Readvanceable or standard: when the HELOC is built in from day one.

A readvanceable mortgage combines a traditional amortizing mortgage and a home equity line of credit under one collateral charge registered against the property. A standard mortgage is registered on its own, and if a client later wants a HELOC, it's typically a separate application, usually registered secondary to the existing mortgage on the same property.

The single collateral charge is what makes a readvanceable structure genuinely different, not just a marketing label on a bundled product. Because both the mortgage and the line of credit are registered under one charge, the lender only needs to register once, at closing, for the full combined limit — where a standard mortgage plus a separately added HELOC involves two registrations, potentially at two different points in time, and two sets of legal fees.

As the client makes mortgage payments and the amortizing portion's principal goes down, the HELOC portion's available credit limit increases by the same amount automatically — the paid-down equity becomes reborrowable right away, without a new application or a re-registration each time. A standard HELOC added separately to a mortgage usually needs its own application to raise the limit later, rather than growing on its own.

This is the mechanism behind strategies like the Smith Manoeuvre, where a client reborrows the growing HELOC portion to make investments, converting what would otherwise be non-deductible mortgage interest into deductible investment-loan interest over time. It's a legitimate strategy for the right client, but it also means a readvanceable structure can end up carrying meaningfully more total debt against the home than a standard amortizing mortgage would, even though the payment on the mortgage portion alone looks the same.

Clients running a debt-consolidation strategy, an investment strategy that reborrows paid-down equity, or self-employed clients who want flexible access to home equity for business cash flow tend to be the ones a readvanceable structure genuinely serves. A client who just wants a straightforward, amortizing mortgage with no intention of reborrowing equity along the way generally doesn't need the added complexity — and the standing, growing credit line can be a real temptation to spend for a client who isn't disciplined about using it.

A useful screening question for a broker is simply whether the client can describe what they'd actually use the growing credit limit for. A client with a concrete answer — funding a rental property down payment, consolidating higher-interest debt, covering irregular business cash flow — is generally a good fit. A client who just likes the idea of having more available credit, without a specific plan, is the profile most likely to turn a useful feature into an expensive habit.

This is also a conversation that overlaps with bridge financing vs. HELOC planning — a client who already has a readvanceable structure in place has standing access to equity that a client with a standard mortgage would need to arrange separately.

No — whether it's part of a readvanceable structure or added separately to a standard mortgage, the HELOC portion is a variable, revolving line of credit priced off prime, without the fixed rate or fixed term the amortizing mortgage portion can carry. Renewing or switching lenders on the mortgage portion doesn't necessarily move as cleanly when a HELOC is bundled into the same collateral charge — worth confirming with the client before recommending the structure, particularly if switching lenders at renewal is part of the client's plan.

That collateral-charge structure is also why a straightforward lender switch at renewal can be more involved for a readvanceable mortgage than for a standard one: a new lender typically has to register its own collateral charge for the combined limit, which can mean full legal and appraisal costs similar to a new mortgage, rather than the lighter switch process available on a standard mortgage with no HELOC attached. A client planning to shop lenders aggressively at every renewal should factor that friction into the decision, not just the day-one flexibility.