Canadian Mortgage Calculator

Understanding Canadian Mortgages

Purchasing a home in Canada comes with unique mortgage regulations and interest calculation practices that differ from those in the United States and other countries. The Canadian Mortgage Calculator helps you estimate your regular payments, calculate potential mortgage insurance costs, and view a complete amortization schedule.

The most critical difference in Canadian mortgages is how interest is compounded. By law, Canadian banks compound fixed-rate mortgage interest semi-annually (twice per year), even if your payments are made monthly, bi-weekly, or weekly. This semi-annual compounding ruleset generally results in a slightly lower effective interest rate compared to US mortgages, which are compounded monthly.

The Canadian Interest Compounding Formula

To compute your payment, the nominal annual interest rate must be converted into a period-equivalent rate based on semi-annual compounding. For a nominal annual interest rate $r$ and a payment frequency of $f$ times per year, the period interest rate $i$ is calculated using the following formula:

For standard monthly payments ($f = 12$), the equivalent monthly rate $i_m$ is:

Once the periodic interest rate $i$ is determined, the regular payment amount $P$ is calculated using the standard amortization formula, where $L$ is the total loan balance (including any CMHC insurance premiums) and $N$ is the total number of payments ($Amortization \times f$):

Down Payment and CMHC Insurance Rules in Canada

In Canada, the minimum down payment required depends on the purchase price of the home:

• For homes $500,000 or less: The minimum down payment is 5% of the purchase price.
• For homes between $500,001 and $999,999: The minimum is 5% on the first $500,000, plus 10% on the portion of the price above $500,000.
• For homes $1,000,000 or more: The minimum down payment is 20%. High-ratio (less than 20% down) insured mortgages are not allowed for properties valued at $1 million or more.

If your down payment is less than 20% of the home price, you must purchase mortgage default insurance, commonly provided by the Canada Mortgage and Housing Corporation (CMHC). The CMHC premium is a percentage of your loan amount, which is added directly to your mortgage balance:

• Down payment between 5% and 9.99%: 4.00% CMHC premium rate.
• Down payment between 10% and 14.99%: 3.10% CMHC premium rate.
• Down payment between 15% and 19.99%: 2.80% CMHC premium rate.
• Down payment of 20% or more: 0% (no CMHC insurance premium required).

Accelerated Weekly and Bi-Weekly Payments

Many Canadian homeowners select accelerated payment options to pay off their mortgages faster. Here is how they work:

• Regular Bi-weekly: Calculates your annual monthly payments, multiplies by 12, and divides by 26. You make 26 payments per year.
• Accelerated Bi-weekly: Takes your standard monthly payment and divides it by 2. You pay this amount 26 times per year. Because there are 52 weeks in a year, you end up paying the equivalent of 13 monthly payments annually, shaving years off your amortization and saving thousands in interest.
• Accelerated Weekly: Takes your standard monthly payment and divides it by 4. You make 52 weekly payments per year, also accelerating your principal payoff.