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A convertible mortgage is a short closed term — often six months to a year — that lets the borrower convert into a longer fixed-rate term with the same lender before it matures, without paying the full prepayment penalty.
A convertible mortgage works like an option: the borrower locks in a short term, then has the right to convert into one of the lender’s longer fixed-rate terms before the short term ends, usually without the penalty that would normally apply to breaking a closed mortgage.
It’s often used by borrowers who expect rates to move, or who aren’t ready to commit to a long fixed-rate mortgage but want the option to lock in later without shopping the whole deal again. Unlike a fully open mortgage, the flexibility here is limited to converting term length with the same lender, not prepaying the balance freely.
Lender-specific mechanics: conversion windows, eligible target terms, and notice requirements vary by lender — confirm the specifics of a given product before promising a client an outcome.
Usually stays with the same lender: converting is typically only available within the originating lender’s own term lineup, not a switch to a different lender.
Rate is set at conversion, not origination: the client locks into whatever rate the lender is offering on the new term at the time of conversion, not the rate available when the short term began.
A middle ground: positioned between a fully open mortgage and a standard closed term — more flexible than the latter, cheaper than the former.
Definitions reflect Canadian federal and provincial rules as of the “Updated” date above. Not advice for any specific file.
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