The kitchen needs redoing, or the basement’s finally getting finished, or there’s a renovation that’s been on the list for two years and the number keeps growing every time you get a new quote. At some point, most homeowners land on the same question: how do you actually pay for this without draining your savings?

For a lot of Canadians, the answer involves tapping into the equity that’s built up in their home. There are two main ways to do that — a Home Equity Line of Credit (HELOC) and a mortgage refinance — and they work differently enough that picking the wrong one can cost you real money.

What a HELOC actually is

A HELOC is a revolving line of credit secured against your home, similar in structure to a credit card but typically with dramatically lower interest rates because your house is the collateral. You’re approved for a credit limit — generally up to 65% of your home’s value on its own, or up to 80% when combined with your existing mortgage balance — and you can draw from it, pay it down, and draw again, as needed, without reapplying each time.

You only pay interest on what you’ve actually drawn, not on the full approved limit. Many HELOCs are also interest-only during the draw period, meaning your minimum required payment covers just the interest, though you can pay down principal whenever you choose.

What refinancing actually is

Refinancing means replacing your existing mortgage with a new one — typically for a larger amount, with the extra funds paid out to you in a lump sum at closing. Unlike a HELOC, this isn’t a flexible line you draw from over time; it’s a fixed amount, delivered once, structured into your regular mortgage payments going forward.

Refinancing also generally means resetting your mortgage terms — potentially a new rate, a new amortization schedule, and depending on how far into your existing term you are, possibly a prepayment penalty for breaking your current mortgage early.

The core trade-offs

Flexibility. A HELOC wins clearly here. If your renovation costs are uncertain — you’re not sure yet whether it’s a $40,000 job or a $70,000 job once the contractor opens the walls — a HELOC lets you draw exactly what you need, when you need it, rather than borrowing a lump sum upfront based on a guess.

Rate structure. HELOCs are almost always variable, tied to prime rate, which means your interest cost moves with Bank of Canada policy. A refinance can be structured as fixed or variable, giving you the option of payment certainty if that matters more to you than flexibility.

Upfront cost. If you’re mid-term on your existing mortgage, refinancing often means breaking it — which can trigger a real penalty, calculated as either three months’ interest or the interest rate differential depending on your mortgage type. A HELOC added alongside your existing mortgage typically doesn’t require breaking anything, which can make it meaningfully cheaper to set up if your current mortgage still has significant time left on its term.

Discipline required. Because a HELOC is a revolving line rather than a fixed, amortizing loan, it’s genuinely easy to draw it down for the renovation, make interest-only payments for years, and never meaningfully reduce the principal unless you’re deliberate about it. A refinance, by contrast, is built into a standard amortization schedule from day one, which forces gradual repayment whether you think about it or not.

Long-term cost. For a large amount you know you need in full, and plan to pay down steadily over years, a refinance can end up cheaper overall — you’re not paying HELOC’s typically higher variable rate over an extended, undisciplined payoff period, and you may be able to lock in a fixed rate for payment predictability.

When a HELOC tends to be the better fit

• Your renovation scope or cost isn’t fully locked down yet, and you want to draw funds in stages as work progresses and invoices come in.
• You’re comfortably mid-term on a mortgage with a good rate, and breaking it to refinance would trigger a meaningful penalty.
• You want ongoing access to equity beyond just this one project — a HELOC, once set up, stays available as a financial tool for future needs, not just the current renovation.
• You’re confident in your own ability to pay down the balance deliberately, rather than letting it linger at interest-only payments indefinitely.

When refinancing tends to be the better fit

• You know the full renovation cost with reasonable confidence and want it as a single lump sum, structured into predictable payments from the start.
• Your existing mortgage term is naturally ending soon anyway, or close enough that a penalty for breaking it is minimal or nonexistent.
• You’d genuinely prefer the forced discipline of a standard amortization schedule over the flexibility — and temptation — of a revolving line.
• You want the option of locking in a fixed rate for the borrowed amount, rather than being fully exposed to future rate movements.

A blended option worth knowing about

Some lenders offer what’s sometimes called a readvanceable mortgage — a combined mortgage and HELOC structure where your available HELOC limit increases automatically as you pay down your mortgage principal. This gives you ongoing access to a growing pool of equity without needing to refinance or reapply each time, which can suit homeowners who expect to tackle renovation projects periodically over several years rather than all at once.

The question worth asking before either

Regardless of which structure you choose, it’s worth being honest about whether the renovation is actually going to add value to your home, or whether it’s a lifestyle upgrade you’re comfortable financing against your equity either way. Both are legitimate reasons to renovate — but a value-adding renovation financed against home equity is a genuinely different financial decision than a personal preference upgrade financed the same way, and it’s worth knowing which one you’re making.

Weighing a HELOC against a refinance for an upcoming project? RateFair can walk through both options against your actual mortgage details — current rate, remaining term, and home equity — so you can see the real numbers before deciding. Get pre-qualified in 60 seconds with our app.