Canadian households hoping for cheaper mortgages just got bad news. Hotter-than-expected inflation data has sent Government of Canada (GoC) bond yields soaring, wiping out any progress made in 2025. The move means higher fixed-rate mortgages are on the way, and they’ll climb further if yields continue to rise.
Government Borrowing & Your Mortgage Rate
Credit is market-based: Borrowers compete for capital from investors looking at similar risks and time frames. The Bank of Canada (BoC) overnight rate influences variable-rate mortgages since they’re both based on overnight borrowing. Fixed-rate mortgages move with GoC bond yields of similar lengths—i.e., a 5-year fixed-rate mortgage is a premium over the 5-year GoC bond yield.
Bond yields are based on supply and demand. Yields fall as available capital outpaces borrowing demand—you don’t pay a premium if everyone wants to lend you money. Conversely, yields rise when borrowing exceeds available capital, and borrowers pay higher interest to keep investors interested. It’s not discussed often, but this is why the scale of government debt relative to the economy is important.
Lenders then add a spread (risk premium) to the yield to cover operating costs, default risk, and profits. Canadian mortgage lenders generally add between 150-200 basis points (bps), depending on competition and risk at the time.
Mortgage Rates Set To Rise As Bond Yields Surge
Canadian bond yields are rising aggressively this week, as inflation expectations climb. The 5-year GoC bond yield rose 7.5 bps in intraday trading to 2.961% at noon, after adding 10.9 bps after yesterday’s inflation announcement. The yield has climbed 18.3 bps since last week’s close, and it’s only Wednesday.
All of the progress made in 2025 has rolled back and is now slightly higher than the year started (+2.1 bps). That said, this is still lower than this time last year (-69 bps). It’s just heading in the wrong direction from where most people are hoping.
Mortgage rates may not fully reflect the move, especially when it happens this fast. Based on recent history, one can expect a 5-year fixed mortgage between 4.46% and 4.96% based on this yield—depending on the market, lender, and demand.
Inflation Is Slipping Out of The Bank of Canada’s Control
Canadian bond yields are suddenly heading higher based on inflation expectations. Most people heard that inflation fell yesterday in response to the GoC dropping the consumer carbon tax, but that was only the headline data. The BoC-preferred CPI-core measures of inflation, which eliminate volatile and temporary influences, actually accelerated last month. Both of the central bank’s key CPI-core metrics are now above its inflation tolerance range.
Ironically, the BoC’s rush to cut rates quickly may prove counterproductive.