Total debt service ration

The percentage of your household’s gross monthly income that goes toward housing costs (i.e., mortgage, property taxes, heating, etc.) plus your other debts and financing (i.e., car loans, credit cards, etc.). Banks use this calculation, along with your GDRS ratio, when assessing your mortgage application. Sagen programs require a TDSR of no greater than 44%. See also: Gross debt service ration (GDSR)