Canada’s Mortgage Stress Test in 2026: How the Qualifying Rate Works

The stress test isn’t a standalone law. It’s an underwriting requirement set out in OSFI’s Guideline B-20 (Residential Mortgage Underwriting Practices and Procedures). According to OSFI, it obliges federally regulated lenders — the major banks among them — to qualify borrowers at a rate higher than the actual contract rate, so that payments can still be made if income drops, expenses rise, or interest rates climb.

It covers both insured mortgages (less than 20% down, mortgage insurance required) and uninsured mortgages (20% or more down). Both are run against the same qualifying-rate formula.

How the qualifying rate is calculated

According to OSFI (2026), the qualifying rate is the higher of these two numbers:

• Contract rate + 2% — the rate you actually negotiate, plus two percentage points; and
• the 5.25% floor — no matter how low your contract rate goes, the test can’t drop below this.

Two examples. If your five-year fixed rate is 4.29%, then 4.29% + 2% = 6.29%, which beats the floor, so you’re tested at 6.29%. If you land a 3% promo rate, 3% + 2% = 5%, which is below the floor, so you’re tested at 5.25%. OSFI reviews both the floor and the buffer at least once a year.

The late-2024 change: switching lenders at renewal

This is the most practical change in years. According to OSFI (2024), effective November 21, 2024, OSFI no longer prescribes the minimum qualifying rate for a “straight switch” of an uninsured mortgage between federally regulated institutions.

A straight switch means you move the mortgage from one lender to another at renewal with no increase in the loan amount and no increase in the remaining amortization. OSFI allows the principal to rise by up to $3,000 to cover transaction costs, but no equity take-out is permitted. Before this change, uninsured borrowers had to re-qualify under the stress test to switch lenders, while insured borrowers did not — the new rule closes that gap.

The exemption has hard edges. Trip any of these and it’s no longer a straight switch, so the lender can still require a qualifying-rate test: (1) you increase the loan amount (e.g. a cash-out refinance); (2) you extend the amortization; or (3) the principal grows beyond the $3,000 cost allowance. Also note that what’s waived is OSFI’s prescribed MQR — lenders still assess your ability to repay under Guideline B-20, including debt-service ratios (GDS/TDS). Approval is ultimately the lender’s call. Source: OSFI (2024).

How the test shapes your buying power

The one-line version: your approval amount is driven by the qualifying rate, not the rate you actually pay. Because the qualifying rate sits two points above your contract rate (or at the 5.25% floor), the assumed payment is higher, and the largest loan that still passes the debt-service test comes down accordingly.

For insured mortgages there’s a second gate on top. According to CMHC, the Gross Debt Service (GDS) ratio can’t exceed 39% and the Total Debt Service (TDS) ratio can’t exceed 44%. So your buying power is bounded by both the qualifying rate and these ratios at once. The reliable way to know your real number is to get a genuine pre-approval that runs both gates — not a back-of-envelope estimate off your contract rate.

Q: What is the mortgage stress test qualifying rate in Canada for 2026?

According to OSFI, the minimum qualifying rate (MQR) is the greater of your mortgage contract rate plus 2% or 5.25%. OSFI confirmed on January 29, 2026 that this rule is unchanged. Example: at a 4.29% contract rate you qualify at 6.29%; at a 3% contract rate you qualify at the 5.25% floor. Source: OSFI (2026).

Q: Do I still have to pass the stress test if I switch lenders at renewal?

Since November 21, 2024, OSFI no longer prescribes the minimum qualifying rate for a “straight switch” of an uninsured mortgage. A straight switch means no increase in the loan amount or the remaining amortization (up to $3,000 may be added to cover transaction costs, with no equity take-out). Lenders still assess your ability to repay under Guideline B-20. Source: OSFI (2024).

Q: Does the stress test apply to insured mortgages with less than 20% down?

Yes. At federally regulated lenders, both insured and uninsured mortgages are tested against the same minimum qualifying rate (the greater of contract rate plus 2% or 5.25%). Insured mortgages also have to meet CMHC debt-service limits: a GDS ratio no higher than 39% and a TDS ratio no higher than 44%. Source: OSFI, CMHC (2026).

Q: How does the stress test reduce my buying power?

Your lender approves you based on the higher qualifying rate, not the rate you actually pay. The lower your contract rate, the more likely the 5.25% floor kicks in, and the loan amount you can carry at that rate is smaller than what your actual rate would allow. So for the same income, the stress test typically lowers your maximum mortgage.