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How much can you afford?

Real Canadian affordability math: GDS/TDS ratios, the federal stress test, and your actual monthly debts. No marketing fluff.

Annual household income$150,000

Down payment$100,000

Other monthly debts$500

Car payment, student loan, credit card minimums, child support, etc.

Contract rate4.19%

Amortization25 years

Annual property tax (est.)$5,500

Get pre-approved for real

Maximum purchase price

$725,000

Maximum mortgage$625,000

Estimated monthly payment$3,365

Stress-tested at6.19%

Limiting ratioGDS

GDS used39%

TDS used42%

How affordability is actually calculated

Canadian lenders use two debt-service ratios:

GDS (Gross Debt Service): Mortgage payment + property tax + heating + 50% of condo fees, divided by gross income. Maximum 39% on most insured files.
TDS (Total Debt Service): GDS plus all other monthly debt obligations (car, student loan, credit card minimums). Maximum 44% on most insured files.

You also have to pass the federal stress test—qualifying at the higher of contract rate plus 2% or 5.25%. This calculator applies all three constraints and shows you the binding one.

Reality check: this is a model. Your real pre-approval depends on credit score, employment type, and lender-specific overlays. The calculator is a great planning tool—your actual approval is what matters.