HELOC vs Refinance vs Second Mortgage in Canada: Which Makes Sense?
Once you've built equity in your home, you have three main ways to access it without selling: a Home Equity Line of Credit (HELOC), a mortgage refinance, or a second mortgage. Each serves a different purpose and comes with different costs and risks. Choosing the wrong one is an expensive mistake.
Home Equity Line of Credit (HELOC)
A HELOC is a revolving line of credit secured against your home equity, typically at prime rate plus a small spread (currently prime + 0.5% at most major Canadian lenders). You borrow what you need, when you need it, and only pay interest on the outstanding balance. You can repay and re-borrow freely.
Key rules in Canada:
- Maximum combined loan-to-value (mortgage + HELOC) is 80% of your home's value.
- You must qualify under the stress test for the full HELOC limit, not just what you intend to draw.
- Interest rates are variable (tied to prime) — HELOCs don't have fixed-rate options.
- Most HELOCs are interest-only (you can choose to pay principal, but aren't required to).
Best for: Ongoing or uncertain expenses (home renovations you'll stage over time, an emergency fund backup, ongoing education or business costs). The flexibility to draw and repay as needed is genuinely valuable here.
Worst for: One-time large purchases where you want rate certainty. The variable rate means your interest cost is unpredictable, and interest-only payments can stretch the repayment indefinitely.
Mortgage Refinance
Refinancing replaces your existing mortgage with a new, larger one — the difference between the new balance and the old is paid to you in cash. You might refinance at renewal (zero penalty) or mid-term (penalty applies).
Key rules in Canada:
- Maximum refinanced amount is 80% LTV of appraised value.
- You must pass the stress test for the full new mortgage.
- Mid-term refinancing triggers a prepayment penalty — for fixed mortgages, this can be the IRD (often $15,000–$30,000+).
Best for: Accessing a large, defined amount at a fixed rate with a known repayment schedule. Debt consolidation (rolling high-interest debt into a lower mortgage rate). Funding a significant one-time purchase at renewal time, when there's no penalty.
Worst for: Mid-term if you have a large IRD penalty — the penalty can eat most of the benefit. Any situation where you're not confident you want the full amount at once.
Second Mortgage
A second mortgage is a separate loan secured against your home that sits behind your primary mortgage in priority. If you default, the first mortgage is repaid first; the second mortgage lender takes what's left. To compensate for that risk, second mortgages carry substantially higher interest rates — typically 8%–15% from alternative lenders, sometimes higher from private lenders.
Best for: Situations where you can't qualify for a HELOC or refinance due to credit or income issues, or when you're mid-term on a mortgage and the penalty to refinance is large but you urgently need funds. Second mortgages are a cost-of-last-resort tool.
Worst for: Long-term borrowing. The rate premium compounds painfully over time.
Side-by-side comparison
| Feature | HELOC | Refinance | Second Mortgage |
|---|---|---|---|
| Typical rate (2026) | Prime + 0.5% (~6.2%) | Best 5yr fixed (~4.9%) | 8%–15% |
| Rate type | Variable only | Fixed or variable | Fixed (typically) |
| Repayment structure | Interest-only minimum | Amortized (P+I) | P+I or interest-only |
| Break penalty | None (open) | Yes, mid-term | Varies (often 3 months) |
| Re-borrowable | Yes | No | No |
| Max LTV | 80% combined | 80% | 80–90% combined |
The decision framework
Start with cost: a refinance at renewal almost always offers the lowest rate. If you're mid-term, calculate the penalty against the rate savings and duration — use our refinance calculator for the breakeven analysis. If a HELOC rate is acceptable and you need flexibility, it beats a refinance on convenience. Second mortgages are the option of last resort.
