Fixed-rate mortgages in Canada: certainty with trade-offs
About two-thirds of Canadian mortgage holders choose fixed rates, according to CMHC data — and for good reason. Payment certainty makes household budgeting straightforward.
You know exactly what leaves your account each month until renewal, and you are insulated from rate-hike cycles during the term.
The trade-off is flexibility.
If you sell, refinance, or need to break the mortgage before maturity, the penalty on a fixed-rate mortgage can be substantially higher than on a variable — especially when the lender calculates the penalty using the interest rate differential (IRD) formula.
The right fixed-rate mortgage is not just the lowest rate.
It is the right term, the right penalty policy, and the right prepayment structure for your actual plans.
How fixed mortgage rates are set
Fixed mortgage rates are not set by the Bank of Canada. They are priced off Government of Canada bond yields — primarily the 5-year bond for 5-year fixed mortgages, and shorter-duration bonds for 1- to 4-year terms.
When bond markets expect inflation or stronger economic growth, yields rise and fixed rates follow, sometimes before the Bank of Canada acts on its policy rate.
This means fixed rates and variable rates can move in opposite directions. In early 2024, some lenders cut fixed rates while the Bank of Canada held its overnight rate steady, because bond markets were pricing in future rate cuts.
Understanding this distinction helps you assess whether today's fixed rate is likely to rise or fall in the near term.
The spread between the 5-year bond yield and the actual 5-year fixed mortgage rate reflects lender margins, competition, and risk premiums. When competition among lenders tightens, the spread narrows — sometimes to as little as 100–120 basis points above the bond yield. When lender caution rises, the spread widens.
When a fixed rate makes sense
Fixed-rate mortgages are the most popular choice in Canada, and they are particularly well-suited to specific borrower profiles. Here is when locking in tends to be the stronger move:
- Your monthly budget has limited margin — even a $150 payment increase would cause stress, and you value the peace of mind of a known number each month.
- You expect to hold the mortgage for most or all of the term. The penalty risk from breaking early is lower when the probability of breaking is low.
- Market rates are historically attractive and the premium for fixed over variable is narrow — under roughly 0.30 percentage points, the insurance value of certainty is cheap.
- You are a first-time buyer managing many new variables and want one less factor to track. Simplifying your monthly budget during year one of homeownership is a valid reason to choose fixed.
- You are on a single income or variable income and cannot easily absorb payment increases mid-term.
- You value simplicity — set the payment, automate it, and focus on other financial goals without monitoring rate announcements.
When fixed might not be the best fit
A fixed rate is not the best answer for every borrower. Consider alternatives if any of these match your situation:
- You are likely to sell, move, or refinance within 2–3 years. The IRD penalty on a 5-year fixed can be substantial if you break early — sometimes exceeding $20,000 on a typical mortgage.
- You are in a rate-cutting cycle where the Bank of Canada is actively lowering rates, and you want your mortgage payment to benefit from those declines automatically.
- You have strong cash flow and a diversified financial position, and you are willing to accept some payment variability in exchange for lower expected total interest cost over time.
- You may want to make large annual prepayments beyond the standard 15–20% allowance — variable mortgages sometimes offer more flexible prepayment terms, though this varies by lender.
Understanding the IRD penalty on fixed mortgages
The interest rate differential (IRD) penalty is the single most important clause in a fixed-rate mortgage contract — and the one most borrowers understand least until they need to break.
When you break a fixed mortgage before maturity, the lender calculates the greater of three months' interest or the IRD.
The IRD compares your contract rate to the current market rate for a term matching your remaining months.
If your rate is higher than today's rate — common when rates have fallen — you pay the difference times your outstanding balance times the remaining term. This can reach tens of thousands of dollars.
Critically, lenders use different IRD formulas. Some calculate against posted rates (which are higher and inflate the penalty), while others use discounted or contract rates.
The difference can double or halve your penalty for the same mortgage. Always ask which formula the lender uses before signing — not when you need to break.
Choosing the right fixed term
Fixed-rate mortgages in Canada are available in terms from 6 months to 10 years, though 1-, 3-, and 5-year terms are the most common. The term you choose should align with your expected hold period — how long you realistically expect to keep this mortgage before selling, refinancing, or renewing.
A 5-year fixed term is the Canadian default for good reason: it provides the longest payment certainty at typically the lowest rate among fixed terms. But if you are likely to move or refinance within 2–3 years, a shorter term — or even a variable mortgage — may cost less overall once you account for penalty risk.
A 3-year fixed term is a common middle ground. It gives you payment certainty for a shorter window, after which you can reprice.
The rate is often slightly higher than a 5-year fixed, but the shorter commitment reduces early-break risk and lets you reassess sooner if rates have fallen.
Shorter terms of 1–2 years offer maximum flexibility but typically come with higher rates and more frequent renewal risk. They can work as a bridge — for example, if you expect your credit score or income to improve within a year and want to refinance at better terms later.
Prepayment privileges on fixed mortgages
Most Canadian fixed-rate mortgages allow you to make extra payments beyond your regular schedule, which reduces your principal and shortens your amortization without penalty. This is one of the most underused features of a mortgage — and one of the most powerful.
Standard prepayment privileges include annual lump-sum payments of 15–20% of the original mortgage balance, and the option to increase your regular payment by 15–20% once per year. Some lenders also allow you to double your payment or match your payment frequency to accelerate payoff.
Using prepayment privileges consistently — even modest amounts — can cut years off your amortization and save tens of thousands in interest over the life of the mortgage. The key is to confirm the specific terms with your lender: some privileges reset annually, others are cumulative, and some restrict the timing of lump-sum payments.
Fixed mortgage features beyond the rate
The lowest advertised fixed rate is not always the best mortgage. Before locking in, compare these contract features — they can matter more than a small rate spread:
- Portability: can you transfer the mortgage to a new property if you move, preserving your rate and avoiding penalties? Not all fixed mortgages are portable, and portability windows vary.
- Blend-and-extend: can you blend your current rate with a new lower rate and extend the term, avoiding a full break penalty? This is valuable when rates have dropped significantly mid-term.
- Assumability: can a qualified buyer take over your mortgage when you sell? An assumable fixed mortgage at a below-market rate can be a selling feature.
- Penalty calculation method: posted-rate IRD or contract-rate IRD? This single clause can make a $15,000 difference in your penalty on a typical mortgage.
