The mortgage stress test is a federal rule that makes you qualify for your mortgage at a higher rate than the one you’ll actually pay. It exists to make sure borrowers can still afford their payments if rates rise, and it’s the main reason many buyers are approved for less than they expected.
The stress test doesn’t change the rate you pay. It only changes how much you can borrow. Here’s how it works, how much difference it makes, and what you can do about it.
How the stress test works
For mortgages from federally regulated lenders, such as banks, you must qualify at the higher of:
- 5.25%, or
- your contract rate plus 2 percentage points.
This applies to both insured mortgages (less than 20% down) and uninsured ones. OSFI, the federal banking regulator, reviewed the rule again in early 2026 and left it unchanged.
Qualifying rate vs. the rate you’re offered
Examples
| Rate you’re offered | Rate you must qualify at |
|---|---|
| 3.00% | 5.25% (floor applies) |
| 3.95% | 5.95% |
| 4.59% | 6.59% |
| 5.25% | 7.25% |
How much it reduces what you can borrow
Lenders calculate your maximum payment using debt service ratios (GDS and TDS), then work backwards to a mortgage amount using the qualifying rate. Here’s what that means for a household that can qualify for a $3,000 monthly mortgage payment on a 25-year amortization:
Maximum mortgage for a $3,000 qualifying payment
When the stress test doesn’t apply
- Renewing with your current lender: no requalification is required.
- Straight switch at renewal: moving your mortgage to a new federally regulated lender without increasing the amount or extending the amortization.
- Some provincially regulated lenders: credit unions and private lenders aren’t bound by OSFI’s rule, though many apply similar tests.
A refinance, adding a HELOC, or increasing your mortgage at renewal all trigger the stress test again.
The newer piece: loan-to-income limits
Since 2025, OSFI has also limited how much of each bank’s new uninsured lending can go to borrowers with loans above 4.5 times their income. This is a portfolio-level limit on lenders, not a hard cap on each borrower, but it can make very high loan-to-income files harder to place at some banks.
How to improve your chances
Ways to qualify for more (or need less)
Pay down other debts
Removing a car or credit card payment frees up room in your TDS ratio, often more than any other change.
Add a co-borrower
Another income on the application can raise your maximum significantly.
Increase your down payment
Consider a longer amortization
First-time buyers and new-build buyers can choose 30 years on insured mortgages, which lowers the qualifying payment.
Document all your income
Bonuses, commissions, rental income and self-employed income may count if properly documented.
Examples use illustrative rates and Canadian semi-annual compounding, and are rounded. They are not rate quotes or advice. Last reviewed September 2026.