Mortgage Calculator Ontario Ratehub

This mortgage calculator helps you estimate your monthly payments and total interest costs when purchasing a home in Ontario. Simply enter your loan amount, interest rate, and amortization period to get an accurate calculation.

How to Use This Mortgage Calculator

Using our mortgage calculator is simple:

Enter the purchase price of the home you're considering
Input your down payment amount or percentage
Provide the current mortgage interest rate
Select your preferred amortization period (typically 5, 10, 15, or 20 years)
Click "Calculate" to see your estimated monthly payment and total interest paid

The calculator will display your monthly payment amount and the total interest paid over the life of the loan. You can also view a breakdown of how your payments are allocated between principal and interest.

Mortgage Payment Formula

The monthly mortgage payment is calculated using the following formula:

M = P [ i(1 + i)ⁿ ] / [ (1 + i)ⁿ - 1 ]

Where:

M = Monthly payment
P = Principal loan amount (Purchase price - Down payment)
i = Monthly interest rate (Annual rate divided by 12)
n = Number of payments (Amortization period in years × 12)

This formula uses the standard amortization method where each payment is split between interest and principal, with the principal portion growing each month.

Worked Example

Let's calculate a mortgage payment for a $400,000 home with a 20% down payment, 5.5% annual interest rate, and 25-year amortization period.

Down payment: $400,000 × 20% = $80,000
Principal loan amount: $400,000 - $80,000 = $320,000
Monthly interest rate: 5.5% ÷ 12 = 0.4583%
Number of payments: 25 × 12 = 300
Using the formula: M = $320,000 [ 0.004583(1 + 0.004583)³⁰⁰ ] / [ (1 + 0.004583)³⁰⁰ - 1 ]
This calculation results in a monthly payment of approximately $2,375.56

Over the 25-year period, you would pay a total of $791,962 in interest, with the total amount paid being $1,111,962.

Current Ontario Mortgage Rates

Ontario mortgage rates are influenced by several factors including the Bank of Canada's policy rate, the Ontario government's mortgage insurance premiums, and market conditions. As of the latest available data:

Fixed rates typically range from 5.5% to 6.5%
Variable rates are usually 0.5% to 1.5% above the Bank of Canada's target rate
Mortgage insurance premiums apply to down payments under 20% and vary by lender

For the most current rates, it's recommended to check with local mortgage brokers or financial institutions.

Frequently Asked Questions

What is the difference between fixed and variable mortgage rates?

A fixed-rate mortgage has an interest rate that remains the same for the entire loan term, while a variable-rate mortgage adjusts periodically based on market conditions. Fixed rates typically offer more stability, while variable rates may offer lower initial rates.

How does the amortization period affect my mortgage payments?

A longer amortization period means lower monthly payments but more total interest paid over the life of the loan. A shorter amortization period results in higher monthly payments but less total interest paid.

What is mortgage insurance and when do I need it?

Mortgage insurance protects lenders if you default on your mortgage. In Ontario, it's typically required when your down payment is less than 20% of the home's purchase price. The premium is added to your mortgage payments until you've paid back the full amount.