Quick answer
For most newly underwritten uninsured mortgages at federally regulated lenders, the qualifying rate is the higher of 5.25% or your contract rate plus 2 percentage points. A 4.79% contract rate therefore gives a 6.79% qualifying rate. This is a qualification test, not your actual interest rate.
You find a rate of 4.79%, work out the payment, and it fits comfortably. Then the lender tells you that you qualify for considerably less than you expected. The reason is the stress test, and it is doing something quite specific: approving you for a payment you are not going to make.
How the qualifying rate works
Lenders must assess you against a minimum qualifying rate rather than your contract rate. The long-standing formulation is the greater of your contract rate plus two percentage points, or a floor of 5.25%. At a contract rate of 4.79%, the qualifying rate is 6.79% — the contract rate plus two, since that exceeds the floor.
The test applies to both insured and uninsured mortgages at federally regulated lenders, though the two are governed by different rule-makers: the Office of the Superintendent of Financial Institutions sets the uninsured requirement, and the Department of Finance the insured one. Because the floor has been revisited before, confirm the current figure with your lender rather than assuming.
What it costs you in purchasing power
Take a $520,000 mortgage over 25 years. At 4.79% with Canadian semi-annual compounding the payment is about $2,962.48 a month. At the 6.79% qualifying rate it is roughly $3,574.99 — about $612.51 a month higher.
Your income has to support that larger figure within the lender’s debt service ratios, even though you will pay the smaller one. The difference depends on the rate, amortization, income and other debts; it is not a fixed reduction that applies to every borrower.
Try it freeCanadian Mortgage CalculatorSemi-annual compounding, CMHC insurance and full amortization.Running the test yourself
To compare payments in our Canadian mortgage calculator: enter your contract rate plus two percentage points, or 5.25% if that is higher, and read off the payment. Use the same loan amount and amortization for both runs. The difference shows the payment buffer, but loan approval also considers other debts and housing costs.
Advertisement
It is worth doing before you shop, not after. Knowing the qualifying payment tells you your realistic price ceiling, and it saves the experience of falling for a property you cannot finance.
Make sure your calculator uses Canadian semi-annual compounding rather than the monthly compounding standard in the United States. On a $520,000 mortgage at 4.79% the difference is only about fifteen dollars a month, but a US-based calculator will consistently overstate a Canadian payment.
The part that is genuinely useful
The stress test is easy to resent. It is also the reason Canadian mortgage renewals have been comparatively uneventful through a period of sharply rising rates. Borrowers approved at 2% in 2021 were assessed at 5.25%, so when they renewed at 5% the payment was inside what the lender had already established they could handle.
A Canadian mortgage term is typically five years against a 25-year amortisation, which means you renew at unknown rates four or five times over the life of the loan. Qualifying at today’s rate would export all of that risk onto future you.
Where the test does not reach
Credit unions regulated provincially rather than federally are not bound by the same requirement, and some private lenders apply their own standards. OSFI does not prescribe its minimum qualifying rate for an uninsured straight switch between federally regulated lenders at renewal when neither the loan amount nor the remaining amortization increases. The new lender still assesses the application.
None of this makes borrowing beyond the test a good idea. The qualifying rate is a reasonable estimate of what you might actually be paying in five years, and treating it as your real budget rather than an obstacle is the more useful posture. If the qualifying payment looks unaffordable, that is information about the purchase, not about the regulation.
Recommended tool
Compare mortgage rates
See live rates from lenders and brokers in your area before you renew or make an offer. A quarter point on a 25-year mortgage is real money.
Compare current ratesRecommendation coming soon.
Frequently asked questions
- What rate is the stress test at?
- The greater of your contract rate plus two percentage points, or a floor of 5.25%. At a 4.79% contract rate you are assessed at 6.79%. Confirm the current floor with your lender.
- Does the stress test apply if I have 20% down?
- Yes. It applies to both insured and uninsured mortgages at federally regulated lenders, under separate rules for each.
- How much does it reduce what I can borrow?
- There is no universal percentage. Compare contract-rate and qualifying-rate payments with the same principal and amortization; your income, other debts and lender criteria also matter.
- Do I have to requalify when I renew?
- For an uninsured straight switch at renewal between federally regulated lenders, OSFI does not prescribe its minimum qualifying rate if neither the loan amount nor remaining amortization increases. Other underwriting checks still apply; confirm eligibility with the lender.
General information only — not tax, legal, accounting or financial advice. Rates change and individual circumstances vary. Confirm figures with the CRA, the IRS, your state or provincial authority, or a licensed professional before acting on them.
Calculators for this
Sources & methodology
FTT Finance-To-Thrive is an independent publisher of free finance calculators. The links below explain the rules and assumptions relevant to this page. Calculators use simplified models; for example, state and provincial income-tax estimates may omit brackets, credits, or local rules. See the formula and limitations on each calculator. We are not accountants, tax preparers, mortgage brokers or financial advisors, and nothing on this page is advice. Rates change and individual circumstances vary — confirm figures against the primary source before you file, sign or commit money. Read more about how we work and our funding & disclosure.
Page content last updated 2026-09-13
Primary sources
- OSFI — Minimum qualifying rate for uninsured mortgages
- CMHC — Mortgage loan insurance
- FCAC — Mortgages
Source links are provided separately from the original content dates. They do not imply that an authority endorses this site or that every figure has been independently reviewed.
Advertisement