Mortgage Insurance explained
Mortgage default insurance protects a lender against losses if a borrower defaults and the home is sold for less than the outstanding balance. In Canada it is mandatory on high-ratio mortgages, those with a down payment under 20%. The three providers are CMHC (a federal Crown corporation), Sagen, and Canada Guaranty. The borrower pays the premium, but the protection is for the lender, not the homeowner.
The premium is calculated as a percentage of the loan and rises as the down payment shrinks. It is usually added to the mortgage and repaid over time rather than paid in cash. This insurance should not be confused with mortgage life or disability insurance, which are optional products that pay out to the borrower's family or cover payments if the borrower dies or is unable to work.