Step 1 - Gross Annual 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 should be at or under 35%.
  • TDS is the percentage of your monthly household income that covers your housing costs and any other debts. It should be at or under 42%.

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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Step 2 - Monthly Housing Expenses

Did You Know?

You need to enter the expenses for the home you would like to purchase, not for your current living situation.

If you don’t know the monthly mortgage payment for the home you would like to purchase, use our Mortgage calculator.

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Step 3 - Monthly Debt Payments

Did You Know?

Unlike your Gross Debt Service ratio (GDS), your Total Debt Service ratio (TDS) includes monthly debt payments that are unrelated to housing expenses.

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Disclaimer

This calculator is for illustrative purposes only. While every effort is made to keep this tool up-to-date, CMHC does not guarantee the accuracy, reliability or completeness of any information or calculations provided by this calculator. CMHC is not be liable for loss or damage of any kind arising from the use of this tool.