GDS Calculator — Affordability First

Borrower Income

Annual Gross Income #1

Enter annual before‑tax income (CAD).

Annual Gross Income #2 (optional)

Mortgage Terms & Rate Basis

Mortgage Amount

Amortization (years)

Contract Interest Rate (%)

MQR / Qualifying Rate (%) (for stress test)

Current OSFI B-20 floor: 5.25%. The stress-test rate is always at least 5.25%, regardless of the value entered here.

Payment Basis

Stress‑test uses max(contract + 2.00%, MQR) with a minimum floor of 5.25% (OSFI B-20). Choose the basis your lender applies.

Housing Costs Included in GDS

Property Taxes (annual)

Heating (monthly)

Condo Fees (monthly) (50% counted)

Other Housing Costs (monthly) (if lender includes)

Annual Income

Monthly Income

Monthly P&I

GDS Costs

30% 33% 39%

0.0%

Enter details to see guidance.

Guidance bands: ≤ 30% (prudent), 30–33% (caution), 33–39% (high), >39% (exceeds OSFI B-20 / CMHC GDS limit).

Contract rate: –%

Monthly P&I: $0

Stress‑test rate (max(contract + 2.00%, MQR)): –%

Monthly P&I: $0

Note: This tool focuses on GDS only. It does not compute TDS or lender‑specific exceptions. Always verify lender guidelines.