• What a HELOC Is

A Home Equity Line of Credit is a revolving credit facility secured against your home. Unlike a mortgage, you are not given a lump sum — you are given a credit limit that you can draw from and repay repeatedly, much like a credit card but at a significantly lower interest rate because your home secures it. In Canada, OSFI regulations cap a standalone HELOC at 65% of your home's appraised value. When combined with a mortgage, the combined loan-to-value (LTV) cannot exceed 80%. So on an $800,000 home, the maximum combined mortgage and HELOC exposure is $640,000.

HELOC interest rates are always variable in Canada, set at prime rate plus a lender-specific premium (typically 0.5% to 1.0%). Because the rate floats with the Bank of Canada's prime rate decisions, your borrowing cost can increase meaningfully if rates rise. Most HELOCs are interest-only — meaning you are only required to make interest payments each month, not principal repayments — which makes them easy to carry but dangerous to ignore.

• What Refinancing for Equity Access Means

When you refinance to access equity, you break your existing mortgage and replace it with a new, larger one. The difference between your old balance and the new mortgage amount is delivered to you as a lump sum at closing. You can use that money however you choose, and the full new mortgage balance is repaid over an amortization period you choose at origination. Canadian lenders will refinance up to 80% LTV, and the new mortgage can be fixed or variable rate, giving you more control over rate risk than a HELOC allows. The tradeoff is that refinancing triggers a prepayment penalty on your existing mortgage if you are mid-term, and requires legal fees and an appraisal.

• Side-by-Side Comparison

• When a HELOC Makes More Sense

A HELOC is the better tool when your funding need is ongoing or uncertain in size. A multi-phase home renovation is the textbook example: you don't know exactly how much you'll spend, the work happens over months, and you only want to pay interest on what you've actually drawn. HELOCs are also well suited for emergency financial buffers, where you want access to funds but hope never to use them. Real estate investors sometimes use HELOCs on a principal residence to fund down payments on investment properties, allowing them to draw, purchase, and repay on their own schedule. If your existing mortgage has a large break penalty because you are mid-term on a fixed rate, a HELOC avoids triggering that penalty entirely — you add the HELOC as a second product without disturbing the first mortgage.

• When Refinancing Makes More Sense

Refinancing for equity access is the stronger choice when you need a large, defined amount all at once and want fixed-rate certainty for the repayment period. Paying off $80,000 in high-interest consumer debt and knowing exactly what your monthly obligation will be for five years is a compelling case for a cash-out refinance at a locked-in rate. The same applies when you are approaching your renewal date anyway — the penalty for breaking is minimal or zero, making refinancing nearly cost-free. If you are disciplined about debt and prefer structured repayment over an open-ended line of credit, the forced amortization of a mortgage is also a useful feature rather than a limitation.

• HELOC Risks Canadian Borrowers Should Understand

The interest-only structure of most HELOCs creates a real risk of stagnation: you pay interest month after month without meaningfully reducing what you owe. In a period where rates rise, that interest payment grows — sometimes significantly. The Bank of Canada's rate increases between 2022 and 2023 raised HELOC costs by 4+ percentage points for many borrowers, with little warning. There is also a subtler risk: HELOCs are psychologically easy to spend because they feel like your own money. Lenders can also reduce a HELOC limit or freeze access if your home's value falls or if your financial situation changes, which can strand borrowers who had come to rely on it. A HELOC should have a clear repayment plan attached to it, not just a minimum payment strategy.

• Readvanceable Mortgages

Some Canadian lenders offer a readvanceable mortgage, which combines a standard mortgage and a HELOC in a single product. As you make mortgage payments and reduce your principal balance, the available HELOC credit automatically increases by the same amount. This means your equity is always accessible without re-applying for new credit. Products like the CIBC Home Power Plan, RBC Homeline Plan, and Scotia Total Equity Plan operate on this structure. Readvanceable mortgages are particularly useful for investors who want to systematically deploy equity into other assets. The trade-off is that they are typically collateral charge mortgages, which can make switching lenders at renewal more complex than a standard insured or conventional mortgage.

• OSFI Regulations on HELOCs in Canada

The Office of the Superintendent of Financial Institutions (OSFI) governs how federally regulated lenders structure HELOC products. The 65% standalone cap and 80% combined LTV maximum are OSFI requirements, not lender preferences. OSFI has also required that HELOC balances not be bundled into the insured mortgage component, and has historically raised concerns about the pace of HELOC borrowing during periods of rapid home price growth. Provincial credit unions, which operate under provincial regulation rather than federal OSFI oversight, may have slightly different rules — check directly if you are dealing with a credit union rather than a bank or federally regulated trust company.

• Pressure-Testing Your Choice

Before choosing between a HELOC and a refinance, push yourself through three questions. First: do you know exactly how much you need, and will you spend it all within a defined period? If yes, a lump-sum refinance offers the discipline of a structured repayment. If no, a HELOC's flexibility is likely more practical. Second: could you absorb a 2% increase in your borrowing rate? If a HELOC rate spike would genuinely strain your budget, the certainty of a fixed refinance rate is worth more than the convenience. Third: are you mid-term on a fixed mortgage with a large penalty? If so, a HELOC's ability to add credit without breaking the mortgage is often the cost-optimal path. Answer those three questions honestly and the right tool usually becomes clear.

• The Bottom Line

HELOCs and refinancing both unlock home equity, but they solve different problems. Use a HELOC for flexible, ongoing, or uncertain funding needs where avoiding a mortgage break penalty matters. Use refinancing when you need a large defined amount, want rate certainty, or are approaching renewal anyway and the penalty is minimal. The best decision is the one that matches the structure of your need, not the one with the lowest advertised rate.