Mortgage Stress Test in Canada Explained (2026 Rate and Examples)
The mortgage stress test uses your contract rate plus 2% or 5.25%, whichever is higher. At 4.49% that means 6.49%. What it does to your maximum mortgage.
Every federally regulated lender must qualify you at the greater of your contract rate plus 2 percentage points or 5.25%. With five-year fixed rates around 4.3% to 5%, the contract-plus-2 leg wins, so a buyer offered 4.49% is tested at 6.49%. On a $600,000 home with 10% down that pushes the income needed from about $110,000 to about $132,000. The test does not apply when you switch lenders at renewal on an uninsured mortgage.
Figures come from the CostToClose stress test calculator.
What the test is
Introduced for insured mortgages in 2016 and extended to uninsured ones by OSFI's Guideline B-20 in 2018, the stress test is a qualifying rule, not a rate you pay. The lender calculates your debt-service ratios as if your mortgage payment were at the higher "qualifying rate." If the ratios still fit (gross debt service, or housing costs, at or below 39% of income and total debt service at or below 44% for insured mortgages, similar or slightly tighter for uninsured), you qualify. Your actual payment uses your actual rate.
The floor of 5.25% was set in June 2021. It only bites when contract rates are below 3.25%, which last happened in early 2022.
The qualifying rate at today's contract rates
| Contract rate | Qualifying rate |
|---|---|
| 4.29% | 6.29% |
| 4.49% | 6.49% |
| 4.99% | 6.99% |
| 3.00% (hypothetical) | 5.25% (floor applies) |
Source: OSFI Guideline B-20 (uninsured); Department of Finance Canada (insured). Checked 14 September 2026.
What it does to your borrowing power
The test does not change your payment; it changes how much a lender will let you borrow.
| Metric | Qualified at 4.49% (no test) | Qualified at 6.49% |
|---|---|---|
| Income | $132,000 | $132,000 |
| Maximum mortgage (GDS 39%, $450/mo tax, $100/mo heat) | ≈ $676,000 | ≈ $559,000 |
| Reduction | ≈ 17% |
Rule of thumb from the calculator: a two-point stress test cuts maximum borrowing by 15% to 18% at current rates.
Worked example from the calculator
Couple earning $132,000, buying a $600,000 house with 10% down (mortgage $556,740 including the CMHC premium), five-year fixed at 4.49%, property tax $450 a month, heat $100:
| Item | Amount |
|---|---|
| Actual monthly payment at 4.49% | $3,078 |
| Payment used for qualifying, at 6.49% | $3,726 |
| Housing costs for GDS (payment + tax + heat) | $4,276 |
| Income needed at 39% GDS | $131,563 |
They qualify with almost nothing to spare. At 4.49% without the test the same income would carry a mortgage roughly $117,000 larger. Reproduce this.
When the test does not apply
- Switching lenders at renewal on an uninsured mortgage. Since November 2024, OSFI no longer requires a stress test for straight switches (same amount, same amortization). Insured switches were already exempt.
- Renewing with your current lender. Never tested.
- Credit unions and private lenders. Provincially regulated, so B-20 does not bind them; most credit unions apply a similar test anyway, and private lenders charge for the difference.
What changes the number
- A lower contract rate. Every 0.25% lower on the contract rate is 0.25% lower on the qualifying rate, until you reach 3.25%, where the floor takes over.
- A longer amortization. A 30-year amortization lowers the qualifying payment by about 9% and is available on insured mortgages to first-time buyers and buyers of new construction.
- Paying down other debt. Car loans and credit cards count in total debt service at the stress rate for the mortgage, so clearing them raises the mortgage you qualify for.
- Variable-rate mortgages are tested at the same rule, using the variable contract rate plus 2%.
Who this covers
This applies to new mortgage applications and insured switches at federally regulated lenders, banks and most mortgage-finance companies. Provincially regulated credit unions aren't bound by OSFI's rule, though most apply a similar test on their own; private lenders don't apply it but price the extra risk into their rate instead.
What this doesn't include
- Total debt service (TDS) in detail. The examples above focus on GDS (housing costs alone); many lenders apply a TDS limit that's tighter than the 44% regulatory ceiling, which this page doesn't model.
- Lender-specific underwriting overlays. OSFI sets the minimum qualifying rate; individual lenders can apply stricter internal rules on top of it.
- How self-employed or variable income gets stress-tested. Lenders often average two years of income and require more documentation, which changes the qualifying income figure this page doesn't calculate.
- A co-signer or guarantor's effect on the calculation, which changes the combined income and debt used to qualify.
- A specific credit union's or private lender's own internal test, since B-20 only governs federally regulated lenders.
Questions worth asking a professional
- Confirm with your lender which exact qualifying rate applies to your file. It can differ slightly by lender and product even under the same OSFI rule.
- Ask whether your lender's internal TDS limit is tighter than the 44% regulatory ceiling.
- If you're self-employed, ask how your income will be averaged and what extra documentation the stress test requires.
- If you're switching lenders at renewal, get written confirmation that your specific switch is exempt before assuming it is.
Frequently asked questions
What is the mortgage stress test rate in 2026?
The greater of your contract rate plus 2% or 5.25%. With typical fixed rates of 4.3% to 5%, that works out to 6.3% to 7%.
Does the stress test apply when I renew?
Not if you renew with your current lender, and since November 2024 not for a straight switch to another lender on an uninsured mortgage either.
How much does the stress test reduce what I can borrow?
About 15% to 18% at current rates. A buyer who could carry $676,000 at 4.49% qualifies for roughly $559,000 when tested at 6.49%.
Is the stress test the same for insured and uninsured mortgages?
The qualifying rate is the same. Debt-ratio limits differ slightly: 39% GDS and 44% TDS for insured, with lenders applying their own, often tighter, limits on uninsured.
Will the stress test be removed?
There is no announced plan to remove it. OSFI reviews B-20 annually; the most recent change was the November 2024 exemption for uninsured switches.
Sources
- Office of the Superintendent of Financial Institutions, Guideline B-20 Residential Mortgage Underwriting Practices and Procedures — checked 14 Sept 2026
- OSFI, statement on mortgage switches (November 2024) — checked 14 Sept 2026
- Department of Finance Canada, qualifying rate for insured mortgages — checked 14 Sept 2026
- Bank of Canada, conventional five-year mortgage rate series — checked 14 Sept 2026
This is general information for Canadian home buyers and sellers, checked against the sources listed above on the date shown. It does not constitute legal, tax, or mortgage advice. Because rules and rates change, confirm current figures with your lawyer or notary, your lender, or the government office that administers the tax before you rely on them.