Getting a Mortgage in Canada: How Much Can You Really Afford in 2026?

The Wrong Question

"How much can I afford?" is the most common question buyers ask before talking to a mortgage broker. It feels like the right question, but it usually leads to a number that's either too high or too low because online calculators skip the parts that matter most: the stress test, the GDS/TDS interaction, and whether you're looking at an insured, insurable, or conventional mortgage.

A more useful question is: what set of numbers does the lender actually use to qualify me, and which one is the binding constraint in my situation? For most Fraser Valley buyers, the binding constraint is one of 4 ratios: LTV, GDS, TDS, or the stress test floor. Knowing which one you're hitting tells you what to fix to qualify for more.

The next 5 sections walk through each piece with the actual math. The worked example at the end ties it all together with a realistic $100,000 joint household income.

LTV: Loan to Value Ratio

LTV compares the size of your mortgage to the appraised value of the property. The math is straightforward: a $1,000,000 home with an $800,000 mortgage is an 80% LTV. A $750,000 home with a $675,000 mortgage is a 90% LTV. The lower the LTV, the less risk the lender takes, and the more pricing flexibility you get.

LTV decides which mortgage category you're in. Above 80% LTV (less than 20% down) means an insured mortgage with default insurance. Between 65% and 80% LTV typically means conventional. At 65% LTV or below (35% or more down), you can qualify for the insurable rate tier with the lowest available rates after pure insured.

LTV also affects your qualifying rate. Lenders use LTV alongside credit score, income, debts, and the property type to assess risk. A high-LTV file with strong income often qualifies fine. A high-LTV file with weak credit or high debts may not. Understanding where your LTV lands is the first step in figuring out what bracket of rates you'll get.

GDS and TDS: The Two Debt Service Ratios

Capacity (the lender's word for "can you actually make the payments") is measured through 2 ratios.

GDS: Gross Debt Service Ratio

GDS is the percentage of your gross household income that goes to housing. It includes the mortgage payment, property tax, monthly heating costs (lenders use a flat estimate, often around $100), and 50% of strata fees if the property is a condo or townhouse. For most insured or insurable transactions, lenders allow up to 39% GDS. Some lenders go higher; some go lower based on their risk appetite.

TDS: Total Debt Service Ratio

TDS is GDS plus all your other monthly debt payments: car loans, credit card minimums (lenders use 3% of your statement balance, not just the actual minimum), lines of credit, student loans, support obligations. The standard limit is 44%. The gap between 39% GDS and 44% TDS gives you a 5% room for outside debts.

For a joint application, the ratios use combined household debts and combined income. So 2 spouses each making $50,000 with shared $100,000 income work the same as 1 person making $100,000, assuming both qualifying credit profiles and stable employment.

Refinances are different. Lenders may apply elevated debt service ratios on refi based on their risk assessment, so the same person who qualified for a purchase last year might qualify for less on a refi this year if their credit, income, or property values shifted.

The Mortgage Stress Test

All federally regulated lenders in Canada must qualify you at the higher of your contracted interest rate plus 2% OR the qualifying rate floor of 5.25%. This is the mortgage stress test, and it applies to insured, insurable, and conventional mortgages.

If your broker quotes you 4% on a 5-year fixed, you have to qualify as if it were 6% (4% + 2%). Your real payment is calculated at 4%, but for the GDS/TDS ratios, the lender uses the 6% number. If your broker quotes you 1.5% (back when rates were that low), the +2% only gets to 3.5%, which is below the 5.25% floor, so you have to qualify at 5.25%.

The stress test exists so that if rates rise, you can still afford the payments. It's why most online calculators overestimate what you can afford: they use the contracted rate, not the stress test rate. A real pre-approval uses the stress test math correctly, which is why the number that comes back from a broker is often 15% to 25% lower than what calculators suggest.

Insured, Insurable, and Conventional Mortgages

Canadian mortgages fall into 3 buckets based on your down payment, the property price, and a few other factors. Each bucket has different rate pricing, different insurance requirements, and different rules.

Insured (High-Ratio) Mortgages

Less than 20% down. Default insurance from CMHC, Sagen, or Canada Guaranty is mandatory. The premium is typically 2.8% to 4% of the mortgage amount and is added to your total mortgage balance, so you pay interest on it for the life of the loan. Insured mortgages are restricted to primary residences, properties priced under $1,000,000, and amortizations of 25 years or less. Counterintuitively, they get the LOWEST rates in the market because the lender takes on the least risk.

Insurable Mortgages

35% or more down (LTV of 65% or less). Same rules as insured (under $1,000,000, primary residence, 25-year max amortization), but the LENDER pays a much smaller insurance premium on the back end without you seeing it. You get the second-best rates in the market without paying the insurance yourself. This bracket is often the sweet spot for buyers who can put down a larger down payment.

Conventional (Uninsured) Mortgages

20% to 34% down, OR purchase price at $1,000,000+, OR rental property. No mortgage insurance involved. Amortizations can extend to 30 years (with most lenders). Rates are typically the highest of the 3 brackets because the lender holds all the default risk. Many Fraser Valley buyers fall here because the $1,000,000 threshold is easy to cross in Surrey, Langley, and South Surrey.

Worked Example: $100,000 Joint Household Income

Let's walk through the math with a clean example. Assume a joint household income of $100,000, no outside debts, no condo fees, property tax estimated at 1% of property value, and a flat $100/month for heating.

Roughly speaking, $100,000 joint income with no outside debts gets you in the range of a $400,000 to $500,000 mortgage in 2026 stress test conditions, depending on the contracted rate and the property tax assumption. Add 20% down on top and you're shopping for $500,000 to $625,000 properties. In Surrey or Langley, that range gets you a townhouse or older condo, not a detached.

Higher income, lower outside debts, larger down payment, and stronger credit all push the max upward. Outside debts, recent credit inquiries, variable income, and property tax above 1% of value all push it downward. A real pre-approval from a mortgage broker will give you the actual number for your specific file.

Why You Need a Real Pre-Approval (Not Just a Calculator)

Online calculators are a great starting point, but they're not what gets your offer accepted. Sellers and listing agents in the Fraser Valley want to see a written pre-approval from a real lender or broker before they take your offer seriously, especially in multiple-offer situations.

A real pre-approval gives you 2 things a calculator can't. First, an actual qualifying number based on your real credit, income, and documents (often different from the calculator estimate, sometimes by tens of thousands). Second, a broker who already has all your paperwork on file, so once you have an accepted offer, the file moves to funding much faster. In a Surrey or Langley competitive bid, that 24 to 48 hour speed advantage can make the difference between winning and losing.

If you don't already have a mortgage broker, I work with a short list of BC brokers I trust and can introduce you. Get the pre-approval done BEFORE you start home shopping, not after.

The Bottom Line

Mortgage affordability in Canada is the interaction of 4 ratios (LTV, GDS, TDS, stress test) plus the rules around insured, insurable, and conventional mortgages. None of these are negotiable; they're the same math every federally regulated lender uses. What changes is how aggressive a particular lender is at the edges and what discretionary discount they'll give you on the rate.

The most important number is the one that comes back from a real pre-approval, not the one your calculator suggests. The calculator usually skips the stress test and oversimplifies the ratios, which is why the real number is almost always lower than the estimate.

Talk to a mortgage broker first. Get the real number. Then start shopping homes within that range. The BC pre-approval guide walks through what to have ready before that first call.

Frequently Asked Questions