Mortgage calculator

Break or keep a mortgage calculator

Compare estimated interest, payments, remaining balances, penalty, and transaction costs over the same period.

Reviewed August 31, 2026Published by Ontario Mortgage HelpCalculation standard
Estimated additional cost$1,376Interest difference over 24 months after entered penalty and costs.
Current monthly payment
$3,251
Proposed monthly payment
$2,908
Current interest
$53,106
Proposed interest + costs
$54,482
Current balance after period
$475,073
Proposed balance after period
$471,181
Estimated interest break-even
27 months

Assumes the same starting balance, remaining amortization, monthly payments, and unchanged rates. It excludes qualification, cashback repayment, tax effects, portability, and any costs not entered.

How to use this estimate

Use current documents.Enter figures from the mortgage statement, renewal offer, payout quote, appraisal, or commitment where possible.

Compare like with like.Use the same balance, time period, and payment frequency when comparing alternatives.

Check the actual terms.Qualification, fees, compounding, privileges, and lender calculations may produce different results.

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