Buying a home in Canada starts with knowing what a lender will actually approve. Affordability is not just about your income — lenders also weigh your debts, property taxes, heat costs, and the federal mortgage stress test. This guide walks through each piece and shows how to estimate your maximum purchase price free online.
Why Affordability Is More Than Your Income
Lenders look at two debt ratios. Gross Debt Service (GDS) covers housing costs and Total Debt Service (TDS) adds other debt. Even a high income can be capped by car loans, credit cards, or student debt. Keeping these ratios below the lender limits is the fastest way to increase your approved purchase price.
The 2026 Canadian Mortgage Stress Test
Federally regulated lenders must qualify borrowers at a higher rate than the actual mortgage contract. As of mid-2026 this stress-test qualifying rate is generally 6.5% or your contract rate plus 2%, whichever is higher. This protects you against future rate increases but also lowers the maximum mortgage you can carry.
How Lenders Size Your Down Payment
Canada sets minimum down payments by price tier. A smaller down payment means a larger mortgage and, below 20%, a CMHC default insurance premium added to the loan. Saving even an extra 5% can remove insurance entirely and raise the price you can afford because the monthly payment falls.
A Worked Example
A household earning $90,000 per year with $500 in monthly debts, $4,000 annual property tax, and $150 monthly heat might qualify for a maximum home price near $415,000 with 10% down and a 6.5% stress-test rate. That drops sharply if debts rise or if the stress-test rate climbs.
Next Steps After the Estimate
Use the free mortgage affordability calculator to test different down payment, rate, and debt scenarios. Then compare the result with the mortgage payment calculator to see the full amortization schedule. Pre-approval from a lender or mortgage broker is the only way to lock in the real number.
Try the Mortgage Affordability Calculator Canada
Get an instant, free estimate with the 2026 Canadian rules built in.
Open Mortgage Affordability Calculator CanadaFrequently Asked Questions
What is the mortgage stress test in Canada?
The stress test checks whether you can still afford payments if interest rates rise. As of mid-2026, federally regulated lenders typically qualify you at the greater of your contract rate plus 2% or about 6.5%. This calculator uses 6.5% for estimation.
What are GDS and TDS ratios?
Gross Debt Service (GDS) is the share of your income that covers housing costs — mortgage, property tax, heat, and half of condo fees. Total Debt Service (TDS) adds other debt payments. Lenders usually cap GDS at 32% and TDS at 40%.
How much down payment do I need?
For homes under $500,000, the minimum is 5%. Between $500,000 and $999,999, it is 5% on the first $500,000 and 10% on the rest. Properties of $1 million or more require at least 20% down.
Does this calculator include CMHC insurance?
CMHC mortgage default insurance is required when your down payment is under 20%. This calculator estimates the premium and adds it to your mortgage balance, which raises your monthly payment slightly.
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