Mortgage lenders use two calculations to help determine your eligibility for a mortgage - your Gross Debt Service (GDS) ratio and your Total Debt Service (TDS) ratio.
Your GDS ratio is the percentage of your gross monthly income used for mortgage payments, taxes and heating cost or - if you are buying a condominium - half of the monthly maintenance fees. As a general rule of thumb, your GDS ratio should not be
Your TDS ratio is the percentage of gross monthly income required to cover monthly housing cost, plus all the other debt payments, such as car loans or leases, credit card payments, lines of credit payments and any other debt.
Getting a pre-approved for a mortgage before looking at properties gives you a more realistic expectation of what you can afford.
However, keep in mind that the pre-approved amounts can overestimate what you can
Pre-approval does not guarantee you will
Order a copy of your credit report to make sure it does not contain any errors because lenders will check it before approving you for a mortgage. A credit report
The
Assess your present household budget and your annual income to determine if you are eligible for a mortgage and how much you can afford
Also check out the Mortgage Calculator here.
Courtesy of "Home Buyers Road Map" - Financial Consumer Agency of Canada