Home Affordability Calculator

How it works

This calculator has two practical modes. The income mode estimates a buying range from household income, current debt payments, saved cash, mortgage rate, property tax, heating, condo fees, and amortization. The property mode starts with a specific home price and estimates the full monthly carrying cost, not just the mortgage payment.

Why the practical price can be lower than the lender ceiling

A lender qualification number answers one question: how much debt could the household possibly qualify for under the assumptions used. A practical shopping number asks a better question: what price still leaves room for emergency savings, repairs, retirement contributions, child care, travel, insurance increases, and normal life.

Mortgage stress-test logic

The calculator uses a qualifying rate based on the higher of the entered mortgage rate plus 2 percentage points or 5.25%. That higher rate is used when estimating the maximum price supported by the mortgage payment. The actual payment shown for a specific property uses the entered contract rate.

What is included in monthly ownership cost?

The property mode includes principal and interest, property tax, a maintenance set-aside, home insurance, and condo or maintenance fees where relevant. This is why two homes with the same mortgage can feel very different month to month.

Mistakes to avoid

Do not compare a home price only with salary, and do not compare rent only with the mortgage payment. Debt payments, property tax, condo fees, heating, maintenance, insurance, closing costs, and the stress-test rate can all change the answer. The safer approach is to test a practical target first, then test the exact home second.

First-time buyer notes

The first-time buyer section highlights common planning items such as FHSA room, RRSP Home Buyers' Plan room, the federal Home Buyers' Amount, and land transfer tax rebates where available. These are estimates for planning and should be confirmed against current government rules before buying.

GDS and TDS ratios explained

Canadian lenders usually screen affordability with two ratios. The Gross Debt Service (GDS) ratio compares your housing costs — mortgage payment, property tax, heating, and half of any condo fees — against your gross income. The Total Debt Service (TDS) ratio adds your other debt payments, such as car loans, lines of credit, and minimum credit card payments. Many lenders look for a GDS at or below roughly 39% and a TDS at or below roughly 44%, though exact limits vary by lender, insurer, and credit profile.

These ratios explain why two households with the same income can qualify for very different amounts. A household with a car payment and a student loan has less room under the TDS ceiling than a household with no other debt, even if their paycheques are identical. Reducing other monthly obligations before applying is often the fastest way to increase a mortgage budget.

Down payment and mortgage default insurance

In Canada, the minimum down payment is 5% on the first $500,000 of the price and 10% on the portion above that, up to the insured price limit. When the down payment is less than 20%, the mortgage usually requires default insurance (commonly from CMHC, Sagen, or Canada Guaranty). The premium is added to the loan, so a smaller down payment increases both the amount borrowed and the insured premium you carry over the life of the mortgage.

A 20% down payment removes the insurance requirement and lowers the monthly payment, but it also ties up more cash. The right balance depends on how much liquidity you want to keep for closing costs, moving, furniture, and an emergency buffer. Draining every dollar into a down payment can leave a household house-rich and cash-poor in the first year, which is exactly when unexpected costs tend to appear.

Closing costs to budget for

The purchase price is only part of the cash you need. Plan for land transfer tax (with first-time buyer rebates where available), legal fees, title insurance, a home inspection, an appraisal, and adjustments for prepaid property tax or utilities. A common planning range is 1.5% to 4% of the purchase price, depending on your province and whether land transfer tax applies. Building these into your plan prevents a last-minute cash shortfall at closing.

A worked example

Consider a household earning $110,000 with a $400 monthly car payment, $60,000 saved, a 5% mortgage rate, and a 25-year amortization. The lender ceiling might approve a price near the top of their qualifying range, but the practical price that still protects savings and retirement contributions is often lower. If the same household clears the car loan first, their TDS room improves and the qualifying amount can rise without any change in income. This is why the calculator shows both a maximum and a more conservative practical target: the gap between them is where financial comfort lives.

How to increase your home budget safely

• Pay down other debt: Clearing a car loan or line of credit frees up TDS room quickly.
• Grow the down payment: More down means a smaller loan, a lower payment, and potentially no default insurance premium.
• Improve your credit profile: A stronger score can affect the rate you are offered, which changes the payment on the same price.
• Extend amortization carefully: A longer amortization lowers the monthly payment but increases total interest, so treat it as a trade-off, not a free win.
• Shop the rate: Even a small rate difference changes how much home the same payment can support.

Frequently asked questions

How much home can I afford on my salary?

There is no single multiple that fits everyone. Affordability depends on income, existing debt, down payment, the mortgage rate, property tax, and ongoing costs like condo fees and maintenance. Use the income mode for a range, then stress-test it against your real monthly budget.

Should I borrow the maximum the lender approves?

Usually not. The maximum answers what you could qualify for, not what leaves room for savings, repairs, and life changes. Many buyers are more comfortable targeting a price below the ceiling so a rate increase at renewal does not strain the budget.

What ongoing costs do buyers underestimate?

Maintenance, property tax increases, home insurance, condo fee increases, and higher payments at renewal are the most commonly underestimated costs. Budgeting a maintenance set-aside from day one helps avoid surprises.

Does this calculator guarantee mortgage approval?

No. It is an educational planning tool using common Canadian conventions. Actual approval depends on the lender's underwriting, your credit, employment history, and current insurer rules. Confirm your file with a licensed mortgage professional.

Sources and further reading

Mortgage affordability rules and stress-test assumptions change over time. This page uses common Canadian mortgage-planning conventions for education and comparison, not lender approval. Confirm your file with a licensed mortgage professional before relying on any purchase price.

Last reviewed: May 18, 2026