Mortgage Affordability in Canada: How Much Can You Actually Borrow?

Key Factors That Determine Mortgage Affordability

When you apply for a mortgage in Canada, lenders evaluate several factors to decide how much you can borrow. Your gross household income, existing debts, down payment, credit score, and the size of your housing-related costs all play a role. The two primary ratios lenders use are the Gross Debt Service (GDS) ratio and the Total Debt Service (TDS) ratio.

Lenders also apply a 'stress test' to ensure you can still make payments if interest rates rise. These guidelines help protect both you and the lender from taking on too much debt.

• Gross household income (before taxes)
• Existing debt payments (car loans, credit cards, student loans, etc.)
• Down payment amount and source
• Property taxes, heating costs, and condo fees (if applicable)
• Credit score and credit history
• Current mortgage interest rate and the stress test rate

Sources: Government of Canada, Mortgage Calculator, nesto

Understanding GDS and TDS Ratios

The Gross Debt Service (GDS) ratio compares your monthly housing costs to your gross monthly income. It includes your mortgage payment, property taxes, heating costs, and, if you live in a condo, 50% of your condo fees. The Government of Canada suggests that total monthly housing costs should not exceed 39% of your gross household income.

The Total Debt Service (TDS) ratio is broader: it includes all your monthly housing costs from the GDS calculation plus all other debt payments, such as car loans, credit cards, student loans, and other obligations. The Government of Canada recommends that your total debt load should not exceed 44% of your gross income.

For insured mortgages (down payment under 20%), these maximums are commonly used. For uninsured mortgages (down payment of 20% or more), some lenders may apply more conservative limits, but exact thresholds vary by lender.

• GDS = (Mortgage payment + Property taxes + Heating + 50% of condo fees) / Gross monthly income
• TDS = GDS (above) + All other debt payments / Gross monthly income
• Maximum GDS: 39% for insured mortgages (Government of Canada guideline)
• Maximum TDS: 44% for insured mortgages (Government of Canada guideline)

Sources: Government of Canada, nesto, Mortgage Calculator, Canada Mortgage and Housing Corporation (CMHC)

The Mortgage Stress Test Explained

Canada's mortgage stress test requires borrowers to qualify at a minimum qualifying rate (MQR) that is set by regulation. While the exact rate can change, it is generally higher than the contract rate you negotiate with the lender. Lenders use this qualifying rate to calculate your maximum mortgage amount, so even if you qualify for a certain payment at the contract rate, the stress test can lower the amount you can borrow.

The stress test applies to new mortgages and refinances from federally regulated lenders, but not to straight switches between lenders without increasing the loan amount or amortization, nor to renewals with the same lender under the same terms.

• Qualify at a minimum qualifying rate set by regulation, which is higher than the contract rate
• Applies to new mortgages and refinances from federally regulated lenders
• Does not apply to straight switches between lenders or renewals with the same lender under the same terms

Sources: nesto, NerdWallet Canada, WOWA.ca

Calculating Your Maximum Purchase Price

To estimate your maximum purchase price, you need to consider your GDS and TDS ratios, your down payment, and the stress test. A common rule of thumb suggests that you can afford a mortgage of about 3.5 to 4.5 times your gross annual household income, assuming minimal existing debt. However, this is only a general guideline, and actual lenders use more detailed calculations that take into account your specific housing costs, debts, and the stress test.

The actual amount you qualify for will depend on your unique financial situation, and can vary significantly based on interest rates, property taxes, heating costs, and other debts.

• Rule of thumb: mortgage amount = 3.5–4.5 × gross annual household income (assuming minimal debt)
• Actual amount is determined by GDS/TDS ratios, the stress test, down payment, and other debts
• Consult a mortgage professional for a personalized estimate

Sources: nesto

Down Payment Requirements and Default Insurance

The minimum down payment in Canada depends on the purchase price of the home: for homes up to $500,000, the minimum is 5% of the purchase price. For homes priced at $1.5 million or more, a minimum down payment of 20% is required.

Sources: nesto, TD Canada Trust

Example Affordability Calculation

To illustrate, consider a household with a gross annual income of $100,000 and no other debts. This is a rough estimate and not a guarantee of qualification.

The actual amount you can borrow will be determined by a lender's assessment of your GDS/TDS ratios, the stress test, and your down payment. It is important to get a pre-approval from a lender to know your exact borrowing capacity.

• Gross annual income: $100,000
• Actual amount varies based on interest rates, debts, and stress test

Sources: nesto

How to Improve Your Affordability

If you find that you cannot qualify for the mortgage you want, there are several strategies you can use to improve your affordability. Reducing your existing debt is one of the most effective ways, as it lowers your TDS ratio. Increasing your down payment can also help by reducing the size of the mortgage you need and possibly lowering or eliminating the need for default insurance.

You can also consider reducing other housing costs, such as choosing a home with lower property taxes or heating costs. Additionally, improving your credit score can help you secure a better interest rate, which in turn can lower your monthly payments and increase the amount you can borrow.

While not directly part of the GDS/TDS calculation, a better credit score can help you qualify for a lower rate, making it easier to pass the stress test.

• Pay down existing debts to lower your TDS ratio
• Save for a larger down payment to reduce mortgage size
• Choose a home with lower property taxes and heating costs
• Improve your credit score to get a better interest rate

Sources: Government of Canada, Mortgage Calculator, nesto