Mortgage Stress Test in 2027: How Qualifying Works

By Jatin Dua · Broker of Record, RE/MAX Quantum Realty · Updated 2 November 2026 · 11 min read — The 2027 stress test explained with today’s rates: the qualifying rate, GDS and TDS limits, GTA income examples and when the test does not apply.

This guide is for anyone in Toronto or the GTA who plans to buy, refinance or switch lenders in 2027 and wants to know exactly how the mortgage stress test will judge them. You will get the qualifying rate at today’s real rates, the GDS and TDS maths a lender actually runs, worked GTA examples and the cases where the test does not apply, as of November 2026.

What is the mortgage stress test in 2027?

The stress test is a check that you could still make your payments if your interest rate were higher than the one in your contract. Lenders do not ask whether you can afford the payment at your real rate. They ask whether you can afford it at a higher “qualifying rate”.

The rule is simple: you qualify at the greater of 5.25% or your contract rate plus 2 percentage points. OSFI, the federal regulator of banks, sets this minimum qualifying rate (MQR) for uninsured mortgages, meaning 20% or more down. CMHC applies the same formula to insured mortgages, meaning less than 20% down, and says it covers fixed, adjustable and variable rates on every term.

So whether you put down 5% or 50%, the same test applies. A bigger down payment shrinks the loan being tested. It does not change the rate it is tested at. If you want the background on how the rule started, my 2026 stress test guide covers it. This page focuses on what it means for a 2027 purchase.

What is the stress test rate right now?

Because most contract rates are now above 3.25%, the “contract rate plus 2” side is the one that applies to almost everyone. The 5.25% floor only matters if you somehow get a rate below 3.25%.

Source: OSFI minimum qualifying rate; CMHC GDS/TDS guidance; rates from Ratehub (10 November 2026) and Bank of Canada posted rates (week of 4 November 2026). Rates are examples, not quotes.

The rate picture moved in the last few weeks. The Bank of Canada raised its policy rate to 2.50% on 28 October 2026, and the big banks raised prime to 4.70%. Variable rates rose with it, and so did the qualifying rate on every new variable mortgage. Fixed rates follow bond yields instead, which climbed through the fall. Every 0.25 points added to your contract rate is 0.25 points added to the rate you are tested at.

How does the stress test decide how much you can borrow?

The qualifying rate feeds into two debt limits. CMHC caps both, and most lenders use similar limits for uninsured loans:

• Gross debt service (GDS) ratio, maximum 39%. Your mortgage payment at the qualifying rate, plus property tax, plus heating, plus half of any condo fee, divided by your gross monthly income.
• Total debt service (TDS) ratio, maximum 44%. Everything in GDS plus your other debt payments: car loans, student loans, support payments, lines of credit and credit cards.

Two details trip people up. First, CMHC tells lenders to count at least 3% of the balance on credit cards and unsecured lines of credit as a monthly payment, even if you only pay the minimum. A $5,000 card balance counts as $150 a month. Second, the mortgage payment is calculated on the loan including the CMHC premium, not just the amount you borrow.

A worked example on a $120,000 household income

Say a couple earns $120,000 a year, or $10,000 a month. They expect property tax and heating of $500 a month on the home they want, and they have no other debts. At 39%, they can spend $3,900 a month on housing costs. After tax and heat, that leaves $3,400 for the mortgage payment at the qualifying rate.

Source: my calculations using the CMHC GDS/TDS limits and OSFI/CMHC qualifying rule; 4.44% is the lowest insured 5-year fixed rate on Ratehub, 10 November 2026. Semi-annual compounding. Illustration only.

The stress test cuts this couple’s borrowing power by about $108,000, or 17%, at 25 years. Add a car loan and a modest card balance and the TDS limit takes another $37,000 off. That is why I ask every buyer about their car payment before we look at a single listing.

How much income do you need to pass the stress test in the GTA?

Here are two real price points, using median sold prices from TRREB MLS data via REALM for January to October 2026. Both assume the minimum down payment, a 4.44% contract rate tested at 6.44%, and my own estimates for tax, heat and condo fees, which you should replace with real figures for any home you look at.

Source: prices from TRREB MLS data via REALM, January–October 2026; CMHC premiums (4.00%, or 4.20% with a 30-year amortization); my calculations. Income needed assumes no other debts.

Notice the gap between the payment you would actually make and the payment you are tested at: more than $1,100 a month on the Brampton example. You will not pay the tested amount. You just have to show you could. For more income levels, see my guide on how much house a $100,000 salary buys in the GTA.

Does the stress test apply at renewal, refinance or with a HELOC?

It depends on what you are doing:

• Renewing with your current lender: no new stress test.
• Switching an uninsured mortgage to a new lender at renewal: since 21 November 2024, OSFI does not expect federally regulated lenders to apply the MQR to a “straight switch”, meaning no increase to the loan amount or the amortization.
• Switching an insured mortgage at renewal: the federal government announced in September 2024 that insured borrowers can switch lenders at renewal without another stress test.
• Refinancing or taking out a home equity line of credit: yes. FCAC says existing owners must pass the stress test to refinance or add a HELOC.

If you borrow more or stretch the amortization when you switch, it is no longer a straight switch and you are tested again. My piece on switching lenders at renewal goes through the edge cases.

Does the stress test apply at credit unions and private lenders?

For insured mortgages, yes, wherever you borrow. The qualifying rate is part of the mortgage insurance rules, so any lender getting CMHC or private default insurance must use it.

For uninsured mortgages, OSFI’s rule only binds federally regulated lenders such as banks. FCAC notes that lenders that are not federally regulated, such as provincially regulated credit unions, may also require a stress test. Ask each lender which rate it tests at before you apply. Private lenders set their own rules, but they usually charge far higher rates and fees. A private loan can be a short bridge, not a plan.

Can rental income help you pass the stress test?

Yes, and in the GTA this matters for anyone buying a house with a basement apartment. Under CMHC’s rules for an insured purchase:

• Up to 50% of gross rental income from the property being financed can be added to your income.
• For a two-unit owner-occupied home, CMHC will consider up to 100% of the gross rent from the secondary suite.

Lenders will want proof: a lease, a market rent appraisal, or both. A suite that is not legal or not rentable may get no credit at all. Ask your lender how they treat rent before you firm up an offer on a house with a suite.

What are OSFI’s loan-to-income limits?

Since each bank’s 2025 fiscal year, OSFI has capped the share of new uninsured mortgages each lender can make above 4.5 times the borrower’s income. This is a limit on the lender’s whole book, not on your file. You can still get a loan above 4.5 times income, but lenders have limited room for them, so files above that line face more questions. On a $120,000 income, 4.5 times is $540,000.

Will the stress test change in 2027?

No change has been announced as of 10 November 2026. OSFI says it reviews the floor and the 2-point buffer at least once a year, and its page was last updated on 29 January 2026 with the same rule. Budget 2026 proposed several mortgage measures, including insured mortgage rate information published by the Bank of Canada and a CRA income verification service, but none of the budget measures I read changes the qualifying rate.

What can change is your contract rate. The Bank of Canada said on 28 October that a further increase could be needed, and its next decision is on 9 December 2026. If rates rise again, the qualifying rate rises with them, and the same income buys less.

How can you pass the stress test more easily?

• Pay off small debts first. At a 6.44% qualifying rate, every $100 of monthly debt payments removes roughly $15,000 of borrowing power over 25 years.
• Use a longer amortization if you qualify. First-time buyers and buyers of new builds can get 30 years on an insured mortgage. See my guide to 30-year mortgages in Ontario.
• Shop the rate. Above 3.25%, every bit you shave off your contract rate lowers your qualifying rate too.
• Add a co-borrower’s income, with care, because they take on the debt too.
• Count rental income on a home with a legal suite.

What to do next

1. Add up your real monthly debts, including 3% of any card or credit line balance.
2. Get a pre-approval and ask the lender which rate they tested you at and which ratio, GDS or TDS, limited you.
3. Get the property tax, heating and condo fee figures for the homes you are considering before you make an offer.
4. If you are close to the limit, pay down a debt or look at a longer amortization before you shop.
5. Confirm your plan with a licensed mortgage professional. This article is general information, not financial advice.

Frequently asked questions

Sources

• OSFI — Minimum qualifying rate for uninsured mortgages
• OSFI — Loan-to-income limits for uninsured mortgage portfolios
• CMHC — Calculating GDS / TDS
• CMHC — CMHC Purchase eligibility and premiums
• FCAC — Preparing to get a mortgage (stress test, GDS and TDS)
• Department of Finance Canada — Mortgage reforms announced September 2024
• Bank of Canada — Policy rate decision, 28 October 2026
• Ratehub — Best 5-year fixed mortgage rates (accessed 10 November 2026)

Related reading

• The Bank of Canada Raised Rates: What It Means for GTA Buyers, Sellers and Owners
• Variable-Rate Mortgage After the Hike: How Much Your Payment Changes
• Should I Lock In My Variable Mortgage Before 2027?
• Mortgage Renewal in 2027 After the Rate Hike: Your Options in Ontario