Everything you need to know about qualifying at the higher of contract rate + 2% or 5.25% — and how to pass it.
Canada's mortgage stress test is a federal rule requiring lenders to verify that borrowers can still afford their mortgage if interest rates rise. Introduced by the Office of the Superintendent of Financial Institutions (OSFI) under Guideline B-20, the stress test ensures borrowers aren't stretched to their limit at today's rates and have a buffer for higher rates ahead.
Since June 2021, the minimum qualifying rate (MQR) has been set at the greater of the borrower's contract rate plus 2 percentage points, or 5.25% — whichever is higher. In 2026, this rule remains in place and applies to virtually all mortgages from banks, credit unions (in most provinces), and other federally regulated lenders.
When you apply for a mortgage, the lender does not just check if you can afford the monthly payment at your negotiated rate. They apply the stress test qualifying rate to calculate your maximum mortgage amount. Here is the formula:
| Contract Rate | Stress Test Rate |
|---|---|
| 4.5% (example) | 6.5% (4.5% + 2%) |
| 3.0% | 5.25% (floor applies) |
| 5.5% | 7.5% (5.5% + 2%) |
| 3.2% | 5.25% (floor applies) |
| 6.0% | 8.0% (6.0% + 2%) |
The lender then calculates your Gross Debt Service (GDS) and Total Debt Service (TDS) ratios using the qualifying rate. Maximum GDS is 39% and TDS is 44% for most borrowers.
See how much you qualify for under the stress test rules.
The stress test uses two debt service ratios to determine how much you can borrow:
GDS measures housing costs as a percentage of gross income. It includes: mortgage payment (at qualifying rate) + property taxes + heating costs + 50% of condo fees. This total cannot exceed 39% of gross household income.
TDS adds all other monthly debt payments (car loans, student loans, credit cards minimum payments, lines of credit) to the GDS figure. The combined total cannot exceed 44% of gross household income.
| Component | Included In |
|---|---|
| Mortgage payment (stress test rate) | GDS + TDS |
| Property taxes | GDS + TDS |
| Heating (estimated $150/mo) | GDS + TDS |
| 50% of condo fees | GDS + TDS |
| Car loans, student debt, etc. | TDS only |
The stress test significantly reduces the mortgage amount you qualify for compared to qualifying at the contract rate. Here is a real-world comparison with a $150,000 income household:
| Qualifying Rate | Max Mortgage (25-yr amort) |
|---|---|
| 5.2% (contract rate) | ~$810,000 |
| 7.2% (stress test rate) | ~$660,000 |
| Difference | ~$150,000 less |
As a rough rule, the stress test reduces maximum purchasing power by approximately 15–20% compared to qualifying at the contract rate alone.
A larger down payment reduces the mortgage principal. If you can put 20% down, you also avoid CMHC insurance premiums, further reducing the loan amount.
Paying off car loans, credit card balances, or student loans before applying lowers your TDS ratio and can meaningfully increase the mortgage amount you qualify for.
Adding a spouse, partner, or family member to the application pools gross income, which increases the GDS and TDS ceilings substantially.
Stretching amortization from 25 to 30 years lowers the monthly payment at the qualifying rate, which may help you pass the GDS threshold. Note: 30-year amortizations are only available on uninsured mortgages (20%+ down).
If current 5-year fixed rates are high, consider a shorter 1- or 2-year term. The contract rate may be lower, but the stress test still adds 2% on top — so the benefit is limited unless rates are meaningfully lower for short terms.
Provincially regulated credit unions in BC, Alberta, and Ontario set their own stress test rules. Some private lenders (B-lenders, MICs) do not apply OSFI's stress test, though rates are higher. Use a mortgage broker to compare all options.
Credit unions are provincially regulated and not required to follow OSFI guidelines, creating some regional flexibility:
Open a KOHO account and earn a $100 bonus — then use those savings to boost your down payment and pass the stress test more easily.
Claim Your $100 KOHO BonusIf you renew with your existing lender and they choose to waive the stress test, they may do so at their discretion. However, if you switch lenders at renewal, you must pass the stress test at the new lender. Since late 2023, OSFI clarified that the stress test applies at renewal when switching lenders.
Yes. The stress test applies to both insured (under 20% down) and uninsured (20%+ down) mortgages from federally regulated lenders since 2018.
Private lenders and MICs are not subject to OSFI's B-20 guidelines. However, private mortgage rates are significantly higher (often 8–15%) and terms are short (1–2 years). This is generally a last resort, not a long-term strategy.
OSFI reviews the stress test periodically. As of early 2026, the minimum qualifying rate floor of 5.25% remains in place. OSFI could lower the floor if long-term mortgage rates decline significantly, but no changes have been announced.
Yes. HELOC applications are also subject to the stress test at federally regulated lenders. This affects your borrowing limit for home equity financing.
Use Bremo's free tools to plan your mortgage purchase:
Understanding the stress test is step one. Work with a licensed mortgage broker to structure your application in a way that maximizes your qualifying amount while keeping payments manageable long-term.