Key Takeaway

A fixed-rate mortgage locks your interest rate for the entire term (typically one to five years), giving you predictable payments regardless of Bank of Canada policy changes. A variable-rate mortgage fluctuates with your lender’s prime rate, which moves with the Bank of Canada policy rate, meaning your payment can rise or fall during the term. Fixed-rate mortgages suit borrowers who value payment certainty and cannot absorb sudden increases, while variable-rate mortgages may save money when rates fall but expose you to payment risk when rates climb.

How Fixed-Rate Mortgages Work

With a fixed-rate mortgage, your interest rate stays constant for the full mortgage term. In Canada, the mortgage term is the period during which your rate, prepayment privileges, and penalties are set, usually one to five years. At the end of the term you renew or renegotiate, even though your amortization (the total payoff period) typically runs 25 or 30 years.

Your monthly payment does not change during the term, making budgeting straightforward. According to the Financial Consumer Agency of Canada, fixed-rate mortgages appeal to first-time buyers and households on tight budgets because the payment remains predictable.

The trade-off is that fixed rates usually carry a premium over variable rates at the time you sign, and if market rates drop during your term, you remain locked into the higher rate unless you break the mortgage and pay a penalty (often calculated as the interest rate differential, or IRD, which can be substantial).

How Variable-Rate Mortgages Work

A variable-rate mortgage ties your interest rate to your lender’s prime rate, which moves in step with the Bank of Canada policy rate. When the Bank of Canada raises or lowers its policy rate, your lender typically adjusts prime within days, and your mortgage rate changes accordingly.

Canadian variable-rate mortgages come in two forms: adjustable-rate (your payment amount changes when the rate changes) and fixed-payment (the payment stays the same, but the portion going to principal versus interest shifts). With a fixed-payment variable-rate mortgage, rising rates mean less principal is paid down each month, potentially extending your amortization.

Variable rates often start lower than fixed rates, and borrowers who can tolerate payment fluctuations may save money over the term if rates remain stable or fall. However, sharp rate increases can push monthly costs beyond your comfort zone.

Read also: Fixed versus Variable Rate Mortgage in Canada: Which Is Right for You

Which Option Fits Your Situation

Choose a fixed-rate mortgage if you need payment certainty, cannot absorb unexpected cost increases, or believe interest rates will rise during your term. Fixed rates offer peace of mind and simplify long-term budgeting, making them the default choice for risk-averse borrowers and those stretching to afford the property.

Choose a variable-rate mortgage if you have financial flexibility to handle payment increases, expect rates to decline or remain stable, or are willing to accept short-term volatility in exchange for potential savings. Borrowers with cash reserves, strong income growth prospects, or shorter time horizons (planning to sell or refinance within a few years) often favour variable rates.

As covered in foundational texts such as Principles of Finance, interest rate risk is a central concept in mortgage choice: fixed-rate borrowers transfer that risk to the lender, while variable-rate borrowers retain it in exchange for a lower starting cost.

Next Step

Before choosing, review current fixed and variable rates from multiple lenders (rates as of October 2026 change frequently), calculate the payment difference under each option, and stress-test whether you can afford the variable-rate payment if the Bank of Canada raises rates by one or two percentage points. Speak with a licensed mortgage broker or your financial institution to confirm which rate type and term align with your risk tolerance, budget, and plans.

Disclaimer: This article provides general educational information only and is not personalized financial, lending, legal, or tax advice, nor an offer or commitment to lend. Mortgage products, rates, prepayment privileges, and penalties vary by province, territory, and lender. The OSFI mortgage stress test, mortgage default insurance requirements, and available programs differ depending on where you live and which lender you use. Rates as of October 2026 change frequently. Confirm current terms and your personal eligibility with a licensed mortgage professional before making a decision. For individual guidance, consult a licensed mortgage broker, the Financial Consumer Agency of Canada, or a qualified financial advisor.