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Amortization is the total length of time it will take to pay off a mortgage in full through regular payments, assuming the rate and payment stay unchanged. For insured mortgages, federal rules cap it at 25 years, extendable to 30 years only for eligible first-time buyers and buyers of new builds.
Amortization is the payoff horizon; it’s a different number from the mortgage term, which is just the length of the current rate agreement. A longer amortization spreads payments out further, lowering the regular payment but increasing the total interest paid over the life of the loan; a shorter amortization does the opposite.
Borrowers don’t only shorten amortization by choosing a shorter schedule up front — switching to an accelerated payment frequency can shave years off the effective amortization without changing the rate at all, simply by directing more money to principal sooner.
Total number of payments = Amortization (years) × Payments per year
Insured cap: an insured mortgage is capped at 25 years standard, extendable to 30 years only for insured first-time buyers and buyers of new builds, under the December 2024 federal mortgage reforms.
Uninsured flexibility: conventional (uninsured) mortgages can run longer than the insured cap; the maximum offered varies by individual lender policy.
It doesn't reset automatically: amortization keeps counting down at each renewal or switch unless the mortgage is refinanced to deliberately extend it.
Payment frequency shortens it: an accelerated payment schedule reduces the effective amortization without altering the rate — see payment frequency.
A borrower has a $450,000 insured mortgage on a 25-year amortization with a monthly payment of $2,300:
$2,300 × 300 = $690,000 total paid; $690,000 − $450,000 = $240,000 interest. This example uses a hypothetical payment amount to isolate the mechanics of amortization — it does not reflect any current mortgage rate. Extending to a 30-year amortization (available to some insured first-time buyers and new-build buyers) would lower the monthly payment but increase total interest paid over time.
Definitions reflect Canadian federal and provincial rules as of the “Updated” date above. Not advice for any specific file.
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