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This is one of the most common questions I get, and the honest answer is that neither is universally better. The right choice depends on how you feel about risk, how long you plan to stay in the home, what your household looks like in three years, and how the penalty math plays out if life changes mid-term. The rate-trajectory call is the smallest input. Here's how I actually frame it.

What you're actually choosing between

Fixed: certainty in dollars per month

Your rate is locked for the entire term, usually one, three, or five years (some lenders also offer seven- and ten-year terms but they're rare). The payment doesn't move regardless of what the Bank of Canada does. Rates fall? You don't benefit. Rates rise? You're insulated. The product trades flexibility for predictability, and for many GTA households on a single income or with kids in private school, that predictability is genuinely valuable.

Variable: rides the prime rate

Your rate is expressed as "prime minus X percent," where X is negotiated when you sign and stays fixed for the term. The prime rate itself moves with Bank of Canada policy decisions, typically eight times per year. There are two distinct variable products in the Canadian market and the difference matters more than people realize:

  • Adjustable-rate mortgage (ARM). The payment recalculates every time prime moves. Prime up by 0.25 percent, payment up by roughly 0.25 percent worth. Honest, transparent, lets you actually feel the rate move in your bank account each month.
  • Variable-rate mortgage (VRM). The payment stays the same, but the principal-to-interest split shifts behind the scenes. Prime up, more of each payment goes to interest, less to principal. The number on your bank statement is identical month to month, which is comforting but masks what's actually happening to the loan.
VRM is the default in Canada, and it has a hidden ceiling

If a Canadian lender says "variable," they almost always mean VRM, not ARM. The trap with VRM in a rising-rate environment: there's a "trigger rate" at which your fixed payment no longer covers the interest portion. When you cross it, the lender either calls the loan, increases your payment without notice, or extends your amortization. None of those are pleasant surprises. I always calculate your trigger rate before you sign and put it in writing on your file, so the ceiling isn't a mystery.

The structure-by-situation table

The simplest way I can lay this out. Find the row that fits, and the recommended starting point is the right column.

Your situation Default starting point
Salaried income, single home, 5+ year plan, the idea of payment swings stresses you out 5-year fixed
Variable or commission income, comfortable buffer, want flexibility to break early without IRD pain Variable (often a VRM)
Selling within two to three years (relocation, downsizing, life change in motion) Variable, or short-term fixed (1 to 3 years)
Tight budget, single income, first home, need predictability above all 5-year fixed
Late-cycle rate environment (rates peaked, expected to fall) Variable to ride them down
Early-cycle rate environment (rates near historical lows, expected to rise) 5-year fixed to lock in

Two things this table can't capture: how you'd actually feel watching the Bank of Canada rate decision in eight months, and what's happening in your household three years from now. Those go in the conversation.

The real divergence: what happens if life changes mid-term

On paper, the rate gap between fixed and variable is what people obsess over. In practice, the bigger financial divergence shows up only if you need to break the mortgage before the term ends. A new job in another city, a relationship change, a parent moving in, a house that suddenly stopped fitting. In the GTA, where life moves people around frequently, this is the most under-discussed input to the structure choice.

The penalty math, on a typical Etobicoke detached

Let's say Aisha and Marc have a $720,000 mortgage on their Etobicoke detached, four years into a five-year term. If life changes (a job in Calgary, an aging parent moving in, a third child) and they need to break the mortgage:

On a variable mortgage, the penalty is typically three months' interest, roughly $6,500. On a fixed mortgage, if rates have dropped since they signed, the IRD penalty could be $20,000 to $35,000. That gap is often the deciding factor for clients who aren't 100 percent sure they'll stay put through the whole term, and in the GTA, "100 percent sure" is a rare thing.

The questions I actually ask clients

Forecasts are noisy. Lifestyle isn't. Before I recommend fixed or variable, I ask the same five questions of every client, and the answers usually tell you the right structure faster than any rate-trajectory call.

  • How long do you plan to stay in this home? Two years, five, twenty? The shorter the horizon, the more variable's lower break penalty matters.
  • Is your income stable, variable, or commission-heavy? A commissioned realtor and a salaried civil servant should not pick the same product, even if the rate sheet says they should.
  • What does your household look like in three years? A baby on the way, a parent moving in, a partner switching careers. These change your buffer and your tolerance for payment volatility.
  • If your payment went up $400 a month tomorrow, what would you cut? If the answer is "I'd manage," variable is on the table. If the answer is "I'd be in trouble," fixed is the right call regardless of what the market does.
  • Do you actually want to think about this every quarter, or once every five years? Some clients enjoy the hands-on call. Most don't. There's no wrong answer.

And no matter which structure you choose, make sure the mortgage itself is flexible. Prepayment privileges, portability if you move, and a reasonable penalty structure matter more than a 0.1% rate difference.

What clients ask before they decide

If I pick variable now, can I switch to fixed later?
Yes. Most lenders let you convert from variable to fixed at any time, at the lender's current fixed rate. There's typically no penalty for the conversion. The catch is that the fixed rate you'd be locking into is whatever's on offer that day, not the rate that existed when you originally signed. The "escape hatch" is real but it's not free.
If we go fixed, three years or five?
Depends on the shape of the current rate curve and what's happening in your household over those years. When the curve is flat (3-year and 5-year rates close together), the 5-year usually wins because you get more certainty for almost the same money. When 5-year is meaningfully higher than 3-year, the 3-year can be worth the renewal risk if you believe rates are likely to be lower in three years. We pull the actual current spread when we sit down to decide, rather than guessing.
My partner wants fixed, I want variable. Now what?
Common conversation. The structure question is partly mathematical and partly emotional, and one partner's anxiety about payment swings is itself a valid input. Two paths to consider: (1) go fixed if either of you genuinely won't sleep on variable, since the savings aren't worth the household stress; (2) split the mortgage into a portion of each (a hybrid product), which works for some lenders but adds complexity. I'd usually steer toward option 1 unless the dollar gap is large.
How do I know what my trigger rate is on a VRM?
Your trigger rate is the point where your fixed monthly payment no longer covers the interest. It depends on your rate, amortization, and payment amount. If you're in a VRM (the most common Canadian variable structure), I'll calculate yours so you know exactly where the ceiling is and what would happen if it gets crossed.

Still on the fence? Skip the spreadsheet, do a 10-minute call.

Tell me your income shape, your timeline, and how you'd feel watching the next Bank of Canada decision. I'll come back with a recommendation, the trigger rate if we go variable, and the IRD scenario if we go fixed. Numbers and your actual life, both in the same conversation.

Pick by household, not by forecast.

The conversation starts with your life, not the rate sheet.