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Important Requirement: This strategy requires a Readvanceable Mortgage (a home equity line of credit that automatically expands as you pay down your mortgage principal).

To implement this strategy, you'll need a readvanceable mortgage. Want to know more?

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Readvanceable mortgage products are not offered by all lenders and are subject to qualification. Contact us to discuss your situation.

TDIS Pro

Dynamic Wealth Acceleration Calculator

Methodology & sourcing: OSFI's 65% HELOC loan-to-value limit, the eligible Canadian dividend tax credit mechanics (38% gross-up, 15.0198% federal credit), and the historical market-shock presets are all verified against public 2026-current sources — see OSFI, CRA, and historical S&P 500 / mortgage-rate records. Last reviewed and figures cross-checked: July 2026.

Important Regulatory & Legal Notice

These projections are for educational and illustrative purposes only and do not constitute formal financial or tax advice. CRA tax deductibility requires funds to directly produce or intend to produce income. Consult a tax professional before implementing leveraged investment strategies.

Your Numbers

Enter your basic details to see your projection instantly.

Property & Loans

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80%: $0 65%: $0
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Existing Built-Up Equity
Available Equity to Invest: $0

Rates & Timing

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💡 Break-Even Threshold: Your portfolio only needs to earn 0.00% after-tax to be profitable.
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You can still adjust your numbers and recalculate anytime after this.

Your results will appear here

Enter your numbers above, then click "Calculate My Strategy" to see your projection.

Explore Advanced Strategies

These are optional strategies that can accelerate your results — enable only the ones relevant to your situation.

How These Numbers Were Calculated

The rules and assumptions behind this projection, explained simply.

The 80% LTV & Readvancement Rule

Under Canadian regulations, the maximum combined loan-to-value limit cannot exceed 80% of property value. HELOC borrowing is strictly capped at 65% of the home value.

Maximum Borrowing Capacity (80% LTV):$0
Initial Readvancement Room:$0

CRA Tax Deductibility Rule

The Canada Revenue Agency (CRA) dictates that borrowing interest is only tax-deductible when the funds are used with a "reasonable expectation of generating income".

Compliance Checklist
Non-registered account used

Canadian Mortgage Compounding Rule

Unlike mortgages in the United States which compound monthly, Canadian mortgages are legally required to compound semi-annually.

Bi-weekly: (1 + Rate/2)2/26 - 1
Monthly: (1 + Rate/2)2/12 - 1

Conservative Property Value Assumption

This calculator assumes a 0% home price appreciation rate. In real-world layouts, if your house value jumps, your limits organically rise cleanly as well.

Initial House Asset Value:$1,106,000

Tax Refund & Portfolio Growth

Each year, the tax refund generated from your HELOC interest deduction is automatically reinvested to supercharge your compound progression stream.

Assumed Portfolio Growth Rate:7.5%

Flat-Line Interest & Return Assumption

This model assumes that rates and market return vectors remain static throughout. In reality, metrics fluctuate across economic cycles.

Calculations are illustrative and not guaranteed returns.

Important Legal & Regulatory Disclosure

1. Not Financial Advice: This calculator is for educational and illustrative purposes only. It does not constitute financial, investment, or tax advice.

2. Tax Deductibility: Per CRA rules, interest is only tax-deductible if funds are used with a "reasonable expectation of generating income" (e.g., dividends or rental income). Capital gains alone do not qualify. You are solely responsible for maintaining records to prove income-producing intent.

3. Capitalized Interest: Tax deductibility of capitalized interest ("interest on interest") depends on the precise borrowing structure used. Consult a CPA to ensure compliance.

4. No Guarantees: All investment strategies involve inherent risks. Past performance or projections do not guarantee future results. Leverage (borrowing to invest) can amplify losses as well as gains.

5. FSRA Compliance: Calculations correspond to numbers supplied. Please consult with a qualified tax professional or financial advisor before implementing complex debt-leverage strategies.

6. Setup and Professional Service Costs: Although setting up and running this strategy through your readvanceable mortgage structure is designed to function with zero direct incremental costs, utilizing the services of independent financial professionals (e.g., specialized accountants, corporate tax experts, or certified financial planners) to establish, review, or file documents will incur professional service fees.

CRA Compliance & Account Setup Guide

The CRA's core rule for deductible interest is strict use-of-funds tracing (Income Tax Folio S3-F6-C1). Follow this structure carefully to preserve deductibility.

Keep Funds Separate

Never co-mingle borrowed (HELOC) funds with personal/other funds in the same account. Maintain a dedicated, separate chequing or investment account that ONLY ever receives HELOC-borrowed funds and ONLY ever pays for investments — no personal expenses, no rental deposits, no other transactions should ever pass through it. Co-mingling breaks the CRA's ability to trace borrowed funds to an income-producing use, which can invalidate the interest deduction entirely.

Where NOT to Invest Borrowed Funds

Never invest HELOC-borrowed funds inside a registered account (TFSA, RRSP, FHSA, RESP). Interest on money borrowed to invest in a registered account is NEVER tax-deductible, regardless of the investment's income potential, because registered accounts are not taxable — there is no taxable income for the interest to be traced against.

Watch for Return of Capital (ROC)

Some investments (especially certain mutual funds, REITs, and ETFs) distribute Return of Capital rather than genuine income (dividends, interest, or realized gains). ROC is not considered income for CRA deductibility purposes — if a significant portion of an investment's distributions are ROC, the interest deduction on funds used to buy that investment may be challenged. Clients should review a fund's distribution breakdown (available in its annual tax slip or fund fact sheet) before relying on it as the "income-producing" security for this strategy.

This section is educational only and does not replace advice from a qualified CPA or tax professional familiar with your specific situation. Proper account structuring should be set up and reviewed with a professional before implementing this strategy.

Ankit Thakor
MORTGAGE ARCHITECTS
QUESTIONS ABOUT THESE RESULTS?

ANKIT THAKOR

Mortgage Agent – Level 1 · Mortgage Architects (Brokerage FSRA # 12728)

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Frequently Asked Questions: Tax-Deductible Mortgages in Canada

What is a tax-deductible mortgage strategy?

In Canada, mortgage interest on your primary residence is not typically tax-deductible. However, by using a readvanceable mortgage to borrow against your home equity for the purpose of investing in income-producing assets, the interest on that borrowed portion becomes tax-deductible under CRA rules. This is often referred to as the Tax-Deduction Investment Strategy (TDIS) or the Smith Manoeuvre.

Do I need a readvanceable mortgage to use this calculator?

Yes. To successfully convert bad debt to good debt, you need a specific readvanceable mortgage product (like the Manulife One, Scotia STEP, or National Bank STEP). These products automatically increase your Home Equity Line of Credit (HELOC) limit every time you pay down your mortgage principal.

Is the interest on my HELOC always tax-deductible?

To claim the interest deduction on Line 22100 of your Canadian tax return, the borrowed funds must be invested with a reasonable expectation of generating income (like eligible Canadian dividends or rental income). Simply aiming for capital gains is not enough. Always consult a qualified CPA.

What's the difference between "Principal Readvance" and "Total Reinvested" in the table?

Principal Readvance is just the new HELOC room freed up by that year's mortgage paydown, automatically invested. Total Reinvested adds two more sources on top of that: any net dividends and net tax refunds left over after covering HELOC costs. So Total Reinvested = Principal Readvance + Net Dividend Reinvested + Net Tax Refund Reinvested.

What's the difference between Portfolio Value and Net Worth?

Portfolio Value is simply the full balance of your investment account — everything you've contributed plus growth. Net Worth goes a step further and subtracts what you still owe (your remaining mortgage and HELOC balance), so it shows what you'd actually have left if you sold everything and paid off all debt today.

What's the risk if my investments lose money instead of growing?

This strategy uses borrowed money (leverage) to invest, so it amplifies both gains and losses. If your investments underperform your assumed return — or lose value — your Net Worth could end up lower than if you'd simply paid down your mortgage the traditional way, while you'd still owe the full HELOC balance. Use conservative return assumptions and speak with a licensed advisor before proceeding.

What happens when my HELOC hits its credit limit?

Most readvanceable mortgages cap the combined mortgage + HELOC at around 65% of your home's value (rising toward 80% as the mortgage is paid down). Once your HELOC reaches that ceiling, interest can no longer be capitalized automatically and becomes a real out-of-pocket cost. The calculator flags this with a warning banner and adjusts the projection accordingly.

Is this the same thing as the Smith Manoeuvre?

Yes — this calculator models the mechanics popularized as the "Smith Manoeuvre" in Canada, where you convert non-deductible mortgage interest into deductible investment-loan interest over time by using a readvanceable mortgage to invest your home equity gradually.