Mortgage Prepayment Calculator

What is an extra $200 a month — or one lump sum — actually worth? See the interest you save, the time cut off your mortgage, and your new mortgage-free date, using the same Canadian payment engine as the rest of this site.

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Most Canadian mortgages allow prepayments of 10–20% of the original balance per year plus payment increases — going beyond your privilege can trigger a penalty. Check your mortgage terms; this calculator just does the math.

What your prepayments buy you

$0 of interest saved
Regular payment$0
Time to mortgage-free — no prepayments—
Time to mortgage-free — with prepayments—
Time saved—
Mortgage-free date — no prepayments—
Mortgage-free date — with prepayments—
Total interest — no prepayments$0
Total interest — with prepayments$0

Why prepayments punch above their weight

Every prepaid dollar comes straight off the principal, so it stops attracting interest for the entire remaining life of the mortgage. A dollar prepaid in year 2 of a 25-year mortgage at 4.49% avoids roughly $1.45 of interest by payoff — early money works hardest.

Lump sums today beat the same money spread out later, and extra monthly payments quietly shorten your amortization without refinancing. Dates above are estimates projected from today at a constant rate — in real life your rate changes at each renewal, so treat the mortgage-free date as a target, not a promise.

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