Ontario Mortage Calculator

Use this Ontario mortgage calculator to estimate your monthly payments, total interest costs, and amortization schedule for a home loan in Ontario. The calculator accounts for Ontario's property transfer tax and mortgage insurance requirements.

How to Use This Calculator

Enter the following information to calculate your Ontario mortgage:

Purchase price of the home
Down payment amount or percentage
Mortgage term in years
Interest rate (fixed or variable)
Amortization period (typically 25 or 30 years)

Click "Calculate" to see your estimated monthly payment, total interest paid, and amortization breakdown. The calculator will also show Ontario-specific costs like property transfer tax and mortgage insurance.

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 (Purchase price - Down payment)
i = Monthly interest rate (Annual rate / 12 / 100)
n = Number of payments (Amortization period × 12)

The calculator also includes Ontario-specific calculations for property transfer tax and mortgage insurance when applicable.

Worked Example

Let's calculate a mortgage for a $500,000 home with a 20% down payment, 5% interest rate, and 25-year amortization:

Down payment: $500,000 × 20% = $100,000
Principal: $500,000 - $100,000 = $400,000
Monthly rate: 5% / 12 = 0.4167%
Number of payments: 25 × 12 = 300
Monthly payment: $400,000 [0.004167(1 + 0.004167)³⁰⁰] / [(1 + 0.004167)³⁰⁰ - 1] ≈ $2,440.72

Total interest paid over 25 years: $2,440.72 × 300 - $400,000 ≈ $134,254

Note: This example doesn't include Ontario property transfer tax or mortgage insurance costs, which would increase the total cost.

Ontario Mortgage Requirements

Ontario has specific requirements for home buyers:

Minimum down payment: 5% for conventional mortgages, 10% for first-time buyers
Property transfer tax: 1% on the first $200,000, 1.5% on the next $200,000, 2% on the next $500,000, and 2.5% on amounts over $900,000
Mortgage insurance: Required for down payments under 20% (CMHC insurance)
Strata fees: Additional costs for condominiums and townhouses

The calculator includes these Ontario-specific costs in its estimates.

Comparison of Mortgage Terms

Term	Interest Rate	Monthly Payment	Total Interest
5 years	5.00%	$3,200.00	$120,000.00
10 years	5.00%	$2,800.00	$100,000.00
15 years	5.00%	$2,500.00	$80,000.00
20 years	5.00%	$2,300.00	$70,000.00
25 years	5.00%	$2,200.00	$60,000.00

This table shows how different mortgage terms affect your monthly payments and total interest costs for a $400,000 loan at 5% interest.

Frequently Asked Questions

How accurate is this Ontario mortgage calculator?: This calculator provides estimates based on standard mortgage formulas and Ontario-specific costs. For precise figures, consult with a mortgage broker or financial institution.
Does this calculator include Ontario property transfer tax?: Yes, the calculator estimates Ontario property transfer tax based on the home's purchase price.
What is mortgage insurance in Ontario?: Mortgage insurance (CMHC insurance) is required for down payments under 20%. It protects the lender if you default on your mortgage.
Can I use this calculator for condominiums or townhouses?: Yes, but you should also account for additional costs like strata fees and condo fees when budgeting.
How often should I update my mortgage calculations?: Review your mortgage calculations annually or when your interest rates change, as financial conditions can affect your payments.