What the mortgage stress test measures
The stress test checks your ability to carry a mortgage using a qualifying interest rate above the rate in the contract. It creates a buffer in the application; it does not change the interest rate you actually pay.
For the usual bank qualification calculation, compare the 5.25% floor with the contract rate plus two percentage points and use the higher number. FCAC describes this approach for both insured and uninsured mortgages. Exceptions and lender-specific underwriting still need to be checked.
Work the formula in the right order
First add two percentage points to the proposed contract rate. Then compare that result with 5.25%. Do not use the floor automatically.
The examples below illustrate the qualifying rate only. To estimate a maximum mortgage, the lender must also assess the balance, amortization, income, debts, housing costs and any financed default-insurance premium. A rate example alone cannot establish an affordable home price.
| Contract rate | Contract rate + 2 points | Qualifying rate |
|---|---|---|
| 2.75% | 4.75% | 5.25% |
| 3.25% | 5.25% | 5.25% |
| 4.49% | 6.49% | 6.49% |
| 5.00% | 7.00% | 7.00% |
Uses the higher of the two rates. These are examples, not current mortgage offers.
Buying, refinancing or renewing: what changes?
A new purchase and a refinance are different from an unchanged renewal. Tell your broker whether you are taking additional cash, extending repayment or changing borrowers; the transaction type affects the review.
Since November 21, 2024, OSFI no longer prescribes a minimum qualifying rate for an uninsured straight switch between federally regulated lenders at renewal when neither the loan amount nor amortization increases. The receiving lender still applies its own underwriting and may assess current and future payment ability.
An unchanged renewal with the existing lender generally does not involve the same qualification process as a new application. Confirm the actual offer and conditions. Insured transfers have their own requirements; ask the receiving lender or insurer to confirm eligibility.
| Your situation | What to confirm |
|---|---|
| Buying a home | Qualifying rate, income, debts, property acceptance and insurance |
| Refinancing or accessing equity | A new qualification review and the applicable stress test |
| Renewing with the same lender | Whether any change to balance, amortization or borrowers triggers reassessment |
| Uninsured straight switch at renewal | Whether the OSFI exception applies and what the new lender requires |
| Switching an insured mortgage | Transfer eligibility and insurer/lender requirements |
Know which rule applies to your lender
OSFI supervises federally regulated financial institutions. Its residential mortgage underwriting guideline and its minimum qualifying rate announcements are the primary sources for those lenders.
Provincially regulated lenders may have different requirements. A different regulatory framework does not mean a lender will approve an unaffordable application or ignore repayment risk. Compare the written requirements and complete cost before selecting an alternative.
Improve the application without stretching the budget
Ask the broker to change one input at a time so you can see which action actually improves the result. Paying down a debt may be more useful than adding the same amount to the down payment, or the reverse, depending on the application.
- Reduce existing monthly debt obligations where practical.
- Compare a smaller mortgage or a lower purchase price.
- Check whether a larger down payment changes the insurance premium.
- Consider an eligible longer amortization, while comparing the additional interest over time.
- Document the income the lender can use, especially variable or self-employed earnings.
- Ask what a co-borrower would be responsible for before involving one.
Qualification is not your household spending plan
Lenders calculate debt-service ratios using qualifying housing payments and gross income. Your day-to-day budget needs take-home pay, actual expenses and savings goals.
Include property tax, insurance, utilities, strata fees if applicable, maintenance, childcare and other commitments. Leave room for changes in income or unexpected repairs. Passing the stress test does not mean you should borrow the maximum.
If the first calculation does not work
Ask which part of the application is limiting the result: income, debt payments, down payment, property or credit. That gives you a useful next step instead of repeatedly applying with the same numbers.
A different lender may assess a situation differently, but higher-cost borrowing needs a realistic repayment plan. Compare waiting and improving the application alongside any alternative mortgage.
Check the rule before the application
Use the current OSFI and FCAC guidance linked below, then confirm how the receiving lender will treat your transaction. A forecast about future rule changes is not an approval basis.
Our stress-test and affordability calculators help you explore the inputs. A broker review connects the estimate to the property, documents and lender conditions.