Switching Mortgage Lenders: Need to Retake the Stress Test?

Canada’s decision to ease a long-standing mortgage “stress test” requirement was influenced in part by concerns about how the regulator was perceived by the public, Office of the Superintendent of Financial Institutions (OSFI) superintendent Peter Routledge said.

Addressing an audience at the Global Risk Institute summit, Routledge explained that the way the rule was being applied — requiring lenders to use the “OSFI stress test” when assessing certain uninsured mortgages — created an impression among some borrowers that the regulator was intervening directly in their personal financial decisions.

“If I were that borrower, I might feel like I was being regulated by OSFI,” Routledge said. “We heard that consistently from Canadians, and that perception was never the intent of our rules.”

Last week OSFI announced that, effective Nov. 21, lenders will no longer be required to apply the agency’s stress test for uninsured mortgages when a borrower is simply switching lenders without changing key loan terms such as the amortization period or the principal amount. The change targets straightforward rate-shopping or portability moves where borrowers keep their loan structure intact.

OSFI’s analysis showed that only a small portion of borrowers — roughly 2% to 6% — make this kind of purely administrative lender-to-lender switch. Given that low incidence and the modest prudential benefit in those specific cases, Routledge said the regulator concluded the burden and the negative perception it created were not justified.

“The prudential risk associated with these simple switches was not large enough to warrant the appearance of unfairness or the sense that we were regulating individuals directly,” he added.

Why OSFI decided to change the stress test

The decision to remove this particular stress test requirement comes as OSFI evaluates a broader shift in how mortgage risk is managed. Rather than focusing primarily on borrower-level assessments under guidelines like B-20, the regulator is exploring a framework that would set limits and controls at the bank portfolio level.

Under the alternative system OSFI plans to pilot next year, the emphasis would be on constraining the proportion of a bank’s mortgage book that is concentrated in higher-risk loans—such as those with elevated loan-to-income ratios—rather than applying a single stress test to every uninsured mortgage in every circumstance.

OSFI will test this portfolio-based approach before deciding whether to add it to the existing mortgage rule set or supplant the current stress-test regime. Routledge noted that, in addition to potentially better capturing concentration risks, the portfolio approach would be less likely to be perceived as directly regulating individual borrowers.

“By focusing on institutions and the composition of their loan books, OSFI believes it can preserve credibility while addressing systemic risk,” he said. “This allows us to ‘stick to our knitting’ and regulate financial institutions rather than being viewed as regulating individual borrowers.”

Change follows new mortgage rules

OSFI’s update came shortly after the federal government relaxed some mortgage-related rules, including adjustments to the insured mortgage price cap and expanded access to longer amortization options for qualifying borrowers. Routledge emphasized that the decision to ease the stress-test requirement was driven by public perception and prudential judgment rather than political influence.

On the government’s recent measures, Routledge said they represent a modest increase in risk but are not, in his view, material enough to threaten the medium- or long-term safety and soundness of the banking sector.

Overall, he described the risk outlook for Canada’s residential lending sector as improved relative to a year ago. While some deterioration in borrower metrics has been recorded, the change has been gradual and remains manageable, and the evidence suggests households have been navigating these conditions reasonably well.

“We’ve seen some deterioration in certain indicators, but it’s been gradual and contained,” Routledge said. “At present, households have generally managed through the cycle without widespread stress.”

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