What Is the Smith Manoeuvre?

The Smith Manoeuvre is a Canadian strategy, popularized by Fraser Smith, that gradually converts your non-deductible mortgage interest into tax-deductible investment-loan interest — without increasing your total debt. As you pay down your mortgage principal, a re-advanceable home equity line of credit (HELOC) frees up the same amount of credit. You borrow that credit back and invest it in income-producing investments, which (under CRA rules) makes the interest on the borrowed money tax-deductible.

How It Works, Step by Step

• Set up a re-advanceable mortgage. This is a mortgage bundled with a HELOC whose available limit automatically increases as you pay down principal.
• Make your normal mortgage payment. Each payment reduces non-deductible mortgage debt and opens up an equal amount of HELOC room.
• Re-borrow and invest. Draw the newly available HELOC credit and invest it in income-producing assets (e.g., dividend-paying stocks or funds held in a non-registered account).
• Deduct the interest. Because the borrowed funds are used to earn investment income, the HELOC interest is generally tax-deductible.
• Recycle the refund. Apply your annual tax refund (and often the investment dividends) back against the mortgage principal to speed up the conversion.

Over time, your non-deductible mortgage shrinks while a deductible investment loan grows to replace it — a "debt swap" that leaves your total borrowing roughly unchanged but makes more of your interest deductible.

Basic vs Accelerated

Key Rules and Risks

• CRA interest-deductibility test: interest is only deductible when the borrowed money is used to earn income from a business or property. Keep the investment loan strictly separate from personal spending, and keep records — mixing funds can disqualify the deduction.
• You need a re-advanceable mortgage. A plain mortgage without a linked, auto-increasing HELOC won't work.
• Leverage cuts both ways. You are borrowing to invest. Gains are amplified, but so are losses — and you owe the HELOC interest regardless of how the investments perform.
• Interest-rate risk: HELOC rates are variable. Rising rates increase your carrying cost and shrink the net benefit.
• Discipline required: the strategy only works if you consistently re-borrow, invest, and recycle refunds over many years.
• The dividend tax credit matters: eligible Canadian dividends receive preferential tax treatment, which this calculator models alongside the interest deduction to estimate your true after-tax outcome.

This is an educational model, not financial or tax advice. The Smith Manoeuvre is an advanced, higher-risk strategy — consult a fee-only advisor and a tax professional before starting.