How does a HELOC work in Canada?
**A Home Equity Line of Credit (HELOC) is a revolving credit facility secured by your home equity.** Unlike a mortgage where you borrow a fixed amount and repay on a set schedule, a HELOC gives you access to a credit limit that you can draw from and repay as needed, similar to a credit card but at much lower interest rates because your home serves as collateral.
Canadian HELOCs are governed by OSFI Guideline B-20, which sets two key limits. First, the HELOC portion alone cannot exceed 65% of your home's appraised value (known as the loan-to-value or LTV ratio). Second, when combined with any existing mortgage, the total borrowing cannot exceed 80% of the home's value (combined LTV or CLTV).
For example, if your home is worth $600,000, the maximum standalone HELOC would be $390,000 (65% of $600,000). But if you have a $300,000 mortgage, the HELOC is capped at $90,000 because the combined total ($300,000 + $90,000 = $390,000) cannot exceed $480,000 (80% of $600,000). In this case, the 65% rule is the binding constraint.
Interest on a HELOC accrues daily on your outstanding balance using simple interest: Daily Interest = Drawn Balance x (Annual Rate / 365). The minimum payment required by most Canadian lenders is interest-only, meaning your principal balance never decreases unless you voluntarily pay more than the minimum. This revolving, interest-only structure is both the greatest advantage and biggest risk of a HELOC.
The 65% LTV rule and combined 80% LTV cap
**Understanding the two LTV limits is essential for determining your actual HELOC borrowing capacity.** The 65% rule limits the HELOC component specifically, while the 80% combined rule limits total secured borrowing against the property.
The 65% LTV limit exists because OSFI considers revolving credit riskier than amortizing mortgages. With a mortgage, the borrower is required to make principal payments that reduce the debt over time. With a HELOC, the borrower can maintain the full balance indefinitely with interest-only payments, which increases the lender's risk exposure.
Here is how the two rules interact across different scenarios. If you own a $500,000 home free and clear (no mortgage), your maximum HELOC is $325,000 (65% of $500,000). The 80% combined rule allows $400,000, but the 65% HELOC-specific cap is more restrictive. If you have a $200,000 mortgage on the same home, your maximum HELOC drops to $125,000 (65% x $500,000 = $325,000 minus $200,000). The combined total is $325,000, well under the $400,000 combined limit.
If you have a $350,000 mortgage on a $500,000 home, the 65% rule gives $325,000 minus $350,000 = negative, but the 80% combined cap gives $400,000 minus $350,000 = $50,000. In this case, you would not qualify for a HELOC under the 65% rule because your mortgage already exceeds 65% of the home value.
| Home Value | Mortgage | Max HELOC (65% rule) | Combined LTV |
|---|---|---|---|
| $500,000 | $0 | $325,000 | 65% |
| $500,000 | $200,000 | $125,000 | 65% |
| $600,000 | $300,000 | $90,000 | 65% |
| $800,000 | $400,000 | $120,000 | 65% |
| $1,000,000 | $500,000 | $150,000 | 65% |
HELOC vs mortgage vs personal line of credit
**Choosing between a HELOC, a traditional mortgage, and an unsecured line of credit depends on your borrowing purpose, timeline, and risk tolerance.** Each product has distinct characteristics that make it suitable for different situations.
A traditional mortgage offers the lowest interest rates (currently 3.5% to 5% in Canada) with fixed or variable rate options and a structured repayment schedule. You borrow a lump sum to purchase or refinance a property and repay over 15 to 30 years. The downside is inflexibility: prepayment penalties can apply, and you cannot re-borrow repaid amounts without refinancing.
A HELOC offers lower rates than unsecured borrowing (prime + 0% to 1%) with maximum flexibility. You draw and repay as needed, paying interest only on the drawn amount. The risk is the revolving nature: without discipline, borrowers can stay in debt indefinitely. Your home is collateral, so default puts the property at risk.
An unsecured personal line of credit requires no collateral but charges significantly higher rates (prime + 2% to 7%). Limits are lower ($5,000 to $50,000 typically) and the rate reflects the lender's unsecured risk. If you do not own a home or do not want to pledge property, this is the alternative.
| Feature | HELOC | Mortgage | Unsecured LOC |
|---|---|---|---|
| Interest rate | Prime + 0% to 1% | 3.5% to 5% (fixed/variable) | Prime + 2% to 7% |
| Rate type | Variable only | Fixed or variable | Variable only |
| Collateral | Home equity | Home (primary charge) | None |
| Max LTV | 65% standalone | 80% (95% insured) | N/A |
| Repayment | Interest-only minimum | Blended P&I | Interest-only minimum |
| Revolving | Yes | No | Yes |
| Prepayment penalty | None | Yes (fixed rate) | None |
The interest-only payment trap with HELOCs
**The most common mistake HELOC borrowers make is relying on interest-only minimum payments indefinitely.** Because the minimum payment on a HELOC covers only the interest, your principal balance never decreases unless you pay more. This means you can hold the same debt for decades, paying significant interest without ever reducing what you owe.
Consider a $100,000 HELOC at 5.45%. The monthly interest-only payment is $454. After 10 years of minimum payments, you will have paid $54,500 in interest and still owe the full $100,000. After 25 years, the interest paid totals $136,250, which is more than the original debt, and you still owe $100,000.
The problem is compounded by the revolving nature of HELOCs. Even if you occasionally pay down $10,000 in principal, the credit is immediately available to draw again. Without a disciplined repayment plan, many borrowers find their HELOC balance stays flat or increases over time, especially when using it for ongoing expenses.
To avoid this trap, treat your HELOC like a term loan. Set a fixed monthly payment that includes principal repayment and commit to not making new draws. Even adding $200 per month above the interest-only minimum on a $100,000 HELOC at 5.45% would pay it off in about 25 years and save tens of thousands in interest compared to indefinite interest-only payments.
The Smith Manoeuvre and tax-deductible HELOC interest
**The Smith Manoeuvre is a Canadian tax strategy that uses a readvanceable mortgage and HELOC to convert non-deductible mortgage interest into tax-deductible investment interest.** Developed by Fraser Smith, the strategy works by reborrowing the principal paid down on your mortgage through the HELOC component and investing the borrowed funds in income-producing assets.
Here is how it works: your readvanceable mortgage combines a standard mortgage with a HELOC. Each month, as your mortgage payment reduces the principal by, say, $1,000, your available HELOC limit increases by that same $1,000. You draw that $1,000 from the HELOC and invest it in stocks, bonds, or other income-producing assets. The interest on the HELOC portion becomes tax-deductible because the CRA allows deduction of interest on money borrowed to earn investment income.
The key requirement is that the borrowed funds must be used for eligible investment purposes. Borrowing from your HELOC to buy groceries or renovate your kitchen does not make the interest deductible. The CRA traces the use of borrowed funds, so you need to maintain clear documentation showing the HELOC draws went directly into a non-registered investment account.
The Smith Manoeuvre carries risks. Your investments may lose value while you still owe the HELOC balance. The HELOC rate is variable, so rising rates increase your cost. And the tax deduction only offsets part of the interest cost, not all of it. This strategy is best suited for borrowers with a long time horizon, risk tolerance, and the discipline to maintain the structure over many years.
Common uses for a HELOC in Canada
**Home renovations are the most popular use of HELOCs in Canada because improvements can increase the property's value, potentially offsetting the borrowing cost.** A $50,000 kitchen renovation financed through a HELOC at 5.45% costs $227 per month in interest. If the renovation adds $40,000 or more in home value, the net cost of borrowing is relatively low.
Debt consolidation is another common use. Canadians carrying high-interest credit card debt (19.99% to 22.99%) can consolidate it into a HELOC at 5.45%, cutting their interest cost by 70% or more. On $30,000 of credit card debt, switching to a HELOC saves approximately $4,500 per year in interest. The risk is that the credit cards become available to use again, potentially doubling the total debt.
Investment borrowing (including the Smith Manoeuvre described above) uses the HELOC as a source of low-cost capital for income-producing investments. Education funding, emergency reserves, and bridging short-term cash flow gaps are other common uses. Each use case has different risk profiles and tax implications.
One use to approach with caution is borrowing against home equity for lifestyle expenses like vacations, vehicles, or wedding costs. While the interest rate is lower than consumer credit, you are pledging your home against a depreciating expense. If your financial situation changes and you cannot repay, you risk losing your home for something that has no lasting value.
How to use this calculator: a worked example
**Let us walk through a real scenario to show what this HELOC calculator reveals.** Suppose you own a home worth $700,000 with a remaining mortgage of $350,000, and you want to access home equity for a $75,000 renovation.
Step 1: Enter $700,000 as the home value. Step 2: Enter $350,000 as the mortgage balance. The calculator shows your maximum HELOC is $105,000 (65% of $700,000 = $455,000 minus $350,000). Your combined LTV would be 65.0%. You have plenty of room for a $75,000 HELOC draw.
Step 3: Set the HELOC rate to 5.45% (prime + 1%). Step 4: Set the draw amount to $75,000. In interest-only mode, the calculator shows you will pay $11.20 per day, $341 per month, and $4,088 per year in interest. The warning panel shows this costs $20,438 over 5 years and $40,875 over 10 years with no principal repaid.
Now switch to 'Fixed monthly payment' mode and set the payment to $1,000 per month. The calculator shows you will pay off the $75,000 in approximately 93 months (7 years 9 months) and pay $17,542 in total interest. The equity breakdown chart visually shows how your mortgage, HELOC, and free equity portions relate to your home value.
Frequently asked questions
What is the maximum HELOC you can get in Canada?
In Canada, the maximum HELOC is limited to 65% of your home's appraised value (OSFI Guideline B-20). When combined with any existing mortgage, the total cannot exceed 80% of the home value. For example, on a $600,000 home with a $300,000 mortgage, the maximum HELOC is $90,000 ($600,000 x 65% = $390,000 minus $300,000 mortgage).
What is the current HELOC interest rate in Canada?
HELOC rates in Canada are variable, typically priced at prime + 0% to prime + 1%. With the Bank of Canada prime rate at 4.45% (April 2026), most HELOCs range from 4.45% to 5.45%. Your specific rate depends on your credit score, equity position, and lender. Borrowers with strong credit and high equity positions may qualify for prime + 0%.
What is the difference between a HELOC and a home equity loan?
A HELOC is revolving credit: you draw and repay as needed, paying interest only on the drawn amount. A home equity loan (second mortgage) is a lump-sum loan with fixed payments and a set term. HELOCs have variable rates and interest-only minimum payments. Home equity loans can have fixed rates and require principal-and-interest payments. HELOCs are limited to 65% LTV; home equity loans can go up to 80% LTV.
Is HELOC interest tax deductible in Canada?
HELOC interest is tax deductible only if the borrowed funds are used for income-producing purposes, such as investing in stocks, bonds, rental property, or a business. Interest on a HELOC used for personal expenses (renovations, debt consolidation, vehicle purchase) is not deductible. The CRA traces the use of funds, so you must maintain clear records. The Smith Manoeuvre strategy specifically uses this rule to make mortgage interest effectively deductible.
What is the Smith Manoeuvre?
The Smith Manoeuvre is a Canadian tax strategy that converts non-deductible mortgage interest into tax-deductible investment interest. It uses a readvanceable mortgage with a HELOC component. As you pay down mortgage principal each month, the HELOC limit increases by the same amount. You draw from the HELOC and invest in income-producing assets, making the HELOC interest tax deductible. The strategy requires discipline, a long time horizon, and tolerance for investment risk.
What is a readvanceable mortgage?
A readvanceable mortgage is a combined loan product that includes a traditional mortgage and a HELOC under a single registered charge on your property. As you make mortgage payments that reduce the principal, your HELOC credit limit automatically increases by the same amount. This means your total borrowing capacity stays constant while the mix shifts from mortgage to HELOC. Major Canadian banks and credit unions offer readvanceable products.
Can I lose my home with a HELOC?
Yes. A HELOC is secured by your home, meaning the lender has a registered charge (or lien) against your property. If you default on your HELOC payments, the lender can pursue foreclosure or power of sale, depending on your province. This is the trade-off for the lower interest rate compared to unsecured borrowing. Always ensure your HELOC payments are manageable even if interest rates rise.
How is HELOC interest calculated?
HELOC interest is calculated daily using simple interest on your outstanding drawn balance: Daily Interest = Drawn Balance x (Annual Rate / 365). The daily charges are summed at the end of each month for your statement. You only pay interest on the amount you have actually drawn, not your total approved credit limit. Paying down even a small amount of principal immediately reduces your daily interest charge.
Should I use a HELOC for debt consolidation?
Using a HELOC for debt consolidation can save significant interest, especially if you are consolidating credit card debt at 19.99% to 22.99% into a HELOC at 5.45%. However, there are risks: your credit cards become available to use again (potentially doubling your debt), you are pledging your home against what was previously unsecured debt, and the HELOC rate is variable. Debt consolidation works best when you also close or reduce the credit card limits you consolidate.
What happens to my HELOC when interest rates change?
HELOC rates are variable and tied to the prime rate. When the Bank of Canada changes its overnight rate, the prime rate adjusts and your HELOC rate moves immediately. A 0.25% rate increase on a $100,000 HELOC balance adds $250 per year ($21 per month) to your interest cost. A 1% increase adds $1,000 per year. During the 2022-2023 rate hiking cycle, borrowers with $100,000 HELOC balances saw annual interest costs increase by approximately $4,750.