The Quick Read: Yes, a HELOC can cost more than a cash-out refinance, though that is the exception rather than the default, and it happens when the cash you need is large compared with the first balance, when the first loan’s rate sits close to current market levels, or when the floating-rate line stays drawn for many years. A HELOC prices only the new money and leaves the old loan alone. A cash-out refinance reprices every dollar you owe.
- A HELOC usually wins when your first mortgage is cheap and your cash need is small relative to it.
- A HELOC usually loses when the cash need is large, the first mortgage is near market, or the balance sits for a long time.
- The comparison that matters is the blended cost of keeping the first loan plus the HELOC, against one new loan on the full balance.
- Fees, points, and the repayment-period payment jump sit outside the stated rate and can flip a close call.
- On a rental, eligibility often decides the question before cost does.
What Do You Actually Give Up in a Cash-Out Refinance?
You give up the old loan’s interest rate on the entire balance. A cash-out refinance pays off the first mortgage and replaces it with one larger loan, and the new rate applies to all of it.
How large a line the equity supports.
An equity line is sized by combined loan-to-value, occupancy, and credit — not by rental coverage. Switch the occupancy or the credit band and the ceiling moves with it.
Investment-property lines require a 700 minimum credit score; second-home lines start at a 640 minimum and primary-residence lines at 600, and the combined-LTV ceiling steps down as the credit band drops on primary-residence and second-home lines and holds on investment-property lines; the line cap steps down on primary-residence lines and holds at every tier on investment-property and second-home lines.
A debt-to-income ratio above 45% requires 680+ credit. Profiles under 640 are limited to single-family homes. At least 75% of the approved line is drawn at closing. Ceilings, floors, and caps update from Lendmire’s centralized guideline source.
Line estimate
Illustrative estimate only — not a quote, Loan Estimate, approval, or commitment to lend. The rate is an editable assumption; equity-line pricing is variable through both the draw and repayment periods and never converts to fixed. Occupancy and credit drive the ceiling together: an investment property tops out at 70% combined LTV (minimum credit 700, line cap $500,000); a second home tops out at 90% combined LTV (minimum credit 640, line cap $500,000), with the ceiling stepping down as the credit band drops (the cap holds at every tier); a primary residence tops out at 90% combined LTV (minimum credit 600), and its $750,000 maximum line is available only at 75% combined LTV or below with a 700-or-better credit profile (720 on the longer-runway program) and a full appraisal. Lines above $500,000 require a full appraisal. Credit, debt-to-income, property type, and full underwriting review all affect the final line.
Treat a cheap first mortgage as an asset. Its value is roughly the gap between your rate and the market rate, multiplied by the balance, multiplied by the years left. A big balance with a wide rate gap and a long runway is a valuable asset. A small balance with a narrow gap is not.
That framing explains why the answer swings so widely. Two investors can both hold a low first mortgage and reach opposite conclusions. One owes a lot at a rate far below the market. The other owes a modest amount at a rate close to the market.
A HELOC leaves the asset intact. It adds a second loan on top, so you keep the cheap rate on the old balance and pay a higher rate on the new money only. That higher rate is the price of keeping the asset.
How Do You Compare the Two Honestly?
Compare the blended cost of the HELOC route against the single-loan cost of the refinance route. The blended cost is a weighted average. Multiply each balance by its rate, add the results, and divide by the total debt.
Here is the shape of it. Picture an investor whose cash need equals about a tenth of the first balance. The HELOC’s higher rate touches only that tenth, so the blend stays close to the cheap first-loan rate. The refinance route reprices the other nine-tenths for the sake of the cash.
Now stretch the example. Say the cash need equals half the first balance. The higher rate now covers a third of all the debt. The blend climbs, and the gap between the two routes narrows. Push the cash need higher still, and the refinance can come out ahead.
The size of the cash need relative to the first balance is the biggest driver in this math. Rates matter, but the ratio comes first.
A blended rate is still an incomplete answer. It is a weighted average, not a full cost. It leaves out these items:
- Closing costs and points on the refinance.
- Fees on the HELOC, such as application, appraisal, title, annual, or early-closure charges.
- Any prepayment penalty on the old first mortgage.
- The cost of holding a floating rate for as long as the balance is carried.
Add those before you decide. The calculator on this page can give you an illustrative estimate of how the pieces fit together. It is a starting point and not a quote.
When Does a HELOC Cost More?
A HELOC costs more when the higher rate applies to a large share of the debt, when that rate floats upward, or when the balance lingers. Six conditions account for most of the cases.
1. The cash need is large relative to the first balance. The second lien’s rate carries more weight in the blend as it grows. At some ratio, repricing everything is cheaper than keeping the old loan.
2. The first mortgage is close to market. If your first-loan rate is not far below what a new loan would cost, you have little asset to protect. Keeping it saves little, and the HELOC’s higher rate can outweigh the savings.
3. The line floats and the index rises. Most HELOCs carry a variable rate. The CFPB’s HELOC explainer notes that payments may change from month to month. It also notes that some plans let you convert part of the balance to a fixed rate, which usually costs more than the variable one. On this network, investment lines do not convert (more on that below).
4. The repayment period starts. Many lines allow interest-only payments during the draw period, with nothing going toward principal, and then shift into repayment. The CFPB’s HELOC brochure describes that later phase. The payment jump at the switch can strain cash flow, and a high-cost, floating-rate balance is then paid down on a fixed schedule.
5. The balance stays outstanding for many years. A refinance spreads its closing costs over the life of the loan. A floating-rate second lien accrues its higher cost for as long as you carry it. Over a long hold, the refinance’s upfront cost can look small by comparison.
6. You know exactly what the money is for. If the use is identified and immediate, such as a purchase or a defined rehab, a single fixed loan with a long term can beat a floating line. The flexibility you are paying for goes unused.
The reverse conditions favor the HELOC. A small, staged, or uncertain cash need, a first mortgage well below market, and a shorter payoff horizon all point toward keeping the first loan.
Side by Side: HELOC vs. Cash-Out Refinance
| Factor | HELOC | Cash-Out Refinance |
|---|---|---|
| Your first mortgage | Stays in place | Paid off and replaced |
| What gets repriced | New money only | The whole balance |
| Payment style | Two payments | One payment |
| Rate behavior | Usually floats | Often fixed |
| Upfront cost | Varies by lender | Closing costs on full loan |
| Main risk | Floating rate, payment jump | Losing a cheap first loan |
| Best fit | Small or staged need | Large, known need, long hold |
What About Fees the Stated Rate Hides?
The stated annual cost on a HELOC understates the true price. A refinance carries its own costs, so compare the full cost of each, not the stated rate alone.
Low-cost and no-cost HELOCs deserve a second look. Costs that are waived at opening are sometimes recovered if you close the line early. That matters when you plan to refinance the first mortgage later, since closing out the line may trigger the payback.
Lenders may stop advances under certain conditions. Treat the line as available credit that can be frozen, not as guaranteed cash. If a rehab depends on the next draw, that risk is yours.
Does the Investor Version Change the Answer?
Yes, because eligibility often decides the question first. Most home equity lines are written for owner-occupied homes. Lenders offering lines on rental properties are fewer, and their rules are narrower.
Across the wholesale network Lendmire works with, the investment-property parameters look like this. They are typical guidance, subject to lender guidelines and full file review:
- Ceiling: 70% combined loan-to-value (CLTV) on an investment property. CLTV counts the first mortgage plus the new line against the property’s value.
- Credit: a minimum score of 700 on an investment property.
- Line size: up to $500,000 total on an investment property.
- Structure: a standalone line in first or second lien position, with a 5-year interest-only draw followed by a 25-year fully amortizing repayment.
- Draw at closing: at least 75% of the line is drawn at closing, and pricing floats through both the draw and repayment periods without converting to fixed.
- Title: the property must be held by you personally or in a revocable living trust.
Primary residences and second homes follow a different table. On a primary residence, the ceiling reaches 90% CLTV, and only at a 720 credit profile, with lines up to $500,000 at that tier. On a second home, the 90% ceiling also requires 720, and the line maxes out at $500,000. Those numbers do not apply to a rental.
Three of these details change the cost math.
The 75% draw at closing. A common strategy elsewhere is to open a line, leave it at zero, and borrow only when a deal appears. This structure does not allow that. Most of the line is borrowed on day one, so you pay interest on money you may not need yet. Count that carrying cost in the break-even.
The floating rate never converts. The fixed-rate conversion option the CFPB describes exists on some plans in the wider market. It does not exist here. If rates rise, your second lien rises with them for the life of the line.
Title. An LLC cannot hold title on these lines, subject to program terms. A rental already deeded to an LLC needs a vesting change before a HELOC is possible, or it needs a different structure altogether. Investors who hold rentals in entities usually find the DSCR cash-out is the cleaner fit.
For a closer look at the dollars, Lendmire has a piece How Much a Rental HELOC Saves Over Replacing a Low First Mortgage.
Where Does a DSCR Cash-Out Fit?
A DSCR cash-out is the other path for a rental, and it qualifies the property instead of you. It qualifies primarily on property-level rental income covering the payment, subject to lender guidelines. Your personal debt load is not the central test, which matters if you own several rentals.
The network typically caps a cash-out refinance at about 75% LTV on a standard rental, with roughly six months of seasoning as the common expectation. Short-term-rental collateral is tighter, with a cash-out ceiling near 70%. Coverage of 1.00 is where many select programs start, and stronger ratios open better pricing and leverage. A separate select-lender path takes coverage below 1.00, with leverage and terms adjusted.
A DSCR cash-out costs you the old first mortgage, so it is the route where the cheap-loan asset gets spent. It makes sense when the first mortgage is near market, when the cash need is large, or when the property sits in an LLC. The complete DSCR loans guide walks through how those programs work.
One caution applies to every refinance. Cash-out raises the payment on the old balance, which compresses the coverage ratio. And clearing 1.00 is not the same as positive cash flow. The ratio compares rent to the housing payment only, and repairs, vacancy, management, utilities, and capital expenses all sit outside it.
Across files like these, a pattern shows up. The investors who regret the choice usually priced the rate and skipped the horizon. They kept a floating line far longer than planned, or they refinanced a cheap loan and sold within a few years. Write down how long you expect the money to be outstanding before comparing anything else.
Decision Checklist
Run through these five questions in order.
1. How big is the cash need compared with the first balance? A small fraction favors the HELOC. A large fraction favors the refinance.
2. How far below market is the first mortgage? A wide gap protects the HELOC route. A narrow gap weakens it.
3. How long will the money be out? Short and uncertain favors the line. Long and certain favors one fixed loan.
4. Can you carry a floating rate and a later payment jump? If a rate rise would strain the property’s cash flow, the HELOC is riskier than it looks.
5. Who holds title? Personal or revocable trust title opens the HELOC. LLC title points toward a DSCR cash-out.
Tax treatment can depend on how the funds are used and how the property is held. Investors should keep clear records and speak with a qualified tax professional before relying on any deduction.
Key Terms Defined
HELOC: a home equity line of credit, which lets you borrow against your equity as needed, up to a set limit.
Cash-out refinance: a new, larger loan that pays off your existing mortgage and hands you the difference in cash.
Second lien: a loan that sits behind your first mortgage and gets repaid second if the property is sold or foreclosed.
Blended rate: the weighted average cost of two loans, found by multiplying each balance by its rate and dividing by total debt.
CLTV: combined loan-to-value, or all loans on the property compared with its value.
Draw period: the stretch when you can borrow from the line, often paying only interest.
DSCR: debt service coverage ratio, which compares a rental’s income to its full housing payment.
Frequently Asked Questions
Is a HELOC always cheaper than a cash-out refinance when I have a low first mortgage?
No. A HELOC wins when the cash need is small compared with the first balance and the first mortgage sits well below market. It loses when the cash need is large, the first loan is near market, or the floating balance runs for many years. The ratio of cash need to first balance is the number to check first.
Can I open a HELOC on a rental and leave it undrawn?
Not on this network’s lines. At least 75% of the line is drawn at closing, so you start paying on most of the money immediately. If your timing is uncertain, a smaller line or a different structure may fit better. Programs vary by lender, so confirm the draw rules before you commit.
Can my LLC take out a HELOC on a rental?
Not under these programs. Title must be held by you personally or in a revocable living trust, so LLC-held rentals do not qualify. A DSCR cash-out is the usual alternative for a property in an entity, subject to lender program eligibility.
What credit score and leverage does a rental HELOC need?
On an investment property, the network typically wants a 700 minimum score and caps combined leverage at 70% CLTV, with lines up to $500,000. HELOC availability through Lendmire is limited to 16 states, narrower than the 41-market DSCR footprint. Every figure is subject to lender guidelines and full file review, and none is a commitment to lend.
When does a refinance beat a HELOC even with a cheap first mortgage?
When the cash need is a large share of the first balance, when the use is known and immediate, or when you hold the money for years. Then the floating higher rate on a big second lien can outweigh what keeping the old loan saves. Add closing costs to both sides before you decide.
Next Step
If you are considering a home equity line and want to see how the numbers work, Lendmire can help you compare HELOC options based on the property, the equity available, credit profile, combined leverage, and your goals.
About Lendmire
Lendmire is a mortgage brokerage (NMLS# 2371349) arranging home equity lines of credit — primary-residence, second-home and investment-property lines — through a wholesale lending network in its 16 full-service states. 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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Informational only. Not a Loan Estimate, approval, or commitment to lend. Program availability and eligibility are subject to lender guidelines, credit approval, property review, and underwriting.
References
1. CFPB – What is a home equity line of credit (HELOC)?
This article is part of Lendmire’s home equity line of credit program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: How to Compare DSCR Cash-Out Terms Before Giving Up a Low Mortgage · HELOC Rules for a Homeowner Who Won’t Give Up a Low First Mortgage · How Keeping a Low First Mortgage Changes the HELOC vs Cash-Out Cost Math
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Disclosure information. Lendmire is a state-licensed mortgage brokerage under NMLS# 2371349. Lendmire is not a depository institution, direct lender, or financial advisor — all loans referenced are placed through wholesale lender partners and are subject to each lender's underwriting standards. This article is provided for general informational purposes and is not a commitment to lend, nor does it constitute financial, legal, or tax advice. Loan programs, terms, rates, and qualification standards change without notice and depend on borrower profile, property type, and the state in which the subject property is located. Equal Housing Opportunity provider. NMLS Consumer Access: nmlsconsumeraccess.org.