What Is the Mortgage Stress Test?
The mortgage stress test is a federal regulation introduced under OSFI's B-20 guideline. It requires all mortgage applicants at federally regulated lenders to qualify at a rate higher than the one they will actually pay. The purpose is to ensure borrowers can still afford their payments if interest rates rise during their mortgage term.
The stress test applies to all new mortgages, renewals with a new lender, and refinances at federally regulated institutions. It was first introduced in 2018 and has been one of the most significant factors limiting borrowing capacity in Canada since.
Importantly, the stress test does not change your actual mortgage payment — it only affects how much you are allowed to borrow. You still pay the contracted rate. The qualifying rate is used solely as a mathematical test during the approval process.
The Current Qualifying Rate (2026)
The qualifying rate is the higher of the following two numbers:
- Your contracted mortgage rate plus 2.00%, or
- The Bank of Canada's benchmark qualifying rate (currently 5.25%)
For example, if you are offered a 5-year fixed rate of 3.94%, your qualifying rate would be 5.94% (3.94% + 2.00%), since that exceeds the 5.25% benchmark floor. Your actual payment remains based on the 3.94% contracted rate, but the lender must verify you could handle payments at 5.94%.
How the Stress Test Affects Your Buying Power
The stress test directly reduces the maximum mortgage amount you can qualify for. At a qualifying rate of 5.94% versus an actual rate of 3.94%, the difference in buying power is substantial.
Buying Power Impact: $100,000 Household Income
Assumes 25-year amortization, no other debts, 5% down payment
| Scenario | Qualifying Rate | Max Mortgage |
|---|---|---|
| Without stress test | 3.94% | ~$575,000 |
| With stress test | 5.94% | ~$460,000 |
| Reduction | — | ~$115,000 |
Use our affordability calculator to see exactly how the stress test affects your personal buying power based on your income and debts.
Who Does the Stress Test Apply To?
The B-20 stress test applies to all mortgage applications at federally regulated lenders, which includes all of Canada's major banks, credit unions operating under federal charter, and most monoline lenders. Specifically:
- New home purchases — every buyer must pass the stress test to get approved for a federally regulated mortgage.
- Refinances — if you are refinancing your mortgage (changing the amount or amortization), the stress test applies.
- Switching lenders at renewal — if you move your mortgage to a different lender at renewal, you must requalify under the stress test.
- Renewals with your current lender — this is the one exception. If you stay with your existing lender at renewal, you do not need to requalify under the stress test.
Strategies to Maximize Your Qualification
While you cannot avoid the stress test at a federally regulated lender, there are legitimate strategies to maximize the mortgage amount you qualify for:
Pay down existing debt
Your total debt service ratio (TDS) includes all monthly obligations — car loans, credit card minimums, lines of credit. Paying down or consolidating these debts before applying directly increases the mortgage amount you qualify for.
Extend your amortization
A 30-year amortization (available with 20% or more down payment) reduces monthly payments and increases qualification. First-time buyers with insured mortgages are now eligible for 30-year amortization as of late 2024.
Add a co-borrower
A spouse, partner, or family member can be added to the application. Their income is included in the qualification calculation, which can significantly increase your borrowing capacity.
Consider a longer fixed term
Since the qualifying rate is your contract rate plus 2%, a lower contract rate means a lower qualifying rate. Fixed rates are currently lower than variable rates would need to be to reduce the qualifying rate, so a 5-year fixed term often produces the best qualification result.
Explore alternative lenders
Credit unions regulated provincially (not federally) may apply different qualification standards. Some B-lenders have more flexible approaches to the stress test. However, rates at these lenders may be slightly higher.
The Stress Test and Renewals
With approximately 60% of Canadian mortgages renewing in 2025 and 2026, the stress test has become a significant factor in renewal decisions. If you stay with your current lender, no requalification is required. But if you want to switch to a different lender offering a better rate, you must pass the stress test again.
This creates a situation where some borrowers feel locked in with their current lender, even if better rates are available elsewhere. For a detailed walkthrough of your options, see our mortgage renewal guide.
Key Takeaways
- The stress test requires you to qualify at your contract rate plus 2% or the 5.25% benchmark, whichever is higher.
- It reduces your maximum borrowing capacity by roughly 20% compared to qualifying at the actual rate.
- It applies to all new purchases, refinances, and lender switches — but not to renewals with your existing lender.
- Paying down debt, extending amortization, and adding a co-borrower are the most effective strategies to qualify for more.
- Alternative and provincially regulated lenders may offer more flexible qualification, but typically at slightly higher rates.
See How Much You Qualify For
Our affordability calculator factors in the stress test automatically. Find out your maximum purchase price in under two minutes.
Free to use. No obligation. No credit check required.