The Quick Read: A home equity line of credit behind your existing mortgage leaves the first loan alone. It sits second in line, borrows against your equity, and has to pass a combined-leverage test that counts every loan on the property.
- The first mortgage keeps its balance, term, and payment. The line is added on top.
- Lenders test combined loan-to-value (CLTV), which adds every lien on the property and divides by its value.
- On an investment property, the network ceiling is 70% CLTV, with a 700 minimum credit profile and a $500,000 maximum line.
- Title matters. Lines require an individual or a revocable living trust, not an LLC.
- The biggest hidden cost shows up later. Refinancing the first mortgage may need the line holder’s cooperation.
This checklist walks through the process in order: what the product is, how underwriting treats it, which structures exist, where the usual rules break, and how to decide.
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.
What Does “Second Lien” Actually Mean?
A second lien is a loan recorded behind your first mortgage. If the property is sold or foreclosed, the first lender is paid first and the second lender gets what is left. That is why lenders in second position tend to limit how much total leverage they will allow.
A HELOC is a revolving line. You borrow up to a limit, repay, and borrow again during the draw period. The federal consumer-finance regulator explains that a line has a draw period followed by a repayment period, and that falling behind can put your home at risk. That guidance is written for owner-occupants, so treat it as the baseline, not the full investor picture.
One structural point: a HELOC is not always a second lien. Through Lendmire’s wholesale partners, a standalone line can sit in first or second position. This article covers the second-position case, where you already have a mortgage you want to keep.
Key Terms Defined
First lien: The loan recorded first on the property. It is repaid first in a sale or foreclosure.
Second lien: A loan recorded behind the first. It does not change the first loan.
CLTV (combined loan-to-value): All loans secured by the property, counting the full line limit, divided by the property’s value.
DTI (debt-to-income): Your monthly debts divided by your monthly income. Lines are qualified on personal credit and DTI.
Subordination agreement: A recorded document where the junior lender agrees to stay behind a new first loan.
Vesting: How title is held, such as an individual, a trust, or an LLC.
Step 1: Check Whether the Property Qualifies
Start with property type and occupancy, because the rules differ sharply. Lendmire brokers HELOCs through select wholesale partners, and the ceilings depend on how you use the home.
On an investment property, the network ceiling is 70% CLTV. That applies at 700 and 720-plus credit profiles, up to a $500,000 line, with a 700 minimum score. There is no higher investment tier.
Primary residences and second homes have more room. A second home reaches 90% CLTV only at a 720-or-better credit profile, up to $500,000. A primary residence also reaches 90% CLTV only at 720 or better, up to $500,000. Lower scores step the ceiling down. Lines run from $25,000 to $750,000, though a line above $500,000 is primary-residence only. Separately, a borrower may hold no more than three lines, and combined exposure across them caps at $2,000,000 on the higher-leverage program and $750,000 on the longer-runway program. That exposure cap applies to all of a borrower’s lines together, so it is a different limit from the size of any single line.
Eligible property types include single-family homes, 2-4 units, PUDs, townhomes, and condos, including non-warrantable ones. Manufactured homes, co-ops, condotels, log homes, and commercial, mixed-use, or agricultural zoning are not eligible.
Rental use needs care as well. The federal consumer-finance regulator’s HELOC booklet warns that renting the home out may be prohibited under a line’s terms. Read the line agreement before you rely on rental income.
Step 2: Do the CLTV Math
Max line = value × CLTV cap − all existing liens. That is the whole formula. An older second mortgage or an open line eats room dollar for dollar.
Run an illustrative case in percentages. Say an investment property has a first mortgage at 50% of its value. The investment ceiling is 70% CLTV. That leaves 20% of value for the line, before any other lien is counted. If the first mortgage sits at 60%, the room shrinks to 10%.
Two details catch people. Lenders typically count the full line limit, not just the drawn balance. On this network, at least 75% of the line is drawn at closing, so a large line starts as real debt rather than as untouched capacity.
Valuation is the other detail. Lines at or below $500,000 ordinarily use an automated valuation, with no traditional appraisal, though higher CLTV can trigger a secondary valuation. You can also ask for a full appraisal. A full appraisal is required on every line above $500,000. If you recently rehabbed, an automated model may undercount the work, so a full appraisal can be worth requesting.
Step 3: Understand How the File Is Qualified
A HELOC is not a DSCR loan. It qualifies the borrower, not the rent. A DSCR loan is reviewed primarily on property-level rental income covering the payment, subject to lender guidelines. A line looks at your credit and your debt load.
The network standards are:
- A 600 program floor on primary residences, 640 on second homes, and 700 on investment lines.
- A single-bureau score keyed to the primary wage earner, on a report no older than 90 days at closing.
- A 50% maximum DTI. It drops to 45% for credit profiles from 600 to 679.
- Qualification on the interest-only payment calculated on the maximum draw, with your first mortgage payment inside the debt picture.
That last point matters for investors, because the payment is sized to the full line rather than to the amount you expect to use.
Program figures here are typical guidance from select wholesale partners. Every file is reviewed individually, and nothing here is a commitment to lend.
Step 4: Read Your First Mortgage Before You Apply
This is the step most checklists skip. A new second lien has to be allowed by your first mortgage’s documents. Read the note and the security instrument for language about additional liens or transfers.
Federal law gives owners some protection. Under 12 U.S.C. §1701j-3, a lender generally cannot call a loan due solely because a subordinate lien was created. That protection applies to residential property of fewer than five units. On five or more units, the contract terms rule.
If your first loan is itself a DSCR or other non-QM loan, check its documents with extra care. A DSCR first lender wants first position, and its note may restrict additional liens. Some second-lien programs also decline non-QM firsts.
Also look for a prepayment penalty on the first loan, in case you later pay it off.
Step 5: Check Title, Vesting, and Exposure Limits
Vesting is the sharpest difference between a line and a DSCR loan. Title must be held by the individual borrower or an inter vivos revocable living trust. LLCs, corporations, partnerships, and irrevocable, blind, or land trusts cannot hold title.
If your rental sits in an LLC, you have two paths. You can change the vesting, or you can use a DSCR cash-out refinance instead. Retitling can raise liability and due-on-sale questions, so talk to an attorney and an insurance agent first.
Other limits apply:
- A borrower is limited to three lines in total.
- Combined exposure caps at $2,000,000 on one wholesale program and $750,000 on the other.
- A borrower owning more than 15 financed properties is not eligible.
- An existing second lien turns a new line into a third lien, and some programs will not write thirds.
The Structures That Exist
Primary residences and second homes can run either of two draw structures. The shorter one pairs a 3-year interest-only draw with a 17-year amortizing repayment. The longer-runway structure pairs a 5-year draw with a 25-year repayment. Tennessee shortens both. Investment lines use the 5-year draw and 25-year repayment structure only.
Pricing floats through both the draw and the repayment period on either program and does not convert to fixed. That is a real difference from a fixed first mortgage.
Size matters too. A line above $500,000 is available only on a primary residence. That line needs a credit profile of 700 or better (720 on the longer-runway structure), caps at 75% CLTV, and requires a full appraisal.
After closing, the minimum subsequent draw is $1,000 under the longer-runway program, with Texas at $4,000.
A closed-end second is the alternative. It is a lump sum with no future draws, still sits in second position, and does not touch the first. Some lenders that decline a HELOC on a rental will offer a similar product under another name, so ask about the structure, not just the label.
Where the General Rule Breaks
LLC-owned rentals. Covered above. Most lines will not lend to an entity.
Five-plus units. The due-on-sale protection stops at five units, so contract terms control.
Credit history. A bankruptcy needs 4 years of seasoning from discharge or dismissal. Foreclosure history splits by program. One program seasons a foreclosure in 7 years and a deed-in-lieu, pre-foreclosure, or short sale in 4. The other declines that history entirely. Investment files follow the 7-and-4-year path.
Property for sale. A property listed for sale, or listed in the past 60 days, is ineligible in NC, PA, TN, TX, and WA.
Texas. The primary-residence rules are tighter, but Texas second homes and investment properties are eligible as non-homestead transactions.
Availability. Lendmire arranges these lines in its 16 full-service states only (AL, CA, CO, FL, GA, IN, MI, MT, NM, NC, OH, PA, TN, TX, VA, WA). That is narrower than its 41-market DSCR footprint.
The Later Refinance Problem
A second lien does not hurt your first mortgage today. It can complicate the day you want to refinance it.
You may need approval from your HELOC lender to refinance your first mortgage. That lender can refuse, and then you may need to pay off the line. A subordination agreement is the document that keeps the line behind the new first loan. The junior lender decides whether to sign it.
Subordination is not automatic. An older agreement was written for your old first loan and usually does not carry over. Plan the exit before you open the line.
Two common exits:
- Pay the line off from a cash-out refinance of the first loan. That removes the subordination question.
- Keep the first mortgage until you are ready to retire the line.
Paying off a non-purchase-money second inside a refinance usually makes that refinance a cash-out, even if no money reaches you. That can change leverage limits on the new loan.
HELOC Second Lien or Cash-Out Refinance?
| Factor | Second-Lien HELOC | Cash-Out Refinance |
|---|---|---|
| First mortgage | Left untouched | Replaced and repriced |
| Reviewed on | Personal credit and DTI | Often property rent (DSCR) |
| Title | Individual or revocable trust | LLC possible, per program terms |
| Investment leverage | 70% CLTV ceiling | Around 75% on most standard files |
| Payment structure | Floating, interest-only draw | Fixed or other term structures |
| Exit risk | Needs subordination later | Single loan to pay off |
A line makes sense when your existing first mortgage is worth keeping and your property is in your own name or a revocable trust. A cash-out refinance fits when the property is in an LLC, the first loan is not worth keeping, or you want one fixed structure.
Remember what DSCR does and does not measure. A DSCR loan compares rent to the full monthly obligation. Clearing 1.00 does not mean positive cash flow, because repairs, vacancy, management, and utilities sit outside the ratio. If you add a line payment to a property that also carries a DSCR loan, run coverage on both loans together. The added payment lowers the ratio.
For how coverage works in detail, the complete DSCR loans guide covers it from the ground up.
Documents to Gather
Expect to provide:
- Statements for your first mortgage.
- A credit report, no more than 90 days old at closing.
- Title work and proof of vesting.
- Hazard insurance covering both liens.
- Income documentation for DTI.
Missing statements and vesting problems are common sources of delay, so gather them before you apply.
The Investor Decision
Ask four questions in order.
1. Is the property in my name or a revocable trust, and does it fit an eligible type?
2. Does the CLTV math leave a useful line after existing liens, at the 70% investment ceiling?
3. Does my first mortgage allow a second lien, and what happens when I refinance it?
4. Can I carry the full-line payment within a 45-50% DTI limit?
If you plan to use line funds as a down payment on another property, have a clear exit first. You will carry the original mortgage, the line, and the new property’s payment at once. A later cash-out refinance is the usual way out.
Use any online calculator as an illustrative estimate only. Final eligibility depends on lender guidelines, credit, and full file review.
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.
Frequently Asked Questions
Does a HELOC replace my existing mortgage?
No. It sits behind the first and leaves its balance, term, and payment unchanged. A cash-out refinance, by contrast, replaces the whole first loan.
What is the maximum CLTV on an investment property?
Through Lendmire’s network, 70% CLTV, with a 700 minimum credit profile and a $500,000 maximum line. Primary residences and second homes can reach 90% CLTV, but only at a 720-or-better credit profile and up to $500,000. Every figure is subject to lender guidelines and file review.
Can I take a HELOC on a rental owned by my LLC?
Not directly. LLCs, corporations, and partnerships cannot hold title on these lines. You would need to change the vesting, or consider a DSCR cash-out refinance, which may allow entity ownership per program terms.
What happens if I refinance the first mortgage later?
The line holder generally has to agree to stay behind the new first loan through a subordination agreement. The holder can refuse, and then the line may need to be paid off first.
Can I have more than one line?
A borrower is limited to three lines, with combined exposure capped at $2,000,000 on the higher-leverage program and $750,000 on the longer-runway program. A borrower with more than 15 financed properties is not eligible.
About Lendmire
Lendmire — NMLS# 2371349 — is a mortgage broker that arranges home equity lines of credit in its 16 full-service states through wholesale lenders, on primary residences, second homes and investment properties. Every line is subject to the lender’s guidelines and full underwriting. 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
3. Cornell LII – 12 U.S.C. §1701j-3
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: DSCR Cash-Out Refinance When Comparing Against a Conventional Mortgage: The 2026 Guide · What Is a DSCR HELOC With a 1007 Rent Schedule Appraisal? · DSCR Cash-Out Refinance Checklist for Real Estate Investors
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
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- Lendmire LLC · Firm NMLS# 2371349 · Verify firm licensure
Compliance and disclosures. Lendmire (NMLS# 2371349) is a licensed mortgage broker and is not a direct lender, depository institution, financial advisor, or tax professional. Content in this article is general market analysis and educational information — not financial, legal, or tax advice for any specific situation. Lendmire does not guarantee loan approval; every transaction is subject to underwriting by the funding lender. Mortgage pricing and loan program guidelines are subject to change at any time without notice and vary by borrower characteristics, property type, and state regulations. Lendmire complies with Equal Housing Opportunity. Licensure verification: NMLS Consumer Access.