HELOC vs. Cash-Out Refinance
HELOC = flexible line of credit at variable rate. Cash-out refi = lump sum at a fixed rate, replacing your first mortgage. HELOC wins for unpredictable expenses; cash-out wins when current rates are at or below your first-mortgage rate.
The short answer
A HELOC, unless your existing mortgage rate is at or above the refinance rate.
This decision is almost never about the cash. It is about what happens to the mortgage you already have.
A cash-out refinance replaces your entire first mortgage at the new rate. If you are holding a loan from the low-rate years, you are repricing the whole balance to access a fraction of it — and that cost dwarfs the difference in headline rates between the two products.
The flip is clean: if your current rate is at or above what you can refinance into, the refinance improves the terms on the existing balance too, and it usually wins.
What it actually costs
A $250,000 mortgage at 3.5%, a $450,000 home, $50,000 of cash needed. HELOC at 9%, refinance at 7.2% with $6,000 of closing costs, measured over ten years.
| HELOC | $95,000 | Interest-only at $375/month, with the $50,000 principal still owed at the end. |
|---|---|---|
| Cash-out refinance | $186,592 | A $306,000 loan at 7.2% — the extra cost is repricing the $250,000 you already owed. |
The HELOC is cheaper by $91,592, and almost none of that gap is about the $50,000. Change the existing rate to 7.5% and the answer reverses.
Where people go wrong
- Comparing the monthly payments. The refinance payment covers the whole mortgage; the HELOC payment covers only the new borrowing.
- Forgetting that interest-only means the balance is still there at the end of the draw period.
- Not planning for the payment jump when the HELOC draw period converts to repayment.
- Assuming the interest is tax-deductible. It only is for home improvement, and only if you itemise.
Common questions
Which is cheaper overall?
It depends almost entirely on your existing mortgage rate. Below market, a HELOC is usually far cheaper because refinancing reprices your whole balance. At or above market, a cash-out refinance often wins because it improves the terms on the existing debt as well.
Is a home equity loan a third option?
Yes, and it is underrated. A fixed-rate second mortgage gives you a lump sum at a fixed payment while leaving your first mortgage untouched — the flexibility of a second lien without the variable-rate exposure of a HELOC. Lenders promote it least of the three.
How much can I borrow either way?
Cash-out refinances are generally capped near 80% loan-to-value; HELOCs commonly allow up to 85% combined. On a $450,000 home with a $250,000 mortgage that is roughly $104,000 by refinance or $132,500 by HELOC, both subject to a fresh appraisal.
| HELOC | Cash-Out Refinance | |
|---|---|---|
| Rate type | Variable (often Prime + 1-2%) | Fixed (matches mortgage) |
| How you receive funds | Line of credit you draw from over years | Lump sum at closing |
| Closing costs | $0-$500 typically | 2-5% of loan amount |
| Affects first mortgage | No (second lien) | Yes (replaces it) |
| Best for | Renovations, recurring expenses, safety net | Large one-time use (debt consolidation, big project) |
| Tax-deductibility | If used for home improvements | If used for home improvements |
| Risk if rates rise | Payment goes up | No change (fixed) |
| Time to close | 2-4 weeks | 30-45 days |
Choose HELOC if
- You want financial flexibility, not a lump sum.
- Your first mortgage has a low rate you do not want to lose.
- You expect to draw funds over multiple years.
- You have strong income and can absorb rate increases.
Choose Cash-Out Refinance if
- You need a large lump sum NOW (debt consolidation, major renovation).
- Current mortgage rates are at or below your existing rate.
- You want a single fixed monthly payment.
- You have 20%+ equity after the cash-out.
Run the numbers yourself
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