Second Mortgage vs HELOC in Canada: Which Is Cheaper in 2026

Equity check, September 27, 2026. Run the second mortgage vs HELOC question on a real file and the gap is wide. Borrowing $75,000 against your home costs roughly $309 a month on a home equity line of credit at an illustrative prime plus 0.50% — about $3,713 over twelve months — against roughly $11,993 all-in for a one-year fixed second mortgage at an illustrative 9.99%, once the lender fee, broker fee and legal cost land. That is an effective 15.99%. The line of credit is far cheaper. It is also the one most borrowers asking this question cannot get.

Below: how each is built, the twelve-month cost of $75,000 both ways, what happens if prime climbs from 4.45% to 4.70% and later 5.70%, and a decision rule for your file.

Two ways to borrow against equity, two different shapes

Tapping home equity in Canada comes down to two instruments that behave nothing alike. A home equity line of credit is revolving. You are approved for a limit, draw what you want when you want it, repay, and redraw without reapplying. The minimum payment is interest only on the balance actually drawn. The rate is variable, quoted as prime plus a spread, and prime at most Canadian lenders sits at 4.45% today. Qualifying is the hard part: a HELOC is almost always an A-lender product, wanting credit in good shape, verifiable income, debt servicing that passes a stress test, and a property the lender will register a revolving charge against. Setup costs are usually light, since many A lenders absorb the appraisal and legal work.

A second mortgage — sometimes marketed as a home equity loan — is the opposite in almost every respect. It is a lump sum, advanced once, at a fixed rate for a fixed term, and one year is the norm in the alternative space. Payments are commonly interest only, and the charge sits in second position behind your first mortgage, which pushes the lender's risk and the rate higher. Because B lenders and private lenders write these, a second mortgage reaches borrowers a HELOC would decline outright: bruised credit, self-employed income that does not document cleanly, a failed stress test, or a property outside an A lender's comfort zone. What you pay for that access is setup cost — a lender fee, a broker fee and legal work, deducted from the advance or added to the loan. Our breakdown of A lender vs B lender vs private lender in Canada covers who sits where.

Second mortgage vs HELOC: the twelve-month cost on $75,000

Read the assumptions first. The HELOC spread, the second mortgage rate and every fee below are illustrative assumptions, not quotes: prime plus 0.50% on the line, 9.99% on the second, a 2% lender fee, a 2% broker fee and $1,500 of legal. Pricing varies widely by file — loan-to-value, credit, income documentation, property type and province all move it, and private second-mortgage pricing in particular ranges well above these figures. The prime numbers are different: 4.45% is live today, while prime at 4.70% by end-2026 and 5.70% in 2027 is the market-implied path, a market expectation that can change rather than a forecast to bank on.

Borrowing $75,000, interest only	HELOC at prime + 0.50%	1-year fixed second mortgage
Rate (illustrative)	4.95% variable (prime 4.45%)	9.99% fixed for 12 months
Monthly payment	$309.37	$624.38
Twelve months of interest	$3,712.50	$7,492.50
Lender fee (2%)	$0	$1,500.00
Broker fee (2%)	$0	$1,500.00
Legal and registration	$0	$1,500.00
Total 12-month cost of credit	$3,712.50	$11,992.50
Effective annualized cost on $75,000	4.95%	15.99%
Cost if prime reaches 4.70%	$3,900.00 (5.20%)	$11,992.50, unchanged
Cost if prime reaches 5.70%	$4,650.00 (6.20%)	$11,992.50, unchanged

The number that matters is the effective rate. A 9.99% second mortgage is not a 9.99% loan when you hold it a year: $4,500 of fees on $75,000 adds six percentage points, so the money costs 15.99% over twelve months, or 17.01% against the $70,500 you net if fees come out of the advance. Carry it two or three years and the fee drag spreads out, which is why the term you need matters as much as the rate quoted.

What happens to each product if prime rises

This is the 2026 wrinkle in the second mortgage vs HELOC call. A HELOC reprices itself every time prime moves, with no renewal date and no conversation. On a $75,000 balance, the illustrative line goes from $309.37 a month at prime 4.45% to $325.00 at prime 4.70%, and $387.50 at prime 5.70%. Follow the market-implied path and a balance left outstanding over the next twelve months costs roughly $3,853 instead of $3,713. The fixed second does not move; its rate is locked for the term.

Be honest about the size of that effect. Even at prime 5.70%, the line costs $4,650 against $11,992.50, and prime would have to reach roughly 15.49% before a HELOC cost as much as this illustrative second mortgage. The case for a fixed second is not price; it is certainty, and access. On how prime feeds through to payments, see what happens to your payment if prime hits 4.70%.

How much equity each product will release

Structure limits the draw before pricing does. The revolving portion of a HELOC is typically capped at 65% of property value, with your first mortgage plus the line allowed up to 80% combined — anything above 65% must be amortizing term debt. Take an $800,000 home carrying a $400,000 first mortgage, at 50% loan-to-value:

• 65% of value is $520,000, so revolving HELOC room behind the first is $120,000.
• A $75,000 draw puts you at 59.4% loan-to-value, inside both caps.
• On a $500,000 first mortgage, the 65% cap leaves $20,000 of revolving room, and a second mortgage becomes the practical route to $75,000.
• Private lenders sometimes register past 80%; B lenders generally will not.

Which one is cheaper for your file

The cheaper product is the one you can qualify for; after that it depends on how you use the money.

The HELOC wins when your credit and documented income clear an A lender, combined loan-to-value sits under 65%, you want to draw in stages — a renovation paid in instalments, a bridge you expect to clear in months — and you intend to repay quickly. Drawing $75,000 and clearing it in four months costs about $1,238 in interest at 4.95% and nothing in fees, which no fee-bearing product matches.

The second mortgage wins when a HELOC is not available: credit an A lender declines, self-employed income, a failed stress test, or a property no A lender will take a revolving charge on. It also wins when you need the full amount in one advance with a defined exit — tax arrears, a consolidation, a construction draw — and when you want the rate fixed while prime may be climbing, since a one-year fixed second is a known cost from day one. Our walkthrough of what a private mortgage actually costs in Canada breaks the fee side down further.

Either way, a second mortgage at these rates is a bridge, not a destination. Build the exit in before you sign: a refinance into an A or B first mortgage, a sale, or a credit-repair window of twelve to eighteen months. Fixed rates have risen roughly 0.50% after the recent bond-yield surge, which changes that exit — see our rate alert on rising fixed mortgage rates.

The discipline problem nobody puts in the brochure

An interest-only minimum payment on revolving credit means the balance never falls. Pay $309.37 a month on a $75,000 HELOC at 4.95% for five years and you will have handed over $18,562.50 in interest and still owe $75,000. Nothing makes you repay principal, and nothing stops you redrawing what you repaid. The risk is behavioural, not arithmetic: a one-year second forces a decision at maturity, while a HELOC can sit near its limit for a decade. If you take the line, set your payment above the minimum, pick a date by which the balance must be zero, and treat the limit as a ceiling you do not revisit.

Common questions

Is a HELOC cheaper than a second mortgage?

On cost, almost always yes. On the illustrative numbers above, $75,000 costs 4.95% on a HELOC against an effective 15.99% on a one-year fixed second mortgage once a 2% lender fee, a 2% broker fee and $1,500 of legal are counted — roughly $8,280 more over twelve months. That only matters if both are open to you. For a borrower an A lender declines, the comparison is a second mortgage against doing nothing.

Can I get a second mortgage with bad credit?

Often yes, and it is one of the main reasons the product exists. Private second-mortgage lenders weigh the equity in the property and the credibility of your exit plan more heavily than the credit score, which is how they approve files a HELOC cannot. Expect that in both the rate and the fees, expect a short term, and expect to be asked how the loan gets repaid at maturity. No one can promise an approval before the file is reviewed.

Does a HELOC rate go up when the Bank of Canada raises rates?

Yes, and quickly. A HELOC rate is prime plus a spread, and lenders move prime within days of a Bank of Canada increase. The policy rate has been 2.25% since October 2025 with prime at 4.45%, but markets currently imply prime at 4.70% by end-2026 and 5.70% in 2027. On a $75,000 balance at prime plus 0.50%, that is $309.37 a month now, $325.00 at prime 4.70% and $387.50 at prime 5.70% — market expectations that can change.

What to do next

The second mortgage vs HELOC decision usually resolves itself once both numbers are in front of you, so get both. Apply for the HELOC first: if an A lender approves you at prime plus a modest spread, the question answers itself. If the line is declined or capped below what you need, price the second properly — ask for the rate, the lender fee, the broker fee, the legal cost and the total twelve-month cost of credit in dollars, then compare totals, not rates.

RateShop.ca is Canada's independent mortgage shopping and comparison marketplace, so A lender HELOC pricing, B lender seconds and private seconds go side by side for the same file instead of you taking one lender's answer as the market. Bring your property value, your mortgage balance, an honest read on your credit and what the money is for, and we will show you what each route costs in dollars.