HELOC & the Smith Manoeuvre

If you have built up equity in your home, a home equity line of credit (HELOC) can give you flexible, low-cost access to that money. Used well, it funds renovations, bridges timing gaps, or — through a strategy called the Smith Manoeuvre — helps make some of your borrowing tax-efficient. Used carelessly, it adds risk and leverage to the roof over your head.

This guide explains how a HELOC actually works in Canada, the rules that limit how much you can borrow, and what the Smith Manoeuvre is in plain language. We will be balanced about the upside and honest about the risk, because this is one of the more powerful — and most misunderstood — tools in personal finance.

Read it through before you decide anything. The right move depends on your income, your risk tolerance, and your tax situation, and a couple of those questions are best answered with a professional.

A HELOC is a revolving line of credit secured by your home. Unlike a regular mortgage with a fixed payment schedule, it works more like a large credit card tied to your property: you can draw on it, repay, and draw again, up to your approved limit. You only pay interest on what you have actually borrowed.

How much you can access is governed by your home's value and a rule called loan-to-value (LTV). A standalone HELOC — a line of credit on its own, with no traditional mortgage attached — is capped at 65% of your home's value.

When a HELOC is combined with a mortgage in a single product (a re-advanceable mortgage, covered next), the total borrowing can reach 80% of your home's value — but the revolving HELOC portion still stays capped at 65%. In other words, the amortizing mortgage can fill the gap between 65% and 80%, but the line-of-credit piece never exceeds 65% on its own.

HELOCs are variable-rate products, tied to your lender's prime rate, so the cost moves up and down as prime changes. That flexibility is a feature, but it also means your interest cost is not fixed.

A re-advanceable mortgage bundles a regular amortizing mortgage and a HELOC into one registered product. The clever part is the link between them: as you pay down the principal on the mortgage portion, your available HELOC limit automatically increases by the same amount.

So every principal payment does two things at once — it shrinks your mortgage and it frees up an equal amount of re-advanceable credit. This automatic re-advancing is what makes the product the engine behind the Smith Manoeuvre.

The combined product still respects the LTV rules: total borrowing up to 80% of value, with the revolving HELOC component capped at 65%. Not every lender offers a true re-advanceable mortgage, and the terms vary, so it is worth comparing options. We can help you sort through which lenders offer it and on what terms — reach out here.

One of the defining features of a HELOC is that it allows interest-only payments. Your required minimum each month is just the interest on the outstanding balance — you are not obligated to pay down any principal.

That keeps minimum payments low and cashflow flexible, which can be genuinely useful. But it also means the balance does not shrink on its own. If you only ever make the minimum, you could carry that debt indefinitely, and because the rate is variable, your payment rises whenever prime rises.

A traditional mortgage is the opposite: each payment includes both interest and principal, so the balance steadily falls and the debt has a defined end date. Many homeowners use both deliberately — the disciplined, amortizing mortgage for the bulk of their borrowing, and the interest-only HELOC for flexibility or strategy. The key is to treat interest-only as a choice you are making on purpose, not a default you drift into.

The Smith Manoeuvre is a Canadian strategy that uses a re-advanceable mortgage to borrow to invest, with the goal of making the interest on that borrowing potentially tax-deductible. In Canada, interest on money borrowed to earn investment income is generally deductible, while interest on your regular home mortgage is not. The strategy aims to gradually convert non-deductible mortgage interest into deductible investment-loan interest.

In simplified terms, it works like this:

• Set up a re-advanceable mortgage that links an amortizing mortgage to a HELOC.
• Make your regular mortgage payment. Each payment reduces the mortgage principal and, in turn, increases your available HELOC credit by the same amount.
• Borrow the newly available HELOC room and invest it in income-producing investments held outside a registered account.
• Track the investment-loan interest, because interest on money borrowed to earn investment income may be tax-deductible (confirm with a tax professional).
• Apply any resulting tax refund back against your mortgage to accelerate the process, then repeat.

Over time, the goal is that your non-deductible mortgage shrinks while a deductible investment loan grows alongside an investment portfolio. It is a long-term, disciplined strategy — not a quick win — and it depends entirely on doing each step correctly.

The appeal of the Smith Manoeuvre is real, but so is the risk, and it is important to see both clearly. This strategy adds leverage and market risk. You are borrowing against your home to invest, which means a market downturn can leave you owing money on investments that have fallen in value, while still carrying the debt.

Because the HELOC is variable-rate, your borrowing cost also rises if prime rates increase, which can erode or wipe out the expected benefit. The tax deductibility is not automatic either — it depends on how the borrowing is structured and used, and the rules must be followed precisely for interest to qualify.

For all of those reasons, the Smith Manoeuvre is not for everyone. It tends to suit homeowners with stable income, a long time horizon, genuine tolerance for market swings, and the discipline to manage it for years. Before starting, get professional tax advice from an accountant and, where appropriate, an investment advisor — the deductibility and suitability questions are squarely their domain, not something to take on a forum's word.

A HELOC is flexible, which is exactly why it can be misused. It is usually the wrong tool when it is used to fund ongoing lifestyle spending — covering monthly shortfalls, vacations, or everyday costs you cannot otherwise afford. Borrowing against your home to plug a cashflow gap tends to delay a problem rather than solve it.

It is also a poor fit if a variable, interest-only balance would tempt you to carry debt indefinitely without a repayment plan, or if your income is unstable enough that a rate increase could strain your budget. And the Smith Manoeuvre specifically is the wrong tool for anyone who would lose sleep over watching leveraged investments drop in a down market.

Used with a clear purpose and a plan, though, home equity can be one of the most cost-effective sources of borrowing available to you. If you want help deciding whether a HELOC, a re-advanceable mortgage, or neither fits your situation, we are happy to walk through the numbers with you — start your application or get in touch and we will give you a straight answer.

Risk note: A HELOC and the Smith Manoeuvre involve borrowing secured by your home and, in the case of the Smith Manoeuvre, investing with borrowed money. Both carry real risk, including market losses and rising variable rates, and neither is suitable for everyone. Nothing here is tax or investment advice; confirm your situation with a qualified tax professional before acting.