Amortization Calculator & Schedule (Canada)

Amortization is the total number of years it takes to pay a mortgage down to zero. Your term — usually three or five years — is just the length of the contract with one lender. At the end of each term you renew the remaining balance, and the amortization clock keeps running from wherever it left off.

Every payment is split between interest, calculated on the balance you still owe, and principal, which is what actually reduces the debt. Because interest is charged on a shrinking balance, the interest slice gets smaller and the principal slice gets larger with every single payment. That is why the early years feel slow and the last years fly by.

• Amortization = how long until the mortgage is gone (25 or 30 years is typical)
• Term = how long your current rate and contract last (usually 3 or 5 years)
• Insured mortgages (less than 20% down) are capped at 25 years, with a 30-year exception for first-time buyers of new construction
• Uninsured mortgages with 20% or more down can be amortized up to 30 years, and some lenders allow 35

Canadian fixed-rate mortgages are compounded semi-annually, not in advance, by law. American fixed mortgages compound monthly. On the same posted rate, the Canadian payment is slightly lower — about $18 a month less on a $500,000 mortgage at 5% over 25 years.

Variable-rate mortgages in Canada compound monthly, so a variable and a fixed quoted at the identical rate are not quite the identical cost. Any schedule you rely on for a real purchase should be built with semi-annual compounding for fixed rates, which is what this calculator does.

Because interest is charged on the balance, every dollar of prepayment removes not just that dollar of debt but all the future interest it would have carried. A single $10,000 lump sum in year two of a 25-year mortgage at 5% can save roughly $12,000 in interest and shave about a year off the amortization.

Most Canadian lenders allow a 15/15 or 20/20 privilege: prepay up to 15% or 20% of the original balance each calendar year, and increase your regular payment by up to 15% or 20%. Those privileges reset every January, so a lump sum paid on December 31 and another on January 1 use two years of room.

• Increase the regular payment — the most painless method, since the extra goes 100% to principal
• Switch to accelerated bi-weekly — adds one extra monthly payment per year without feeling like it
• Annual lump sums — the fastest way to use a bonus or tax refund
• Round up — paying $2,400 instead of $2,317 costs little and quietly compounds

A schedule lists every payment with the interest portion, the principal portion and the remaining balance. Two lines matter most. The first is the crossover point — the payment where principal finally exceeds interest. The second is your balance at the end of the term, because that is the figure you will renew or refinance.

Lenders use the end-of-term balance to work out your loan-to-value at renewal, which decides whether you can shop the whole market or are stuck with your existing lender. Building 20% equity by renewal opens up refinancing, a HELOC, and access to lenders that will not touch insured switches.

Every mortgage payment does two jobs at once: it pays the interest that accrued since the last payment, and whatever is left over reduces the balance you owe. Because interest is charged on the outstanding balance, the interest portion shrinks every single payment and the principal portion grows. That gradual shift is what an amortization schedule maps out.

The amortization period is the total time to reach a zero balance. The term is the length of your contract with a specific lender — usually five years in Canada. At the end of each term you renew the remaining balance, but the amortization clock keeps running from where it left off.

Canadian fixed-rate mortgages are compounded semi-annually, not in advance. The effective monthly rate is therefore i = (1 + annual rate / 2)^(2/12) − 1, and the payment is P × i / (1 − (1 + i)^−n), where P is the principal and n is the number of monthly payments.

Variable-rate mortgages in Canada normally compound monthly instead. The difference is small on any single payment but adds up over 25 years, which is why a Canadian calculator gives a different answer than a generic one.

Three levers shorten amortization, and all of them are visible in the schedule below.

• Accelerated payments — accelerated bi-weekly or weekly payments squeeze in one extra monthly payment every year without feeling like a big change.
• Annual lump sums — most Canadian lenders let you prepay 10–20% of the original principal each calendar year, penalty free. A lump sum applies entirely to principal.
• Payment increases — many lenders let you raise your regular payment by 10–20% once a year, and the increase is permanent unless you reset it.