Second Mortgage vs Refinance vs HELOC in Québec: Which Costs Less?

When you need a significant amount — for a renovation, a down payment on a rental, a business opportunity or to clear high-interest debt — your home equity is usually the cheapest source of money. The question is which structure to use. In Québec, the three main options are a refinance, a home equity line of credit (HELOC) and a second mortgage. The cheapest one depends on your current mortgage, how long you need the money and your qualification.

How much equity can you access?

Federally regulated lenders cap the total of all mortgages and lines secured by your home at 80% of its appraised value. Within that limit, the revolving part of a HELOC can't exceed 65% of the value. Second-mortgage and private lenders may go somewhat higher, at a higher cost.

Example: on an $800,000 home with a $380,000 mortgage, the 80% ceiling is $640,000, so up to $260,000 is accessible through conventional lending. See your own numbers on our home equity calculator.

The three options compared

A real example: $120,000 for two years

A Montréal homeowner has an $800,000 house and a $380,000 mortgage at 3.09% with two years left in the term. They need $120,000 for a renovation and expect to repay much of it within two years. Using illustrative October 2026 rates:

• Refinance to $500,000 at 4.34%: the penalty to break the 3.09% mortgage could range from about $2,900 (three months' interest) to about $8,300 (an interest-rate differential, depending on the lender's method). The new money costs about $10,400 in interest over two years, and the existing $380,000 now carries a higher rate — about $9,500 more interest over two years. Total: roughly $23,000 to $28,000 plus notary and appraisal fees.
• HELOC at prime + 0.50% (4.95%): interest-only on $120,000 is about $495 a month, about $11,900 over two years, plus setup costs. The first mortgage stays at 3.09%. This works if your current lender can add a HELOC (or you qualify for one behind your mortgage) and you pass the stress test.
• Private second mortgage at 9.49% with a 2% fee: about $949 a month interest-only, roughly $25,200 over two years including the fee. More expensive — but available when income or credit rule out the other two, and quick to arrange.

In this case the HELOC wins clearly. But change one variable — a mortgage renewing in three months, or income that won't qualify for a HELOC — and the answer changes. That's why we model all three on your actual file.

When each option makes sense

Refinance

Best at renewal, when there's no penalty, or when your current rate is close to today's rates. Also best for large amounts you'll repay over many years, because the rate is lowest and payments include principal.

HELOC

Best for flexible, repeated needs — renovations paid in stages, investment opportunities, or a safety reserve — when you can qualify and have the discipline to pay it down. Keep investment borrowing separate from personal spending: interest on money borrowed to earn income may be tax-deductible, and your accountant will want a clean trail.

Second mortgage

Best when your first mortgage has a rate or terms you don't want to lose, when breaking it would cost too much, or when credit or income make bank options unavailable. Plan the exit from the start: most second mortgages are meant to be repaid or refinanced at the first mortgage's renewal.

Readvanceable mortgages: combining the options

Many lenders offer a readvanceable mortgage, which combines an amortizing mortgage and a home equity line of credit under one registration. As you pay down the mortgage, the available credit on the line grows by the same amount. It's useful for homeowners who want ongoing access to equity — for staged renovations or investments — without reapplying each time. The line portion is still limited to 65% of the home's value, and the total stays within 80%.

How each option is qualified

A refinance and a HELOC from a federally regulated lender are qualified like a new mortgage: income verification, credit review, an appraisal and the federal stress test. A second mortgage from an alternative or private lender is assessed mainly on the equity in the home and your exit plan, with lighter income requirements. That's why second mortgages are often used when income is temporarily low, credit has been bruised, or time is short — and why they cost more.

Questions to ask before a private second mortgage

• What is the total cost over the term, including lender and broker fees?
• Is the loan interest-only, and is there a penalty to repay it early?
• What happens at the end of the term if I can't refinance yet?
• What exactly needs to change for me to move to a lower-cost lender?

If the answers aren't in writing, keep looking. Every fee must be disclosed before you commit.

A decision checklist

1. How much do you need, and for how long?
2. What would it cost to break your current mortgage today — and how far is your renewal?
3. Can you qualify for a HELOC or refinance under the stress test?
4. Will the money earn income (investment) or fund personal spending?
5. What is your plan to repay or refinance, and by when?

Costs that are easy to miss

• Notary fees: every new hypothec in Québec is registered by a notary.
• Appraisal: required for most refinances, HELOCs and second mortgages.
• Penalty method: large banks often calculate fixed-rate penalties using posted rates, which can make the interest-rate differential much larger than at monoline lenders. Run yours on the prepayment penalty calculator.
• Collateral charges: some HELOCs are registered for more than you borrow, which can make switching lenders later more involved.

Not sure which structure fits? Book an equity strategy review — we'll compare all three with fees, penalties and an exit date.