Why Fixed Mortgage Rates Are Rising While Lender Funding Costs Hold Steady

In 2026 the Bank of Canada has largely stopped moving its policy rate, and fixed mortgage rates have still been inching up. Lenders' funding costs have steadied too. For anyone shopping for a home in Abbotsford or facing a renewal this fall, that combination looks backwards.

It makes sense once you see where a fixed rate gets its price. A five-year fixed mortgage is a bet on what inflation will do over the next five years, and that bet is placed in the bond market, not at the central bank. If you're planning a purchase, a move or a refinance, the signal to watch is inflation news. A rate announcement usually tells you something the bond market already priced in weeks earlier.

Fixed rates follow bond yields, and bond yields follow inflation expectations

Lenders price five-year fixed mortgages off Government of Canada five-year bond yields, then add a margin. Those yields have climbed through 2026, from about 2.9% in January to roughly 3.5% in mid-October. When investors worry that inflation will stay above the Bank of Canada's 2% target, they demand a higher yield to lend money for five years. Lenders funding fixed mortgages face that same math and raise their rates to match.

Canadian yields also move closely with U.S. Treasuries. A hot American inflation report can lift Canadian bond yields the same afternoon, and lenders often reprice within days. Domestic CPI releases from Statistics Canada do the same. "Stable funding costs" describes the cost of money today. A fixed rate is priced on what money is expected to cost over the whole term.

Lenders also adjust unevenly. When yields jump, rates go up quickly to protect margins. When yields ease, lenders tend to hold their rates a little longer to win back what they gave up. Over a few months, that lag means fixed rates drift up more readily than they drift down.

Small moves cost more than they look

A quarter point sounds trivial until you run it through a Fraser Valley price.

Here is an illustrative example. On a $700,000 mortgage with a 25-year amortization, a 4.50% five-year fixed rate works out to about $3,874 a month. At 4.75%, the payment is about $3,972. That's roughly $98 more each month, close to $5,900 over a five-year term.

The bigger effect is on approval. Under the federal stress test, an uninsured borrower must qualify at the higher of their contract rate plus 2 percentage points or 5.25%. At a 4.50% contract rate, you qualify at 6.50%. At 4.75%, you qualify at 6.75%. A detached home in Abbotsford already pushes debt-service ratios close to the limit, so that extra quarter point can shrink the price range a buyer is approved for. A move-up buyer blending an existing mortgage into a larger one feels the same squeeze.

Use a rate hold to protect yourself

Nobody can reliably call the next CPI print. You can, however, stop that print from deciding your rate.

Most lenders will hold a fixed rate for 90 to 120 days once you're approved. If rates rise during that window, your held rate stands. If rates fall before you fund, many lenders will give you the lower rate. A buyer who starts house hunting without a hold is accepting whatever the bond market does in the meantime.

Renewals follow the same logic. A straight switch to a new lender at renewal, with the same balance and amortization, is exempt from the stress test for both insured and uninsured mortgages. That means you can shop your renewal and secure a hold early, without having to requalify.

The same question applies to choosing a term length, and to whether a shorter fixed term makes sense when inflation forecasts are this unsettled. Before you sign anything, ask what the next inflation report could do to your payment and to your approval, and whether you've already protected yourself against it.