Every renewal season, the fixed-vs-variable debate resurfaces, usually framed as if one option is objectively smarter. It isn't. Each one trades a different kind of certainty for a different kind of flexibility, and the right choice depends on things a rate comparison chart can't see.
What you're actually choosing between
A fixed rate locks your payment for the term. You know exactly what you'll owe every month, and nothing that happens in the broader economy changes that until renewal. A variable rate moves with the lender's prime rate, which moves with the central bank's policy rate. Your payment (or, with some products, how much of it goes to principal) can shift during the term.
Reasons people lean fixed
If a rate increase would genuinely strain your budget, or you just don't want to think about the news cycle affecting your mortgage, fixed removes that variable entirely. It also tends to be the more comfortable choice for tight budgets, first-time buyers still learning their real cost of living, or anyone who values predictability over optimizing for the lowest possible cost.
Reasons people lean variable
Historically, variable rates have often (not always) worked out cheaper over the full term, since they typically start lower than fixed rates on comparable terms. If your budget has real slack — enough to absorb a few rate increases without changing your lifestyle — the historical odds and the lower starting point can make variable the better bet mathematically, even if it's a noisier ride.
The question worth asking yourself
Not "which rate will be lower," because nobody knows that in advance. Ask: if my payment went up by a meaningful amount for a year or two, would that be an inconvenience or a real problem? Your honest answer says more about which product fits than any rate forecast will.
Run both scenarios in the Payment calculator — it's a useful way to see the actual dollar difference at today's rates before you decide.