HELOC vs Refinance vs Second Mortgage

By the Ottawa Mortgages editorial team · Last reviewed: September 2026 · How we write our guides

What is the difference between a HELOC, a refinance and a second mortgage? A HELOC is a revolving line of credit secured by your home, usually limited to 65% of its value. A refinance replaces your mortgage with a new, larger one, up to 80% of the value. A second mortgage is a separate loan behind your first mortgage, often used when you cannot refinance or want to avoid a penalty.

If you want to borrow against the equity in your Ottawa home, for renovations, debt consolidation or an investment, you have three main options. Each has different costs, limits and risks.

Side-by-side comparison

HELOCRefinanceSecond mortgage
How it worksRevolving credit you draw on as neededNew first mortgage replaces the old oneExtra loan behind your first mortgage
Typical borrowing limitUp to about 65% of home value (standalone), and combined with your mortgage up to about 80%Up to 80% of home valueCombined loans often up to about 80%, sometimes more with private lenders
RateVariable, usually above primeFixed or variable mortgage ratesHigher than a first mortgage
PaymentsOften interest-only on what you usePrincipal and interestOften interest-only, with a short term
CostsLegal and appraisal costs may applyPenalty on the old mortgage plus legal and appraisalLender and broker fees plus legal
Best forOngoing or flexible borrowing needsLower overall rate, large one-time needsAvoiding a first mortgage penalty, or credit challenges

When each option tends to make sense

  • HELOC: You need flexible access to funds and can discipline yourself to repay.
  • Refinance: The savings from a new rate or a consolidation outweigh the penalty and fees. See refinancing in Ottawa.
  • Second mortgage: A refinance would trigger a large penalty or you do not qualify for a bank product. See alternative lenders.

Risks to understand

  • Your home secures all of these, so missed payments can put it at risk.
  • Variable rates can rise, and interest-only payments do not reduce the balance.
  • Using home equity for spending can leave you with less flexibility later.

Frequently asked questions

Is a HELOC better than a refinance?

Neither is always better. A HELOC gives flexibility, and a refinance may give a lower fixed rate and structure. Compare total costs and your plans.

Do I have to pass the stress test for a HELOC?

Often yes, and lenders qualify you at a higher rate. Requirements vary by lender.

Can I have a HELOC and a mortgage at the same time?

Yes, many homeowners have a readvanceable mortgage or a separate HELOC, subject to combined borrowing limits.

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