Mortgage Stress Test at Renewal — Options + Free Strategy Call Mortgage Stress Test at Renewal — Options + Free Strategy Call

Renewing within 90 days? Talk to a licensed renewal broker. Full rules below for when the Minimum Qualifying Rate still applies.

What the Stress Test Is, Exactly

The Canadian mortgage stress test is codified in OSFI Guideline B-20: Residential Mortgage Underwriting Practices and Procedures. It applies to all federally regulated financial institutions — the Big 6 banks, Equitable Bank, HSBC (now RBC), federally chartered trust companies, and monoline lenders that are federally regulated. CMHC applies a mirror test to insured mortgages under Guideline B-21.

The test requires the lender to qualify the borrower at the Minimum Qualifying Rate (MQR): the greater of the contract rate plus 2% or a 5.25% floor. Your actual payments are calculated at your contract rate — the MQR is strictly a qualification test to ensure you could still afford the mortgage if rates climbed.

The November 2024 Exemption: The Most Important Rule Change

On November 21, 2024, OSFI announced that federally regulated lenders are no longer required to apply the MQR to uninsured mortgage straight switches at renewal. This was a response to a long-standing asymmetry: insured mortgages (originally purchased with less than 20% down) had always been exempt at renewal, but uninsured borrowers (20%+ down) were trapped — they couldn't pass the stress test at a new lender, which gave their existing lender leverage to offer uncompetitive renewal rates.

OSFI's straight-switch exemption closed that gap. If you are moving your mortgage to a new federally regulated lender at renewal with no material change, the new lender qualifies you at the contract rate.

Read the full switching process in our switching lenders at renewal guide, and run the numbers on our stress test calculator.

When the Stress Test Still Applies at Renewal

The exemption is narrow. Any of the following trigger a full MQR qualification:

• Refinancing: Taking out equity, consolidating debt into the mortgage, or increasing the balance beyond the small fee buffer.
• Extending amortization: Stretching the amortization to lower payments is generally considered a refinance. See our guide on lowering payments at renewal.
• Adding a co-borrower: Adding a spouse, parent, or other co-signer to title at renewal triggers re-qualification.
• Removing a borrower: Common in divorce or separation scenarios — the remaining borrower is qualifying for the mortgage alone and must pass the MQR on their own income.
• Adding a HELOC or readvanceable product: Even if the mortgage portion is unchanged, adding a line of credit usually requires re-qualification.
• Changing from uninsured to insured (or vice versa): Rare but possible with certain portfolio insurance structures.

Staying with Your Current Lender: MQR Typically Not Re-Applied

Many borrowers don't realize this: if you simply sign the renewal offer from your existing federally regulated lender, the prescribed MQR is typically not re-applied. OSFI has never required B-20 re-qualification for a straight renewal with the same lender — the bank has already confirmed you qualified for the original mortgage. That is not a blanket “no requalification”: the lender can still set its own conditions.

This sounds borrower-friendly, but it's a double-edged sword. Because your current lender knows you may not be able to easily move, they have historically offered renewal rates well above their best available. The 2024 exemption now eliminates that leverage — you can shop with any federally regulated lender and still qualify at contract rate.

GDS and TDS Ratio Limits

Even when the MQR is waived, lenders still check your debt service ratios at contract rate. These are the second half of the qualification test.

Provincial Credit Unions: A Different Rulebook

Provincial credit unions — Meridian (Ontario), Vancity (BC), Servus (Alberta), DUCA (Ontario), and many others — are regulated by provincial authorities (FSRA, BCFSA, etc.) rather than OSFI. B-20 does not technically bind them. In practice, most apply a similar stress test voluntarily to manage credit risk, but many will qualify at the contract rate in specific circumstances, giving borrowers additional purchasing power.

A broker who works with the credit union channel can often surface a solution if you can't pass the MQR at a federally regulated lender. See our overview of Canadian lender types for how the channels compare.

Loan-to-Income Limits Are in Force

On November 21, 2024, OSFI implemented portfolio-level loan-to-income (LTI) limits alongside the prescribed-MQR exemption for uninsured straight switches. An LTI framework caps the share of a lender's new originations that can go to highly leveraged borrowers (typically loans above 4.5× gross annual income), similar to the UK approach.

LTI limits are in force — they are not still under consultation. The prescribed MQR still applies to new originations, refinances, and other non-exempt transactions. Official: OSFI November 21, 2024 letter. Our rate forecast page tracks related policy developments.

Practical Strategies If You're Worried About Passing

• Do a straight switch instead of refinancing. If your goal is a better rate only — not new money — the exemption applies and you simply move to the better offer.
• Pay down consumer debt before applying. Lowering credit card and car loan balances directly improves TDS and often adds tens of thousands to qualifying capacity.
• Delay extending amortization. If you want lower payments, see whether your current lender will extend it on simple renewal — otherwise a refinance is required.
• Work with a broker. A broker will run the MQR math across 30+ lenders, including credit unions, before you commit to any single application. Many renewal mistakes stem from not knowing which lender to apply to.

Frequently Asked Questions

Sources: OSFI Guideline B-20 (Residential Mortgage Underwriting); OSFI November 21, 2024 notice exempting uninsured straight-switch renewals from the MQR; CMHC Guideline B-21; FCAC mortgage renewal guidance. This page is educational and does not constitute financial advice. Always verify current rules with a licensed mortgage professional.