The Bank of Canada raised its overnight rate by 25 basis points in March, the same magnitude as the Federal Reserve's move two weeks earlier. That pattern has repeated six times since late 2022. When economists describe the BoC as having "monetary policy independence," they are describing a legal framework, but the actual correlation between Canadian and U.S. rate movements over the past four years exceeds 90%.

The bond market enforces this correlation. Fixed mortgage rates in Canada are priced off the yield on 5-year Government of Canada bonds. That yield, in turn, moves in near-lockstep with the U.S. 5-year Treasury. When the Fed signals a hike, U.S. Treasury yields rise. Canadian bond yields follow within days, often before the Bank of Canada has even held a meeting. By the time the BoC decides whether to hike, Canadian fixed mortgage rates have already moved.

The currency adds a second layer of constraint. If the BoC holds rates steady while the Fed hikes aggressively, the Canadian dollar weakens. A weaker loonie raises the cost of imports, fuel, electronics, food inputs, effectively importing inflation into Canada. The BoC then faces a choice: hike rates to defend the currency and curb import inflation, or accept higher domestic price pressures and explain to the public why inflation is rising despite ostensibly independent policy. In practice, the central bank hikes.

Why the lag matters more in Canada

The structure of the Canadian mortgage market makes rate changes hit harder here than in the U.S. The American market is dominated by 30-year fixed mortgages. A homeowner who locked in a 3% rate in 2021 will pay 3% until 2051, regardless of what happens to central bank policy.

Canada's market is built on 5-year terms. A borrower who took a fixed rate at 1.79% in 2021 will renew in 2026, likely at a rate above 4.5%. The monthly payment on a $500,000 mortgage at 1.79% is roughly $2,150. At 4.5%, the same balance costs $3,100. The difference is $950 per month, or $11,400 per year.

The Canadian Bankers Association estimates that over $300 billion in mortgages will renew between 2025 and 2026. Most of those renewals involve households moving from the record-low rates of 2020-2021 to a rate environment shaped by eight consecutive quarters of tightening. The impact arrives 18 to 24 months after the Fed hikes, when those renewals settle.

The neutral rate problem

The Bank of Canada currently estimates the neutral rate, the level that neither stimulates nor restrains the economy, sits between 2.25% and 3.25%. The overnight rate target is 4.25%. That means policy is restrictive by roughly 100 to 200 basis points. The Fed's comparable rate sits at 5.25%, with a neutral range estimated between 2.5% and 3.5%.

Both central banks are running restrictive policy, but Canada's household debt-to-income ratio is among the highest in the G7. Canadian consumers are more leveraged than their American counterparts. A 25-basis-point hike in Canada typically produces a larger cooling effect on GDP than the same move in the U.S. The BoC cannot match the Fed point-for-point without risking a severe contraction in household spending.

That creates the current stalemate. The Fed hikes to control inflation. Canadian bond yields follow. Fixed mortgage rates rise. The BoC then faces pressure to hike because holding steady would trigger currency depreciation and imported inflation. The system is independent in name. In practice, it follows.