The letter usually shows up about 60 days before your draw period ends. You’ve been paying $740 a month in interest on an $85,000 balance for years, and the new disclosure says the payment is moving to something closer to $1,100. That’s typically the moment a homeowner starts searching for a HELOC refinance.
It’s a sensible thing to investigate. It’s also easy to do badly. A line of credit and a first mortgage are different animals, and how you swap one for the other changes your rate, your closing costs, your tax picture, and how fast you build equity.
A HELOC Refinance Isn’t One Thing
The phrase gets used for three separate transactions. Which one you want depends on your equity, your credit score, and what you originally spent the money on.
Rolling the line into a new first mortgage
You refinance the primary mortgage for enough to cover both balances, and the HELOC gets paid off at closing. One payment, usually at a rate lower than the line carried.
Say you owe $300,000 on a first mortgage at 4% and $85,000 on the HELOC at 9.5%. Refinancing into a single $385,000 loan at 6.5% over 30 years gives you a payment around $2,430. Your old payments together were roughly $1,430 plus $670 interest-only, so about $2,100. The new payment is higher. That surprises people. But you’re now amortizing the entire balance, the rate is fixed, and the tax treatment may improve if the money went into the house.
Replacing the HELOC with a new HELOC
Sometimes the lender simply closes the old line and opens a new one, often with a promotional rate for the first year. Costs are low, sometimes zero, but you’re usually trading one variable rate for another. This works well if your balance is small and you plan to clear it in a few years.
Converting the balance to a fixed-rate home equity loan
A home equity loan is a closed-end second mortgage. You take the balance as a lump sum at a fixed rate and pay it down on a set schedule. No more exposure to prime rate moves. The trade-off is losing the revolving credit, which matters if you might need to draw again.
The Draw Period Ending Is What Pushes Most People to Act
During the draw period, most HELOCs let you pay interest only. That keeps the payment artificially small, and plenty of borrowers treat the minimum as the real cost of the loan.
Then the draw period closes. The balance re-amortizes over the repayment period, often 10 to 20 years, and the payment jumps. If the line sat interest-only for years with no principal paid, the shock is genuine. It’s the same trap that catches homeowners with interest-only mortgages, where getting out before the payment resets is far easier than catching up afterward.
Run the Break-Even Math Before You Sign
Refinancing a first mortgage typically costs 2% to 5% of the loan amount in closing costs. On $385,000, that’s somewhere between $7,700 and $19,000. A straight HELOC replacement is usually far cheaper, often a few hundred dollars or nothing at all.
To decide, you need:
- The new monthly payment versus the current one, using the recast payment rather than the interest-only minimum
- Total closing costs, itemized
- How many months until monthly savings cover those costs
- How long you actually expect to stay in the home
If break-even lands at 34 months and you’re likely to sell in two years, the math doesn’t work. If it lands at 18 months and you’re staying put, it probably does.
When Refinancing the Line Is the Wrong Move
- You’re eight years from paying it off and you’d stretch the balance across a fresh 30-year term. You’d lower the payment and pay far more interest overall.
- Your credit score dropped since you opened the line. You’d be refinancing into a worse rate than you already have.
- You’re within a year of selling. Closing costs won’t have time to pay for themselves.
- You’d be giving up a low fixed rate on your first mortgage just to absorb the HELOC. Sometimes a home equity loan on the line alone is cheaper than touching the first mortgage at all.
Your Loan-to-Value Ratio Drives the Rate You Get
Combined loan-to-value is the number lenders care about most when two liens sit on a property. Add the first mortgage and the HELOC together, divide by the home’s appraised value, and you have your CLTV.
Above 80%, expect a rate bump, mortgage insurance, or a lender that won’t touch the file. Below 70%, you’re in the sweet spot and can often negotiate. The mechanics behind how a large equity stake unlocks better rates apply just as much to a cash-out first mortgage as they do to a standalone second.
HELOCs on Rental Properties and Multi-Family Buildings
This is where things get more complicated. A line of credit secured by an investment property doesn’t get the same treatment as one on your primary residence. Rates run higher, lenders want to see lease agreements and cash reserves, and a handful of loan programs disappear entirely.
Documentation is the biggest issue. Lenders want to know the property is titled correctly, the rent roll is real, and you’re not living in a unit you claimed was tenant-occupied. Skipping that step is one of the mistakes landlords make with non-owner-occupied refinances.
If you own several rentals and each carries its own line, refinancing a multi-family property or consolidating into a single loan can simplify things enormously. One appraisal, one closing, one payment schedule to track.
Don’t Kill Your Interest Deduction by Accident
Interest on home equity debt is deductible only when the money was used to buy, build, or substantially improve the home that secures the loan. The combined limit for mortgage debt is $750,000 for married couples filing jointly.
A HELOC that paid for a kitchen gut and a new roof? Deductible. A HELOC that paid off credit cards or bought a truck? Not deductible.
Here’s the part that bites people. When you roll a HELOC into a new first mortgage, you have to track what portion of that new loan represents home improvement debt versus everything else. Keep the old statements and receipts. If the line funded a renovation, that paperwork matters even more, and the same issues come up with renovation loan refinances.
What Lenders Want to See Before They Approve
Approval is mostly about proving you can carry the new payment. Expect to provide:
- Two years of tax returns and recent pay stubs, or profit-and-loss statements if you’re self-employed
- Twelve months of payment history on the HELOC with no 30-day lates
- A current appraisal, unless you qualify for a waiver
- Reserves covering two to six months of payments
- Debt-to-income under 43% on the new payment, though some lenders stretch further with strong compensating factors
A rate lock typically holds for 30 to 60 days, so gather the documents before you shop. If the appraisal comes in low and your CLTV pushes past the limit, ask about a recast of the HELOC instead, or a modification that extends the repayment period. Both are quieter options than a full refinance, and neither costs 3% of the balance.