The Quick Read: Keeping a cheap first mortgage and adding a line usually beats one new loan when the new money is a small slice of your equity, the old loan costs far less than what lenders would write now, and you can live with a floating payment on the second lien. Flip any one of those and the answer can reverse.
- A home equity line of credit (HELOC) sits behind your first mortgage. A cash-out refinance replaces the first mortgage and reprices the entire balance.
- On an investment property, the home equity lines in Lendmire’s wholesale network top out at 70% combined loan-to-value (CLTV) and a $500,000 line, with a 700 credit minimum.
- A HELOC is judged on you: credit, debt-to-income, and equity. A DSCR cash-out is judged mainly on whether the rent covers the new payment.
- Rental HELOCs generally cannot be held in an LLC. If the property sits in an entity, that usually settles the question.
- The line’s payment floats and it is tested at the maximum draw. Stress-test it before you commit.
What Each Path Actually Does
Keeping the first adds a second lien. Replacing it swaps your old first lien for a bigger new one. The difference is simple: with a line, only the new money is priced at today’s market. With one new loan, everything is.
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.
Say you own a rental with a cheap first mortgage and need cash for a second property’s down payment. A HELOC leaves the cheap loan alone and prices only the cash you pull. A cash-out refinance pays off the cheap loan and reprices the whole balance, plus the cash.
| Factor | Keep first + HELOC | One new loan (cash-out) |
|---|---|---|
| Existing first mortgage | Stays as is | Paid off |
| What gets repriced | Only the drawn amount | The entire balance |
| Number of payments | Two | One |
| Payment behavior | Second lien floats | Fixed or adjustable by choice |
| Qualifies mainly on | Borrower profile | Rent covering the payment |
| Title | Personal or revocable trust | Entity can often stay, subject to lender program eligibility |
The lines described here are standalone products. They can sit in first or second position, but the usual case for an investor is a second lien behind the loan you want to keep.
Key Terms Defined
HELOC: A revolving line secured by your property. You borrow during a draw period, then repay.
Lien: A lender’s legal claim on the property. The first lien gets paid first if the property is sold or foreclosed.
CLTV (combined loan-to-value): Every loan on the property added together, divided by the property’s value.
DTI (debt-to-income): Your monthly debts divided by your monthly income.
DSCR (debt service coverage ratio): Monthly rent divided by the full monthly payment on the loan: principal, interest, taxes, insurance, and any HOA dues.
Seasoning: The waiting period a lender wants after you buy or refinance before it will lend against the property again.
Subordination: The second-lien lender’s written consent to stay in second position if you refinance the first mortgage later.
How Underwriting Treats Each Path, Step by Step
The two paths are tested differently. That is the point most investors miss. Understanding the tests tells you which path you can actually get.
Step 1: Size the equity room. Equity is measured one property at a time. Take the property’s value, multiply by the CLTV ceiling, and subtract the first mortgage and any other liens. What remains is the most the line can be, then it is held between $25,000 and $500,000. Equity in one rental cannot cover a shortfall in another.
Here is the practical wrinkle. If your first mortgage already equals 60% of value and the investment ceiling is 70%, you have ten points of room. On a modest-value rental, ten points may fall below the $25,000 minimum. Then there is no line to get.
Step 2: Pick the underwriting lens. A HELOC is underwritten on the borrower. The lender looks at credit, existing liens, and DTI. It does not ask whether rent covers the payment. The DTI ceiling on these lines is 50%. Here is the catch: it is tested against the interest-only payment on the maximum draw, not on what you plan to borrow.
Every financed property counts in your DTI. Rent can count as income, usually at a lender-set discount. Rent from a vacant unit may count at zero.
DSCR loans are designed for non-owner-occupied investment properties. Because they are business-purpose investor loans, they are reviewed differently from a standard owner-occupied mortgage. A DSCR cash-out qualifies primarily on property-level rental income covering the payment, subject to lender guidelines. Your personal DTI is not the main test.
Step 3: Check credit and the leverage ceiling. NerdWallet notes that rental-property lines come from a smaller pool of lenders, with tighter terms than a home line. It reports that lines on investment property typically want a credit score of 720 or higher, and that many lenders sit below a 70% ceiling. Those are market-wide figures. On Lendmire’s wholesale network, an investment-property line requires a 700 minimum and tops out at 70% CLTV.
A higher score does not buy more leverage on a rental. A 720 reaches the same 70% investment ceiling as a 700. Primary-residence and second-home lines can reach 90% CLTV, but only at a 720-or-better profile. Do not carry that figure over to a rental.
Step 4: Gather documents. For the HELOC, a self-employed borrower typically documents income with 12 or 24 months of bank statements. That changes how income is documented, and it is reviewed on documented income under the applicable program, subject to lender guidelines. It does not change credit, equity, lien position, or property rules. The credit report can be no more than 90 days old at closing. Lines at or below $500,000 ordinarily run an automated valuation, though a borrower can request a full appraisal. The DSCR path typically uses a lease or rent schedule plus an appraisal.
Step 5: See what the one-loan path asks. Across most of the network, a DSCR cash-out tops out around 75% LTV on standard rentals and 70% on short-term-rental collateral. About six months of seasoning is the common expectation. Most programs want a credit score around 660, though a 620 floor exists in parts of the network. Loan sizes reach up to $3,000,000 on standard programs, with smaller balances available through select lenders, and reserves commonly sit around six months of the full monthly payment. Reserves vary by lender, leverage, and loan size.
Coverage matters here. A 1.00 ratio 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. Our complete DSCR loans guide walks through how the ratio is built.
The Structures and Variations
The HELOC structure. On an investment property, the line has a 5-year interest-only draw followed by a 25-year repayment. At least 75% of the line is drawn at closing. Pricing floats through both periods and never converts to fixed. That changes the usual sales pitch of paying interest only on what you use. Most of the line is in use from day one, so size the line to the need.
The federal consumer regulator, the CFPB, describes the same basic design: a draw period when you can borrow, then repayment. Its plain-language HELOC explainer adds that these lines usually carry a variable rate. Some plans let you convert part or all of the balance to fixed, which is usually higher but more predictable. The lines described here do not offer that conversion.
The one-loan structure. The spine is the 30-year fixed. Select lenders in the network also offer 40-year terms and interest-only periods, and adjustable structures exist for investors who want them. Above $2,500,000, the network generally holds to 30-year fixed.
Combining both. You can use both products on different needs, but exposure limits apply. A borrower is limited to three lines. Combined exposure caps depend on the program. More borrowing also means more payments to cover.
For a deeper look at the one-loan side, see Lendmire’s piece Keeping the First Lien vs Rolling Both Into One Cash-Out Refinance.
Where the General Rule Breaks
The rule of thumb is that a cheap first mortgage should be kept. It breaks in these places.
The property is in an LLC. Title for these lines must be held personally or in a revocable living trust. LLCs, corporations, partnerships, and irrevocable, blind, or land trusts cannot hold title. A DSCR cash-out generally lets the entity stay on title, subject to lender program eligibility. Moving a rental out of its LLC to qualify for a line can create its own problems, so many investors simply take the DSCR route.
The need is large. The line caps at $500,000 total, and an investment property stops at 70% CLTV. Need more than either allows, and the one-loan path is the only way to raise the cash.
The old loan is not that cheap. If your first mortgage costs close to what lenders would write now, keeping it saves almost nothing. You are left with the floating second lien as the main downside.
The property type is wrong. Two-to-four-unit properties are eligible for the line. Five or more units are commercial, and mixed-use is not offered. Manufactured homes, log homes, co-ops, and condotels are not eligible for these lines. Manufactured homes, log homes, and barndominiums are not offered in the network’s DSCR programs either.
It is a short-term rental. Many HELOC lenders do not fit nightly rentals into their categories. Depreciation-driven tax losses can also hurt a personal-income review. The DSCR cash-out on short-term-rental collateral generally runs to 70% LTV, expects a 640-plus score, and looks for about 12 months of hosting history. Short-term rental rules can vary by city, county, HOA, and property type, so investors should confirm local rules before relying on projected rental income.
Cash-out lowers coverage on the old property. The balance rises, so the coverage ratio falls. Clearing 1.00 on the new payment also does not mean the property cash flows. DSCR compares rent to the full monthly payment only. Repairs, vacancy, management, utilities, and capital expenses sit outside the calculation.
Portfolio limits. An investor with more than 15 financed properties is not eligible for these lines. A property listed for sale, or listed in the past 60 days, is ineligible in several states.
What Keeping the First Does Not Protect
Keeping your first mortgage is not the same as leaving your finances unchanged. Four things still move.
1. Debt-to-income. The first mortgage stays in your DTI, and the line is tested at its maximum draw. A line you will barely use can still weigh on DTI.
2. Combined leverage. Every lien counts toward the CLTV ceiling. The line shrinks as the first loan grows relative to value.
3. A second payment. You manage two payments instead of one. After the draw period ends, the line’s payment shifts.
4. A later refinance. If you want to refinance the first loan later, the second-lien lender typically must agree to stay in second position. Without that consent, the refinance can stall. Plan for this before you add the line.
Stress-Testing the Line
Run two tests before you sign. Neither needs a number from the lender.
Test one: the floating piece. Pricing on the line floats. Your payment can rise even if your balance does not change. Ask whether the rental still works if that piece costs noticeably more.
Test two: the end of the draw. Opendoor’s explainer calls payment shock the main HELOC risk. It puts the typical step-up when repayment begins at about 20% to 25% on a standard consumer line with a long draw, assuming pricing stays flat. The network’s investment line is shorter: a 5-year draw and a 25-year repayment. That means the reset comes sooner. Check the rental’s coverage at the repayment payment, not only the interest-only one.
How to Decide: The Five-Factor Test
Work through these five questions. They bind in roughly this order.
| Question | Leans keep + HELOC | Leans one loan |
|---|---|---|
| How is the property titled? | Personal or revocable trust | LLC or other entity |
| Are you strong on credit and DTI? | 700+ credit, DTI under 50% | Thin credit or heavy DTI |
| How big is the need? | Fits inside 70% CLTV and $500,000 | Exceeds either |
| How cheap is the old first? | Far below current pricing | Near current pricing |
| Can you tolerate a floating second lien? | Yes, with a stress test | No, you want one fixed payment |
If you answer “keep + HELOC” on all five, keeping the first is likely the better structure. If you answer “one loan” on the title question, you are probably done. Entity title usually decides it.
Three Worked Scenarios
These are illustrations, not quotes. Every file is underwritten individually.
A small draw. Picture a landlord whose first mortgage sits near 50% of value and who needs a modest slice of equity for a roof and a unit turnover. Combined leverage stays well under 70%. The old loan keeps its low cost on almost the whole balance. A line fits, provided the need clears the $25,000 minimum. Remember that at least 75% of the line is drawn at closing, so do not oversize it.
A mid-size draw. Consider an investor whose first mortgage is near 55% of value and who wants cash that pushes combined leverage close to the 70% ceiling. This is a toss-up. If the old loan is far cheaper than a new one, the line still tends to win on blended cost. If it is only modestly cheaper, the stress test and the second payment may tip it to one loan. Run both, then compare monthly cash flow now and after the draw ends.
A large draw. Say you own a rental whose equity could fund a down payment and a rehab, and the need would push past 70% CLTV or past $500,000. The line cannot do it. A DSCR cash-out, around 75% LTV on a standard rental, may. Check that the larger balance still clears the coverage the lender wants. Final terms depend on the lender’s guidelines, the property type, and the borrower’s complete credit picture.
To compare the two paths yourself, use the blended-cost method. For the line path, blend the old first mortgage’s cost on the old balance with the line’s floating cost on the drawn amount. For the one-loan path, apply the new loan’s cost to the whole balance and add the full closing costs. Then divide the extra closing costs by the monthly savings to see how long you must hold the property to break even. Hold for a shorter time than that, and the cheaper closing costs of the line win.
For a first-time landlord with one rental, Lendmire’s article Is a Rental HELOC Right for a First-Time Landlord With One Rental? covers the same decision at smaller scale.
When the Answer Is No
| Decline reason | Practical next step |
|---|---|
| Property titled in an LLC | DSCR cash-out, subject to program eligibility |
| Credit under 700 on a rental | Build credit, or use a DSCR path, where a 620 floor exists in parts of the network |
| Too little equity after the first lien | Wait, or pay down the first |
| Need exceeds $500,000 or 70% CLTV | One larger loan, such as a DSCR cash-out |
| DTI too high | DSCR path, which leans on rent coverage |
| Property type not eligible | Check the DSCR property list first |
Pre-Decision Checklist
Before you choose, pull your first mortgage note and read any language about additional liens. Gather your credit report, 12 or 24 months of bank statements if you are self-employed, a current lease or rent schedule, and the title and vesting on the property. Then ask each lender what the payment will be at the maximum draw and what happens at the end of the draw period. Ask whether the second-lien lender will agree to subordinate if you refinance later. Compare the full terms in writing.
Home equity lines described here are available only in Lendmire’s 16 full-service states, narrower than its 41-market DSCR footprint, which includes Washington, D.C.
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.
Frequently Asked Questions
Does keeping the first mortgage mean its terms stay the same?
Yes. A HELOC sits behind the first mortgage and does not touch its balance, term, or pricing. A cash-out refinance replaces it.
Can I roll a HELOC into a refinance later?
Often, yes. A later refinance can pay off the line, or you can refinance the first loan with the line staying in place. In the second case the line’s lender typically must consent to remain in second position.
Does the HELOC look at my rental income?
Mostly no. It is underwritten on you: credit, DTI, equity. Rent may count as income at a lender-set discount, and rent from a vacant unit may count at zero.
Can my LLC take the line?
Generally no. Title must be held personally or in a revocable living trust. A DSCR cash-out generally allows the entity to stay on title, subject to lender program eligibility.
Is clearing 1.00 on a DSCR loan the same as positive cash flow?
No. Repairs, vacancy, management, utilities, and capital expenses sit outside it.
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. An illustrative calculator can estimate line room, but it is an estimate, not a quote.
About Lendmire
As a mortgage broker (NMLS# 2371349), Lendmire helps homeowners and real estate investors in its 16 full-service states open home equity lines of credit arranged through wholesale lenders. Lendmire is never the lender; line amounts, ceilings and terms are set by the lender under its guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
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References
1. NerdWallet: HELOC on investment property
3. 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: HELOC Behind a Sub-4% First Mortgage Worth Keeping · How to Strengthen a HELOC Application as a Self-Employed Borrower · How a Cash-Out Refi Beats a HELOC When Your First Is Already High
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Disclosures. The information presented in this article is general market commentary, not financial, legal, or tax advice. Lendmire is a mortgage brokerage (NMLS# 2371349) — not a direct lender or depository institution — and loan placement is subject to lender underwriting. Nothing in this content represents a commitment to lend. Loan terms, pricing, and program availability vary based on borrower qualifications, property characteristics, and state of subject property, and are subject to change at any time. Lendmire complies with Equal Housing Opportunity requirements. Consumer access: nmlsconsumeraccess.org.