The Quick Read: A combined refinance is for homeowners who want one stable loan and can live with giving up the old first mortgage. Keeping the HELOC is for homeowners whose first mortgage is the best asset they own, and who only need to refinance it, or leave it alone, while the line stays open. These are two different transactions, not two versions of one. Which one wins depends on whether the HELOC lender will cooperate, how the HELOC was used, and how much the new loan costs against what you already have.
Here is the plain version. A combined refinance pays off both liens with one new first mortgage. Keeping the HELOC means refinancing only the first and asking the HELOC lender to stay in second place. One replaces your old loan entirely. The other leaves a third party with a vote.
Refinance savings and break-even estimate
The starting figures are an example value with a balance in proportion and a placeholder for costs. Replace them with yours, and enter the current rate from your statement.
Editable benchmark: 7.32% as of October 22, 2026 · Freddie Mac 30-year average via FRED®. A conventional market reference, not a refinance quote.
Illustrative starting assumptions: a $350,000 home value, a $245,000 current balance, a current rate you enter and a remaining term seeded at twenty-five years, closing costs seeded at $5,000 as an editable placeholder (not a fee quote) and rolled into the new loan, a thirty-year term at the current Freddie Mac benchmark, and property taxes and insurance estimated at typical national rates. Every field is editable.
Illustrative estimate only — not a Loan Estimate, approval, quote, or commitment to lend. The new rate field carries the weekly Freddie Mac thirty-year conventional benchmark, a market reference and not a refinance quote; a refinance is priced by the lender at lock, and the current rate, the remaining term and the closing costs are figures you enter. The current payment is estimated from the balance, the current rate and the remaining term; the break-even divides the closing costs by the monthly saving and ignores the interest effect of a longer term. On the VA IRRRL the funding fee is added to the loan unless the veteran is exempt. Taxes and insurance are editable estimates. Licensed in sixteen states for consumer mortgages; Lendmire is a broker, never the lender.
Side-by-Side
| Factor | Combined refinance | Keep the HELOC |
|---|---|---|
| What happens to the old first | Paid off and replaced | Refinanced, or left untouched |
| What happens to the HELOC | Paid off at closing | Stays open and must be subordinated |
| Loan type if HELOC wasn't purchase money | Cash-out | Rate-and-term, if no extra cash taken |
| Leverage, one-unit primary home | 80% LTV on conventional cash-out | Up to 95% on rate-and-term, with the HELOC counted in combined leverage |
| Seasoning | First being paid off must be 12 months old | Applies to the first only if cash-out |
| Mortgage insurance | Rarely above 80% on cash-out | Required above 80% LTV |
| Outside approval needed | None | HELOC lender must agree |
| Future flexibility | Revolving line is gone | Line stays, but can be frozen |
| Occupancy | Primary residence lanes shown | Primary residence only |
Every figure above is a guideline for primary residences and is subject to lender guidelines and full file review. Second homes and rentals carry lower leverage limits, and occupancy decides which limit applies.
First, What "Combining" Actually Means
Nothing merges. A new lender writes a brand-new first mortgage. At closing, that loan pays off your old first and your HELOC. Both old liens are released, and the new one sits alone in first position.
That one fact explains most of the tradeoffs. You do not get to keep the low first mortgage and also fold in the HELOC. The old first is gone the day the new loan funds.
Across the wholesale programs Lendmire places files with, the classification is where borrowers get surprised. Under Fannie Mae's Selling Guide, paying off a purchase-money second with no cash out is a limited cash-out refinance. Paying off a second that did not buy the home makes the whole loan a cash-out refinance, even if you take no cash at closing.
Most HELOCs are not purchase money. Many were opened later for a roof, a kitchen, or a rainy day. So many combined refinances land in cash-out territory, with the tighter leverage and seasoning that come with it.
Why the Low First Mortgage Is the Pivot
A combined refinance reprices the whole balance. Keeping the HELOC reprices only the slice you borrow against the line. If your first mortgage is cheap, that difference is the whole story.
Think of the household cost as a weighted mix. You have the old first at its cost, plus the HELOC on whatever balance you carry. Compare that mix with one new loan covering everything, plus its closing costs. If the new loan is not clearly better across the years you expect to stay, the combination loses.
There is no universal answer here. A small HELOC balance on a very low first mortgage usually argues against combining. A large, variable-cost HELOC balance on a first mortgage near today's market costs argues the other way. Run it on your own numbers, with closing costs spread across your realistic holding period.
HELOC payments are not fixed. Fannie Mae's rules acknowledge that payments on subordinate financing may vary. That variability is part of the household cost, so test it, don't ignore it.
When Combining Is the Better Fit
Combining makes sense when stability matters more than the old loan's cost. A few situations point that way:
- Your first mortgage is not much cheaper than what's available now. You give up little by replacing it.
- Your HELOC balance is large relative to the first. The more you owe on the line, the more a single fixed loan changes your monthly picture.
- Your draw period is ending. When a line converts to repayment, payments can jump. One new loan removes that cliff.
- Your HELOC lender will not subordinate. If the lender refuses to stay in second position, the choice may be made for you.
- You want one payment and one lender. Simplicity has real value, though it is not free.
On that point, the Consumer Financial Protection Bureau says the HELOC lender may have to approve a first-mortgage refinance and can refuse. If it does, you may need to pay off the HELOC to refinance at all.
Before you commit, know the costs. You pay closing costs on the full new loan. You reset the term. You give up the old first mortgage for good. And if the HELOC was not purchase money, you are in cash-out rules, which typically cap a one-unit primary home at 80% LTV on a conventional loan. The first mortgage being paid off must also be at least 12 months old, measured note date to note date, per the Fannie Mae cash-out guidelines. That 12-month test does not apply to subordinate liens being paid off.
Freddie Mac sets its own cash-out conditions. Its cash-out page calls for six months on title and a new appraisal and inspection report, with no seasoning on inherited homes. Some borrowers can reach a wholesale lane with no mortgage insurance, with leverage just under 90% LTV. That lane requires a 680 score, a 50% ratio, a thirty-year fixed loan, a primary residence, a conforming balance, and its own six months of seasoning. It is not written on Texas homesteads. Each figure is subject to lender guidelines and a complete review of property type, leverage, and credit.
When Keeping the HELOC Is the Better Fit
Keeping the line wins when the old first mortgage is the prize. If it is cheap, replacing it is the most expensive move on the board. You would pay to reprice a balance that did not need repricing.
This path fits when:
- Your first mortgage is well below market cost. Protect it.
- Your HELOC balance is small or manageable. Paying it down on its own schedule may beat refinancing around it.
- You want revolving access to equity. A combined refinance hands you a lump sum, then the line is gone.
- You may not need to refinance at all. Leaving both loans alone is a legitimate fourth path.
Keeping the HELOC has a catch. Fannie Mae requires a recorded resubordination agreement, with one exception: where state law lets the second lien keep its junior position behind the refinanced first. Don't count on that exception; ask your lender whether it applies to your situation.
Underwriting also counts the HELOC. Lenders calculate LTV, CLTV, and HCLTV when subordinate financing exists. CLTV adds all the liens together against the home's value. HCLTV does so using the line's credit limit. Some summaries say an unused line still counts at its full limit. Treat that as likely and confirm it with your lender, because a zero balance may not mean zero leverage.
One more risk sits outside your control. Per the CFPB's HELOC booklet, HELOC terms matter if home values or finances change. Confirm with your own lender whether it can freeze or reduce your line. A line you were counting on may not be there when you need it.
What the HELOC Lender Decides
Subordination is where the plan succeeds or stalls. You ask the HELOC lender to sign a subordination or resubordination agreement. The new first-mortgage lender or the title company usually requests it. The HELOC lender can say yes, say no, or take its time.
Timing and fees vary by lender. No official average exists, so plan around uncertainty. If you are working to a deadline, that dependence on a third party is a real cost.
When the HELOC lender refuses, you have three roads. Pay the line off from savings. Pay it off through a combined refinance. Or skip the refinance and stay put. None of them is a failure. They are just a different order of operations.
What About FHA and VA?
If your current first mortgage is FHA or VA, the streamline programs are built to refinance that existing loan alone. They are not built to absorb a HELOC.
The FHA Streamline refinances an existing FHA loan with no appraisal, limited credit review, and a net tangible benefit test. Per HUD's reference guide, streamline transactions involve the FHA-insured first mortgage only. The HELOC would need to stay and be resubordinated.
The VA IRRRL has a similar structure. Per VA, no loan other than the existing VA loan may be paid from IRRRL proceeds, and the borrower cannot receive cash from it. If there is a second mortgage, its holder must agree to subordinate so the new VA loan is a first mortgage. Typical features include a 0.5% funding fee unless exempt, no VA appraisal, a net tangible benefit test, and seasoning of the later of 210 days and six payments.
If you want to consolidate a HELOC, a streamline is the wrong tool. A cash-out refinance is the right one, and it means giving up the streamline's simplicity. Above the conforming loan limit, jumbo programs take over. They generally start at a 660 decision score and may reach 90% leverage, with loans to $5,000,000 and a 50% ratio ceiling on the fixed lanes.
The Purchase-Money Exception
There is one clean exception. If your second lien was used to buy the home, it can be paid off in a limited cash-out refinance. Per Fannie Mae's limited cash-out section, only subordinate liens used to purchase the property may be paid off and included in the new mortgage.
This is the "piggyback" setup some buyers used to avoid mortgage insurance. If that describes you, a combined refinance may stay in the rate-and-term lane, where leverage limits sit well above the cash-out cap. Mortgage insurance applies above 80% LTV. It cancels on request at 80% and ends automatically at 78%. Lenders typically verify purchase-money status from your purchase settlement statement or title policy. Cash back is limited to a small, capped amount.
A Simple Decision Grid
| Your situation | Lean toward |
|---|---|
| Very low first mortgage, small HELOC balance | Keep both, or pay the line down |
| First near today's market, large HELOC balance | Combined refinance |
| Draw period about to end, balance large | Combined refinance |
| HELOC lender won't subordinate | Combined refinance, or leave as is |
| Existing FHA or VA loan, HELOC stays | Streamline the first only |
| Want flexible access to equity later | Keep the HELOC |
| HELOC was purchase money | Combined refinance may stay rate-and-term |
| Combined leverage is high | Keep both, since cash-out limits may bind |
These are leanings, not rules. Your credit, income, equity, and combined leverage can change the answer.
How to Run Your Own Break-Even
Four steps get you most of the way, with no tool needed:
1. List the current cost of both loans. Write down the old first and the HELOC at their actual balances and costs.
2. Get a full quote on the combined loan. Ask for the Loan Estimate, which itemizes closing costs.
3. Spread those closing costs across how long you expect to stay. A short stay punishes a refinance.
4. Compare the weighted old cost against the single new loan. Include a term reset and any change in payment stability.
If the combined loan is not better by a clear margin over your realistic stay, keep what you have. This is a judgment call, and the answer changes with each borrower. Some homeowners come out ahead combining. Many with a very low first mortgage do not.
Common Mistakes
- Assuming the HELOC rolls into a rate-and-term loan. It does only if it was purchase money.
- Assuming the HELOC lender must cooperate. It need not.
- Forgetting the unused line. Leverage may count the full limit.
- Assuming a streamline absorbs the HELOC. It does not.
- Assuming combining is always cheaper. No rule says so, and giving up a low first mortgage is its own cost.
The Verdict
Neither option wins by default. Combine when stability, simplicity, or an ending draw period matter more than the old loan's cost, and when you are comfortable with cash-out rules. Keep the HELOC when the first mortgage is a real asset, the balance is small, or you value the open line.
If you are still stuck, the honest middle path is often to leave the first alone and pay the HELOC down. It is the least exciting answer, and frequently a more affordable one. Lendmire's refinance programs page shows how the rate-and-term and cash-out lanes differ.
If you are weighing a refinance and want the break-even run on your own numbers, Lendmire can help you compare the programs on the same home. Every figure here is subject to lender guidelines and full file review, and nothing is a commitment to lend.
Key Terms Defined
Subordination: The HELOC lender agrees to stay in second position behind a new first mortgage.
CLTV: Combined loan-to-value, which adds every loan secured by the home and divides by its value.
HCLTV: CLTV measured using a HELOC's full credit limit, not only the drawn balance.
Limited cash-out refinance: A refinance that pays off the first mortgage, closing costs, and any purchase-money second, with only small cash back.
Seasoning: The minimum time a loan or ownership must have existed before you refinance.
Frequently Asked Questions
Can I roll my HELOC into a rate-and-term refinance?
Only if the HELOC was used to buy the home. Otherwise paying it off makes the new loan a cash-out refinance, even if you take no cash. Cash-out loans carry tighter leverage and seasoning rules.
Does the HELOC lender have to agree to stay in second position?
No. The lender can refuse. If it does, you may have to pay off the HELOC to refinance the first. That is why many borrowers ask for the lender's subordination process before choosing a path.
Does an unused HELOC count against my leverage?
Often yes. Lenders calculate combined leverage including subordinate liens, and some measure a HELOC by its full limit. Confirm with your lender how it counts a line you have not drawn on.
Can an FHA Streamline or VA IRRRL pay off my HELOC?
No. Both refinance only the existing government loan, and the HELOC holder must agree to subordinate. To consolidate the HELOC, you would need a different product, such as a cash-out refinance.
Is combining always cheaper than keeping two loans?
No. A combined refinance replaces the whole first mortgage, so a low first mortgage is lost. Closing costs apply to the full new loan. Compare the weighted cost of what you have against the single new loan over your expected stay.
For your own numbers, request a scenario review with Lendmire.
About Lendmire
Lendmire is a mortgage brokerage (NMLS# 2371349) licensed for consumer mortgage lending in 16 states, arranging FHA, VA, conventional and jumbo purchase and refinance loans through a wholesale lending network. Eligibility is determined by the lender on each file. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
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References
1. Fannie Mae Selling Guide B2-1.2-04, Subordinate Financing
2. Consumer Financial Protection Bureau
3. Fannie Mae Selling Guide B2-1.3-03, Cash-Out Refinance Transactions
4. Freddie Mac Cash-out Refinance
6. HUD reference guide on refinances
7. Fannie Mae Selling Guide B2-1.3-02, Limited Cash-Out Refinance Transactions
This article is part of Lendmire’s HELOC & home equity loan program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: How to Remove an Ex From a Mortgage When a Refinance Falls Short · How a Lender Counts a HELOC Balance in a Refinance Payoff · HELOC Into First Mortgage Refinance Requirements and Limits
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
- Mortgage Loan Originator · NMLS# 1129696 · Verify on NMLS Consumer Access
- North Carolina Real Estate Broker · License# 343312 · Verify on NCREC
- North Carolina Insurance Producer · License# 19053198 · Property, Casualty, Life, Health · Verify on NAIC SBS
- Lendmire LLC · Firm NMLS# 2371349 · Verify firm licensure
Legal disclosures. Lendmire (NMLS# 2371349) is a state-licensed mortgage brokerage that arranges financing through wholesale lender relationships. Lendmire is not a direct lender, depository institution, or registered financial advisor. The discussion above is general informational content about real estate financing — it is not financial, legal, or tax advice, and readers should consult licensed professionals for guidance on their individual circumstances. Loan inquiries are subject to lender underwriting; this article does not represent a commitment to lend. Loan terms, rates, and qualification standards vary by borrower, property, and state, and are subject to change at any time. Equal Housing Opportunity. NMLS Consumer Access: nmlsconsumeraccess.org.