The Bank of Canada Hasn’t Moved. So Why Are Fixed Rates Going Up?

Two Rates, Two Drivers

Canada has two separate forces driving mortgage rates, and most borrowers in the country are unaware of either. Variable rates move with the BoC overnight rate, so when the BoC acts, the prime rate applies within one to two days of the announcement.

Fixed rates are priced off Government of Canada bond yields, specifically the five-year federal bond for fixed mortgages running on the same time window. Bond yields move based on what global markets predict inflation, growth, and risk to be over the next five-year period. The BoC has no direct control over them as a financial institution.

What Is Pushing Yields Higher

In early 2026, the five-year federal bond yield sat around 3%. By August, it had climbed to approximately 3.18% to 3.23%, which pushes fixed mortgage rates higher even as the BoC held firm. The main driver is external pressure from global markets influenced by international events.

The US war on Iran has pushed global oil prices higher and sent US Treasury yields up, pulling Canadian bond yields with them. This is because our Canadian yields follow the US Treasuries closely, as the two national economies are deeply integrated as massive trading partners and neighbours. The Canada-United States-Mexico Agreement (CUSMA) trade uncertainty adds a second layer; markets are pricing in a risk premium on Canadian long-term bonds under yearly
trade reviews in progress. The result is fixed mortgage rates rising, despite the BoC not moving rates in over a year.

The speed of that mechanism is worth understanding. When US Treasury yields moved higher in July 2026 following the Federal Reserve's FOMC statement, Canadian five-year bond yields followed within days, not weeks. Lenders began repricing fixed mortgage products almost immediately. Borrowers who had been quoted a rate on a Monday found the same product had moved by the following Thursday, before they had finished gathering their documents.

The CUSMA element is worth watching separately from the Iran situation. Oil prices and geopolitical conflicts can reverse quickly if a ceasefire or diplomatic agreement changes the picture. Trade policy is slower moving. Yearly review cycles mean the risk premium CUSMA uncertainty adds to Canadian bonds is likely to persist through at least the first half of 2027 regardless of what happens with oil. Anyone deciding between a one-year fixed and a five-year fixed right now is making two separate calls.

What This Means for Borrowers

Choosing between fixed and variable rates right now means taking two different chances simultaneously. A variable rate is a bet the BoC stays on hold for the current interest rate or cuts it lower in the future. A fixed rate can be described as a bet that global bond yields do not push rates materially higher during your loan term.

As of August 2026, the best insured five-year fixed rate is approximately 4.09%, and the best variable is approximately 3.35%, a spread of about 74 basis points in favour of variable rates. That range favours variable rates if the Bank holds or cuts. But if bond yields keep climbing, locking in at 4.09% today could prove the smarter call in hindsight.

To put the 74 basis point spread in dollar terms: on a $500,000 mortgage with a 25-year amortization, the monthly payment difference between 4.09% fixed and 3.35% variable is approximately $210 per month. Over a five-year term, that is roughly $12,600 in savings if the variable rate stays where it is. The calculation changes if variable rates move 50 basis points higher, which they would if the BoC hikes once before year end. National Bank and Scotiabank are currently forecasting exactly that. At 3.85% variable, the monthly savings shrink to around $75, and the certainty of the fixed rate starts to look more valuable.

A shorter-term option is also worth knowing about. Some lenders are currently offering two-year fixed rates in the 3.70% to 3.80% range, sitting between today’s variable and the five-year fixed. For borrowers who want some payment certainty without committing to five years at 4.09%, a two-year term locks in a ceiling while leaving open the possibility of renewing into a lower rate environment in 2028 if the bond market picture has improved. It is not the right answer for everyone, but it is a choice many borrowers are not aware of.

The Bank of Canada’s September 2 rate statement acknowledged that upside risks to inflation have increased and that new tariffs make the growth outlook more uncertain. The governing council did not signal a move in either direction. The bond market had already moved on its own, pushing fixed mortgage rates higher without any decision from the Bank.

When to Talk to a Mortgage Broker

A mortgage broker can show you the real monetary difference between fixed and variable rates at the balance and amortization you have as an individual, and which lenders are offering the most competitive rates for each right now. Given that fixed and variable rates are driven by completely different factors in markets, the conversation is worth having before signing anything or choosing between the two.