Fixed vs. Variable in Oakville:
How to Choose With the Bank of Canada on Hold

If I had to pick the single most-asked question in my Oakville meetings, it would not be about rates or down payments. It would be this one: fixed or variable?

It matters more here than in most of Ontario because the mortgages are bigger. A quarter-point on a $400,000 mortgage is pocket change. A quarter-point on a $1.2 million mortgage is a car payment. So the decision deserves real numbers, and it deserves an honest answer about what has to happen for each choice to win.

Where things stand in September 2026

On September 2 the Bank of Canada held its overnight rate at 2.25% for the seventh consecutive announcement. Headline inflation was about 3% in July while core measures sat near 2%, the economy grew faster than expected in the second quarter, and the Bank made clear it is waiting to see how trade and tariff developments play out before moving in either direction. The next decision, with a fresh set of forecasts, is October 28. Going into the fall, the consensus among forecasters is no change for the rest of 2026.

Two things follow from that. Variable rates, which move with prime (currently 4.45%), are unlikely to change much in the next few months. Fixed rates, which follow Government of Canada bond yields rather than the Bank directly, will keep moving with the bond market and can rise or fall regardless of what the Bank does.

The gap today, in Oakville dollars

As of early September 2026, competitive pricing looks roughly like this:

• Five-year fixed: about 4.24%
• Five-year variable: about prime minus 1.00%, so about 3.45%
• Gap: about 0.79%

These are snapshots; the rates page is updated far more often than this article. On a $1 million mortgage with a 25-year amortization:

On a $1.5 million mortgage the monthly gap grows to about $637. If prime does not move for five years, the variable saves roughly $37,600 in interest on $1 million and leaves you about $12,000 further ahead on the balance. You can run your own balance through the mortgage calculators.

What has to happen for fixed to win

The variable starts 0.79% ahead. For the fixed to come out cheaper over the full term, prime would need to rise by more than 0.79% on average across the five years. Because a hike in year four only hurts for one year, the practical bar is higher: roughly four quarter-point increases within the first year or two.

Here is the variable payment on $1 million at each step:

Rule of thumb for Oakville balances: each 0.10% change in rate moves the payment by about $55 a month per $1 million of mortgage.

What has to happen for variable to win

Less than you might think. If the Bank stays on hold through 2027, the variable wins by the full $425 a month. If the Bank cuts even once, the gap widens. If the Bank hikes twice in 2027 and then holds, the variable still finishes ahead over the term. The variable loses only if hikes are early, repeated and sustained, which is the scenario the Bank's own language is currently steering away from.

That is not a forecast. Nobody predicted 2022 either. It is simply the math of a 0.79% head start.

Two kinds of variable, and the 2022 lesson

Not all variables behave the same way, and this caught a lot of Ontario homeowners off guard in 2022.

Adjustable-rate mortgages change your payment every time prime moves. Your amortization stays on track and there are no surprises at renewal. Most non-bank lenders and some banks offer this structure.

Fixed-payment variables keep your payment the same when prime rises and quietly shift more of it to interest. If rates rise far enough you hit the trigger rate, where the payment no longer covers the interest, and the lender steps in. Some big banks default to this structure.

For a large Oakville mortgage I generally prefer the adjustable-rate version. It keeps the amortization honest and avoids a nasty surprise at renewal, at the cost of a payment that moves. If a moving payment is a problem for your budget, that is a sign the fixed rate may suit you better anyway.

Penalties: the part of the decision Oakville buyers underrate

A large share of five-year mortgages in Canada are broken or changed before maturity: a move, a divorce, a job change, a refinance for a renovation. In Oakville, where move-up buying is a way of life, the penalty formula is not a footnote. It is also the reason I tell renewing clients to read the renewal playbook before they pick a term.

• Variable: the penalty is three months' interest. On $1 million at 3.45% that is about $8,600; at 4.24% it is about $10,600.
• Fixed: the penalty is the greater of three months' interest or the interest rate differential (IRD). At most non-bank lenders the IRD is calculated on the rate you actually pay, so with three years left and rates a little lower it might land near $15,000 to $19,000 on $1 million. At the big banks it is calculated using posted rates and the discount you originally received, which in many scenarios produces a much larger number, and in a falling-rate environment it can exceed $30,000.

If there is any realistic chance you sell or refinance within the term, the variable's penalty advantage alone can be worth more than the rate difference. If you are certain you are staying put for five years, it matters less.

The stress test favours variable slightly

Both rate types are stress-tested at the higher of the contract rate plus 2% or 5.25%. Today that means a fixed borrower qualifies at about 6.24% while a variable borrower qualifies at about 5.45%. For a household earning $200,000 with no other debts, that is the difference between a maximum mortgage of roughly $850,000 and roughly $915,000 on a 25-year amortization, an increase of about 8%. For buyers right at the edge of what a freehold in West Oak Trails or River Oaks costs, that gap can decide the purchase, which is why I model both rate types in every pre-approval.

Middle paths

You do not have to pick a pure five-year fixed or a pure five-year variable.

• A three-year fixed is often priced near the five-year and gives you a reset point in 2029 with a smaller penalty exposure.
• A hybrid or split mortgage puts part of the balance on fixed and part on variable. Two penalties, two rates, but genuine diversification.
• A convertible variable lets you lock into a fixed term with the same lender at any time without penalty. Useful, with one caveat: you convert at the lender's rate that day, not the rate you wish you had.
• A variable with a fixed-sized payment by choice. Take the variable, but set your payment to what the fixed would have been. The extra $425 a month goes straight to principal, and on $1 million that is more than $25,000 of additional equity over five years while you keep the smaller penalty.

How to decide: five questions

1. If your payment rose by $500 a month next year, would it hurt or would it annoy you? If it would hurt, take the fixed.
2. Is there a realistic chance you sell, move up or refinance within five years? If yes, the variable's penalty is a real advantage.
3. Are you buying at the top of your approval? If so, the variable's lower qualifying rate may be doing the work, and a fixed-sized payment on a variable is a disciplined way to handle it.
4. Do you have a cash cushion? Six months of payments in reserve makes a variable comfortable. No cushion makes a fixed sensible.
5. Will you actually watch the market? A variable rewards people who pay attention and will convert or switch when it makes sense. A fixed rewards people who want to sign once and forget it.

There is no wrong answer here, only an answer that fits your file or one that does not. If you want to see these numbers on your actual mortgage rather than a round million, that is a twenty-minute conversation.