Canada mortgage stress test (2026): qualification is not your payment

What the stress test really measures

Suppose a lender offers you a 4.50% contractual mortgage rate. For a newly underwritten uninsured mortgage subject to the OSFI minimum qualifying rate, it tests affordability at the higher of 5.25% and 4.50% + 2.00%: 6.50%. You would ordinarily make contractual payments at 4.50%, but the lender evaluates debt service using the higher rate.

This is an uninsured mortgage example with at least 20% down at a federally regulated lender. The mortgage insurance and qualifying rules for insured loans, credit unions, private lenders, or special lending programs may differ. A lender can also apply stricter requirements. Never treat the calculator as an approval letter.

At renewal, OSFI does not expect the same prescribed minimum qualifying rate for a straight switch of an uninsured mortgage between federally regulated lenders when the borrower does not increase either the loan amount or amortization period. Other underwriting checks still apply. A refinance, added debt or longer amortization is not the same as that narrow straight-switch exception.

A C$600,000 home example

Consider a C$600,000 purchase with C$120,000 down, leaving a C$480,000 uninsured mortgage. Using a 25-year amortization and the Canadian nominal semi-annual compounding convention, the Money Figures model produces a monthly principal-and-interest payment of approximately C$2,656.67 at 4.50% and a qualifying payment of C$3,215.15 at 6.50%. These numbers assume fixed rates and do not include mortgage insurance.

Now assume gross household income of C$120,000 annually, property tax of C$4,800 a year, C$150 monthly heating and C$400 in other monthly debt. The model includes C$550/month for property tax and heat. Its GDS is about 37.65% and TDS about 41.65%. Those results fit the common planning ratios of 39% and 44%, but are not proof of qualification. Living expenses, credit quality, lender policies, property value and other obligations still matter.

How GDS and TDS change the result

Gross debt service (GDS) is qualifying housing cost divided by gross household income. Housing cost typically includes qualifying mortgage payment, property taxes, heating and half of condominium fees. Total debt service (TDS) adds other monthly debt commitments before dividing by gross household income.

FCAC presents 39% GDS and 44% TDS as general guidance. Lenders may use different ratios based on their underwriting rules. A household with high credit-card or vehicle payments may fail the TDS test even when its housing payment alone fits GDS. The calculator also enforces a 20% down-payment ceiling on its maximum displayed uninsured purchase price; it is not a complete insured borrowing limit.

Four mistakes to avoid

• Confusing term with amortization: a five-year contract can be paid over 25 years, not five.
• Using net income for GDS/TDS: the common ratios use gross income; your own comfort budget should separately consider take-home pay.
• Ignoring cash to close: down payment, land transfer taxes, legal fees and adjustments are separate from this mortgage test.
• Assuming a passing ratio is an approval: lenders evaluate documented income, existing credit, assets, property and other criteria.

For a narrower cash estimate use the down-payment tool and closing-cost calculator. Confirm their exact coverage before committing to a purchase.