Two Rates, Two Completely Different Engines
Walk into any bank and ask for a mortgage rate. You'll be quoted two types: fixed and variable. They sound like two flavours of the same thing. But under the hood, they are driven by totally different forces. Knowing which force controls which rate is the single most useful thing a homeowner or buyer can learn about mortgage pricing in Canada.
Fixed rates are pegged to the bond market. Specifically, the yield on Government of Canada bonds. Variable rates are pegged to the Bank of Canada's overnight policy rate, which flows through to your lender's prime rate. These are two separate systems. They can — and sometimes do — move in opposite directions at the same time.
The Bond Yield Connection (Fixed Rates)
When a lender gives you a five-year fixed mortgage, they are locking in a price for five years of money. To do that, they go to the bond market and borrow at the current five-year Government of Canada bond yield. That yield is their cost of funds. It's the floor below which they would lose money lending to you.
On top of that floor, they add a markup. It's called the spread. It covers costs, default risk, and profit. A typical spread on a five-year fixed mortgage is between 1.0% and 2.0%. The exact spread shifts with competition and market stress. When the economy feels risky, lenders widen the spread. When competition heats up, they squeeze it.
Because the five-year fixed mortgage is the most popular term in Canada. Roughly half of all Canadian mortgages are five-year fixed. So the five-year Government of Canada bond yield is the benchmark the market watches most. Hold a three-year fixed? The three-year bond yield is the benchmark. The maturity of the bond matches the term of the mortgage.
This means your fixed rate can rise even if the Bank of Canada is cutting its policy rate. Why? Bond yields are set by the open market. Global investors buy and sell Government of Canada bonds based on inflation views, demand for safe assets, and the direction of our economy. The Bank of Canada sways this market, but does not directly control it.
The Overnight Rate Connection (Variable Rates)
Variable mortgage rates follow a totally different path. The Bank of Canada sets the overnight lending rate. That's the rate at which major banks lend money to each other for one-day periods. This is the rate you hear about on the news eight times a year when the Bank makes its scheduled announcements.
When the Bank of Canada raises or lowers the overnight rate, chartered banks adjust their prime rate almost right away. Your variable mortgage is usually priced as prime minus (or plus) a fixed discount. For example, prime minus 0.80%. So if prime is 4.45% and your discount is 0.80%, your rate is 3.65%.
| Rate | Current Level | What Controls It |
|---|---|---|
| BoC Overnight Rate | 2.25% | Bank of Canada policy decisions (8×/year) |
| Bank Prime Rate | 4.45% | Follows overnight rate (banks set independently) |
| 5-Year Bond Yield | ~2.7% – 3.2% | Open market — global investors, inflation expectations |
| 5-Year Fixed Mortgage | ~3.7% – 5.0% | Bond yield + lender spread |
| Variable Mortgage | ~3.5% – 4.5% | Prime rate − lender discount |
Between June 2024 and October 2025, the Bank of Canada cut the overnight rate seven times in a row. That's a total of 275 basis points, from 5.00% down to 2.25%. It was one of the most aggressive easing cycles in recent memory. Variable-rate holders saw the benefit right in their monthly payments. The Bank has since held steady at 2.25% through three straight announcements.
The Spread: Why Your Rate Isn't Just "Bond Yield Plus a Number"
If mortgage pricing were simple, you could just add a set percentage to the bond yield and know your rate. In reality, the spread between the five-year bond yield and the five-year fixed mortgage rate moves. And it can move a lot.
In calm times with fierce lender competition, spreads can shrink to as low as 1.0%. In financial stress — think early pandemic, a banking crisis, or a sharp recession — spreads can blow out to 2.5% or more. Lenders are pricing in higher default risk and want more margin for the haze.
Bond yields could fall by 0.30% and your fixed rate might not move at all. Why? The lender widened its spread by the same amount. This is one of the most common sources of frustration. Borrowers watch bond yields drop and expect a rate cut right away. The yield is the input. But the spread is the filter between the market and your mortgage contract.
When Fixed and Variable Diverge
Fixed rates follow the bond market. Variable rates follow the Bank of Canada. So the two can move in opposite directions. Take early 2025. The Bank of Canada was still in its cutting cycle — pushing variable rates lower. But bond yields were climbing on global inflation fears and U.S. tariff worry, which pushed fixed rates higher. Borrowers choosing between the two were facing a truly split market.
This kind of split isn't unusual. It happens any time bond investors see the future differently than the central bank. Bond traders might price in rate hikes twelve months out, even as the Bank of Canada is still cutting today. That forward-looking tension is exactly why fixed rates can rise while variable rates fall, and vice versa.
So Which Rate Should You Watch?
It depends on what you hold or what you're shopping for. In a variable mortgage or weighing one? The Bank of Canada overnight rate and the next scheduled announcement date are your north star. Have a fixed-rate renewal coming up? Track the five-year Government of Canada bond yield. It's published daily by the Bank of Canada and reported by every major financial outlet.
The Key Takeaway
Fixed rates are set by the bond market — not the Bank of Canada. Variable rates are set by the Bank of Canada — not the bond market. They can move apart. Knowing which one controls your mortgage is the difference between a well-timed decision and being caught off guard at renewal.
Where Things Stand Right Now
As of March 2026, the Bank of Canada overnight rate sits at 2.25%. Prime rate is 4.45%. Both have been unchanged since October 2025. The five-year Government of Canada bond yield has been in the 2.7% to 3.2% range. Recent moves are driven by global trade tensions and Canadian inflation data. Five-year fixed mortgage rates from top lenders are in the 3.7% to 5.0% corridor. The exact rate depends on the product and insured status.
The market is watching two things. One: do inflation pressures come back? That could push the Bank toward hikes and bond yields higher. Two: does the economy soften further? That could bring one more round of cuts and pull both rates down. Nobody knows for sure. That's why knowing the mechanics matters more than trying to time the bottom. For dates, see the Bank of Canada announcement schedule. For the term decision, our breakdown of fixed-rate mortgages covers when each makes sense. Renewing in 2026? Our mortgage renewal and refinancing guide walks through your options. The broader 2026 housing market outlook sets the stage for the year ahead.
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