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Mortgage math

Amortization

The length of time over which your mortgage is fully paid off. Canadian conventional limits: 25 years for insured, up to 30 for uninsured (or 30 for first-time buyers on new construction). Longer amortization = lower payment but more lifetime interest.

Amortization is the total payoff runway; your term (1–5 years) is just the current contract within it. A 25-year amortization typically spans five or six separate terms, each renewed at a new rate, before the balance hits zero.

Stretching to 30 years lowers the monthly payment and can be the difference between qualifying and not — but it adds tens of thousands in lifetime interest. The middle path many borrowers use is a longer amortization for qualifying comfort, then accelerated or lump-sum prepayments to shorten it in practice.

Our payment and affordability calculators let you flex the amortization and see the trade-off between monthly cash flow and total interest instantly.

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