Monetary Policy Limits in Housing Affordability Crisis
Central banks alone cannot solve housing affordability—supply, zoning, and government policy hold the real answers. Learn what monetary tools can and cannot do.
Housing affordability crisis
Why Interest Rates Alone Won’t Fix Your Housing Problem
You’ve probably heard it before: if the central bank just lowers interest rates, housing will become more affordable. It sounds logical. Lower rates mean lower mortgage payments, right? But according to Canada’s Senior Deputy Governor of the Bank of Canada, Carolyn Rogers, that reasoning misses something crucial about how modern economies actually work.
The reality is far more complex. Rogers recently explained to business leaders in Victoria that Canada’s housing affordability challenge cannot be resolved by monetary policy alone—and the belief that it can actually creates new economic risks.
How Housing Became Bigger Than the Economy Itself
To understand why interest rates are such a blunt tool, you need to see what’s happened to Canada’s economy over the past 25 years. In 2000, residential investment made up 4.3% of the country’s gross domestic product. Business investment in machinery, equipment, and innovation accounted for 8.3%. Those two categories were reasonably balanced.
Today, those proportions have flipped. Roughly half of all bank lending now ties directly to residential real estate. When your financial system is that heavily weighted toward one sector, home price movements stop being just housing news—they become systemic economic risk.
At the same time, the gap between what homes cost and what people actually earn has exploded. Between 2015 and 2025, home prices rose approximately 53% while incomes grew only about 13%. That’s a widening chasm that no single policy tool can close.
The Stress Test Proved Interest Rates Are a Blunt Instrument
Rogers pointed to the mortgage stress test, introduced in 2017 under her tenure at the Office of the Superintendent of Financial Institutions (OSFI), as the sharpest example of how traditional regulatory tools have limits.
The stress test did exactly what it was designed to do: it gave borrowers a financial cushion against interest rate risk and strengthened the banking system’s resilience during the 2022-23 rate cycle. But it didn’t stop home prices from climbing. That’s because addressing affordability requires tackling something interest rates cannot touch: housing supply.
As Rogers explained it, “We set one interest rate for the whole economy. We cannot set one rate for housing and another for everything else. And interest rates cannot directly address supply constraints. They can’t build homes, rezone land or speed up permits.”
This is the core insight: monetary policy is a demand-side tool. Lower rates increase demand. But Canada’s housing market isn’t struggling because demand is too weak. It’s struggling because supply can’t keep up. You can’t solve a supply problem with a demand-focused tool.
The COVID Mistake: What Happens When Cheap Money Meets Tight Supply
The pandemic offered a real-world test of this theory. In 2020, the Bank of Canada cut its benchmark rate to a floor of 0.25% to cushion the economy from an unprecedented shock. It worked—people didn’t lose their homes or jobs en masse.
But there was a side effect. Over just two years, average home prices rose roughly 50%. Why? Because cheap credit combined with a constrained housing supply and surging immigration created a perfect storm of demand chasing a fixed number of available homes.
Rogers doesn’t shy away from the Bank’s role in that outcome. She acknowledged that “the story is more complicated than low interest rates. But that doesn’t let monetary policy off the hook.” However, she’s also clear that central banks cannot be expected to solve a problem that extends far beyond their actual powers.
What the Bank Actually Examined (and Couldn’t Fully Answer)
During its five-year monetary policy framework review, the Bank of Canada tackled two specific questions that Canadians had raised. First: should the central bank lean harder against rising home prices? Second: does Canada’s inflation measure accurately capture the shelter costs households are actually experiencing?
The answers weren’t clean. In fact, they revealed another trade-off that most people don’t realize: higher interest rates push up mortgage interest costs, which then feed into inflation measurements in ways that work against the central bank’s core inflation-control objective. You can’t raise rates to cool the housing market without those same higher rates boosting measured inflation through mortgage interest—the exact thing you’re trying to control.
This is why Rogers stressed the importance of being transparent about what’s actually possible. “The most important lesson we took from our review is that we need to explain these trade-offs better and be clear with Canadians about what monetary policy can and cannot do.”
Where Real Solutions Actually Live
If interest rates can’t fix affordability, what can? According to Rogers, real progress requires three things: more housing supply, better planning and infrastructure, and a deliberate effort to reduce Canada’s economic dependence on perpetually rising home values.
None of those solutions rest with the central bank. They sit with federal, provincial, and municipal governments. Supply requires zoning reform. Infrastructure requires coordinated investment. Economic rebalancing requires policy changes that take years to implement.
This is the uncomfortable truth: affordability is fundamentally a government planning problem, not a monetary policy problem. Interest rates are just one tool in a much larger toolbox, and it’s not the right tool for this particular job.
What This Means for Your Financial Planning
If you’re saving for a home purchase or managing a mortgage, this matters. Don’t rely on the expectation that interest rates will fall significantly and bail out affordability. Build your financial plan assuming rates will stay where they are or move gradually.
Focus instead on what you can control: your savings rate, your down payment timeline, your debt levels, and your income growth. These are the levers that actually impact your personal financial security, regardless of what the central bank does next.
Key Questions About Affordability and Monetary Policy
- Can the central bank solve housing affordability by lowering interest rates? No. Lower rates increase demand in a market already constrained by supply, which can worsen affordability rather than improve it. Real solutions require building more homes and reforming zoning laws.
- Why is half of all bank lending tied to real estate such a problem? When that much of the financial system depends on housing values, a downturn in the housing market becomes a systemic economic risk affecting banks, employment, and the entire economy.
- What should I do if I’m saving for a home? Build savings discipline now rather than waiting for rates to drop. Focus on increasing your down payment, paying down other debts, and growing your income—outcomes within your control rather than dependent on central bank decisions.
Start by reviewing your current housing costs as a percentage of your income. If it’s climbing above 30% of your take-home pay, that’s a signal to reassess whether your timeline or target price needs adjustment. The central bank won’t rescue you from overstretching—only your own careful planning will.
