Yes, rolling a HELOC into a mortgage is a normal refinance: a new first mortgage pays off both your existing mortgage and your HELOC balance at closing, leaving you with one loan and one monthly payment. The catch is that your lender won’t treat this as a simple swap. How you originally spent the HELOC money decides whether the new loan is priced as a limited cash-out refinance or a cash-out refinance, and that single classification drives your interest rate, your maximum loan size, and whether the interest stays tax-deductible.
How You Spent the HELOC Decides the Deal
Before you shop rates, pull your HELOC statements and figure out where every draw went. Lenders split these refinances into two buckets based on the original use of the funds, and the pricing gap between them is real money.
If the HELOC was used entirely to buy the home, the refinance typically qualifies as a limited cash-out refinance under Fannie Mae guidelines. That’s the favorable bucket: better interest rates and a loan-to-value ceiling up to 97% on a one-unit primary residence.1Fannie Mae. Limited Cash-Out Refinance Transactions
If any portion of the HELOC went to something other than acquiring the property, the entire refinance is classified as cash-out. It doesn’t matter whether the non-purchase spending was a kitchen remodel, a tuition bill, or a credit card payoff. Once a non-acquisition dollar was drawn, cash-out rules apply to the whole transaction: LTV capped at 80% on a one-unit primary residence, and a rate premium that commonly runs a quarter to a half point above limited cash-out pricing.2Fannie Mae. Eligibility Matrix Investment properties and multi-unit homes get tighter caps still, in the 70% to 75% range.
What It Costs to Close
Refinancing isn’t free. National averages for total closing costs land somewhere between $2,400 and $5,000, with wide variation by loan size, state, and lender. The main line items:
- Appraisal fee: $350 to $600 for a standard single-family home; complex or high-value properties run higher.
- Origination fee: 0.5% to 1% of the loan amount. On a $350,000 refinance, that’s $1,750 to $3,500.
- Title insurance: a new lender’s policy is required because your prior policy expired when the old mortgage was paid off. Ask about a reissue discount if you can produce the old policy.
- Recording fees: charged by the county to record the new mortgage and the lien releases; amounts vary by jurisdiction.
- HELOC early closure fee: often $200 to $500 if the account is relatively new. Many lenders waive it after three to five years, so check your HELOC agreement.
“No-closing-cost” refinances usually aren’t free either. The costs get built into a higher rate, and whether that swap works for you depends on how long you keep the loan.
What You Need to Qualify
Lenders look at your combined loan-to-value ratio: the new first mortgage plus any remaining liens divided by the appraised value of the home. For a cash-out refinance on a one-unit primary residence, Fannie Mae caps the CLTV at 80%.2Fannie Mae. Eligibility Matrix A limited cash-out refinance stretches that ceiling to 97% on a primary residence.1Fannie Mae. Limited Cash-Out Refinance Transactions
Push past 80% LTV and you’ll pay private mortgage insurance. PMI generally runs 0.30% to 1.15% of the loan amount per year, priced off your credit and equity. On a $400,000 loan, that’s roughly $100 to $380 tacked onto your monthly payment. PMI can be canceled once your LTV reaches 80% based on the original property value.3Fannie Mae. Termination of Conventional Mortgage Insurance
Your debt-to-income ratio should generally sit at or below 43% under the federal Ability-to-Repay rules.4Consumer Financial Protection Bureau. Summary of the Ability-to-Repay and Qualified Mortgage Rule Some lenders will stretch higher for borrowers with strong cash reserves or thin other debts, but 43% is the underwriter’s default line.
On credit, Fannie Mae dropped its hard 620 minimum score in November 2025. Desktop Underwriter now evaluates the full financial picture instead of rejecting at a bright line. That doesn’t mean weak credit gets a pass. Borrowers above 740 still get the sharpest pricing, and scores below 680 will see materially higher rates and fees.
For documentation, expect to provide a formal payoff statement from your HELOC lender showing the exact amount to close the account on a specific date, plus a matching payoff for your first mortgage. Truth in Lending requires the payoff to reflect interest accrued through the payoff date.5eCFR. 12 CFR Part 1026 – Truth in Lending, Regulation Z W-2s and a recent pay stub cover most wage earners; self-employed borrowers need full federal tax returns with Schedule C or Schedule K-1.6Fannie Mae. Standards for Employment and Income Documentation
Will the Interest Still Be Deductible
The same question about how you spent the HELOC also decides your tax treatment. Under current law, made permanent by the One Big Beautiful Bill Act, mortgage interest is deductible only on debt used to buy, build, or substantially improve the home securing the loan.7Internal Revenue Service. Real Estate Taxes, Mortgage Interest, Points, Other Property Expenses 2
If your HELOC funded home improvements or the original purchase, the interest on the consolidated loan generally remains deductible, subject to the $750,000 acquisition-debt cap ($375,000 for married filing separately).8Internal Revenue Service. Publication 936, Home Mortgage Interest Deduction If part of the HELOC paid off credit cards or covered personal expenses, the share of the new mortgage attributable to that spending is not deductible. Refinancing doesn’t launder the original use. The IRS traces through to what the money actually bought.
The Subordination Alternative
Consolidating isn’t the only move. If you want a better rate on the first mortgage but aren’t ready to close out the HELOC, you can refinance the first mortgage alone and ask your HELOC lender to sign a subordination agreement.
The mechanics matter. When your old first mortgage gets paid off, the HELOC becomes the oldest recorded lien and would automatically jump to first position. No new lender will fund a loan sitting behind an existing debt, so the HELOC lender has to agree in writing to stay in second position behind the new mortgage. Most will subordinate as long as the combined balances stay within a reasonable share of the home’s value. The refinancing lender usually drives the paperwork; if the HELOC lender is slow, your closing slips.
Your Three-Day Right to Cancel
Because a refinance takes a security interest in your primary residence, federal law gives you a three-business-day window after closing to cancel the transaction for any reason. The clock starts on the latest of: closing, delivery of the rescission notice, or delivery of all required disclosures.9Consumer Financial Protection Bureau. 12 CFR 1026.23 – Right of Rescission If the lender fails to deliver proper notice or disclosures, that right extends to three years.
Practical consequence: your loan doesn’t fund until the window closes. Weekends and federal holidays don’t count as business days, so a Wednesday closing typically disburses the following Monday. The right of rescission applies only to primary residences, not second homes or investment properties.
Running the Break-Even
The math is straightforward. Add up every closing cost. Calculate the difference between your current combined monthly payment on the mortgage and HELOC and the projected single payment on the new loan. Divide costs by monthly savings and you get the number of months to break even. Plan to stay past that point and the deal works. Plan to move before it and you lose money.
Rate type matters too. Most HELOCs carry variable rates tied to prime, so your payment moves whenever short-term rates move. Rolling that exposure into a fixed-rate mortgage removes the uncertainty, which some borrowers value on its own even when the raw month-one savings are modest. The reverse case: if your HELOC balance is small and you can retire it in a year or two, refinance closing costs will likely swamp any interest savings. Sometimes the smarter play is to accelerate payments on the HELOC and leave the first mortgage where it is.