GDS & TDS Ratios
Uses industry-standard debt service ratios
Home Affordability Calculator
Calculate how much home you can afford based on your income
Home Affordability Calculator
Calculate How Much Home You Can Afford
Estimate your maximum home price based on income, debts, and down payment
CMHC Insurance
Includes mortgage insurance calculations
Real-Time Results
Instant calculations as you adjust inputs
Understanding Home Affordability in Canada
Determining how much home you can afford is one of the most important financial decisions you'll make. Our home affordability calculator uses industry-standard debt service ratios to help you understand your maximum home price based on your income, debts, and down payment.
What is GDS and TDS?
Canadian lenders use two key ratios to determine mortgage eligibility:
Gross Debt Service (GDS) Ratio
The GDS ratio measures your monthly housing costs (mortgage payment, property taxes, heating, and 50% of condo fees) as a percentage of your gross monthly income. Lenders typically require a GDS ratio of 39% or less.
Total Debt Service (TDS) Ratio
The TDS ratio includes all your monthly debt obligations (housing costs plus car loans, credit cards, student loans, etc.) as a percentage of gross monthly income. Lenders typically require a TDS ratio of 44% or less.
CMHC Mortgage Insurance
If your down payment is less than 20% of the home's purchase price, you'll need mortgage default insurance from CMHC (Canada Mortgage and Housing Corporation), Sagen, or Canada Guaranty. The insurance premium is based on your loan-to-value ratio:
- Down payment 5-9.99%: 4.00% premium
- Down payment 10-14.99%: 3.10% premium
- Down payment 15-19.99%: 2.80% premium
- Down payment 20%+: No insurance required
Mortgage Stress Test
Since 2018, all Canadian homebuyers must qualify at the higher of their contract rate plus 2% or 5.25%. This "stress test" ensures you can still afford your mortgage if interest rates rise. Our calculator uses your actual rate, but lenders will qualify you at the stress test rate.
Tips to Increase Your Home Affordability
1. Increase Your Down Payment
A larger down payment reduces your mortgage amount and can help you avoid CMHC insurance if you reach 20%.
2. Pay Down Existing Debts
Reducing monthly debt payments improves your TDS ratio, allowing you to qualify for a larger mortgage.
3. Add a Co-Borrower
Including a spouse or partner's income can significantly increase your borrowing capacity.
4. Shop for Better Rates
Even a 0.25% difference in interest rates can increase your affordability by thousands of dollars.
Additional Costs to Consider
Beyond your mortgage payment, budget for these additional homeownership costs:
- Property taxes: Typically 0.5-2.5% of home value annually
- Home insurance: $1,000-$3,000+ per year
- Utilities: Electricity, gas, water, internet ($200-$500/month)
- Maintenance: Budget 1-3% of home value annually
- Condo fees: If applicable ($200-$800+/month)
- Land transfer tax: One-time cost at purchase (varies by province)
First-Time Home Buyer Programs
First-time buyers in Canada can access several programs to help with affordability:
- First-Time Home Buyer Incentive: Shared equity mortgage with the government
- Home Buyers' Plan (HBP): Withdraw up to $35,000 from RRSP tax-free
- First-Time Home Buyer Tax Credit: $10,000 non-refundable tax credit
- GST/HST New Housing Rebate: Partial rebate on new construction
- Provincial programs: Many provinces offer additional rebates and credits
Frequently Asked Questions
What is the minimum down payment in Canada?
The minimum down payment is 5% for homes up to $500,000, 10% for the portion between $500,000-$1 million, and 20% for homes over $1 million.
How much income do I need to buy a $500,000 home?
With a 20% down payment ($100,000) and 5.5% interest rate, you'd need approximately $95,000-$105,000 annual household income, depending on your other debts.
Can I use my RRSP for a down payment?
Yes, first-time buyers can withdraw up to $35,000 from their RRSP tax-free through the Home Buyers' Plan. You must repay it over 15 years.
What credit score do I need for a mortgage?
Most lenders require a minimum credit score of 680 for insured mortgages and 700+ for uninsured mortgages. Higher scores get better rates.
Should I get pre-approved before house hunting?
Yes, mortgage pre-approval shows sellers you're a serious buyer and helps you understand your budget. Pre-approvals typically last 90-120 days.
How does the mortgage stress test work?
You must qualify at the higher of your contract rate plus 2% or 5.25%. This ensures you can afford payments if rates increase.
What's the difference between fixed and variable rates?
Fixed rates stay the same for your term (typically 5 years), while variable rates fluctuate with the Bank of Canada's prime rate. Fixed offers stability, variable may save money if rates drop.
Can self-employed people get mortgages?
Yes, but you'll typically need 2 years of tax returns and financial statements. Some lenders offer stated income programs with larger down payments.
Important Disclaimer
This calculator provides estimates based on standard lending criteria. Actual mortgage approval depends on many factors including credit score, employment history, and lender-specific policies. Always consult with a mortgage professional for personalized advice.
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