Mortgage Affordability Calculator Canada
Find out how much house you can afford based on your income, monthly debts, and down payment. Includes the Canadian mortgage stress test and GDS/TDS ratio calculations.
Last updated: March 21, 2026 • Reviewed by Calculator Canada Editorial Team
How Much Mortgage Can You Afford in Canada?
Determining how much mortgage you can afford is the critical first step in the Canadian home-buying process. Unlike simply looking at what a lender will approve, true affordability means finding a mortgage payment that fits comfortably within your overall budget while still allowing you to save, invest, and enjoy life.
Canadian lenders use two key debt service ratios — GDS (Gross Debt Service) and TDS (Total Debt Service) — to determine your maximum mortgage. On top of that, the mortgage stress test requires you to qualify at a higher rate than you will actually pay, further limiting how much you can borrow. Our calculator factors in all of these Canadian-specific requirements to give you a realistic maximum.
Understanding GDS and TDS Ratios
These two ratios are the gatekeepers of mortgage approval in Canada. Every lender uses them, and you must pass both:
GDS Ratio (Gross Debt Service) — Maximum 32-39%
The GDS ratio measures your housing costs as a percentage of gross income. Housing costs include your mortgage payment (principal + interest), property taxes, heating costs, and 50% of condo fees if applicable. The standard maximum is 32% for conventional mortgages. Insured mortgages (less than 20% down) may allow up to 39% with strong credit.
Formula: GDS = (Mortgage Payment + Property Tax + Heating + 50% Condo Fees) ÷ Gross Monthly Income × 100
TDS Ratio (Total Debt Service) — Maximum 40-44%
The TDS ratio adds all other monthly debt payments to your housing costs. This includes car loans, credit card minimum payments, student loans, personal loans, child support, and any other recurring debt obligations. The standard maximum is 40%, with insured mortgages potentially allowing up to 44%.
Formula: TDS = (Housing Costs + All Other Debt Payments) ÷ Gross Monthly Income × 100
| Ratio | What It Measures | Conventional Max | Insured Max |
|---|---|---|---|
| GDS | Housing costs ÷ gross income | 32% | 39% |
| TDS | (Housing + all debts) ÷ gross income | 40% | 44% |
Important: The stress test means your GDS and TDS are calculated using the higher qualifying rate, not your actual mortgage rate. This significantly reduces the maximum mortgage compared to what the payment alone would suggest.
The Mortgage Stress Test and Affordability
The Canadian mortgage stress test requires you to qualify at the higher of your contracted rate plus 2%, or 5.25% (the Bank of Canada qualifying rate). This is the single biggest factor that limits how much Canadians can borrow.
Here is how the stress test impacts affordability at different income levels (assuming $500/month in other debts, 25-year amortization, $350/month property tax, $150/month heating):
| Household Income | Actual Rate (4.99%) | Stress Test Rate | Max Mortgage | Max Home (20% down) |
|---|---|---|---|---|
| $75,000 | 4.99% | 6.99% | $285,000 | $356,000 |
| $100,000 | 4.99% | 6.99% | $420,000 | $525,000 |
| $125,000 | 4.99% | 6.99% | $555,000 | $694,000 |
| $150,000 | 4.99% | 6.99% | $690,000 | $863,000 |
| $175,000 | 4.99% | 6.99% | $825,000 | $1,031,000 |
| $200,000 | 4.99% | 6.99% | $960,000 | $1,200,000 |
Without the stress test, a household earning $100,000 could qualify for approximately $530,000. With the stress test, the maximum drops to about $420,000 — a reduction of over $100,000. While this may feel limiting, it protects borrowers from becoming house-poor if rates increase during their mortgage term.
How to Increase Your Mortgage Affordability
- Pay off existing debts first — every $100/month reduction in debt payments increases your mortgage affordability by approximately $18,000-$20,000. Paying off a $400/month car loan before buying could add $72,000-$80,000 to your maximum mortgage.
- Increase your down payment — a larger down payment means you need a smaller mortgage. It also avoids CMHC insurance (below 20% down) and may qualify you for better rates.
- Add a co-borrower — combining incomes with a spouse or partner dramatically increases your qualifying income and maximum mortgage.
- Extend the amortization — choosing 30 years instead of 25 lowers the monthly payment used in ratio calculations, increasing your maximum. This is available for first-time buyers on insured mortgages and for uninsured mortgages.
- Lower your property tax estimate — if you are flexible on location, cities with lower property taxes increase your affordability. Rural areas often have significantly lower property taxes than major cities.
- Improve your credit score — a score above 680 gives access to better rates; above 760 unlocks the most competitive offers. A 0.5% lower rate can increase your affordability by $20,000-$30,000.
- Shop for the best rate — even a small rate difference matters because the stress test adds 2% on top. A lower base rate means a lower stress test rate, increasing your maximum mortgage.
How Much Home Can You Afford by Income (Canada 2026)
Here is a general affordability guide based on different household incomes. These assume 20% down payment, 25-year amortization, 4.99% rate, $500/month other debts, and standard property tax and heating costs:
| Household Income | Max Home Price | Monthly Payment | Recommended Max |
|---|---|---|---|
| $60,000 | $310,000 | $1,450 | $250,000 – $280,000 |
| $80,000 | $435,000 | $2,030 | $370,000 – $400,000 |
| $100,000 | $525,000 | $2,450 | $450,000 – $500,000 |
| $120,000 | $660,000 | $3,080 | $560,000 – $620,000 |
| $150,000 | $863,000 | $4,030 | $720,000 – $800,000 |
| $200,000 | $1,200,000 | $5,600 | $1,000,000 – $1,100,000 |
The "Recommended Max" column shows a more conservative range that keeps your total housing costs below 28% of gross income — giving you more breathing room for savings, emergencies, and lifestyle. Just because you can qualify for a certain amount does not mean you should borrow that much.
Affordability in Major Canadian Cities (2026)
Housing affordability varies dramatically across Canada. Here is what the average home costs in major cities and the income needed to qualify:
| City | Avg Home Price | Down (20%) | Income Needed |
|---|---|---|---|
| Toronto, ON | $1,100,000 | $220,000 | $185,000 |
| Vancouver, BC | $1,250,000 | $250,000 | $210,000 |
| Ottawa, ON | $650,000 | $130,000 | $120,000 |
| Calgary, AB | $580,000 | $116,000 | $110,000 |
| Montreal, QC | $550,000 | $110,000 | $105,000 |
| Edmonton, AB | $420,000 | $84,000 | $85,000 |
| Winnipeg, MB | $380,000 | $76,000 | $78,000 |
| Halifax, NS | $490,000 | $98,000 | $95,000 |
Toronto and Vancouver remain the most challenging markets for affordability. Buyers in these cities often need household incomes above $180,000-$210,000 to qualify for an average home. In contrast, cities like Edmonton, Winnipeg, and regions across Atlantic Canada remain accessible to households earning $80,000-$100,000.