Mortgage stress test in Canada: how it works
Quick summary
The mortgage stress test means a lender checks that you could afford your payments at a higher "qualifying rate": the greater of your mortgage rate plus 2 percentage points, or 5.25%. You do not pay that higher rate. It only decides how much you can borrow. Next step: put your numbers in our mortgage stress test calculator.
The rule in plain words
Canada's banking regulator, the Office of the Superintendent of Financial Institutions (OSFI), sets a minimum qualifying rate for uninsured mortgages: the greater of the mortgage contract rate plus 2%, or 5.25%. The Financial Consumer Agency of Canada (FCAC) says the same qualifying rate applies to insured and uninsured mortgages at banks. Two parts to remember: a 2% buffer (your rate plus 2 percentage points) and a 5.25% floor (even if your rate is low, you are tested at 5.25% at least). You get whichever number is higher.
Examples
| Your mortgage rate | Rate plus 2% | Floor | You are tested at |
|---|---|---|---|
| 3.00% | 5.00% | 5.25% | 5.25% |
| 3.25% | 5.25% | 5.25% | 5.25% |
| 3.50% | 5.50% | 5.25% | 5.50% |
| 4.00% | 6.00% | 5.25% | 6.00% |
| 4.50% | 6.50% | 5.25% | 6.50% |
| 5.50% | 7.50% | 5.25% | 7.50% |
These are examples of the rule, not current market rates. Ask a lender for the rate it will offer you today. At rates up to 3.25%, the 5.25% floor decides. Above 3.25%, rate plus 2% decides.
What it does to how much you can borrow
Our calculation assumes monthly payments, semi-annual compounding and a 25-year amortization. Your lender's figures may differ slightly. Flip it around: if you can carry about $2,679 a month at the qualifying rate, the most you can borrow is about $400,000. Without the stress test, the same payment at 4.50% would support about $484,000. So the test lowers borrowing power by about 17% in this example. The lender also looks at your income, debts, down payment and credit. The stress test is one check among several.
What else lenders add up
The qualifying rate only sets the payment. Lenders then compare your costs to your income. GDS (gross debt service) is your housing costs as a share of income: mortgage payment, property tax, heat and half of any condo fees. TDS (total debt service) adds your other debts, such as car loans and credit card minimums.
For insured mortgages, CMHC says it allows up to 39% GDS and 44% TDS for borrowers with a strong history of managing payments, and at least one borrower needs a credit score of 600 (CMHC notice, July 2021). Many lenders use tighter limits, so a pass here is not an approval.
Your down payment sets the size of the loan. The minimum is 5% of the first $500,000 and 10% of the rest, and 20% for homes of $1.5 million or more. Insurance covers homes under $1.5 million, and 30-year amortizations are open to first-time buyers and buyers of new builds (Government of Canada, December 2024). A smaller down payment adds a CMHC premium to your mortgage, which raises the payment you are tested on.
Who has to take the test
- Banks and other federally regulated lenders apply the test (FCAC).
- Some lenders that are not federally regulated may also use a stress test (FCAC). Ask before you apply.
- Existing homeowners must pass the test again if they refinance or open a home equity line of credit (FCAC).
When you do not need to pass it again
OSFI does not expect the minimum qualifying rate to apply to an uninsured mortgage straight switch at renewal. That means moving an uninsured mortgage to another federally regulated lender, as long as the amortization period and the loan amount do not increase.
How to pass if you are close
These are general ideas, not promises.
- Lower your other debts. Paying down a car loan or card balance leaves more room in the lender's calculation.
- Save a larger down payment. A smaller loan means a smaller payment at the qualifying rate.
- Add a co-borrower, if it fits your situation and the lender accepts their income and debts.
- Compare lenders. Rates and rules differ, and a lower contract rate lowers the rate you are tested at, unless the 5.25% floor applies.
- Check your credit report first, because errors can cost you rate. free credit report guide
- Use a calculator before you apply. mortgage stress test calculator
Questions people ask
What is the mortgage stress test rate in Canada?
It is the greater of your mortgage contract rate plus 2%, or 5.25%, according to OSFI. OSFI says it reviews the floor and buffer at least once a year.
Do I pay the stress test rate?
No. You pay your actual contract rate. The qualifying rate only decides how much you can borrow.
Does the stress test apply to insured mortgages?
Yes. FCAC says the qualifying rate applies to both insured and uninsured mortgages at banks.
Do I need to take the stress test when I renew?
Not for an uninsured straight switch to another federally regulated lender if your loan amount and amortization do not increase (OSFI). If you refinance, you must pass again (FCAC).
Has the rule changed?
OSFI confirmed the same rule in December 2023, and its page was last updated on January 29, 2026 with the same rule. OSFI can change it, so check the source before you rely on this page.