Updated September 02, 2026
Quick answer
A HELOC sits alongside your existing mortgage as a revolving second line, so a low rate you already hold is untouched. A cash-out refinance replaces the first mortgage entirely with a larger one. If your existing rate is below what the market offers today, refinancing to reach equity can cost far more over the remaining term than the HELOC's higher rate on a smaller balance.
The Question Is What Happens to Your First Mortgage
Both reach the same equity. The difference is what they do to the loan you already have.
A HELOC leaves it completely alone and adds a second, revolving line behind it. A cash-out refinance pays it off and replaces it with a single larger mortgage at today's rate on the whole balance.
That distinction is worth more than any rate comparison when you hold an older, cheaper mortgage. Refinancing to release equity re-prices every dollar you already owe, not just the new money.
Where the Cost Actually Lands
| HELOC | Cash-out refinance | |
|---|---|---|
| Existing mortgage | Untouched | Repaid and replaced |
| Rate applies to | Only what you draw | The entire new balance |
| Rate type | Usually variable | Usually fixed |
| Access | Revolving during the draw period | One lump sum |
| Closing costs | Lower | Full mortgage costs |
| Payments | Two | One |
The second row is the one that decides most cases. A HELOC prices only the money you actually use; a refinance re-prices the whole mortgage.
The Arithmetic Worth Doing
A worked shape rather than a rule. Suppose $200,000 remains on a mortgage taken at a low rate some years ago, and the business needs $60,000.
Under a HELOC, the $200,000 keeps its old rate and the higher HELOC rate applies to $60,000.
Under a cash-out refinance, all $260,000 sits at today's rate. If today's rate is meaningfully above the old one, the extra cost on the $200,000 you were not trying to borrow can exceed the entire cost of the HELOC.
Run it as total interest over the years you expect to hold the property, not as a monthly payment comparison. The monthly figure can favor the refinance while the total cost does not, because a refinance usually restarts the amortisation.
When the Refinance Still Wins
- Your existing rate is at or above today's. Then there is nothing cheap to protect and one loan is simpler.
- You want a fixed rate. HELOCs are typically variable, and a business plan that cannot absorb a rate rise is worth insulating.
- You need the full amount now. A refinance delivers a lump sum; a HELOC delivers a facility.
- You want one payment. Worth something, though rarely worth the arithmetic on its own.
- The draw period ending would leave you exposed — a fixed loan has no such transition.
Closing Costs Change the Threshold
Cost per dollar is only half the comparison. The fixed cost of getting the money decides whether a route is worth taking at all.
A cash-out refinance is a full mortgage transaction — origination, appraisal, title work, recording, and in some states transfer taxes. Those costs are broadly the same whether you release $40,000 or $200,000, which means they are trivial spread across a large release and punitive across a small one.
A HELOC is much lighter, and some lenders waive costs entirely in exchange for an early-closure fee if you shut the line within a set period. That is worth reading before assuming a no-cost line is genuinely free.
The practical effect: below a certain size, a refinance rarely makes sense however attractive the rate looks, because the closing costs consume the benefit. Work out the total cost including fees over your expected hold rather than comparing rates.
Both Put the House Behind the Business
Worth restating, because the comparison above is a cost analysis and cost is not the whole question.
Whichever route, the money is secured on your home and the purpose is business risk. A cash-out refinance arguably goes further, because it puts the whole mortgage into the transaction rather than adding a smaller second position.
Before optimising between them, it is worth checking the prior question: whether a business facility can do the job at a higher rate and leave the house out of it. See HELOC versus a business line of credit.
Frequently Asked Questions
Should I refinance my mortgage to fund my business?
Only if your existing rate is at or above today's. If you hold an older, cheaper mortgage, refinancing re-prices the entire balance rather than just the new money, and that extra cost can exceed the whole cost of a HELOC.
Which has lower closing costs?
A HELOC, generally and by a clear margin. A cash-out refinance is a full mortgage transaction with full mortgage costs, which is another reason it suits larger needs better than smaller ones.
Is a HELOC rate fixed?
Usually variable, where a cash-out refinance is usually fixed. If the business plan cannot absorb a rate rise, that difference matters and may outweigh the cost advantage.
Which gets me the money faster?
Both are mortgage-speed rather than days, but a HELOC is generally lighter and closes sooner. Neither is an emergency instrument.
Does a cash-out refinance restart my mortgage term?
Typically yes, and it is easy to miss. A lower monthly payment achieved by restarting amortisation can still mean more total interest, which is why the comparison should be run on total cost over your expected hold rather than on the monthly figure.
Sources & Further Reading
- CFPB: What is a home equity loan? — Consumer Financial Protection Bureau explainer on home equity borrowing, including how draw and repayment periods work.
- CFPB Mortgages — Guidance on mortgage products, the closing process and borrower protections.
- Federal Reserve Senior Loan Officer Opinion Survey — Quarterly survey of bank lending standards across consumer and commercial credit.
Figures above describe ranges commonly seen across lenders and reflect published guidance as of the date on this page. Confirm current terms with the cited source or your lender before acting.