This is the question that every buyer needs to answer before they fall in love with a home they can't afford. And in Calgary, where average detached home prices have been above $650,000, getting this number right matters.
There are two answers to "how much can I afford" — the number the bank will lend you, and the number that actually works for your life. They're not always the same thing.
How Lenders Calculate Your Borrowing Limit
Canadian mortgage lenders use two ratios to determine how much they'll lend you:
Gross Debt Service (GDS) Ratio: Your total housing costs (mortgage principal + interest, property taxes, heat, and 50% of condo fees if applicable) should not exceed 32% of your gross household income.
Total Debt Service (TDS) Ratio: All of the above plus all other debt payments (car loans, credit cards, student loans, lines of credit) should not exceed 44% of your gross household income.
These ratios apply after you've passed the mortgage stress test, which requires you to qualify at the higher of your actual contracted rate plus 2%, or 5.25% — whichever is higher. This means you're qualifying at a rate higher than what you're actually paying, to ensure you can handle rate increases.
The Numbers: What Different Incomes Qualify For
Here's a rough guide based on typical Calgary lending conditions in 2026. These are estimates — your actual numbers depend on your down payment, existing debts, and lender specifics:
These numbers shift significantly based on existing debt. A $600/month car payment can reduce your qualifying amount by $80,000–$100,000.
The Down Payment Reality in Calgary
Down payment minimums in Canada are:
5% on the first $500,000 of the purchase price
10% on the portion between $500,001 and $999,999
20% on homes $1,000,000 and above (no CMHC insurance available)
For a $650,000 Calgary home:
5% of $500,000 = $25,000
10% of $150,000 = $15,000
Minimum down payment: $40,000
With a $40,000 down payment, CMHC insurance applies (3.10% premium on the insured mortgage of $610,000 = $18,910 added to your mortgage). Total mortgage: ~$628,910.
Monthly payment on that at a 5% rate over 25 years: approximately $3,650/month.
The Full Monthly Cost of Homeownership in Calgary
Your mortgage payment is only one piece of the monthly picture. Here's what actual homeownership costs in Calgary look like:
Note: the maintenance reserve isn't a payment to anyone — it's money you set aside for when the furnace dies or the roof needs work. If you don't budget for it, those costs hit you as emergencies.
The Difference Between "What You Qualify For" and "What You Can Afford"
A lender's maximum is the upper limit of what they'll lend — it's not a recommendation. Many financial advisors suggest that housing costs shouldn't exceed 28–30% of your take-home (not gross) income. The lender's ratios use gross income, which can lead to mortgage payments that feel very tight once taxes, RRSPs, childcare, and daily life are accounted for.
Before you commit to a specific price range, build your actual monthly budget:
Start with your monthly take-home income (after tax, CPP, EI)
Subtract fixed non-housing expenses (car, insurance, groceries, childcare, savings)
What's left is what you can realistically allocate to housing
If the mortgage payment on your target home takes you past that number, you're not financially ready for that home — even if a bank is willing to lend it.
First-Time Buyer Programs Worth Knowing
RRSP Home Buyers' Plan: First-time buyers can withdraw up to $35,000 per person ($70,000 per couple) from their RRSPs toward a down payment, repaid over 15 years without tax.
First Home Savings Account (FHSA): Introduced in 2023, first-time buyers can contribute up to $8,000/year (lifetime maximum $40,000) to an FHSA. Contributions are tax-deductible; withdrawals for a qualifying home purchase are tax-free.
Alberta does not have a first-time buyer land transfer tax rebate (because there's no provincial land transfer tax to rebate). But the federal First-Time Home Buyers' Tax Credit allows a $10,000 claim ($1,500 tax savings) on your income tax return.
Use the Right Tools Before You Commit to a Number
Start with Stuart's mortgage calculator to get a concrete monthly payment estimate at different price points and down payment levels. Then visit the first-time buyer page for a full guide to the programs and process available to Calgary buyers.
The Bottom Line
The bank will tell you your maximum. Your budget tells you your comfortable range. Buy at the edge of your maximum, and any financial shock — a job change, an unexpected expense, an interest rate renewal — hits harder. Buy within a number you can genuinely sustain, and you get to actually enjoy the home you're in.
Know your number. Then find the right home within it.
About the Author
Stuart Bartwicki is a REALTOR® with CIR Realty in Calgary, Alberta. A former teacher turned real estate advisor, Stuart has been helping Calgary families buy and sell with clarity and confidence since 2018. His approach is simple: educate first, so every decision feels like the right one. Learn more about Stuart → or book a strategy call.
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