Accounts & Tax · Home buying
The mortgage stress test in Canada
Before a bank lends you a dollar, it has to prove you could still pay if rates jumped. The mortgage stress test qualifies you at the greater of your rate + 2% or 5.25% — not the rate you actually pay, but the one that decides how much house you can buy. Here is exactly how it works in 2026, and how to plan around it.
The short answer
- The ruleQualify at rate + 2%, or 5.25% — whichever is higher
- You payYour real contract rate — the test rate is hypothetical
- Applies toBank mortgages — insured and uninsured; credit unions exempt
- Effect~15–20% less borrowing power than the contract rate alone
What the stress test actually is
A federal underwriting rule (OSFI Guideline B-20) that makes banks approve you at a higher rate than you'll actually pay, to confirm you have a cushion.The "stress test" is a federal rule under OSFI Guideline B-20. It forces banks to approve your mortgage as if your interest rate were higher than the rate you negotiated — so the lender can be confident you could still make your payments if rates climbed or your income dipped before your next renewal. It applies to new mortgages at federally regulated lenders, whether your down payment is under 20% (insured) or 20% and over (uninsured).
Crucially, the test does not raise your payment. You still pay your real, lower contract rate. All it changes is the maximum amount you’re allowed to borrow.
How the qualifying rate is calculated
You qualify at the greater of your contract rate plus two percent, or the 5.25% federal floor — whichever is higher.The qualifying rate — sometimes called the Minimum Qualifying Rate, or MQR — follows one simple rule:
Qualifying rate = the greater of (your contract rate + 2%) or 5.25%
The 5.25% floor remains in effect in 2026. In today’s rate environment, most borrowers land on the "contract rate + 2%" side. Here’s how it plays out at a few different offered rates:
| Your contract rate | Rate + 2% | You qualify at | Which applies |
|---|---|---|---|
| 2.50% | 4.50% | 5.25% | Floor wins |
| 4.00% | 6.00% | 6.00% | Contract + 2% wins |
| 4.75% | 6.75% | 6.75% | Contract + 2% wins |
| 5.50% | 7.50% | 7.50% | Contract + 2% wins |
OSFI reviews the 5.25% floor and the 2% buffer quarterly, so confirm the current figures at osfi-bsif.gc.ca before you apply.
GDS and TDS: the ratios that set your limit
Lenders cap your housing costs at ~39% of gross income (GDS) and your total debt payments at ~44% (TDS) — measured using the qualifying rate.Once the qualifying rate is set, the lender uses it to find the biggest mortgage whose payment still fits inside two affordability ratios:
| Ratio | What it includes | Typical max |
|---|---|---|
| GDS — Gross Debt Service | Mortgage principal + interest, property tax, heat (and 50% of condo fees) | ≤ 39% |
| TDS — Total Debt Service | Everything in GDS, plus all other debt payments — car loans, lines of credit, cards | ≤ 44% |
Both ratios are measured against the qualifying rate, not your contract rate — which is exactly why the test shrinks the maximum you can borrow.
How much it shrinks your borrowing power
Because the ratios use the higher qualifying rate, the maximum mortgage is typically 15–20% smaller than the contract rate alone would allow.Because your ratios are tested at the higher qualifying rate, the maximum mortgage you can carry comes in noticeably smaller — commonly 15–20% lower than the contract rate alone would suggest. That gap is the whole point: it builds an affordability cushion in before you sign.
A credit union may qualify you for more because it isn’t bound by the federal test — but a bigger mortgage is bigger risk, not extra safety. Passing the test is a floor for prudent borrowing, not a target to beat.
Who it applies to — and the renewal exemption
Banks must apply it to insured and uninsured mortgages. Credit unions are exempt, and since Nov 2024 a same-balance switch at renewal no longer triggers it.The test applies to new mortgages at federally regulated lenders — insured and uninsured alike. Credit unions, being provincially regulated, are not bound by it. And at renewal the rules eased: renewing with your existing lender never triggered the test, and since November 2024, a "straight switch" to a new lender — same balance, same remaining amortization — is exempt too. Refinance, raise the balance, or extend the amortization, and the test comes back.
Insured vs uninsured, and the 2024 reforms
Since Dec 15, 2024 the insured-mortgage price cap is $1.5M and 30-year amortizations are allowed for first-time buyers and new builds.An insured mortgage (less than 20% down) carries default insurance; an uninsured one (20%+ down) does not. Both face the stress test at a bank. Two reforms that took effect December 15, 2024 remain in force in 2026 and matter for buyers:
- The insured-mortgage price cap rose from $1 million to $1.5 million, so more homes qualify for a down payment under 20%.
- 30-year amortizations are now allowed on insured mortgages for first-time buyers or buyers of newly built homes — which lowers the qualifying payment and can ease the test.
See what you actually qualify for
Plug in your income, rate, and down payment to estimate your real maximum — tested, not wishful.
What to do — and what to avoid
A short checklist for clearing the stress test without over-borrowing.Passing the test is easier — and safer — when you plan around it. Keep these in mind:
Do this
- Qualify yourself at the higher rate before you shop — know your real maximum, not the contract-rate dream number.
- Pay down car loans, lines of credit, and card balances first — they hit your TDS ratio dollar-for-dollar.
- Ask whether a longer amortization (up to 30 years if you qualify) lowers the qualifying payment enough to help.
- Compare a credit union — provincially regulated, so it sets its own test and may qualify you for a bit more.
- Keep a cash buffer: passing the test proves you could handle a higher rate, but a real renewal shock still stings.
Avoid this
- Don’t assume the stress test means you’ll pay the higher rate — you pay your actual, lower contract rate.
- Don’t max out your approval — borrowing the full qualifying amount leaves no room for rate hikes or surprises.
- Don’t forget property tax and heat — they count in your GDS ratio even though they aren’t part of the mortgage payment.
- Don’t expect a straight switch at renewal to re-trigger the test — since Nov 2024 a same-balance switch is exempt.
- Don’t treat a credit union’s easier approval as free money — a bigger mortgage is still a bigger risk.
A worked example: the Nguyens buy a home
A hypothetical household shows how qualifying at the higher rate trims the maximum mortgage. Figures are illustrative.Numbers make it concrete. The Nguyens earn $120,000 between them and are offered a 4.75% five-year fixed rate over a 25-year amortization, with roughly $5,000/year in property tax and $1,200/year in heat.
What they’d pay: at the contract 4.75%, the monthly payment on a $430,000 mortgage is about $2,440 — comfortably inside their budget.
What the bank tests: the stress test qualifies them at 6.75% (4.75% + 2%), where that same $430,000 would cost about $2,950 a month. To keep their GDS and TDS ratios in line at that rate, the bank caps them around $430,000 — versus roughly $525,000 if it had used the contract rate alone.
The result: the test trims about $95,000 — close to 18% — off their maximum. They pay the lower rate, but they shop for a home priced to the tested number.
That cushion is the test doing its job: if rates are higher when the Nguyens renew in five years, the payment they’ve already proven they can carry is much closer to reality.
Frequently asked questions
Quick answers on the qualifying rate, who must pass, renewals and switches, GDS/TDS, and whether you can avoid the test.What is the mortgage stress test in Canada?
The mortgage stress test is a federal rule that requires banks to approve you at a higher interest rate than the one you’ll actually pay. Set under OSFI Guideline B-20, it makes lenders confirm you could still afford your payments if rates rose or your income dropped. It applies to new mortgages at federally regulated lenders — both insured (less than 20% down) and uninsured (20%+ down). It does not change your contract rate; it only changes how much you’re allowed to borrow.
What is the qualifying rate, and how is it calculated?
You must qualify at the greater of your contract rate + 2%, or 5.25% (the federal minimum floor, still in effect in 2026). So if your offered rate is 4.75%, the bank tests you at 6.75% (4.75% + 2%). If your rate were only 2.5%, you’d be tested at the 5.25% floor instead — whichever is higher. OSFI reviews this floor quarterly, so confirm the current number before you apply.
Does the stress test mean I have to pay the higher rate?
No — this is the most common misconception. The qualifying rate is only used to test your affordability. You still pay your actual, lower contract rate on the mortgage. The higher rate exists purely so the lender can be confident you have a cushion if rates climb by the time you renew.
Who has to pass the mortgage stress test?
Anyone getting a new mortgage from a federally regulated lender — the big banks and most national lenders — whether the mortgage is insured or uninsured. Credit unions are provincially regulated and are not bound by OSFI’s test, though most apply a similar internal check voluntarily. That difference is why a credit union can sometimes approve you for slightly more than a bank.
Do I have to pass the stress test again when I renew?
Generally no. Renewing with your existing lender has never triggered the test. And since November 2024, OSFI no longer prescribes the stress test for a "straight switch" to a new lender at renewal — provided your loan amount and remaining amortization don’t increase. If you refinance, increase the balance, or extend the amortization, the test applies again.
What are the GDS and TDS ratios?
They’re the affordability limits the lender applies using the qualifying rate. GDS (Gross Debt Service) — your housing costs (mortgage principal + interest, property tax, heat, plus half of any condo fees) — must stay at or below about 39% of gross household income. TDS (Total Debt Service) — housing costs plus all other debt payments — must stay at or below about 44%. The lender finds the biggest mortgage whose payment fits inside both ratios.
How much does the stress test reduce how much I can borrow?
Often by roughly 15–20%, depending on rates. Because your ratios are measured against the higher qualifying rate, the maximum mortgage shrinks. For a household earning $120,000 at a 4.75% contract rate, qualifying at 6.75% instead can cut the maximum mortgage from about $525,000 to about $430,000 — roughly $95,000 less buying power. Use a mortgage calculator to see the gap on your own numbers.
Can I avoid the mortgage stress test?
Only by borrowing from a lender it doesn’t bind — primarily a credit union, which is provincially regulated. Some private and alternative lenders also fall outside it. But "passing" by borrowing more isn’t a win on its own: the test exists to keep your payment affordable if rates rise, so sidestepping it means taking on more risk, not removing it. Borrow what you can comfortably carry, not the maximum someone will approve.
This guide is for educational purposes only and is not financial, mortgage, or lending advice. The worked example is hypothetical and figures are illustrative. Qualifying-rate rules, the 5.25% floor, insured-mortgage caps, and amortization rules are reviewed regularly and can change — always confirm current figures at osfi-bsif.gc.ca and canada.ca, and with a licensed mortgage professional, before acting. See our mortgage calculator and FHSA guide for related reading.