The Quick Read: A home equity line of credit (HELOC) is a separate loan secured by its own lien. Your first mortgage keeps its balance, term, and payment. The line sits beside it, and you borrow against your equity as you need it, subject to lender guidelines.
- A HELOC adds a second loan and a second payment. It does not replace or pay off your first mortgage.
- The size of the line depends on home value, your first-mortgage balance, and the lender’s combined loan-to-value (CLTV) ceiling.
- On an investment property, the ceiling across our wholesale network is 70% CLTV. Primary residences and second homes can reach higher, but only with strong credit.
- The line can complicate a later refinance, because the line’s lender may have to approve it.
- A HELOC is underwritten on you (credit, debt-to-income, title). A DSCR loan is underwritten mainly on the property’s rent.
How Does a HELOC Sit Next to Your First Mortgage?
A HELOC and a first mortgage are two separate loans on one property. Each has its own lender, its own statement, and its own payment. The first lender gets paid first if something goes wrong, and the line’s lender gets paid second.
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.
That ordering is why people call a HELOC a second mortgage. Nothing about your original loan changes when the line opens. Your balance, your term, and your monthly obligation stay exactly where they were.
A line can also hold first position when there is no mortgage on the property. Lendmire is a mortgage broker, and through select wholesale lenders it arranges standalone lines in either first or second position.
Watch for one product trap. Some bank “all-in-one” accounts actually replace the first mortgage with a new combined loan. That is a refinance in disguise, so ask which product is really on offer.
How Does the Lender Decide How Much You Can Borrow?
The line size comes from simple arithmetic. The lender multiplies the home’s value by its CLTV ceiling, then subtracts what you already owe. CLTV means all loans on the property added together and divided by its value.
Use percentages to see it. Say a rental’s value is 100%, and the first mortgage balance is 55% of that value. At a 70% CLTV ceiling, the room for a line is 15% of value. Pay the first mortgage down to 45%, and the room grows to 25%.
Only a lower first balance adds room. The terms on your first loan add none, however favorable they are.
The ceiling depends heavily on how you use the property. Here is how it breaks out across the network:
| Occupancy | Top CLTV ceiling | Credit profile | Maximum line |
|---|---|---|---|
| Primary residence | 90% (lines to $500,000) | 720+ for the top tier | $500,000 at 90% CLTV; $750,000 at 75% CLTV, 700+ (720 on the longer-runway program) |
| Second home | 90% | 720+ for the top tier | $500,000 |
| Investment property | 70% | 700 minimum | $500,000 |
Lower credit tiers step the ceiling down. On a primary residence, a 700 profile reaches 85% CLTV on lines up to $500,000, and a 640 profile reaches 80%. A second home with a 640 profile reaches 75%. An investment property has no tier above 70%, and it does not open below a 700 score.
Lines above $500,000 are for primary residences only. They need a credit profile of 700 or better (720 on the longer-runway structure, which has a 5-year draw and 25-year repayment). They cap at 75% CLTV and require a full appraisal. The other structure has a 3-year draw and 17-year repayment. Both are explained below.
The CFPB’s HELOC booklet illustrates the same arithmetic with a 75 percent figure. That is a teaching example from a consumer guide. It is not a rule, and it is above the 70% investment ceiling on this network.
What Do Underwriters Actually Check?
Underwriting a HELOC looks at you and your title first. The property comes second. That is the opposite emphasis from a DSCR loan, where qualification runs primarily on property-level rental income covering the payment, subject to lender guidelines.
Here is what the file covers, in the order most reviewers read it:
- Credit. The program floor is 600 on primary residences. Second homes start at 640, and investment properties start at 700. The score comes from a single bureau, keyed to the primary wage earner. The report can be no more than 90 days old at closing.
- Debt-to-income (DTI). The maximum is 50%. Profiles from 600 to 679 are held to 45%, and anything above 45% needs a 680 minimum. The lender reviews your file on the interest-only payment calculated as if you had drawn the maximum line.
- Housing and tradeline history. Standards vary by structure. The longer-runway structure asks for two tradelines seasoned 12 months or one seasoned 24. It also reviews mortgage lates across all your financed properties.
- Past credit events. A bankruptcy needs 4 years of seasoning from discharge or dismissal. Foreclosure history splits by structure on primary residences and second homes. One seasons a foreclosure at 7 years and a deed-in-lieu, pre-foreclosure, or short sale at 4. The other declines that history entirely. Investment files follow the 7-and-4-year path.
- Valuation. Lines at or below $500,000 ordinarily use an automated valuation with no traditional appraisal, though a higher CLTV can trigger a secondary valuation. Every line above $500,000 gets a full appraisal. You can also ask for one on any line.
- Exposure. A borrower is limited to three lines. A borrower with more than 15 financed properties is not eligible.
Every figure here is subject to lender guidelines and a full file review. Where the two structures differ, each number applies only inside its own terms.
What Happens From Application to Payoff?
A HELOC runs in two phases: a draw period where you borrow and pay interest only, then a repayment period where principal comes due. NerdWallet’s HELOC explainer describes the same pattern across the broader market. The network version has some twists.
1. Apply and qualify. The lender pulls credit, checks DTI, confirms title, and runs the valuation.
2. Close with a draw. Unlike a credit card, most of the line is not optional. At least 75% of the line is drawn at closing. That surprises people expecting a standby reserve.
3. Pay interest only. Two structures exist on primary residences and second homes. One has a 3-year interest-only draw and a 17-year fully amortizing repayment. The other has a 5-year draw and a 25-year repayment. Investment lines run the 5-year/25-year structure only. A few states shorten both.
4. Draw again. After closing, the minimum subsequent draw is generally $1,000, with a higher minimum in at least one state. The CFPB’s HELOC overview uses a $300 minimum as its example. That is a market illustration, not this network’s number.
5. Enter repayment. NerdWallet warns that the bill can jump sharply after the interest-only years. Budget for that step before you open the line.
6. Pay off. You can pay the balance down early. Repayment is also generally due if you sell the property.
Pricing on these lines floats through both the draw and repayment periods. It never converts to a fixed structure, so your payment moves with the balance and the market. The CFPB makes the same point about HELOCs generally: payments vary with the outstanding balance.
Where Does the General Rule Break?
The rule says a HELOC leaves your first mortgage alone. It mostly does, but several edge cases bite investors in particular.
A later refinance gets harder
This is the biggest one. Per the CFPB, once you open a HELOC, you may need that lender’s approval to refinance your first mortgage, and the lender can refuse. A new first-mortgage lender generally will not close in second position. Plan the exit before you open the line.
The line can freeze
If the home’s value drops significantly, the CFPB says a lender may stop additional credit under the plan. Treat the available balance as conditional, not as cash in the bank.
The property can’t sit in an LLC
Title is the sharpest structural difference from a DSCR loan. A HELOC needs the property held by you individually or by a revocable living trust. LLCs, corporations, partnerships, and irrevocable, blind, or land trusts cannot hold title. If your rental already sits in an LLC, you need a vesting change first, or you should look at a DSCR cash-out refinance instead.
Some property types are out
Manufactured homes, co-ops, condotels, log homes, commercial, mixed-use, and agricultural zoning are not eligible. Single-family, 2-4 units, PUDs, townhomes, and condos (including non-warrantable) are. Modular factory-built homes work only on the longer-runway structure. A property listed for sale, or listed within the past 60 days, is ineligible in several states.
Balloon structures exist elsewhere
Experian notes that some HELOCs in the broader market carry a balloon payment, meaning the entire balance is due when the draw ends. Read the repayment terms on any line before you sign.
Rental collateral is thinner than owner-occupied
Many large retail lenders decline rental collateral outright. Those that accept it are stricter than on a primary home. That is why investors often find lines through a broker who sees several lenders’ guidelines at once.
Using a HELOC as the down payment
This one deserves some thinking out loud. Borrowing against your primary home to fund a rental down payment can work on paper. But if the line covers the down payment, you hold little real equity in the new property. Combined leverage then sits on two properties at once. Investors who run this play need rent that comfortably covers the new loan and a plan to pay the line down.
How Does a HELOC Compare With a DSCR Cash-Out Refinance?
A HELOC leaves your first loan in place and adds a line. A DSCR cash-out refinance replaces the first loan with a new one that is reviewed on the property’s rent. The DSCR is the rent divided by the full monthly obligation (principal, interest, taxes, insurance, and any HOA dues).
| Factor | HELOC | DSCR cash-out refinance |
|---|---|---|
| First mortgage | Stays in place | Replaced by new loan |
| Underwritten mainly on | Your credit and DTI | Property rent vs. payment |
| Title | Individual or revocable trust | LLC allowed, per program terms |
| Leverage ceiling | 70% CLTV on investment | Around 75% LTV, standard rentals |
| Typical size | $25,000 to $750,000 | Up to $3,000,000 on standard programs |
| Payment | Interest-only, then amortizing | Per loan structure chosen |
On a DSCR cash-out, the common seasoning expectation is about 6 months of ownership. 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.
Clearing 1.00 does not mean the property cash flows. The ratio compares rent to the housing payment only. Repairs, vacancy, management, utilities, and capital expenses sit outside it.
The main investor risk in a HELOC is leverage stacking. Suppose a rental covers its first mortgage at about 1.25x. Draw a line against it, and the combined obligation can push coverage below 1.00x. Lenders on a later DSCR refinance will see that new debt. Lendmire’s complete DSCR loans guide walks through how the ratio is built and what moves it.
For the related case of pulling cash from an existing rental, see Lendmire’s piece Can a Rental HELOC Pull Cash Without Refinancing the First Mortgage?.
What Does the Decision Look Like in Practice?
Keep the HELOC when your first mortgage has terms you would not replace and you can carry a second payment. Move to a cash-out refinance when the first loan is not worth keeping, or when the property sits in an LLC. A bigger down payment or more equity helps both paths, but it never erases leverage caps, credit floors, or property eligibility.
Consider three investor profiles:
- The patient keeper. This investor owns a rental at modest leverage, with strong credit and a first mortgage worth keeping. A line at or under the 70% investment CLTV ceiling fits, as long as coverage still holds with the line fully drawn.
- The portfolio scaler. This investor holds several rentals in LLCs. The title rule rules out a HELOC on most of them, so a DSCR cash-out is the more realistic route.
- The primary-residence tapper. This borrower uses equity in their own home to fund a rental purchase. They qualify on a higher CLTV tier if credit is strong, but they carry the repayment step-up on a home they live in.
Stress-test before you apply. The line is qualified on the interest-only payment at the maximum draw, so use that same logic yourself. Then ask what happens at the start of repayment, and what happens if the line’s pricing climbs. Finally, ask whether you would still want the line if you refinanced the first mortgage next year.
Availability matters too. These lines are offered only in the 16 states where Lendmire provides full-service mortgage lending. That is narrower than the 41-market DSCR footprint.
Key Terms Defined
HELOC: An open-end line of credit secured by your home that you can borrow against, repay, and borrow against again.
CLTV: Combined loan-to-value, meaning all loans on the property added together and divided by its value.
Draw period: The stretch when you can borrow and typically pay interest only.
Repayment period: The stretch when borrowing stops and payments include principal.
Lien position: The order in which lenders get paid from the property if the loans go unpaid.
Subordination: A lender’s agreement to stay behind a new first mortgage rather than blocking it.
DSCR: Debt service coverage ratio, meaning monthly rent divided by the full monthly housing obligation on a property.
Frequently Asked Questions
Can I have a HELOC and a mortgage on the same property at once?
Yes. The HELOC is a separate second-lien loan that sits behind your first mortgage. Your first loan keeps its own balance, term, and payment. On an investment property, the network ceiling for combined borrowing is 70% CLTV, so the first mortgage balance must leave room under that ceiling.
Does a HELOC change my first mortgage?
No. It adds a loan and does not alter the existing one. The first lender never gets replaced. The real effect shows up later, when a refinance may need the line lender’s approval or a payoff of the line.
Can I put a HELOC on a rental owned by an LLC?
Not directly. Title must be held by you individually or by a revocable living trust. An LLC, corporation, or partnership cannot hold title on these lines. If the rental is in an LLC, the options are a vesting change or a DSCR cash-out, subject to program terms.
What happens when the draw period ends?
Borrowing stops, and payments now include principal. On the network’s structures, repayment runs 17 or 25 years, depending on which one you chose. Pricing continues to float. Plan for a payment step-up and test your cash flow against it before you open the line.
Do I need a DSCR to get a HELOC?
No. A HELOC is underwritten on your credit, DTI, and title, not on rent coverage. Rental income still matters indirectly, because it supports your debt-to-income picture and your ability to carry the payment. A DSCR loan reverses that emphasis.
Comparing Your Options
If you are weighing a home equity line against a cash-out refinance 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. Lendmire is a broker that arranges financing through select lenders in its wholesale network. Every figure here is subject to lender guidelines and full file review, and nothing here is a commitment to lend.
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
2. NerdWallet – HELOC explainer
4. Experian – Draw period on a HELOC
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 HELOC Requirements Without Refinancing Your First Mortgage · Investment Property HELOC Options When You Already Have a Second Mortgage · DSCR HELOC Rules After a Quitclaim From a Parent
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Important disclosures. Lendmire (NMLS# 2371349) is a licensed mortgage brokerage. Lendmire is not a direct lender, depository institution, or financial advisor. All loan inquiries are subject to lender underwriting; this article does not constitute a commitment to lend. Rates, terms, and program guidelines are subject to change without notice and vary by borrower profile, property type, and state. Information in this article is general in nature and is not financial, legal, or tax advice. Equal Housing Opportunity. NMLS Consumer Access: nmlsconsumeraccess.org.