Mortgage Affordability in Canada: How Much House Can You Buy?
Understand how lenders assess affordability using GDS/TDS ratios, the stress test, and your down payment. Try the interactive calculator below.
🧮 Affordability Calculator (Canada GDS/TDS + Stress Test)
⚠️ Disclaimer
This calculator and examples are for educational purposes only and use simplified assumptions. Actual qualification depends on full underwriting, credit profile, property type, taxes, heat, condo fees, insurance, and lender policies.
For accurate, personalized affordability and rates, please consult a licensed mortgage agent or your bank.
🔑 Key Factors Lenders Use
Income
Household gross (pre-tax) income determines monthly capacity.
GDS/TDS
GDS ≤ 39% (mortgage + tax + heat + 50% condo fees).
TDS ≤ 44% (GDS + all other debts).
Down Payment
Minimum: 5% (<$500k), 5%+$10% (to $999,999), 20% (≥$1M). More down = lower payment.
Rate & Amortization
Stress test uses the greater of 5.25% or (your rate + 2%). Longer amortization lowers payment.
📊 Quick Examples (Illustrative)
First-Time Buyer
- Income: $80,000
- Down: $40,000
- Debts: $100/mo
- Rate: 5.25% (stress)
Approx. price: $450k–$475k
Growing Family
- Income: $120,000
- Down: $60,000
- Debts: $700/mo
- Rate: 5.25% (stress)
Approx. price: $600k–$650k
High-Income Couple
- Income: $200,000
- Down: $150,000
- Debts: $0
- Rate: 5.25% (stress)
Approx. price: $1,000,000+
❓ Mortgage Affordability FAQs
Common questions home buyers ask about how much house they can afford in Ontario.
Mortgage affordability refers to how much house you can afford to buy based on your income, debts, expenses, and the lender’s qualification criteria. It shows the maximum loan amount a bank or mortgage lender is likely to approve for you.
Most lenders use two key ratios:
- Gross Debt Service (GDS): Housing costs (mortgage, property taxes, heat, 50% condo fees) should be ≤ 32–39% of your income.
- Total Debt Service (TDS): All debts (housing + credit cards, car loans, student loans) should be ≤ 40–44% of your income.
They also consider credit score, employment, and down payment size.
The bigger your down payment, the less you need to borrow. For example, if you buy a $600,000 home with a 20% down payment ($120,000), you only need a $480,000 mortgage. That lower loan reduces your monthly payments and makes approval easier.
Higher interest rates increase your monthly payments, which reduces how much mortgage you qualify for. For instance, a $500,000 mortgage at 2.5% costs about $2,240/month, but at 5.5% it jumps to ~$3,070/month. This means you may need to adjust your budget as rates move.
Yes. Lenders include all your monthly debt obligations when calculating affordability. A $500/month car payment, for example, can reduce your maximum mortgage approval by over $100,000 depending on your income.
Yes. In Canada, you must qualify at the greater of your contract rate + 2% or the Bank of Canada’s benchmark rate (currently 5.25%). Even if you’re offered 4.5%, you must prove you can afford ~6.5%, which lowers the maximum amount you can borrow.
- Increase your income or get a co-signer.
- Pay down existing debts.
- Save for a larger down payment.
- Improve your credit score for better rates.
- Choose a longer amortization (like 30 years) to reduce monthly payments.
