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Glossary
Mortgage

Gross Debt Service Ratio (GDS)

The percentage of your gross household income required to cover housing costs, including mortgage payments (principal and interest), property taxes, heating costs, and 50% of condo fees if applicable. Most lenders require your GDS to be no higher than 39%, meaning your housing costs should consume less than 39% of your pre-tax income.

Why It Matters

GDS is one of two key ratios lenders use to determine how much you can borrow. If your GDS exceeds 39%, most lenders will reduce the mortgage amount they're willing to offer. Understanding this ratio helps you set a realistic home-buying budget, especially in the GTA where housing costs are high relative to incomes.

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