Mortage Calculator Ontario

This mortgage calculator helps you estimate your monthly payments for a home loan in Ontario. Enter your loan amount, interest rate, and term to get an accurate calculation of your principal and interest payments, amortization schedule, and total interest paid.

How to Use This Calculator

To calculate your mortgage payments:

Enter the loan amount (the total amount you're borrowing)
Enter the interest rate (annual percentage rate)
Select the amortization period (how long you'll pay back the loan)
Click Calculate to see your monthly payment

The calculator will show you:

Your estimated monthly payment
Total interest paid over the life of the loan
A breakdown of principal vs. interest payments
A chart showing your amortization schedule

Note: This calculator provides estimates only. Your actual mortgage payments may vary based on additional fees, taxes, and changes in interest rates.

Formula Used

The calculator uses the standard mortgage payment formula:

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

Where:

M = Monthly payment
P = Principal loan amount
i = Monthly interest rate (annual rate divided by 12)
n = Number of payments (amortization period in years × 12)

This formula calculates the fixed monthly payment required to fully amortize the loan over the selected term.

Worked Example

Let's calculate a mortgage payment for a $300,000 loan at 5% interest over 25 years:

Principal (P) = $300,000
Annual interest rate = 5% (0.05)
Monthly interest rate (i) = 0.05/12 ≈ 0.004167
Number of payments (n) = 25 × 12 = 300

Plugging these into the formula:

M = 300,000 [ 0.004167(1 + 0.004167)³⁰⁰ ] / [ (1 + 0.004167)³⁰⁰ - 1 ]

M ≈ $1,876.36 per month

Over 25 years, you would pay approximately $1,876.36 each month, with a total of $675,488.00 paid (including principal and interest).

Interpreting Results

Your mortgage calculator results include several important components:

Monthly Payment

The amount you'll pay each month, which includes both principal and interest. This amount remains the same throughout the loan term for a fixed-rate mortgage.

Total Interest Paid

The difference between the total amount paid and the original loan amount. This shows how much you'll pay in interest over the life of the loan.

Amortization Schedule

A chart showing how your payments are applied to principal and interest over time. Early payments mostly cover interest, while later payments focus more on principal.

Payment Breakdown

A table showing the allocation of each payment to principal and interest. This helps you understand how quickly you're paying down the loan.

Remember: Lower interest rates and shorter loan terms can significantly reduce your total interest payments and monthly costs.

Frequently Asked Questions

What is the difference between fixed and variable rate mortgages?: A fixed-rate mortgage has the same interest rate for the entire loan term, while a variable-rate mortgage's rate can change based on market conditions. Fixed rates typically offer more stability in payments.
How does the amortization period affect my payments?: A longer amortization period (e.g., 30 years vs. 25 years) means lower monthly payments but more total interest paid. A shorter term means higher monthly payments but less total interest.
What are closing costs and how do they affect my mortgage?: Closing costs are fees charged by lenders and other parties at the time of closing, typically 2-5% of the loan amount. These costs are separate from the interest and principal payments shown in this calculator.
Can I pay extra toward my mortgage without penalty?: Yes, most mortgages allow prepayment without penalty. Paying extra principal can reduce your total interest costs and pay off the loan faster, though it may require refinancing later.
How do property taxes affect my mortgage payments?: Property taxes are typically paid separately from your mortgage and are based on the assessed value of your home. They are not included in this calculator but should be factored into your overall housing costs.