HELOC vs Refinance: Borrowing Against Your Home, Compared
Both turn equity into cash — one is a revolving line you draw and repay on your own schedule, the other is a new mortgage written for the full amount on day one. The right choice is mostly about how you'll actually spend the money.
Two ways to borrow what your home has earned
Equity is the part of your home you actually own — its value minus what you still owe. Two common tools turn that equity back into cash: a home equity line of credit (HELOC) and a refinance. Both are secured by your home, both are far cheaper than a credit card or an unsecured loan, and they work in almost opposite ways. The HELOC is a tap you turn on and off. The refinance is a bucket, filled once. Choosing well is mostly a matter of matching the tool to how the money will actually leave your hands.
First, how much is on the table. Across your mortgage and a HELOC combined, you can generally borrow up to 80% of your home's value. A standalone HELOC on its own is commonly capped at 65% of the value. So on a home worth $800,000 with a $400,000 mortgage, the combined ceiling is $640,000 — leaving up to $240,000 of borrowing room, subject to qualification. Those are the standard lending limits; your lender still has to approve you for the amount.
The HELOC: a line you draw on as you go
A HELOC is a revolving credit line secured by your home. You're approved for a limit, and you draw what you need, when you need it — by transfer, cheque or card, depending on the lender. The minimum monthly payment is typically interest only on whatever you've drawn, and anything you repay becomes available to borrow again. Nothing drawn, nothing owed: an untouched HELOC costs nothing to keep.
The price of that flexibility is a floating rate. HELOC rates are quoted as the lender's prime rate plus a spread, so your interest cost moves whenever prime moves — up as well as down. One popular variation bundles the HELOC with the mortgage in a readvanceable product: as you pay the mortgage down, your HELOC limit automatically grows by the same amount, inside the 80% combined ceiling. It's tidy, but it means your available credit grows every month whether you planned to use it or not.
The refinance: the money lands all at once
A refinance replaces your current mortgage with a new, larger one, and the difference arrives in your bank account as a lump sum. From that day you're paying interest on the whole amount, drawn or not — because there's no "undrawn." The loan can be fixed or variable, the payments are amortized like any mortgage, and the rate is a mortgage rate, which is typically lower than a HELOC's.
Two cautions ride along. If you're breaking your current term early to do it, a prepayment penalty usually applies — price it before you fall in love with the plan, using our guide to mortgage penalties. And if you're not sure a refinance is the right frame at all, note that at renewal time you have lighter options too — the distinctions are laid out in renewal vs refinance vs switch.
The two tools, side by side
| HELOC | Refinance | |
|---|---|---|
| Structure | Revolving line — draw, repay, redraw | New mortgage; the full amount lands at once |
| Rate type | Variable — floats with the lender's prime rate | Fixed or variable, at mortgage rates |
| Payments | Interest-only minimum on what you've drawn | Blended principal and interest, on the whole loan |
| Best for | Staged, uncertain, or recurring costs | One large, known cost, repaid on a schedule |
When each one wins
- A renovation in stages. The HELOC, usually. Contractor deposits, progress draws and the inevitable extras arrive over months; a line lets you borrow each chunk when it's billed instead of paying interest on the full budget from day one.
- One big, known cost. The refinance. A buyout, a cottage deposit, a single large purchase — you know the number, you get the number, and the amortized payment forces the repayment plan.
- Debt consolidation. Either can work, and the math is seductive: rolling card balances into secured borrowing cuts the interest rate hard. But consolidation only works if the cards stay at zero afterwards. A refinance at least buries the debt in a payment schedule; a freshly emptied HELOC sitting beside live credit cards is how people end up with both debts.
- An irregular income or a just-in-case cushion. The HELOC. It costs nothing while it sits unused, which no refinance can say.
Underneath all four sits the discipline question. A HELOC's interest-only minimum means the balance never has to shrink — you can make every payment on time for years and owe exactly what you borrowed. If you don't trust the plan to include voluntary principal payments, the refinance's built-in schedule is not a flaw; it's the point.
The cautions that apply to both
Whichever tool you choose, the debt is secured by your home: miss payments and the consequences reach further than a damaged credit score. Qualification is real for both — lenders test the fully drawn HELOC or the full new mortgage against your income, not the amount you plan to use. And with a HELOC, remember that the rate floats and lenders can typically reduce or freeze a line under the terms of the agreement; it's flexible credit, not a guaranteed one. What you'd qualify for, and on which property numbers, is the same homework lenders do at pre-approval — worth reviewing before you apply.
The bottom line
Choose the HELOC for money that goes out in stages or on an uncertain schedule, and the refinance for one known amount you'll repay on a forced schedule — and be honest about which kind of borrower you are. Both calculations start from the same two numbers: what you owe, and what the home is worth. Get the second one first with how a home's value is actually estimated, and the rest of the comparison does itself.
