A readvanceable mortgage is one of the most powerful — and most misunderstood — mortgage products available in Canada. It combines a standard mortgage with a HELOC under a single registration, and the HELOC limit automatically increases as you pay down your mortgage principal. The core idea is simple: every dollar of principal you repay becomes a dollar of available credit you can reborrow immediately. This creates a revolving source of capital tied to your home equity, without reapplying or paying additional fees.
The product is the backbone of the Smith Manoeuvre, a Canadian tax strategy where you convert non-deductible mortgage debt into tax-deductible investment debt. But even without advanced strategies, a readvanceable mortgage gives homeowners flexible, low-cost access to equity for renovations, emergencies, or investment opportunities.
How a Readvanceable Mortgage Works
The Basic Mechanics
| Component | Description |
|---|---|
| Mortgage portion | Standard amortizing mortgage — principal declines with each payment |
| HELOC portion | Revolving credit line — available limit grows as mortgage principal shrinks |
| Combined limit | Typically up to 80% of appraised home value |
| Registration | Single collateral charge (usually 100–125% of home value) |
How the Readvancing Works Over Time
| Year | Mortgage Balance | Available HELOC | Total Facility |
|---|---|---|---|
| Year 0 | $400,000 | $0 | $400,000 |
| Year 3 | $365,000 | $35,000 | $400,000 |
| Year 5 | $340,000 | $60,000 | $400,000 |
| Year 10 | $275,000 | $125,000 | $400,000 |
| Year 15 | $195,000 | $205,000 | $400,000 |
| Year 20 | $100,000 | $300,000 | $400,000 |
Based on $500,000 home, 80% LTV limit ($400,000 facility), 5% mortgage rate, 25-year amortization. HELOC availability assumes no additional draws.
Every payment you make effectively shifts capacity from the mortgage column to the HELOC column. The total facility stays at 80% of home value unless the property is reappraised at a higher amount.
Lender Comparison: Readvanceable Products in Canada
| Lender | Product Name | Max LTV | HELOC Rate | Sub-Accounts | Registration Type |
|---|---|---|---|---|---|
| Scotiabank | STEP (Scotia Total Equity Plan) | 80% | Prime + 0.50% | Multiple | Collateral |
| TD Bank | Home Equity FlexLine | 80% | Prime + 0.50% | Multiple | Collateral |
| National Bank | All-In-One | 80% | Prime + 0.50% | Yes | Collateral |
| Manulife | Manulife One | 80% | Prime + 0.50%–1.0% | Integrated | Collateral |
| RBC | Homeline Plan | 80% | Prime + 0.50% | Yes | Collateral |
| BMO | ReadiLine | 80% | Prime + 0.50% | Limited | Collateral |
| CIBC | Home Power Plan | 80% | Prime + 0.50% | Yes | Collateral |
Key Differences Between Products
Manulife One operates as an all-in-one account where your chequing, savings, mortgage, and HELOC are combined into a single balance. Your paycheque directly offsets your mortgage balance, reducing interest daily. This is unique among Canadian readvanceable products.
National Bank All-In-One works similarly to Manulife One with an integrated account structure.
Scotiabank STEP and TD FlexLine are more traditional: the mortgage and HELOC are clearly separated into sub-accounts. STEP is widely considered the most flexible option for multiple sub-account setups, which is important for Smith Manoeuvre tracking.
The Smith Manoeuvre: Why Readvanceable Mortgages Matter
The Smith Manoeuvre is a Canadian wealth-building strategy pioneered by Fraser Smith. It works like this:
Step-by-Step Process
| Step | Action |
|---|---|
| 1 | Make your regular mortgage payment (reduces principal) |
| 2 | HELOC available credit increases by the principal amount paid |
| 3 | Borrow the new HELOC capacity |
| 4 | Invest the borrowed money in income-producing investments |
| 5 | HELOC interest on investment borrowing is tax-deductible |
| 6 | Repeat with every mortgage payment |
The Math Over 25 Years
| Scenario | Without Smith Manoeuvre | With Smith Manoeuvre |
|---|---|---|
| Starting mortgage | $400,000 | $400,000 |
| Total interest paid (mortgage) | $290,000 | $290,000 |
| Tax deductions on interest | $0 | ~$90,000–130,000 in deductions |
| Investment portfolio built | $0 | ~$400,000 (at 7% avg return) |
| Net result after 25 years | Home paid off, $0 portfolio | Home paid off, $400K portfolio minus HELOC balance |
These are illustrative estimates. Actual results depend on investment returns and tax rates.
The Smith Manoeuvre does not reduce your mortgage. Instead, it converts your non-deductible mortgage debt into deductible HELOC debt dollar-for-dollar, while building an investment portfolio on the side. The risk is that investments could decline in value while the HELOC debt remains.
Who Should Get a Readvanceable Mortgage
Ideal Candidates
| Profile | Why a Readvanceable Works |
|---|---|
| Smith Manoeuvre practitioners | Need automatic HELOC access as mortgage declines |
| Homeowners planning renovations | Borrow as equity builds instead of separate loan |
| Self-employed with irregular income | Flexible draw/repay structure |
| Real estate investors | Access equity for down payments on other properties |
| Disciplined savers who want liquidity | Keep capital accessible as emergency fund |
Who Should Avoid It
| Profile | Why to Avoid |
|---|---|
| Borrowers who struggle with spending | Easy access to credit is dangerous |
| First-time buyers with minimal equity | HELOC won’t activate until 20% equity |
| People who switch lenders frequently | Collateral charge makes switching expensive |
| Those seeking lowest possible rate | Monoline lenders often have better rates but don’t offer readvanceable |
Cost Comparison: Readvanceable vs Standard Mortgage
| Feature | Readvanceable Mortgage | Standard Mortgage + Separate HELOC |
|---|---|---|
| Setup cost | One registration ($500–1,500) | Two registrations ($1,000–3,000) |
| HELOC activation | Automatic as principal declines | Manual — separate application required |
| Rate on mortgage portion | Competitive (Big 5 pricing) | May be better with monoline lender |
| Rate on HELOC | Prime + 0.50% typically | Prime + 0.50% typically |
| Switching lenders at renewal | Expensive ($1,000–1,900) | Mortgage portion transferable; HELOC is not |
| Flexibility | Maximum | Lower — must reapply for new HELOC limit |
The Rate Trade-off
The biggest hidden cost of a readvanceable mortgage is the mortgage rate itself. Big banks that offer readvanceable products typically charge 0.10%–0.30% higher than monoline lenders (like MCAP, First National, or CMLS).
| Lender Type | Typical 5-Year Fixed Rate | Rate Premium |
|---|---|---|
| Big 5 bank (readvanceable available) | 4.59% | +0.15–0.30% |
| Monoline lender (no readvanceable) | 4.29% | Baseline |
On a $400,000 mortgage, a 0.20% rate premium costs approximately $4,800 over a 5-year term. Whether the readvanceable feature is worth that premium depends entirely on how you plan to use the HELOC component.
Setting Up Sub-Accounts
One of the most important features for tax purposes is the ability to create multiple HELOC sub-accounts. Each sub-account can have a separate purpose, which is critical for tracking tax-deductible versus non-deductible borrowing.
Example Sub-Account Setup
| Sub-Account | Purpose | Tax-Deductible? |
|---|---|---|
| Mortgage | Primary home loan | No |
| HELOC Sub-1 | Smith Manoeuvre investment borrowing | Yes |
| HELOC Sub-2 | Rental property renovation | Yes |
| HELOC Sub-3 | Personal use (renovation, emergency) | No |
The CRA requires you to track borrowed money by purpose. If you borrow $50,000 for investments and $20,000 for a kitchen renovation from the same HELOC, only the $50,000 portion generates deductible interest. Separate sub-accounts make this bookkeeping simple.
Important Considerations
Collateral Charge Registration
All readvanceable mortgages use collateral charge registration. This has real consequences:
| Issue | Impact |
|---|---|
| Switching lenders | Must fully discharge and re-register ($1,000–1,900) |
| Renewal negotiation | Less leverage because switching is expensive |
| Second mortgage | Usually not possible (no room behind collateral charge) |
| Lender knows your total borrowing | May affect other lending decisions |
Read more about collateral vs conventional mortgages.
Interest-Only HELOC Payments
The HELOC component requires only interest payments — there is no mandatory principal repayment. This means:
| Balance | Monthly Interest Payment (Prime + 0.50%) |
|---|---|
| $50,000 | ~$271 |
| $100,000 | ~$542 |
| $200,000 | ~$1,083 |
| $300,000 | ~$1,625 |
Based on prime rate of 5.95% (HELOC rate of 6.45%).
If you are not disciplined about repaying the HELOC, your total debt can remain flat or even grow while your mortgage declines. After 25 years, some borrowers find themselves mortgage-free but carrying a large HELOC balance with no forced repayment schedule.
Property Value Declines
If your property value drops, the lender may reduce your HELOC limit. This is risk if you are relying on HELOC access for Smith Manoeuvre or other strategies. The lender can also conduct a new appraisal at any time and adjust your facility limit downward.
How to Apply for a Readvanceable Mortgage
| Step | Details |
|---|---|
| 1 | Choose a lender from the product comparison table above |
| 2 | Apply for the combined mortgage + HELOC facility |
| 3 | Property appraisal determines maximum facility (80% of appraised value) |
| 4 | Mortgage portion is set at your required borrowing amount |
| 5 | HELOC capacity starts at $0 (or the gap between mortgage and 80% LTV) |
| 6 | As you make payments, HELOC limit auto-increases |
If you already have a standard mortgage and want to switch to readvanceable, you will need to refinance — which triggers appraisal, legal fees, and potentially a penalty if you are mid-term.