Debt service calculator

Compare your monthly debt payments and housing expenses to your gross household income.

Did You Know?

Mortgage professionals use 2 main ratios to decide if borrowers can afford to buy a home: Gross Debt Service (GDS) and Total Debt Service (TDS). This calculator will give you both.



  • GDS is the percentage of your monthly household income that covers your housing costs. It must not exceed 39%.

  • TDS is the percentage of your monthly household income that covers your housing costs and any other debts. It must not exceed 44%.

For more information on these calculations, including guidance on which rental income to include in your household income, see Calculating GDS and TDS

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Date Published: March 31, 2018