The mortgage stress test is one of the most misunderstood parts of buying a home in Canada. Here's everything you need to know.
What Is the Mortgage Stress Test?
The stress test is a federal rule requiring that mortgage borrowers qualify at a rate higher than their actual contract rate. Its purpose is to ensure you can afford your mortgage payments even if interest rates rise after you buy.
It applies to all mortgages from federally regulated lenders — banks, federal credit unions, and most trust companies.
How Is It Calculated?
You must qualify at the higher of:
- Your contract rate + 2%, OR
- 5.25% (the current qualifying rate floor)
Example: If your lender offers you a rate of 5.0%, you'll be stress-tested at 7.0% (5.0% + 2%). If your rate is 3.0%, you'd be tested at 5.25% (since 3.0% + 2% = 5.0%, which is less than 5.25%).
Does It Apply to Everyone?
The stress test applies when:
- You're taking a new mortgage with any federally regulated lender
- You're switching lenders at renewal
- You're refinancing your mortgage
It does not apply when:
- You're renewing with your existing lender (same lender, same terms)
- You're borrowing from a private lender (though private lenders have their own requirements)
How It Affects How Much You Can Borrow
The stress test can reduce your maximum mortgage by 15–20%. Here's a simplified example:
| Contract Rate | Stress Test Rate | Approx. Max Mortgage (on $150K income) | |---------------|------------------|-----------------------------------------| | 5.0% | 7.0% | ~$700,000 | | 4.5% | 6.5% | ~$750,000 | | 3.5% | 5.25% | ~$850,000 |
Estimates only — based on 25-year amortization, $150K income, minimal other debts.
Tips to Strengthen Your Application
- Pay down existing debts — car loans, student loans, and credit card balances all reduce your TDS ratio
- Increase your down payment — a larger down payment means a smaller mortgage, making qualifying easier
- Add a co-borrower — a spouse or family member's income can increase your qualifying amount
- Choose a longer amortization — if you qualify for an insured mortgage (under 20% down), up to 30 years may be available for first-time buyers purchasing new builds
Use Our Affordability Calculator
Want to see exactly how much you qualify for under the stress test? Try our Mortgage Affordability Calculator — it applies the stress test automatically.
Have questions about qualifying? Contact us for a free consultation.