OSFI Mortgage Stress Test & Affordability Calculator
Verify borrowing eligibility under the OSFI Guideline B-20 qualifying rate (rate + 2% or 5.25%), GDS (39%), and TDS (44%) ratios.
Verify borrowing eligibility under the OSFI Guideline B-20 qualifying rate (rate + 2% or 5.25%), GDS (39%), and TDS (44%) ratios.
Verify borrowing eligibility under the OSFI Guideline B-20 qualifying rate (rate + 2% or 5.25%), GDS (39%), and TDS (44%) ratios. Calculate exact, penny-accurate projections compliant with 2026 CRA • Bank of Canada standards using Calconova's deterministic IEEE-754 (Decimal.js) calculation engine with instant breakdowns.
EXCEEDS MAXIMUM ALLOWED RATIOS
Qualifying Rate: 6.69%
Stress Test Monthly Payment: $3,406.91
GDS Ratio (Max 39%)
39.3%
Exceeds 39% limit
TDS Ratio (Max 44%)
44.3%
Exceeds 44% limit
Qualifying Rate = max(Contract Rate + 2.00%, 5.25%); GDS ≤ 39%; TDS ≤ 44%OSFI Guideline B-20 requires all federally regulated mortgage borrowers to qualify at the higher of the contract mortgage rate plus 2% or 5.25%. Borrowers must also satisfy Gross Debt Service (GDS ≤ 39%) and Total Debt Service (TDS ≤ 44%) constraints.
All calculations, amortizations, and scenario projections displayed on this page are strictly for informational and educational purposes. Nothing herein constitutes investment, financial, tax, or legal advice. Actual CRA tax brackets, provincial taxes, Bank of Canada rates, and lender criteria may vary. Calconova explicitly disclaims all liability for any decisions taken based upon these calculations. Consult a qualified financial advisor or CPA prior to executing financial commitments.
Gross Debt Service (GDS) ratio cannot exceed 39% of your gross income for housing expenses (mortgage at stress test rate, property taxes, heat, and 50% condo fees). Total Debt Service (TDS) ratio cannot exceed 44% including all other debts (credit cards, car loans, student loans).
The federal floor is 5.25%. If your contract rate is 4.5%, you must qualify at 6.5% (contract + 2%). If your contract rate is 2.5%, you must qualify at 5.25% (the floor).
The stress test is federally mandated by OSFI for all uninsured and insured mortgages to protect homeowners and the banking system against sudden future interest rate hikes.
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