Independent writing on tax-smart planning, mortgage strategy, and retirement building. For Canadian professionals who want the whole picture, not just a piece of it.
The Bank of Canada Hasn't Moved, So What Is Pushing Mortgage Rates Higher?
A homeowner can watch the Bank of Canada leave its rate untouched on announcement day and still get a renewal letter a week later quoting a higher five-year fixed rate. Nothing went wrong. The two numbers come from different places, and most people were never told which place sets their mortgage.
Your mortgage rate depends on whether it's tied to the Bank of Canada's overnight rate or to the bond market. Variable rates and lines of credit follow the first. Five-year fixed rates follow the second. Once you can tell those signals apart, renewals stop feeling random, and you can make term and borrowing decisions based on how your money actually flows.
Fixed rates are priced off a bond, not a bank announcement
Most people assume the Bank of Canada sets every rate in the country. It sets one: the overnight rate banks charge each other. Prime follows that, and variable mortgages and home equity lines of credit follow prime.
A five-year fixed mortgage is priced off the yield on five-year Government of Canada bonds. A lender funding a five-year loan looks at what five years of safe money costs, then adds a spread to cover risk, operating costs and profit. That spread has commonly sat somewhere around one to two percentage points above the bond yield.
Bond yields reflect what investors expect over the next five years. If they think inflation will stay stubborn, or that rate cuts will come slower than hoped, yields rise. Lenders then reprice fixed rates, usually a few days to a couple of weeks later.
Much of the push comes from outside Canada
Canadian bond yields are closely tied to U.S. Treasury yields. When the American economy runs hotter than expected, U.S. yields climb and Canadian yields tend to follow, even when Canada's own economy is cooling. Back in late 2024, Canadian inflation had come down to the Bank's 2% target and the Bank was cutting, yet five-year yields kept swinging, partly because of what was happening south of the border.
The spread can also widen on its own. A lender that sees more economic risk, or that has already written as many mortgages as it wants this quarter, can raise its fixed rates while bond yields barely move. A quoted rate partly reflects how eager that lender is for new business.
The practical lesson: if you hold or want a fixed rate, the five-year Government of Canada bond yield is the number to watch. Bank of Canada announcement days tell you about your line of credit.
Small moves show up in cash flow and qualification
Here is an illustrative example. On a $400,000 mortgage over a 25-year amortization, a fixed rate of 4.5% works out to roughly $2,214 a month. At 5.0%, it's about $2,326. That half point costs around $112 a month, or more than $6,700 over a five-year term, before counting the slower paydown of principal.
Qualification moves too. Under OSFI's rules you must qualify at your contract rate plus 2 percentage points or 5.25%, whichever is higher. A borrower whose contract rate rises from 4.5% to 5.0% now has to show they can carry payments at 7.0% instead of 6.5%, and that can shrink the amount a move-up buyer can borrow.
Structure your borrowing around both signals
Since fixed and variable rates can move in opposite directions, the more useful question is which piece of your debt should be tied to which signal. Trying to guess the bottom rarely works. Fixed rates often stop falling before the Bank of Canada finishes cutting, because bond investors price in those cuts ahead of time.
For anyone using a readvanceable mortgage, where the mortgage and revolving credit together can reach 80% of the home's value, the split matters a great deal. The amortizing portion may be locked to bond-driven fixed pricing while the credit line floats with prime. In a Smith Manoeuvre™, the borrowing used to invest usually sits on that prime-linked line, so a steady or falling overnight rate can keep the cost of the deductible borrowing in check even while fixed rates rise. Shorter fixed terms, or putting more equity down to reduce the loan, are other ways to limit how much any single market can affect you.
Before your next renewal, find out which number each part of your debt follows. Then decide how much of your monthly cash flow you're willing to let the bond market set.
A homeowner can watch the Bank of Canada leave its rate untouched on announcement day and still get a renewal letter a week later quoting a higher five-year fixed rate. Nothing went wrong. The two numbers come from different places, and most people were never told which place sets their mortgage.
Your mortgage rate depends on whether it's tied to the Bank of Canada's overnight rate or to the bond market. Variable rates and lines of credit follow the first. Five-year fixed rates follow the second. Once you can tell those signals apart, renewals stop feeling random, and you can make term and borrowing decisions based on how your money actually flows.
Fixed rates are priced off a bond, not a bank announcement
Most people assume the Bank of Canada sets every rate in the country. It sets one: the overnight rate banks charge each other. Prime follows that, and variable mortgages and home equity lines of credit follow prime.
A five-year fixed mortgage is priced off the yield on five-year Government of Canada bonds. A lender funding a five-year loan looks at what five years of safe money costs, then adds a spread to cover risk, operating costs and profit. That spread has commonly sat somewhere around one to two percentage points above the bond yield.
Bond yields reflect what investors expect over the next five years. If they think inflation will stay stubborn, or that rate cuts will come slower than hoped, yields rise. Lenders then reprice fixed rates, usually a few days to a couple of weeks later.
Much of the push comes from outside Canada
Canadian bond yields are closely tied to U.S. Treasury yields. When the American economy runs hotter than expected, U.S. yields climb and Canadian yields tend to follow, even when Canada's own economy is cooling. Back in late 2024, Canadian inflation had come down to the Bank's 2% target and the Bank was cutting, yet five-year yields kept swinging, partly because of what was happening south of the border.
The spread can also widen on its own. A lender that sees more economic risk, or that has already written as many mortgages as it wants this quarter, can raise its fixed rates while bond yields barely move. A quoted rate partly reflects how eager that lender is for new business.
The practical lesson: if you hold or want a fixed rate, the five-year Government of Canada bond yield is the number to watch. Bank of Canada announcement days tell you about your line of credit.
Small moves show up in cash flow and qualification
Here is an illustrative example. On a $400,000 mortgage over a 25-year amortization, a fixed rate of 4.5% works out to roughly $2,214 a month. At 5.0%, it's about $2,326. That half point costs around $112 a month, or more than $6,700 over a five-year term, before counting the slower paydown of principal.
Qualification moves too. Under OSFI's rules you must qualify at your contract rate plus 2 percentage points or 5.25%, whichever is higher. A borrower whose contract rate rises from 4.5% to 5.0% now has to show they can carry payments at 7.0% instead of 6.5%, and that can shrink the amount a move-up buyer can borrow.
Structure your borrowing around both signals
Since fixed and variable rates can move in opposite directions, the more useful question is which piece of your debt should be tied to which signal. Trying to guess the bottom rarely works. Fixed rates often stop falling before the Bank of Canada finishes cutting, because bond investors price in those cuts ahead of time.
For anyone using a readvanceable mortgage, where the mortgage and revolving credit together can reach 80% of the home's value, the split matters a great deal. The amortizing portion may be locked to bond-driven fixed pricing while the credit line floats with prime. In a Smith Manoeuvre™, the borrowing used to invest usually sits on that prime-linked line, so a steady or falling overnight rate can keep the cost of the deductible borrowing in check even while fixed rates rise. Shorter fixed terms, or putting more equity down to reduce the loan, are other ways to limit how much any single market can affect you.
Before your next renewal, find out which number each part of your debt follows. Then decide how much of your monthly cash flow you're willing to let the bond market set.
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