Calculate Gross Debt Service and Total Debt Service ratios — the key numbers lenders use to approve Canadian mortgages.
📖 What are GDS and TDS? GDS (Gross Debt Service) = housing costs ÷ gross income. Must be ≤ 32% for insured mortgages (some lenders allow up to 39% for conventional). TDS (Total Debt Service) = housing costs + all debts ÷ gross income. Must be ≤ 44%. These are Canada's primary mortgage qualification thresholds.