credit unions.
Do VRMs have trigger rates?+
Yes. Every VRM has a trigger rate — the point at which the fixed payment no longer covers the interest owed on the loan. When a mortgage hits its trigger rate, the lender will require a higher payment, a lump-sum contribution, or a conversion to fixed. ARMs don't have trigger rates because the payment adjusts with the rate.
Is Scotia the only lender in Canada that offers an ARM?+
No — Scotia is only the Big Five outlier. Most broker-channel monoline lenders also default to ARM as their main variable product: First National, MCAP, RMG, Equitable Bank, and others. By lender count, ARM is actually the more common variable structure in Canada; the VRM camp just contains the biggest household-name banks (TD, BMO, CIBC, RBC, National Bank, Manulife Bank) and most credit unions.
Can I switch from a VRM to a fixed mortgage mid-term?+
Yes — most VRMs allow a conversion to a fixed rate at any time during the term, typically at the lender's posted fixed rate rather than a discounted rate. There's usually no penalty to convert, but the fixed rate offered on conversion is rarely the sharpest rate available on the market.