Mortgage Stress Test
Understand Canada’s mortgage stress test, how it impacts borrowing power, and what buyers can do to qualify under current regulations.
May 22, 2025
What is a Mortgage Stress Test?
The mortgage stress test is a federal requirement that ensures Canadian borrowers can afford their mortgage payments even if interest rates rise in the future.
Why Mortgage Stress Tests Matter in Real Estate
Introduced by the Office of the Superintendent of Financial Institutions (OSFI), the mortgage stress test applies to all new mortgage applications, whether insured or uninsured.
To qualify, borrowers must prove they can afford payments at:- The Bank of Canada’s qualifying rate (currently 5.25%); or
- Their contract rate plus 2%
- New home purchases
- Mortgage renewals with a new lender
- Refinancing applications
Its purpose is to reduce the risk of default and ensure borrowers aren’t over-leveraged in fluctuating economic conditions. While it lowers maximum borrowing amounts, it also promotes financial stability.
Buyers who fail the stress test may need to:- Increase their down payment
- Choose a less expensive home
- Work with alternative lenders
Understanding the stress test helps buyers prepare for approval hurdles and align their expectations with what lenders will offer.
Example of a Mortgage Stress Test
A borrower offered a mortgage at 4.7% must qualify at 6.7% (4.7% + 2%) under the stress test, reducing their maximum purchase budget by $50,000.
Key Takeaways
- Required for most mortgage approvals.
- Uses higher qualifying rate to test affordability.
- Reduces max borrowing capacity.
- Aims to prevent financial overextension.
- Crucial to factor into purchase planning.
Related Terms
- Mortgage Pre-Approval
- Debt Service Ratios
- Interest Rate
- Refinance
- Alternative Lender
National average resale-price growth and housing-starts growth, smoothed over three months. The comparison illustrates the cycle; it does not establish how much a price change causes construction to change.
Trailing 12-month starts in centres of 50,000 or more remove the usual monthly seasonality. Ownership combines the homeowner and condominium categories; rental is shown separately.
Six-month averages of provincial starts, expressed at annual rates. The smoothing reduces the influence of individual apartment projects.
The same August benchmark compared with two different starting points. Three-month changes are not annualized.
Average sale prices show the difference in purchase costs across markets. They do not measure affordability relative to local incomes or construction costs.
Newfoundland and Labrador remains above its pre-pandemic sales pattern, but August activity was below last year. Historical lines retain their original release vintages.
Average and median describe different aspects of the same month’s transactions. Both are affected by the mix of homes sold.
Category averages compare different homes and locations; the gaps are not estimates of the cost to upgrade an otherwise identical property.
The five categories shown account for 5,000 of the board’s 5,057 sales. The remaining 57 transactions were in other housing categories.
Monthly observations are not seasonally adjusted. Active listings count properties available at month-end; they are not construction inventory.
Average and median prices share one dollar axis. These unadjusted transaction measures do not control for changes in the homes sold.
TRREB’s 416/905 categories compare the apartments sold in each area. The difference does not isolate a location premium for equivalent units.
5680 Oak Street in Vancouver and its surrounding context. (MCMP Architects)
Ground-level renderings of the tower proposed for 5680 Oak Street in Vancouver. (MCMP Architects)
