By the Josh Bernard Team, Sotheby's International Realty Canada
Buyers ask us about the mortgage stress test almost as often as they ask about listings. It is one of the first things that determines what a buyer can actually offer on a home, and in a market like Oakville, where detached properties often sell well above the national average, understanding it matters even more.
We are not mortgage brokers, and every buyer should confirm their own numbers with a licensed lender, but every serious buyer should understand how this rule works before touring homes.
Key Takeaways
- The stress test requires borrowers to qualify at the higher of 5.25% or their contract rate plus 2%, for both insured and uninsured mortgages.
- Since November 2024, borrowers who switch lenders at renewal without increasing their loan amount or amortization no longer need to be re-tested.
- Insured mortgages are now available on homes priced up to $1.5 million, up from the previous $1 million cap.
- Minimum down payment is 5% on the first $500,000 of the purchase price and 10% on the portion between $500,000 and $1.5 million, while homes priced at or above $1.5 million require at least 20% down and cannot be insured.
- All first-time buyers and all buyers of newly built homes can now access 30-year amortizations, not just those with insured mortgages.
- Lenders also weigh gross debt service and total debt service ratios, generally capped around 39% and 44%, alongside the stress test itself.
What the Mortgage Stress Test Actually Requires
The stress test uses the Minimum Qualifying Rate, requiring borrowers to prove they could afford payments at the higher of 5.25% or their contract rate plus two percentage points. A buyer offered 6% must qualify as though the rate were 8%, even though real payments are calculated at 6%. This applies whether the mortgage is insured, meaning the buyer put down less than 20%, or uninsured, meaning they put down 20% or more.
- Ask your lender to show you both your contract rate and the rate you are being qualified at.
- Remember that a larger down payment reduces your loan size but does not remove the stress test requirement.
- Use the stress test rate, not your contract rate, when estimating your realistic purchasing power.
Why the Stress Test Exists
The Office of the Superintendent of Financial Institutions, or OSFI, introduced the stress test to reduce the risk of borrowers taking on mortgages they could only afford at today's rates. The buffer above the contract rate is meant to protect borrowers and the financial system if rates rise or income changes before renewal. OSFI reviews the qualifying rate periodically rather than on a fixed schedule.
- Check with your lender periodically, since the qualifying rate can be updated by OSFI outside of a set calendar.
- Understand that the stress test buffer is designed around future rate risk, not your current monthly budget alone.
- Keep in mind that provincially regulated lenders, such as some credit unions, are not always bound by the same federal rule, so ask directly if you are working with one.
How the Stress Test Applies Differently at Renewal
For years, borrowers had to pass the stress test again every time they renewed or switched lenders, even without any change to their finances. Since November 21, 2024, a borrower moving to a new lender at renewal no longer needs to be re-tested, provided the loan amount and amortization stay the same. Refinancing an existing mortgage still triggers the stress test, since it involves borrowing additional funds or restructuring the loan.
- Confirm with your current and prospective lender whether your renewal qualifies as a straight switch or a refinance.
- Keep your loan amount and amortization unchanged if avoiding a renewal stress test is a priority.
- Ask your lender directly if you are unsure which category your situation falls into.
Down Payment Tiers and the $1.5 Million Insured Mortgage Cap
Down payment requirements in Canada are tiered rather than a single flat percentage. Buyers put down 5% on the first $500,000 of the purchase price and 10% on the portion between $500,000 and $1.5 million, and anyone putting down less than 20% requires mortgage insurance. As of December 2024, that insurance became available on homes priced up to $1.5 million, up from the previous $1 million limit. Homes priced at or above $1.5 million are not eligible for insurance and require a minimum 20% down payment, a threshold that matters in Oakville, where many detached homes in neighbourhoods like Morrison and Old Oakville sell above that mark.
- Calculate your down payment tier carefully if your purchase price is near the $500,000 or $1.5 million thresholds.
- Confirm whether your target price range requires mortgage insurance or a full 20% down payment.
- Factor the insured mortgage cap into your search if you are considering homes near $1.5 million in Oakville.
Other Numbers Lenders Look At: GDS, TDS, and Amortization
Beyond the stress test, lenders evaluate two debt service ratios: gross debt service, generally capped around 39%, comparing housing costs to income, and total debt service, generally capped around 44%, which adds other debt payments. Amortization length matters too, and recent changes expanded 30-year amortizations to all first-time buyers and any buyer purchasing a newly built home, not only those with insured mortgages.
- Ask your lender to calculate both your GDS and TDS ratios before you set a target price range.
- Consider whether a 30-year amortization applies to your situation if you are a first-time buyer or purchasing new construction.
- Review your other debt obligations, since they factor directly into your TDS ratio and borrowing power.
Frequently Asked Questions
Does the mortgage stress test apply when I renew my mortgage?
It depends. Since November 2024, a straight switch to a new lender at renewal, with the same loan amount and amortization, does not require re-testing, but a refinance still does.
What is the current mortgage qualifying rate in Canada?
Borrowers must qualify at the higher of 5.25% or their contract rate plus two percentage points, whichever is greater.
If I put down 20% or more, do I skip the stress test?
No. The stress test applies to both insured and uninsured mortgages, regardless of your down payment amount.
Can I get a 30-year amortization on my mortgage?
Possibly. Thirty-year amortizations are now available to all first-time home buyers and to any buyer purchasing a newly built home, not only those with insured mortgages.
Does the stress test work the same way with every lender?
The federal qualifying rate applies to federally regulated banks and lenders. Some provincially regulated lenders, including certain credit unions, may not follow the identical rule, so it is worth asking directly.
Considering a Purchase in Oakville?
Understanding the stress test is a key first step toward a realistic home search, and we are glad to connect you with trusted mortgage professionals as you look at homes in Oakville. Meet the Josh Bernard Team to start planning your next move.
