The HELOC Number Everyone Ignores, And Why It Costs You More Than Prime Rate Changes
You refinanced at 5.79% in October 2025, saw prime hold steady at 4.45% from October 2025 through July 2026, and your HELOC balance is now costing you 6.45%. Something doesn't add up.
What most borrowers miss is the spread, the markup your lender charges on top of prime. That spread is not fixed. It varies by institution, by product, sometimes even by whether you opened the line with a mortgage package or standalone. As of April 2026, Canadian HELOCs carried spreads between 0.5% and 1.0% over prime, according to WealthNorth. If you locked in that HELOC in 2023 when spreads were wider, you might still be paying prime plus 1.25%, which means recent prime rate cuts bought you less breathing room than you thought.
A basis-point prime cut proportionately reduces your monthly interest cost. A quarter-point spread reduction saves you the same amount, permanently, regardless of where prime goes next.
That second lever is the one nobody checks.
Why lenders price the spread the way they do
A HELOC is unsecured beyond the initial equity test. You can draw and repay it freely. There's no term. No discharge date. The lender's risk doesn't end at closing. A fixed-rate mortgage amortizes, and the collateral stays locked. A HELOC can balloon to its limit, sit there for years, and the lender's capital is tied up at a spread they set years ago when their own funding costs were different.
So they price in a buffer. That buffer is the spread.
When the Bank of Canada was holding rates at 0.25% and every Big Six lender was fighting for volume, spreads compressed. Some products hit prime plus 0.5% for borrowers with strong credit and an existing mortgage relationship. When funding costs climbed and liquidity tightened in 2023, those same lenders widened spreads to 1.0% or more.
Now they're narrowing again, but not evenly. One institution might still be at prime plus 1.0% while another dropped to prime plus 0.6%. If you're carrying a $90,000 HELOC balance and comparing two offers, that 40-basis-point gap costs you $360 a year. Compounded over five years, it's real money.
The refinance math nobody runs
Here's the scenario most Cowichan Valley homeowners with equity are facing in 2026. You have $35,000 in credit card debt at 21%, a car loan at 7.8%, and $120,000 owing on your mortgage at 5.25%. You have $180,000 in available equity. You can refinance the mortgage up to 80% loan-to-value, roll in the high-interest debt, and lock a five-year fixed rate around 5.4%. Or you can open a HELOC at prime plus 0.75%, currently 5.2%, and keep the mortgage where it is.
The refinance wins if rates stay flat or climb. The HELOC wins if prime keeps dropping and you can pay the balance down aggressively within two years. But that decision hinges on the spread. At prime plus 1.25%, the HELOC starts behind. At prime plus 0.5%, it's competitive even if prime only drops another 25 basis points.
Most advisors frame this as a prime-rate bet. It isn't. It's a spread-and-discipline question.
What changed between 2023 and now
Lenders tightened HELOC access during the rate-hike cycle. OSFI's loan-to-value cap stayed at 65% at closing, but approval standards got stricter. Borrowers who qualified for $150,000 in available credit in 2021 were seeing $95,000 approvals on the same property in 2024, and the spread was wider.
By mid-2026, some of that tension has eased. Spreads narrowed as competition returned, but they didn't collapse back to 2021 levels. The institutions that pulled back aren't rushing back in.
If you're shopping a HELOC in Duncan or Airdrie today, you'll see offers ranging from prime plus 0.5% to prime plus 1.1%, sometimes at the same credit union depending on whether you bundle it with other products. That range is worth $300 a year per $50,000 drawn. On a $100,000 line, it's $600. Walk in assuming "prime plus a bit" and you've already lost the negotiation.
Ask for the spread in writing. Compare it against at least two other institutions. If the answer is vague or the rate sheet shows "prime plus up to 1.5%," that's the ceiling, not the floor, and you should be able to do better.
The prime rate will move. The spread you agree to now won't.
You refinanced at 5.79% in October 2025, saw prime hold steady at 4.45% from October 2025 through July 2026, and your HELOC balance is now costing you 6.45%. Something doesn't add up.
What most borrowers miss is the spread, the markup your lender charges on top of prime. That spread is not fixed. It varies by institution, by product, sometimes even by whether you opened the line with a mortgage package or standalone. As of April 2026, Canadian HELOCs carried spreads between 0.5% and 1.0% over prime, according to WealthNorth. If you locked in that HELOC in 2023 when spreads were wider, you might still be paying prime plus 1.25%, which means recent prime rate cuts bought you less breathing room than you thought.
A basis-point prime cut proportionately reduces your monthly interest cost. A quarter-point spread reduction saves you the same amount, permanently, regardless of where prime goes next.
That second lever is the one nobody checks.
Why lenders price the spread the way they do
A HELOC is unsecured beyond the initial equity test. You can draw and repay it freely. There's no term. No discharge date. The lender's risk doesn't end at closing. A fixed-rate mortgage amortizes, and the collateral stays locked. A HELOC can balloon to its limit, sit there for years, and the lender's capital is tied up at a spread they set years ago when their own funding costs were different.
So they price in a buffer. That buffer is the spread.
When the Bank of Canada was holding rates at 0.25% and every Big Six lender was fighting for volume, spreads compressed. Some products hit prime plus 0.5% for borrowers with strong credit and an existing mortgage relationship. When funding costs climbed and liquidity tightened in 2023, those same lenders widened spreads to 1.0% or more.
Now they're narrowing again, but not evenly. One institution might still be at prime plus 1.0% while another dropped to prime plus 0.6%. If you're carrying a $90,000 HELOC balance and comparing two offers, that 40-basis-point gap costs you $360 a year. Compounded over five years, it's real money.
The refinance math nobody runs
Here's the scenario most Cowichan Valley homeowners with equity are facing in 2026. You have $35,000 in credit card debt at 21%, a car loan at 7.8%, and $120,000 owing on your mortgage at 5.25%. You have $180,000 in available equity. You can refinance the mortgage up to 80% loan-to-value, roll in the high-interest debt, and lock a five-year fixed rate around 5.4%. Or you can open a HELOC at prime plus 0.75%, currently 5.2%, and keep the mortgage where it is.
The refinance wins if rates stay flat or climb. The HELOC wins if prime keeps dropping and you can pay the balance down aggressively within two years. But that decision hinges on the spread. At prime plus 1.25%, the HELOC starts behind. At prime plus 0.5%, it's competitive even if prime only drops another 25 basis points.
Most advisors frame this as a prime-rate bet. It isn't. It's a spread-and-discipline question.
What changed between 2023 and now
Lenders tightened HELOC access during the rate-hike cycle. OSFI's loan-to-value cap stayed at 65% at closing, but approval standards got stricter. Borrowers who qualified for $150,000 in available credit in 2021 were seeing $95,000 approvals on the same property in 2024, and the spread was wider.
By mid-2026, some of that tension has eased. Spreads narrowed as competition returned, but they didn't collapse back to 2021 levels. The institutions that pulled back aren't rushing back in.
If you're shopping a HELOC in Duncan or Airdrie today, you'll see offers ranging from prime plus 0.5% to prime plus 1.1%, sometimes at the same credit union depending on whether you bundle it with other products. That range is worth $300 a year per $50,000 drawn. On a $100,000 line, it's $600. Walk in assuming "prime plus a bit" and you've already lost the negotiation.
Ask for the spread in writing. Compare it against at least two other institutions. If the answer is vague or the rate sheet shows "prime plus up to 1.5%," that's the ceiling, not the floor, and you should be able to do better.
The prime rate will move. The spread you agree to now won't.
Sources
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