Debt Service Calculator
Calculate your GDS and TDS ratios to determine mortgage affordability
Financial Information
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Your Results
Gross Debt Service (GDS) Ratio
0.00%
Total Debt Service (TDS) Ratio
0.00%
Lender Guidelines
• GDS Ratio: <= 32% (Excellent), <= 39% (Good)
• TDS Ratio: <= 37% (Excellent), <= 44% (Good)
• Lower ratios = better mortgage rates
• Higher ratios = more difficult to qualify
About Debt Service Ratios
GDS Ratio
Gross Debt Service ratio measures your housing costs (mortgage, property tax, heating, condo fees) as a percentage of your gross income. Most lenders prefer this ratio to be 32% or less.
TDS Ratio
Total Debt Service ratio includes all your housing costs plus other debt payments (credit cards, loans, etc.) as a percentage of your gross income. Most lenders prefer this ratio to be 37% or less.