How is it calculated?
We compare your current payment, your lender's renewal offer and the best bid, and total the difference over the new term.
What should I do with the result?
Use it to set a budget or a target rate, then let brokers and lenders bid on your actual mortgage. Bids include rate, penalty method, prepayment and fees, so you can compare the full cost.
Let a broker challenge your renewal offer
A licensed mortgage broker can compare your renewal letter against dozens of lenders in one bid, and on most prime renewals the lender pays the broker, so it costs you nothing. Why use a mortgage broker · Get broker and lender bids
MBWritten by the MortgageBids.ca editorial team. Last updated October 7, 2026. General information only; your lender confirms terms for your file.
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