🇨🇦 Built for Canadian Homeowners

Turn Your Mortgage Into
a Wealth-Building Machine

The Smith Manoeuvre lets you convert non-deductible mortgage interest into tax-deductible investment debt — legally, automatically, every month. This free calculator shows you exactly how it works for your situation.

Try the Calculator Free → Learn How It Works

Example Scenario

SM portfolio after 25 yrs

vs. No Strategy

Net wealth advantage

Tax Refunds Earned

CRA interest deduction savings

The Strategy

How the Smith Manoeuvre Works

A four-step cycle that runs automatically each month, quietly compounding your wealth while you pay down your home.

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Make Your Mortgage Payment

Each month's payment chips away at your principal balance, creating room in your HELOC — dollar for dollar.

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Re-borrow via HELOC

Draw the newly freed HELOC room and invest it in a diversified, income-producing portfolio.

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Claim the Tax Deduction

Because the HELOC is used for investing, the interest becomes tax-deductible under CRA rules. Claim it each April.

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Reinvest the Refund

Use your tax refund to invest further or pay down the mortgage faster — accelerating the whole cycle.

What's Inside

Everything in One Calculator

No sign-up, no paywall. Built by a personal finance enthusiast who wanted a tool that actually models the full picture.

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HELOC Kickstart Amount

Already have existing HELOC room? Model an initial lump-sum investment at strategy launch and watch it compound over your full amortization.

e.g. $300,000 initial draw

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Monthly & Annual Prepayments

Add extra monthly prepayments and an annual lump-sum (bonus, tax refund, inheritance) to see how aggressively you can shrink your timeline.

Monthly + Annual Lump-Sum

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Rate Renewal Simulation

Model multiple rate renewals over your amortization period. See exactly how a rate change at year 5 or 10 reshapes your payoff date and net worth.

Multi-segment rate schedule

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Home Value & Total Net Worth

Set your current home value and appreciation rate. The calculator adds growing home equity to your investment portfolio for a true total wealth picture.

Home equity included

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Side-by-Side Comparison

Every result shows both the SM scenario and a no-strategy baseline so you can see the real dollar difference the strategy makes over time.

SM vs No-SM charts

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CRA Tax Refund Modelling

Enter your marginal tax rate and the calculator applies the annual HELOC interest deduction, optionally reinvesting the refund for compounding.

Marginal rate × HELOC interest

Example Output

What the Numbers Look Like

A typical Canadian scenario — $500K mortgage, $750K home, 25-year amortization, with a $300K HELOC kickstart and $500/mo prepayment.

// Assumptions: $500K mortgage · 5.5% rate · 7% investment return · 43% marginal tax · $300K HELOC kickstart · $500/mo prepayment

Payoff Timeline

17.4 yrs

vs. 25 yrs — 7.6 years early

Final Portfolio

$2.1M+

Investment portfolio at payoff

Total Net Worth

$3.4M+

Portfolio + home equity

Tax Refunds

$180K+

CRA interest deductions

⚠️ Illustrative only. Actual results depend on market returns, interest rates, and individual tax situations. Always consult a licensed financial advisor and tax professional before implementing this strategy.

Run Your Own Numbers →

Free · No sign-up · Instant results

Common Questions

FAQ

Yes. The Smith Manoeuvre is a completely legal Canadian tax strategy, first described by Fraser Smith in his 2002 book. It leverages the CRA's existing rule that interest on money borrowed for investment purposes is tax-deductible. It is not a loophole — it is using the tax code exactly as intended.

Yes, a readvanceable mortgage (one that includes a HELOC that automatically re-opens as you pay down principal) is the cornerstone of the Smith Manoeuvre. Products like the Manulife One, Scotia Total Equity Plan, or TD FlexLine are commonly used. Your lender can advise on what's available.

The Canadian stock market (TSX) has returned roughly 7–9% annually over long periods before inflation. A commonly used conservative assumption is 6–7% for a diversified Canadian equity or dividend portfolio. Remember: returns are never guaranteed, so it's wise to run the calculator at multiple return rates (e.g. 5%, 7%, 9%) to understand the range of outcomes.

The primary risk is sequence-of-returns risk: if markets decline significantly early in the strategy, your HELOC balance may exceed your portfolio value for an extended period. You are using leverage, which amplifies both gains and losses. Rising interest rates increase HELOC costs. This strategy is not suitable for everyone — speak with a licensed financial advisor before proceeding.

No. This tool was built by a personal finance enthusiast and is shared freely for educational purposes. It is not affiliated with any bank, investment firm, or financial advisory service. Nothing on this site constitutes financial advice.

The calculator models the mathematical mechanics of the Smith Manoeuvre accurately: monthly amortization, HELOC readvancement, compound investment growth, HELOC interest accrual, and annual tax refund calculations. It does not account for investment management fees, transaction costs, or the variability of real-world market returns. Treat all projections as illustrative scenarios, not predictions.

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100% free tool, built with ❤️ by a fellow Canadian personal finance enthusiast.

Turn Your Mortgage Intoa Wealth-Building Machine