Amortization Calculator Ontario
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Reviewed by Calculator Editorial Team
An amortization calculator for Ontario helps you understand your mortgage payment schedule, interest costs, and payoff timeline. This tool applies Ontario-specific mortgage rules and interest rates to provide accurate calculations.
What is Amortization?
Amortization is the process of paying off a loan or mortgage in regular installments over time. Each payment includes both principal and interest, gradually reducing the outstanding balance until the loan is fully paid.
In Ontario, amortization schedules are typically calculated using the Canadian Mortgage and Housing Corporation (CMHC) guidelines, which consider factors like interest rates, amortization periods, and payment frequencies.
Key Terms
- Principal - The original loan amount
- Interest - The cost of borrowing, calculated as a percentage of the remaining balance
- Amortization Period - The total length of time to pay off the loan (typically 25 or 30 years)
- Payment Frequency - How often payments are made (monthly, bi-weekly, etc.)
How to Use This Calculator
- Enter your loan amount (the total mortgage amount)
- Select your interest rate (current prime rate plus your mortgage rate)
- Choose your amortization period (typically 25 or 30 years)
- Select your payment frequency (monthly, bi-weekly, etc.)
- Click Calculate to see your payment schedule and total interest paid
The calculator will display your monthly payment, total interest paid over the loan term, and a breakdown of your payment schedule.
Amortization Formula
The standard amortization formula for calculating monthly payments is:
Monthly Payment Formula
M = P [i(1 + i)n] / [(1 + i)n - 1]
- M = Monthly payment
- P = Principal loan amount
- i = Monthly interest rate (annual rate divided by 12)
- n = Number of payments (amortization period × 12)
For bi-weekly payments, the formula adjusts to account for 26 payments per year instead of 12.
Worked Example
Let's calculate a mortgage payment for a $300,000 loan with a 5% annual interest rate over 25 years:
| Input | Value |
|---|---|
| Loan Amount | $300,000 |
| Interest Rate | 5.00% |
| Amortization Period | 25 years |
| Payment Frequency | Monthly |
Using the formula:
- Convert annual rate to monthly: 5% ÷ 12 = 0.4167% or 0.004167
- Calculate number of payments: 25 × 12 = 300
- Plug values into formula: M = 300,000 [0.004167(1 + 0.004167)300] / [(1 + 0.004167)300 - 1]
- Calculate: M ≈ $1,880.49 per month
Total interest paid over 25 years: $455,347.40
Frequently Asked Questions
- What is the difference between amortization and interest-only payments?
- Amortization payments include both principal and interest, gradually reducing the loan balance. Interest-only payments only cover the interest, leaving the principal unchanged until the end of the term.
- How does the amortization period affect my payments?
- A longer amortization period means lower monthly payments but more total interest paid. A shorter period results in higher monthly payments but less total interest.
- Can I change my amortization period after taking out a mortgage?
- Yes, but it typically requires refinancing and may have fees or penalties. Some lenders offer amortization period changes without refinancing.
- What is the difference between fixed and variable rate amortization?
- Fixed rate amortization keeps the interest rate constant throughout the loan term. Variable rate amortization adjusts with market rates, which can change your payments over time.