The Canadian mortgage stress test explained: 2025 rules

How the OSFI stress test works, the current qualifying rate, how much it reduces your borrowing power, and 6 proven strategies to pass it.

The OSFI mortgage stress test is the single most impactful rule in Canadian mortgage lending. Introduced in 2018, it forces every Canadian mortgage applicant to prove they can afford payments at a rate significantly higher than what they will actually pay. For many buyers it is the difference between qualifying for the home they want and being told they need to look at something cheaper. This guide explains exactly how it works, what the current qualifying rate is, and the most effective strategies to pass it.

What is the mortgage stress test?

The mortgage stress test is a rule set by the Office of the Superintendent of Financial Institutions (OSFI) that requires all mortgage applicants at federally regulated lenders to qualify at a higher interest rate than their actual contract rate. The purpose is to ensure borrowers can still afford their payments if rates rise after they take out the mortgage.

The stress test applies to:

• All new mortgage applications at federally regulated lenders (all major banks)
• Mortgage renewals when switching lenders
• Refinances at any lender
• Both insured mortgages (under 20% down) and uninsured mortgages (20% or more down)

The stress test does NOT apply to:

• Mortgage renewals with your existing lender (staying with the same lender at renewal)
• Private lender mortgages
• Most credit union mortgages (provincially regulated)

The current stress test qualifying rate (2025)

You must qualify at whichever rate is HIGHER:

• Option A: Your actual contract rate + 2.00%
• Option B: 5.25% (the OSFI minimum floor rate)

In practice this means:

• If your actual mortgage rate is 5.50%, you must qualify at 7.50% (5.50% + 2.00%)
• If your actual rate is 3.00%, you must qualify at 5.25% (the floor kicks in because 3.00% + 2.00% = 5.00% which is below the floor)
• If your actual rate is 4.00%, you must qualify at 6.00% (4.00% + 2.00% = 6.00% which is above the floor)

As of 2025 with rates in the 4.5%–5.5% range, most borrowers are qualifying at their contract rate plus 2% rather than the floor rate.

How much does the stress test reduce your borrowing power?

This is the most important number to understand. The stress test reduces your maximum mortgage amount by approximately 20% compared to qualifying at the actual contract rate.

Real example:

• Household income: $120,000
• No existing debts
• Actual mortgage rate: 5.50%
• Without stress test: maximum mortgage approximately $680,000
• With stress test at 7.50%: maximum mortgage approximately $545,000
• Reduction: $135,000 less borrowing power

This is why many buyers who were approved for a certain amount a few years ago find they qualify for significantly less today — the combination of higher rates and the stress test compounds the reduction in borrowing power. For a deeper look at how lenders calculate your maximum mortgage, see our mortgage affordability guide.

Who does the stress test affect most?

First-time buyers with high debt loads

Any existing debt — car loans, student loans, credit card minimums — reduces your maximum mortgage before the stress test even applies. The stress test then reduces it further. First-time buyers carrying significant debt are most severely impacted.

Single income applicants

With only one income to qualify against, the stress test leaves less room. A single income of $80,000 might qualify for a $380,000 mortgage at the stress test rate — nowhere near enough for an average Toronto or Vancouver home.

Buyers at the top of their budget

If you are trying to qualify for the maximum possible amount, the stress test is the ceiling that determines that maximum. Buyers trying to stretch to afford a specific home are most affected.

Self-employed borrowers

Self-employed income is already calculated differently (2-year average from NOA). The stress test then applies on top of a potentially lower qualifying income, creating a double squeeze.

Stress test by city — what income you need to qualify for an average home

Note: Required income calculated at stress test rate of 7.5%, 25-year amortization, 20% down, GDS ratio 39%.

6 strategies to pass the stress test

Strategy 1 — Add a co-borrower

Adding a spouse, partner, or family member to the mortgage application pools both incomes. This is the single most effective way to increase your qualifying amount. A household income of $160,000 qualifies for roughly double what a single $80,000 income qualifies for.

Strategy 2 — Pay down existing debts before applying

Every $500/month in existing debt payments reduces your maximum mortgage by approximately $80,000–$100,000. Paying off a car loan or student loan before applying can dramatically increase your qualifying amount. Even paying down credit card balances to reduce minimum payments helps.

Strategy 3 — Increase your down payment

A larger down payment reduces the mortgage amount you need to qualify for. If you are trying to buy a $700,000 home and can only qualify for $600,000 at the stress test rate, increasing your down payment from $100,000 to $200,000 solves the problem — you need a smaller mortgage.

Strategy 4 — Choose a longer amortization

If you have 20% or more down, extending to a 30-year amortization reduces your monthly payment at the stress test rate, which can push you over the qualification threshold. On a $600,000 mortgage the difference between 25 and 30 years at the stress test rate is approximately $280/month — enough to tip a borderline application into approval.

Strategy 5 — Apply through a credit union

Most credit unions in Canada are provincially regulated and not subject to OSFI's stress test rules. Many credit unions still apply their own version of a stress test but it may be less stringent. If you are borderline at a major bank, a credit union may be worth exploring.

Strategy 6 — Reduce your purchase price

The simplest strategy is to look at homes priced below your maximum qualification. Buying at 85–90% of your maximum approved amount gives you breathing room and a more comfortable debt load. Get a clear picture of your number first by completing a mortgage pre-approval.

Will the stress test be removed or reduced?

The stress test has been politically controversial since its introduction. Various groups including real estate boards, mortgage brokers, and some politicians have called for it to be reduced or eliminated, arguing it unfairly restricts buyers especially first-time buyers.

As of 2025 the stress test remains in place. OSFI has indicated it views the stress test as a critical tool for financial system stability and there are no current plans to eliminate it. The floor rate of 5.25% has remained unchanged since 2021.

Any changes to the stress test would be announced by OSFI and would apply to new applications going forward.

Check if you pass the stress test before you apply

Use Smart Mortgage Calculator to paste any Realtor.ca, Zolo, or MLS listing URL and instantly see whether you pass the stress test for that property based on your income. Know before you go to the bank.

Frequently asked questions

Stress test rules and qualifying rates change. This article reflects OSFI rules as of May 2025. Always confirm current qualifying rates with your lender or mortgage broker.