How Are Mortgage Interest Rates Determined in Canada?

Two buyers can walk into the same bank on the same day and be quoted different mortgage rates. Why? Because your rate is shaped by forces that range from the global bond market down to your own credit score. This guide explains how mortgage interest rates are determined in Canada — so you understand what you can influence and what you can't.

Key takeaways

• Variable mortgage rates move with the Bank of Canada's policy rate, which drives lenders' prime rate.
• Fixed mortgage rates track Government of Canada bond yields, not the Bank of Canada directly.
• Your lender adds a margin for profit, risk, and competition on top of its funding cost.
• Your own profile — credit score, down payment, and whether the mortgage is insured — affects the rate you're offered.
• HOMEH gives eligible buyers the industry's highest Cashback Rebate, lowering your true cost no matter the rate. Sellers list for 1%, or free when they also buy with HOMEH within 6 months, or $395 + HST with a Mere Posting.

Two rates, two different drivers

The single most important thing to understand is that fixed and variable rates are set by different forces. Variable rates follow the Bank of Canada. Fixed rates follow the bond market. Mixing these up leads to a lot of confusion when people try to predict where rates are headed.

If you haven't yet decided between the two, read our comparison of fixed vs variable mortgage rates — and for the bigger picture, see how mortgages work in Canada.

What drives variable rates: the Bank of Canada

Variable mortgage rates are tied to your lender's prime rate, which in turn moves with the Bank of Canada's policy interest rate. When the central bank raises or cuts its rate to manage inflation and the economy, prime usually follows within days — and so does your variable payment or the portion of it going to interest.

Your variable rate is typically quoted as "prime minus a discount" (for example, prime minus a set percentage). The discount is locked for your term, but the prime rate itself floats with the Bank of Canada.

The chain in plain English

Bank of Canada policy rate → lenders' prime rate → your variable mortgage rate. Change one link and the rest tend to follow.

What drives fixed rates: bond yields

Fixed mortgage rates are not set by the Bank of Canada directly. Instead, they track the yield on Government of Canada bonds of a similar term. Lenders raise money in the bond market to fund fixed mortgages, so when bond yields rise, fixed mortgage rates tend to rise — and when yields fall, fixed rates usually ease.

Bond yields move on inflation expectations, economic data, and global investor sentiment. That's why fixed rates can shift even in a month when the Bank of Canada doesn't change its policy rate at all.

The lender's margin and your own profile

On top of its funding cost, every lender adds a margin to cover operating costs, profit, and the risk that some loans won't be repaid. Competition between lenders pushes margins down, which is why shopping around — or using a mortgage broker — can pay off.

Then the rate is fine-tuned to you. Several personal factors influence the number you're quoted:

• Credit score — a stronger score signals lower risk and can earn a better rate.
• Down payment size — counterintuitively, smaller down payments often come with insured mortgages, which can carry lower rates because the lender's risk is covered.
• Insured vs uninsured — whether your mortgage carries default insurance affects pricing.
• Income stability — steady, easily verified income strengthens your application, which matters more if you're self-employed.
• Term and type — the length of your term and whether it's open or closed both affect the rate.

Putting it all together

Your final rate is the sum of these layers: a base funding cost (driven by the Bank of Canada for variable, or bond yields for fixed), plus the lender's margin, adjusted up or down for your personal profile.

Whatever rate you land, remember that the stress test means you must still qualify at a higher rate than your contract — see how the mortgage stress test works. And before you compare offers, model the payments with the free HOMEH mortgage calculator.

A lower true cost, whatever your rate

Even the best rate can't match cash in hand. HOMEH gives eligible buyers the industry's highest Cashback Rebate — money that directly lowers what your home really costs you. Sellers list for 1%, or free when they also buy with HOMEH within 6 months, or $395 + HST with a Mere Posting. See yours with the HOMEH cashback calculator.