How a variable mortgage works, what moves your rate, and when it beats a fixed rate — a clear guide for Canadian borrowers. Get matched with a mortgage lender in minutes.
A variable mortgage has an interest rate that moves up and down with your lender's prime rate. It often starts lower than a fixed rate and can save you money if rates fall — but your cost can also rise. This guide explains how variable mortgages work, the two payment styles, and when a variable rate is the smarter choice.
A variable mortgage ties your interest rate to your lender's prime rate, expressed as "prime minus" or "prime plus" a set amount. When the Bank of Canada changes its policy rate, lenders typically move their prime rate too — and your mortgage rate follows. So unlike a fixed mortgage, your rate isn't locked: it can change during your term.
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Because you, not the lender, carry the risk of rate changes, the variable rate is often lower than the fixed rate offered at the same time. That discount is the reward for taking on uncertainty — and over many past periods, variable-rate borrowers have come out ahead, though there's never a guarantee.
Your variable rate is set as a discount or premium to prime — for example, "prime minus 0.50%." When prime moves, your rate moves by the same amount, and the share of each payment going to interest versus principal shifts. The Bank of Canada sets the policy rate that drives prime, announcing decisions on a fixed schedule through the year.
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Even with a variable rate, you still qualify under the stress test, so lenders confirm you could handle higher payments. It's wise to budget as if your rate could rise — building in a cushion means a rate increase is manageable rather than a shock.
Variable mortgages come in two payment styles, and the difference matters when rates move:
Your payment stays the same even as the rate changes; what shifts is how much of each payment goes to interest versus principal. If rates rise sharply, more goes to interest and you pay down principal more slowly — and you can hit a "trigger rate" where the payment no longer covers the interest, requiring an adjustment.
Your payment changes whenever the rate changes, so you always cover interest and stay on your amortization schedule. Payments are less predictable, but you avoid trigger-rate surprises and keep paying down principal as planned.
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The choice between a variable mortgage and a fixed mortgage comes down to certainty versus potential savings. A fixed rate locks your payment and protects you from increases; a variable rate can start lower and fall further, but it can also climb. If your budget has room to absorb higher payments and you believe rates will hold or drop, variable can pay off. If stability matters more, fixed is the safer path.
You don't have to guess forever: most variable mortgages let you convert to a fixed rate during the term, and the smaller break penalty gives you more flexibility if your plans change.
A variable mortgage tends to suit borrowers with a financial cushion, those comfortable with some risk, and anyone who may move or refinance mid-term and wants the smaller break penalty. Because lenders set their discount to prime differently, comparing offers is the best way to land a strong variable rate.
Instead of applying to lenders one at a time, Loanspot matches you with variable mortgage options from licensed Canadian lenders so you can compare in one place. Tell us what you need and see what's available.
The questions Canadian borrowers ask most.
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A variable mortgage has a rate that moves with your lender's prime rate, set as prime plus or minus a fixed amount. It often starts lower than fixed but can rise or fall during your term.
Your rate follows the lender's prime rate, which generally moves when the Bank of Canada changes its policy rate. When prime rises or falls, your mortgage rate moves by the same amount.
A VRM keeps your payment fixed while the interest/principal split changes; an ARM changes your payment whenever the rate changes. VRMs can hit a trigger rate, while ARMs stay on the amortization schedule.
It often starts cheaper and has historically cost less over many periods, but there's no guarantee — if rates rise, a variable mortgage can end up costing more. It depends on what rates do during your term.
Yes. Most lenders let you convert a variable mortgage to a fixed rate during the term, which is useful if you become uncomfortable with rate changes.
On a fixed-payment variable mortgage, the trigger rate is the point where your set payment no longer covers the interest. Reaching it usually means your lender will adjust your payment or amortization.
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