Fixed vs Variable Mortgage: What BC Borrowers Need to Know

“Should I go with a fixed rate or a variable rate?” It is one of the most common questions Ajay hears from borrowers across BC, whether they are buying their first home in Abbotsford or renewing a mortgage in Langley. The answer is never one-size-fits-all. It depends on your financial situation, your tolerance for risk, how long you plan to stay in the property, and what is happening in the broader economic environment.

In this guide, we will break down exactly how each rate type works, explore the historical context, and highlight a critical factor that most borrowers overlook: penalty asymmetry. By the end, you will have a clear framework for making this decision with confidence.

What Is a Fixed Rate Mortgage?

A fixed rate mortgage locks in your interest rate for the entire duration of your mortgage term, which is most commonly five years in Canada. Regardless of what happens in the economy or with the Bank of Canada's policy rate, your mortgage payment stays exactly the same from the first month to the last month of your term.

Fixed rates are primarily determined by the Government of Canada bond market. When bond yields rise, fixed mortgage rates tend to follow. When bond yields fall, fixed rates typically come down as well, though there can be a lag of days or even weeks.

For many BC borrowers, especially those on a tight monthly budget or those who simply value predictability, a fixed rate provides peace of mind. You know exactly what your housing cost will be, which makes financial planning straightforward.

What Is a Variable Rate Mortgage?

A variable rate mortgage is tied to the lender's prime rate, which moves in tandem with the Bank of Canada's overnight lending rate. Your mortgage rate is typically expressed as “prime minus” a discount, for example prime − 0.90%. As the Bank of Canada raises or lowers its rate, your mortgage rate adjusts accordingly.

There are two sub-types worth understanding. An adjustable-rate mortgage changes your actual payment amount when rates move, so you always know exactly how much is going to principal vs. interest. A fixed-payment variable mortgage keeps your payment the same but changes the proportion allocated to principal and interest. The latter introduces “trigger rate” risk—if rates rise enough, your fixed payment may no longer cover the interest portion, and your amortization extends.

Variable rates appeal to borrowers who are comfortable with some uncertainty in exchange for historically lower overall borrowing costs.

Historical Context: Which Has Been Cheaper?

Numerous studies have shown that, historically, borrowers who chose variable rate mortgages paid less interest over the life of their mortgage compared to those who chose fixed rates. A widely cited study by Dr. Moshe Milevsky at York University found that variable rate holders came out ahead roughly 90% of the time over rolling 15-year periods.

However, historical performance does not guarantee future results. The period from 2022 to 2024 was a stark reminder of this: the Bank of Canada raised rates aggressively from 0.25% to 5.00%, catching many variable rate holders off guard. Context matters, and the right choice depends on where we are in the rate cycle at the time you are making your decision.

Who Should Consider a Fixed Rate?

• You value certainty. If the thought of your payment changing keeps you up at night, fixed is likely the better fit.
• You are on a tight budget. First-time buyers in expensive markets like the Fraser Valley often have very little room in their monthly cash flow. A fixed rate removes the risk of a payment increase.
• You believe rates will rise. If you are locking in at what you believe is a low point in the cycle, a fixed rate lets you benefit from that timing for the full term.
• You plan to stay the full term. If you are confident you will not need to sell or refinance in the next five years, the penalty risk is less relevant.

Who Should Consider a Variable Rate?

• You have financial flexibility. If your budget can absorb a payment increase of a few hundred dollars per month, you can ride out rate fluctuations.
• You believe rates will decline. If the Bank of Canada is expected to cut rates over the coming years, a variable rate lets you benefit immediately with each reduction.
• You may sell or refinance before the term ends. This is where penalty asymmetry becomes critically important (see below).
• You are comfortable with market risk. Some borrowers are simply more at ease with fluctuation and focus on the long-term cost savings.

Penalty Asymmetry: The Factor Most Borrowers Overlook

This is one of the most important considerations in the fixed vs. variable debate, and it rarely gets the attention it deserves.

If you break a variable rate mortgage early, the penalty is typically three months of interest. On a $500,000 mortgage at 5%, that is roughly $6,250. It is straightforward, predictable, and relatively manageable.

If you break a fixed rate mortgage early, the penalty is the greater of three months interest or the Interest Rate Differential (IRD). The IRD formula compares your contract rate to the lender's current rate for the remaining term, and the resulting penalty can be staggeringly high—often $15,000 to $30,000 or more on a typical BC mortgage.

Life is unpredictable. Job transfers, relationship changes, growing families, and unexpected opportunities frequently lead borrowers to sell or refinance before their five-year term expires. Statistics suggest that the average Canadian mortgage is broken or refinanced within approximately 3.5 years.

If there is any meaningful chance you will need to break your mortgage early, the penalty difference between fixed and variable should weigh heavily in your decision.

The Current Environment

As of early 2025, the Bank of Canada has begun reducing its policy rate after the aggressive tightening cycle of 2022-2023. Fixed rates have also come down from their peaks. The gap between fixed and variable rates has narrowed compared to previous years. In this environment, many borrowers are finding value in shorter fixed terms (such as 2- or 3-year fixed) as a middle ground—locking in certainty for a shorter period while positioning themselves to renew into potentially lower rates. Ajay can help you evaluate whether a short-term fixed, a 5-year fixed, or a variable rate makes the most sense for your specific situation.

Summary

Ultimately, the right choice is the one that aligns with your financial reality and risk tolerance—not the one that sounds best in a headline. A mortgage broker can model both scenarios using your actual numbers and help you make a decision you will feel confident about.