Timing decides
the price.

Three things happen at once when a mortgage is converted mid-term, and each one can independently sink the case:

1. The existing mortgage is broken. The Financial Consumer Agency of Canada lists what may be payable: a prepayment penalty, plus administration fees, appraisal fees, reinvestment fees and a mortgage discharge fee, with any cash back received at origination repayable. On a closed mortgage the penalty alone can run to thousands.
2. The borrower requalifies. Current income, current debts, current qualifying rules. Income that supported the original approval does not carry forward, which matters for anyone whose circumstances have changed since.
3. A new charge is registered. Legal and registration costs attach to the new structure. Some lenders cover these on a switch; many do not on a refinance.

When is it still worth it? When the conversion is doing something a renewal cannot wait for — consolidating debt that is compounding faster than the penalty, funding a purchase with a real deadline, or fixing a structure that is actively costing money. When the only reason is that a readvanceable mortgage sounds like a good idea, waiting for maturity is almost always the better answer.

Sources: FCAC — Breaking your mortgage contract · FCAC — Mortgage fees: prepayment penalties

This is why renewal planning matters more than most homeowners give it credit for. Maturity is the one moment when changing the structure costs nothing extra — and it arrives on a known date, years in advance. A renewal letter signed on autopilot spends that moment without noticing it was there.

One warning worth repeating: the useful figure is the total, not the headline. A lender advertising no product fee may still leave legal and registration costs with the borrower, and a lender covering legal costs may charge elsewhere. Ask for every line, in writing, before anything is registered. That request is entirely normal and no reasonable lender resents it.

Source: Financial Consumer Agency of Canada — Breaking your mortgage contract

Three consequences follow, and none of them is a reason to avoid the structure — only reasons to go in with open eyes:

• Shopping happens before signing, not after. The cost of moving is highest once the collateral charge is in place, so the comparison between lenders is worth doing properly at the outset.
• The renewal offer deserves the same scrutiny as any other. A slightly higher renewal rate from the incumbent can still beat a lower rate elsewhere once switching costs are counted — or it can not. It is arithmetic, and it is worth doing rather than assuming.
• Some lenders cover switch costs. Whether they do changes the answer materially. Ask.

A collateral charge also usually registers for more than the current mortgage amount, which is precisely what makes the re-advance possible without new registration each time. The same feature that gives the structure its flexibility is the one that makes leaving marginally more involved. That trade is the whole product in one sentence.

The Financial Consumer Agency of Canada’s guide to home equity lines of credit covers the general behaviour of these credit lines, including a lender’s ability to change or demand repayment. The renewal guide covers the timing.

For a self-employed applicant, verifiable income usually means two years of filed tax returns with the notices of assessment, and business financial statements where the income comes through a corporation. The number the lender works from is net income after expenses — which is where a great many self-employed borrowers discover that a well-optimized tax return and a strong mortgage application are pulling in opposite directions.

That tension is not a reason to stop claiming legitimate expenses. It is a reason to know, before filing, what the return will look like to an underwriter two years from now. Mike spent more than 25 years in the tax business before becoming a mortgage agent, which is why that conversation happens here at all — and why it happens well before an application, not during one.

One practical note: because a readvanceable structure cannot be default-insured, the equity requirement is real and non-negotiable. A self-employed borrower with 10 per cent down is not being turned away for being self-employed; the product simply does not exist below 20 per cent equity for anyone.

Two points that catch homeowners by surprise:

• Porting the mortgage does not necessarily port the structure. A mortgage may be portable to a new property while the readvanceable arrangement has to be re-established, sometimes on different terms. Ask the lender about the credit line specifically, by name, rather than assuming it travels with the mortgage.
• A drawn balance reduces net proceeds. Obvious written down, less obvious after several years of drawing on a line that felt separate from the mortgage. Both are debts against the same house and both are settled on the same day.

Where borrowed money from the line was used for an income-earning purpose, the sale is also a tax event worth raising with your accountant before closing rather than after. What happens to that borrowing, and to any deduction attached to it, depends on what happens to the money — the current-use principle set out on the interest deductibility page. That conversation belongs with your tax professional, and it is much cheaper to have in advance.