PropertySearchGPT's mortgage calculator estimates your monthly mortgage payment for any Ontario property. Enter the home price, your down payment, the interest rate, and your preferred amortization period to see an instant breakdown of your principal and interest payment, total CMHC mortgage default insurance (where applicable), total interest paid over the life of the mortgage, and the effective monthly carrying cost. The calculator covers purchases up to $1.5 million and amortization periods from 5 to 30 years.
In Canada, any home purchase with a down payment below 20% requires mortgage default insurance, commonly called CMHC insurance. The calculator automatically applies the correct CMHC premium based on your loan-to-value ratio: 4.00% for a down payment between 5% and 9.99%, 3.10% for 10% to 14.99%, and 2.80% for 15% to 19.99%. No premium applies when your down payment is 20% or more. The premium is added to your mortgage balance and amortized over the life of the loan, which is why the calculator shows how it affects your monthly payment.
The amortization period is the total length of time it takes to pay off your mortgage in full. A 25-year amortization is the most common choice for insured mortgages in Canada. Extending to 30 years lowers your monthly payment but increases the total interest paid significantly. Shortening to 15 or 20 years raises the monthly payment but reduces the interest cost over time. The calculator lets you compare these trade-offs instantly by adjusting the amortization slider.
Canadian lenders are required to qualify borrowers at the higher of the Bank of Canada's qualifying rate or your contract rate plus 2%. This stress test ensures you can still afford the mortgage if rates rise after you sign. The affordability section of the calculator shows the minimum annual household income typically required to qualify at the payment you have entered, based on a standard gross debt service ratio of 32%.
Start by entering the property price from any Ontario MLS® listing. Set your down payment as either a dollar amount or a percentage of the purchase price. Enter the current mortgage rate offered by your lender or use the current Bank of Canada benchmark as a starting point. Choose your amortization period and payment frequency — monthly, semi-monthly, bi-weekly, or weekly — and the calculator updates instantly. Use the results alongside PropertySearchGPT's property listings to compare the carrying costs of different homes.
The minimum down payment is 5% of the purchase price for homes up to $500,000. For homes between $500,000 and $999,999, it is 5% on the first $500,000 and 10% on the remainder. Homes priced at $1,000,000 or more require a minimum 20% down payment and are not eligible for CMHC insurance.
The base calculation covers principal, interest, and CMHC insurance. The affordability section includes an estimate for property taxes and, where applicable, maintenance fees, because lenders factor all housing costs into the gross debt service ratio when qualifying borrowers.
Yes. For a refinance, enter your outstanding mortgage balance as the home price and set the down payment to zero. For a renewal, enter your remaining balance and the new rate your lender has offered to see the revised monthly payment.
The calculator uses the standard Canadian mortgage payment formula with semi-annual compounding, which is required by law for fixed-rate mortgages in Canada. Results are estimates for planning purposes; your actual payment will depend on the exact terms offered by your lender.