The Mortgage Stress Test: What You Need to Know

Since 2018, every borrower at a federally regulated lender has had to prove they could afford their mortgage at a rate higher than the one they'll actually pay. That rule, the stress test, quietly sets the ceiling on what most Canadians can buy.

The rule

You must qualify at the greater of your contract rate plus 2%, or 5.25% (the floor). Sign at 4.5% and the lender runs your ratios at 6.5%. Your payment is still calculated at 4.5%, the higher rate exists only for qualification.

What it does to buying power

The gap between contract and qualifying rate cuts maximum borrowing by roughly 15-20% for most households. A family that could carry a $600,000 mortgage at their real rate might only qualify for around $500,000 once stress-tested. Annoying in the moment, protective over a decade of rate cycles, as borrowers who renewed out of 2021 lows learned firsthand.

Where it applies, and where it doesn't

• Applies: purchases, refinances and switches at banks and other federally regulated lenders, insured or not.
• Renewals with your existing lender: no re-test, one reason lenders hope you'll sign the renewal letter quietly.
• Since late 2024, straight switches at renewal (insured and, for like-for-like terms, uninsured) no longer require re-testing, you can shop at renewal again.
• Credit unions are provincially regulated; some apply more flexible qualifying policies.
• Alternative and private lenders use their own criteria entirely.

Working with it, not against it

Longer amortizations, paying down debts before applying, adding a co-borrower, counting all eligible income, or choosing a lender whose qualifying policy fits your file, there's usually more room than the first calculator suggested. Our affordability calculator builds the stress test in, and a quick call finds the room the calculator can't.

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