How Mortgage Rates Work in Canada

Understanding how mortgage rates work in Canada starts with one idea: there is no single rate setter. Fixed mortgage rates are priced mainly off Government of Canada bond yields, especially the five-year benchmark. Variable mortgage rates are priced off the prime rate, which follows the Bank of Canada policy interest rate. Your lender then adds a business spread, and the number you negotiate is usually below the posted rate.

Those two channels react to different signals at different speeds. A central bank announcement can move a variable rate within days, while a fixed rate often drifts for weeks as bond markets price in expectations before any decision is made. Knowing which channel you are exposed to tells you what to watch.

Two pricing channels: fixed and variable

Almost every mortgage in Canada is priced through one of two mechanisms. Fixed rates behave like a long-term loan: the lender funds them partly through bond markets, so the yield on Government of Canada bonds sets the floor. Variable rates behave more like short-term credit: they float with the prime rate your lender publishes.

You can see how the two behave side by side with the fixed vs variable calculator, which models payments under each structure rather than guessing which one wins. For a fuller breakdown of the trade-offs, see fixed vs variable mortgage rates in Canada.

Why fixed rates follow bond yields

When you take a five-year fixed mortgage, your lender is effectively committing to a long-term interest rate. To fund that commitment it relies on wholesale funding, including bonds. The five-year Government of Canada benchmark bond yield is the reference point most lenders watch, because it reflects the market's view of inflation, growth, and future interest rates over a similar horizon.

This is why fixed rates can fall before the Bank of Canada cuts its policy rate, and rise even when the central bank holds steady. Bond traders move first; lenders reprice second. If you are shopping for a fixed rate, the yield curve is a better early warning signal than the announcement calendar.

Why variable rates follow prime

A variable mortgage is quoted as a spread against prime, such as prime minus a discount or prime plus a margin. Prime is the rate banks use as a base for their best business borrowers, and it typically rises and falls when the Bank of Canada changes its policy rate. When the policy rate moves, prime usually moves by the same amount shortly after. The prime rate explained guide walks through how that transmission works.

If your rate is variable, your lender will usually adjust either your payment or your amortization when prime changes. Some products keep the payment steady and let the amortization stretch, which can quietly slow your progress. Read your contract so you know which model you have.

Posted rate versus discounted rate

Every major lender publishes a posted rate, sometimes called the posted chartered bank rate. It is a reference number, not the price most borrowers pay. Lenders routinely offer a discounted rate below posted, and the size of that discount varies with your credit profile, down payment, property, and the term you choose.

That gap matters because penalties are sometimes calculated against the posted rate rather than your discounted rate. Two mortgages with the same payment can carry very different exit costs. This is one reason a straight rate comparison is incomplete.

APR, compounding, and the real cost

The annual percentage rate (APR) folds in the interest rate plus certain fees, so it is a better comparison tool than the headline rate alone. Canadian mortgages also compound semi-annually by convention, which means the effective annual cost is slightly higher than the nominal rate suggests.

Two lenders advertising the same nominal rate can differ once fees, compounding, and payment frequency are included. Ask each lender for the APR and the full cost of borrowing, then compare like with like. The mortgage payment calculator helps you turn a quoted rate into an actual payment so the comparison becomes concrete.

What this means when you shop

• Decide first whether you want the certainty of fixed or the flexibility of variable, then compare rates inside that category.
• Ask for the discounted rate and the APR, not just the posted rate.
• Check how penalties are calculated and whether the lender uses the posted or contract rate.
• Confirm the current policy rate and prime on the Bank of Canada website rather than relying on an old quote.
• Remember that the rate is only one term of the contract; prepayment privileges and portability matter too.

The Bank of Canada's own reference pages are the fastest way to confirm where the policy rate and prime sit today, and the forces behind them are covered in what affects mortgage rates in Canada. For the policy rate specifically, the Bank of Canada policy rate guide explains the chain from announcement to your payment.

Common mistakes

The most frequent error is assuming the Bank of Canada sets mortgage rates directly. It does not. It sets a short-term policy rate that feeds into prime and influences, but does not dictate, fixed pricing. The second error is comparing a variable rate against a fixed rate as if they were interchangeable; they carry different risk and different exit costs.

A third mistake is ignoring the term. A lower rate on a one-year term can cost more than a slightly higher rate on a five-year term once renewal risk and fees are counted. Map the rate to the term and to your plans, then confirm the numbers with your lender or a mortgage professional.