Readvanceable Mortgages

FCAC describes a HELOC combined with a mortgage as a product in which available revolving credit can increase as mortgage principal is repaid. OSFI calls the broader structure a combined loan plan (CLP) when multiple segments share one collateral charge, their authorized limits depend on one another and the plan is underwritten under an overall limit.

The homeowner may see several sub-accounts—fixed mortgage segments, variable mortgage segments and a revolving line—but they are linked by one property and an overall secured-credit structure.

In a typical readvanceable structure, paying down the amortizing mortgage reduces one balance and may increase the amount available in the revolving segment, subject to the plan terms and regulatory limits. That can be convenient for renovations, investment or liquidity because a new legal registration may not be required for each permitted draw.

The accounting consequence is important: a $1,000 reduction in mortgage principal may improve net home equity by $1,000 only if that newly available credit remains unused. If the homeowner redraws the $1,000, secured debt returns to the previous level even though the mortgage statement shows principal repayment.

For a combined loan plan at a federally regulated financial institution, OSFI requires lending above 65% LTV to be amortizing and non-readvanceable. As principal is repaid on the portion above 65%, the overall authorized limit must decline until the combined authorized limit reaches 65% LTV. Readvancing credit above that threshold is not consistent with OSFI’s FRFI expectation. This is not a universal cap on private secured lines or private HELOC-style products; a private lender may establish a different maximum LTV or CLTV and its facility may have different redraw mechanics.

This is a structural brake on persistent secured debt. The combined plan can still have total lending up to the 80% uninsured ceiling, but the top portion is designed to shrink rather than regenerate as revolving credit.

Consider a $1,000,000 home with a $500,000 mortgage balance and a HELOC limit of $150,000, of which $80,000 is drawn. Current secured balances total $580,000, or 58% LTV. But the borrower can increase debt to $650,000 without another mortgage application if the full line remains available, creating 65% authorized exposure.

That gap between current balance and authorized exposure matters when measuring future borrowing capacity, deciding whether another lender can take a second position, or planning a transfer. It also matters behaviourally because the homeowner has immediate access to debt that has already been approved.

Readvanceable mortgages are commonly secured by a collateral charge that can support several debts with the same lender. FCAC notes that a collateral charge may be registered above the initial mortgage amount, which can reduce the need for a new registration when additional credit is later approved.

But a homeowner changing lenders may need the combined structure paid out, closed and legally discharged rather than simply transferring one plain mortgage charge. Other debts secured by the same collateral agreement can also matter. The flexibility gained during ownership can therefore create more work at exit.

A normal amortizing mortgage makes deleveraging automatic: each scheduled principal payment permanently reduces debt unless the borrower completes a new borrowing transaction. A readvanceable mortgage can make that reduction reversible because paid principal may reappear as accessible credit.

This creates what can be called deleveraging leakage: the homeowner appears to be paying down the mortgage while total secured debt remains flat because new HELOC draws replace the principal that was repaid. Wealth accumulation then depends more heavily on property appreciation rather than debt reduction.

Some homeowners use readvanceable credit for investing or business purposes. That can create a potentially traceable borrowing purpose for tax analysis, but interest deductibility depends on tax law and the actual use and tracing of funds—not merely on the fact that the loan is secured by a home.

Leveraged investing also means the homeowner can lose investment value while still owing the full secured debt. Tax treatment and investment suitability should therefore be reviewed separately with appropriate professionals rather than assumed from a mortgage structure.

A durable plan can separate purposes into distinct sub-accounts where the lender permits it, cap the amount drawn for each purpose, and assign a repayment schedule even when the product does not demand one. This makes it possible to distinguish renovation debt, investment debt and emergency borrowing instead of blending them into one permanent balance.

A useful metric is net secured debt reduction over 12 months: mortgage principal repaid minus new revolving draws. If that number is zero or negative despite regular mortgage payments, the household is not actually deleveraging.

The structure can be useful for homeowners who genuinely benefit from recurring access to equity and can manage revolving debt deliberately. It may be less suitable for borrowers who want forced principal reduction, are prone to re-borrowing, expect to switch lenders soon, or do not need ongoing access after the initial financing event.

The decision should therefore compare not only rate and limit, but also behavioural fit, discharge/switching friction, future borrowing plans and whether permanent mortgage reduction is a financial priority.