The federal mortgage stress test — formally OSFI’s B-20 Guideline — has been the most significant obstacle for Canadian homebuyers since 2018. In 2026, it remains fully in force for new mortgages and refinances, though OSFI’s 2024 renewal exemption gave switchers a meaningful advantage. Here’s everything you need to know.
How the Stress Test Works in 2026
All federally regulated lenders (banks, credit unions, monoline lenders) must qualify borrowers at the higher of:
- Your contract rate + 2.00%, OR
- The BoC minimum qualifying rate of 5.25%
With today’s best 5-year fixed at ~3.99%, your qualifying rate is 5.99%. This means you must prove you can afford payments at 5.99% — even though you’ll only pay 3.99%. The result: you qualify for approximately 20–24% less mortgage than you’d receive without the test.
Stress Test Impact by Income Level
| Household Income | Max Mortgage Without Stress Test | Max Mortgage With Stress Test | Reduction |
|---|---|---|---|
| $90,000 | ~$510,000 | ~$413,000 | –$97,000 |
| $130,000 | ~$735,000 | ~$595,000 | –$140,000 |
| $180,000 | ~$1,020,000 | ~$826,000 | –$194,000 |
6 Strategies to Qualify for More
- Add a co-borrower: Adding a spouse or family member’s income to the application can dramatically increase your qualifying amount — the stress test applies to combined income.
- Reduce TDS: Pay down or eliminate car loans, student debt, or credit card balances before applying. Each $500/month in existing debt reduces your mortgage by ~$75,000.
- Increase down payment: A larger down payment reduces the mortgage amount needed — bypassing stress test compression at the margin.
- Choose a 30-year amortization: If eligible (new construction or FTHB + insured), a 30-year amortization lowers monthly payments, improving GDS/TDS ratios.
- Use an alternative lender: Credit unions and some provincially regulated lenders are not subject to OSFI’s B-20 — though they typically charge a rate premium for higher-risk files.
- Work with a broker: Brokers know which lenders have the most flexible TDS/GDS thresholds and can optimize your file presentation before submission.
Use the free stress test calculator at mrates.ca to see your maximum qualifying mortgage before you start house hunting.