Total Debt Service Ratio Formula

Total Debt Service Ratio Formula:
PITH1+ Other Debt / Borrower’s Gross Annual Income2

1PITH means principal, interest, property taxes and heat costs plus 50% of the condominium fees. For
chattel or leasehold loans, include 100% of site or ground rents.
250% of subject property gross rental income can be included. T+H for the property generating rental
income can be excluded. Visit www.cmhc.ca and search key words “TDS formula” for more information.
Flexibility provided for borrowers who have a strong history of managing credit. Total Debt
Service Ratio 42.01- 44%: Recommended minimum score of 680.