What is the mortgage stress test in Canada?

The qualifying rate rule

You must prove you can afford payments at the higher of:

• The Bank of Canada benchmark qualifying rate (currently 5.25%), OR
• Your contract rate + 2%

Example: A lender offers you 4.99%. You must qualify at 6.99% (4.99 + 2 = 6.99, which is higher than 5.25). On a $400,000 mortgage over 25 years, that means qualifying at ~$2,820/mo instead of your actual ~$2,335/mo payment.

Who the stress test applies to

Why it exists

Introduced by OSFI under Guideline B-20, the stress test is designed to ensure borrowers can absorb future rate increases. It became material in 2018 and tightened in June 2021.

Impact on borrowing power

The stress test reduces maximum borrowing by approximately 20%. A household earning $100,000 might qualify for ~$450,000 instead of ~$560,000.

Workarounds (legitimate)

• Larger down payment — getting to 20%+ doesn't remove the test but improves ratios
• Pay down other debts — every $200/mo eliminated unlocks ~$30K more borrowing
• Add a co-borrower — combines incomes for the GDS/TDS calculation
• Credit union — provincially regulated CUs may use different qualifying rules
• Longer amortization — 30-year amortization (uninsured only) lowers qualifying payment

Tip

Use LoanIQ's Affordability Calculator with the "stress test" toggle on to see your actual qualifying amount.