Amortization is the process of gradually paying off a loan through regular payments that include both principal and interest. Each payment reduces your loan balance a little more, and over time, you pay less in interest and more toward the principal. Understanding amortization helps you see how long it will take to pay off your loan and how much interest you’ll pay along the way.
Most loans in Canada, such as mortgages, car loans, and personal loans, are amortized. That means your payments are spread evenly over a set period, called the amortization period. Each payment covers two parts: interest (the cost of borrowing) and principal (the amount you actually borrowed).
At the start of a loan, a larger portion of each payment goes toward interest because your balance is still high. As time passes, more of each payment goes toward the principal. This shift is what makes amortization predictable and manageable for borrowers.
Many people confuse the amortization period with the loan term. They are related but not the same. The amortization period is the total time it would take to pay off the loan completely, while the term is the period your current rate and contract apply for.
For example, a mortgage in Canada might have a 25-year amortization and a 5-year term. After the term ends, you’ll renew your mortgage at a new rate and continue paying until the full amortization period is complete.
Here’s a simple example showing how payments are divided between principal and interest on a $300,000 mortgage at 5% interest over 25 years.
| Payment # | Principal Paid | Interest Paid | Total Payment | Remaining Balance |
|---|---|---|---|---|
| 1 | $395 | $1,250 | $1,645 | $299,605 |
| 12 | $420 | $1,225 | $1,645 | $294,460 |
| 60 | $540 | $1,105 | $1,645 | $268,800 |
| 120 | $700 | $945 | $1,645 | $220,000 |
As you can see, the amount paid toward interest decreases each year while the portion applied to principal increases. By the end of the amortization period, nearly your entire payment goes toward principal.
Choosing a shorter amortization period means higher monthly payments but much less interest paid over time. A longer amortization makes your payments smaller but increases your total interest cost.
Here’s an example for a $400,000 mortgage at 5% interest:
| Amortization Period | Monthly Payment | Total Interest Paid |
|---|---|---|
| 20 years | $2,639 | $233,000 |
| 25 years | $2,326 | $297,000 |
| 30 years | $2,147 | $373,000 |
As shown, extending your amortization from 20 to 30 years reduces your monthly payment by almost $500 but adds about $140,000 in total interest. Finding the right balance depends on your budget and long-term financial goals.
The amortization formula can be complex, but you can estimate payments easily using online tools. To see how much of each payment goes to interest and principal, try these calculators:
Understanding amortization helps you plan your finances, compare loan options, and make smarter borrowing decisions.
Amortization means spreading out your loan payments over time so each one covers both interest and principal. It’s how most loans and mortgages in Canada are structured.
No. Amortization is the overall process of paying off your loan, while interest is the cost of borrowing. Each payment includes some of both.
You can shorten your amortization by making extra payments, increasing your payment amount, or choosing an accelerated bi-weekly schedule. Even small additional payments can save you thousands in interest.