The Quick Read: The best program for your situation is a second-lien line matched to your property type, credit profile, and combined leverage. Your first mortgage stays exactly as it is. The line sits behind it, and the first loan’s balance eats into how much room you have.
- On an investment property, lines top out at 70% combined loan-to-value (CLTV) with a 700 minimum credit score, up to $500,000.
- Primary-residence and second-home lines can reach 90% CLTV, but only at a 720-or-better credit profile.
- The line is reviewed on you (credit, debt load, equity), not on rent.
- LLC-titled properties cannot take this line.
- Every figure here is subject to lender guidelines and full file review.
What a HELOC Behind Your Existing Mortgage Really Is
A HELOC (home equity line of credit) is a revolving credit line secured by your property. Behind an existing mortgage, it is a second lien. That means the first lender gets paid first if the property is ever sold or foreclosed. The second-lien lender gets paid next, and you get whatever is left.
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.
Your first loan does not change. Its balance, term, and payment stay put. You just add a second loan behind it.
On a rental, the pool is smaller than on a primary home. NerdWallet notes that not every lender offers an investment-property HELOC, and that borrowers may see lower borrowing amounts than on a primary residence. That matches what Lendmire sees as a mortgage broker: many lenders simply do not write these lines on rentals. The ones that do have their own rules on credit, leverage, title, and property type.
That is why one lender’s page can never tell you the best program. A broker that shops a network of wholesale HELOC lenders can match the file to the program that fits.
What “Best Program” Means
The best program depends on five things. Each one can rule a program in or out.
1. Occupancy. Primary home, second home, or investment property. This sets your leverage ceiling.
2. Credit profile. Higher scores unlock higher CLTV tiers.
3. Combined leverage. Your first mortgage balance plus the new line, divided by property value.
4. Line size. Typically $25,000 to $750,000, with limits by occupancy.
5. Title. The property must sit in your name or a revocable living trust.
Here is how the ceilings differ by occupancy across the network’s HELOC programs:
| Occupancy | Credit floor | Top CLTV | Max line |
|---|---|---|---|
| Primary residence | 600 | 90%, only at 720+ | $500,000 at 90% CLTV; $750,000 at 75% CLTV, 700+ (720 on the longer-runway program) |
| Second home | 640 | 90%, only at 720+ | $500,000 |
| Investment property | 700 | 70% | $500,000 |
Read that table carefully. The 90% figure belongs to primary and second-home lines at a 720-or-better profile, and it is not a general number. On an investment property, 70% CLTV is the ceiling. Some market surveys and lender pages report higher leverage on rentals. Those describe the broader market. They do not describe what the network offers on an investment line.
On a primary residence, the higher tiers also have dollar caps. A 720+ profile reaches 75% CLTV up to $750,000, or 90% CLTV up to $500,000. A 700+ profile reaches 75% CLTV up to $750,000 or 85% CLTV up to $500,000. Lines above $500,000 are primary-residence only. They need a 700-or-better profile (720 on the longer-runway program, defined below), cap at 75% CLTV, and require a full appraisal.
Availability is narrower than DSCR lending. Lendmire’s DSCR investor programs run in 41 markets, including Washington, D.C. The equity-line programs run in 16 states: AL, CA, CO, FL, GA, IN, MI, MT, NM, NC, OH, PA, TN, TX, VA, and WA.
How Underwriting Treats Your First Mortgage, Step by Step
Your first mortgage affects approval in three ways. Its balance counts toward combined leverage. Its payment counts toward your debt-to-income ratio. The terms you locked on that loan do not enter the qualifying test at all.
Here is how a file moves through review.
1. Measure usable equity. Take the property value times the CLTV cap for your occupancy and credit tier. Subtract every lien already on the property. What remains is the most the line can be.
2. Check the credit. The programs use a single-bureau score keyed to the primary wage earner. The report can be no more than 90 days old at closing, and there are no rescores. Minimum scores run from 600 on a primary home to 700 on an investment property.
3. Run debt-to-income (DTI). DTI compares your monthly debt payments to your income. The maximum is 50%. It drops to 45% for credit profiles from 600 to 679, and a ratio above 45% requires at least a 680. The line is qualified on its interest-only payment at the maximum draw, not the amount you plan to borrow.
4. Read the first mortgage documents. The first loan has to allow a second lien. A prepayment penalty on the first loan is a common stall point, so pull your payoff statement and loan terms before you apply.
5. Confirm title and property type. The borrower must hold title individually or through a revocable living trust. Eligible properties include single-family, 2-4 units, PUDs, townhomes, and condominiums, including non-warrantable condos.
6. Value the property. Lines at or below $500,000 ordinarily use automated valuation with no traditional appraisal, though a higher CLTV may require a secondary valuation. Every line above $500,000 needs a full appraisal. You can also request one on any file. Market sources such as NerdWallet say multiple appraisals may be required on investment lines, so expect practices to differ by lender.
The strongest files clear two tests: enough equity and a DTI that holds up with both payments on the books.
Sizing a Line Behind a First Mortgage
Run the numbers in percentages of property value. Picture an investment property where the first mortgage balance equals 55% of value. At the 70% CLTV ceiling, the most the line can add is 15% of value. A borrower with a 700+ score and acceptable DTI is in range, subject to lender guidelines.
Now take the same property with a first mortgage at 68% of value. Only 2% of value remains. That sliver almost certainly falls under the $25,000 minimum line, so the file does not work as a HELOC.
Now flip to a primary residence. With a first mortgage at 60% of value and a 720+ profile, the 90% CLTV ceiling leaves up to 30% of value. The $500,000 line cap at that tier then becomes the binding limit, not the equity.
Equity room and line caps both matter. Whichever is smaller wins.
How the Line Is Structured After Closing
The network’s HELOC lines run in two draw structures on primary homes and second homes:
- 3-year draw, 17-year repayment. You borrow with interest-only payments for three years. Then the balance amortizes over 17 years.
- 5-year draw, 25-year repayment. This is the longer-runway program. Investment lines use this structure only.
Tennessee shortens both structures, to 3 and 12 years or 5 and 10 years. At least 75% of the line is drawn at closing. After closing, the minimum subsequent draw is $1,000 (Texas is $4,000) on the program that states one.
Pricing floats across the draw and the repayment period and never converts to fixed. The CFPB describes a HELOC as an open-end line with a draw period followed by a repayment period, and its consumer booklet notes that variable pricing is typical. Your payment moves with your balance and with pricing. It also keeps running while a rental unit sits empty.
Second-Lien Line vs. Cash-Out Refinance vs. First-Lien Line
The choice usually comes down to one question. Do you want to keep your first mortgage, or replace it?
| Factor | Second-lien line | DSCR cash-out | First-lien line |
|---|---|---|---|
| First mortgage | Stays untouched | Paid off, replaced | Paid off or replaced |
| Reviewed on | Your credit, DTI, equity | Rent covering payment | Your credit, DTI, equity |
| Payments | Two loans | One loan | One line |
| Title | Individual or trust | Entity possible | Individual or trust |
A cash-out refinance on a standard long-term rental tops out around 75% LTV across most of Lendmire’s network. About 6 months of seasoning is the common expectation. It qualifies primarily on property-level rental income covering the payment, subject to lender guidelines, which is how DSCR loans work. DSCR compares rent to the full monthly obligation. Clearing 1.00x is a select-program starting point, not a profit measure, because repairs, vacancy, management, and capex sit outside the calculation. A separate select-lender path allows coverage below 1.00 with leverage and terms adjusted. The complete DSCR loans guide walks through both.
An LLC-titled rental can go the cash-out route, subject to lender program eligibility. A HELOC line cannot.
Where the Rule Breaks
A rental held in an LLC. LLCs, corporations, partnerships, and irrevocable, blind, or land trusts cannot hold title on these lines. This is the sharpest difference from a DSCR loan. A property already deeded to an LLC needs a vesting change or a DSCR cash-out instead.
A first mortgage that is a DSCR loan. The line still works if the borrower and property meet the program terms.
A refinance of the first loan later. The second lien has to be paid off or subordinated before the first can be refinanced. Subordination means the second lender agrees to stay behind the new first loan. It is not automatic.
A need bigger than the line. On a rental, lines cap at $500,000. If the equity room is thin or the need is larger, a cash-out refinance is usually the better fit.
Texas. A Texas primary residence is a homestead and caps at 80% combined loan-to-value, so the higher tiers never apply. A 12-day waiting period, a one-lien-at-a-time rule, and 12-month seasoning also bind Texas primary homes only. Texas second homes and investment properties follow the standard tables.
Listed properties. A property listed for sale, or listed within the past 60 days, is ineligible in NC, PA, TN, TX, and WA.
Credit history. A bankruptcy needs 4 years of seasoning from discharge or dismissal. Foreclosure history splits by program. One program seasons a foreclosure at 7 years and a deed-in-lieu, pre-foreclosure, or short sale at 4. The other declines that history entirely.
Property type. Manufactured homes, co-ops, condotels, log homes, commercial, mixed-use, and agricultural-zoned properties are not eligible.
Portfolio size. A borrower is limited to three lines. An investor with more than 15 financed properties is not eligible.
A HELOC on your own home to buy a rental. This is a separate route, and the primary-residence tiers apply. It works well for an all-cash purchase. As a down payment on a financed purchase, it can leave you leveraged close to 100%. Plan for the payment to keep running through vacancy and repairs.
Which Borrower Fits Which Program
| Your situation | Likely fit |
|---|---|
| Rental in your name, 700+ | Investment line, 70% CLTV |
| Rental held in an LLC | DSCR cash-out or vesting change |
| Need above $500,000 on a rental | DSCR cash-out |
| Thin equity after first loan | Wait, pay down, or cash-out |
| Large equity in your home | Primary-residence line |
Across Lendmire’s wholesale network, the files that stall most often share two traits: a first mortgage that already uses most of the CLTV room, and title sitting in an LLC. Checking both before you apply saves the most effort.
When is this the wrong move? It is usually the wrong move if you want a single payment, if your first loan carries a prepayment penalty you cannot avoid, or if your goal is to buy the next property on rent-based approval alone. A HELOC creates the cash you bring to a purchase. It does not buy the property. And it is judged on you, not on the new property’s rent.
Tax treatment varies, so consult a qualified professional before relying on any deduction.
Key Terms Defined
Second lien: A loan recorded behind your first mortgage. It is paid second if the property is sold or foreclosed.
CLTV (combined loan-to-value): Your first mortgage balance plus the new line, divided by the property’s value.
Draw period: The stretch when you can borrow from the line, often with interest-only payments.
Repayment period: The stretch after the draw ends, when you repay principal and interest and can no longer borrow.
DTI (debt-to-income): Your monthly debt payments divided by your monthly income.
DSCR (debt service coverage ratio): Property rent divided by the full monthly payment on the loan. DSCR loans qualify on this instead of your personal income.
Frequently Asked Questions
Does a HELOC change my existing first mortgage?
No. The first loan keeps its balance, term, and payment. The line is a separate loan recorded behind it. The only effect is on your combined leverage and your DTI.
Do I need the same lender for both loans?
No. A second-lien line can come from a different lender than your first mortgage. The first loan just has to permit a second lien. Check your loan documents for restrictions before you apply.
Can I qualify using my rental income?
Not on these lines. A DSCR loan is reviewed primarily on property-level rental income covering the payment, subject to lender guidelines. If your goal is rent-based approval, look at DSCR cash-out instead.
What if my first mortgage balance is too high?
Then the line may fall below the $25,000 minimum or fail the CLTV cap. Your options are paying down the first loan, waiting for the property to appreciate, or replacing the first loan with a cash-out refinance.
What happens if I refinance my first mortgage later?
The line has to be paid off or subordinated first. Subordination needs the second lender’s agreement and is not guaranteed.
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. Lendmire is a mortgage broker that shops select wholesale lenders. It is not the lender. Request a quote and bring your first-mortgage payoff statement.
About Lendmire
Lendmire (NMLS# 2371349) is a mortgage brokerage serving homeowners and real estate investors in its 16 full-service states. Home equity lines of credit are arranged through wholesale lending channels; Lendmire brokers the line and the lender underwrites each application under its occupancy-based guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
Investors who want the broader program framework can review how DSCR loans work.
Get Started
Ready to find the right loan for you?
See your offer in seconds. No credit pull, no obligation.
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. NerdWallet
2. CFPB
3. CFPB – What you should know about home equity lines of credit
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: Best Investment Property HELOC Program on a Property With a Hard Money First Mortgage · Best HELOC Program After Paying Off an Earlier HELOC · Best HELOC Program Without Paying Closing Costs Upfront
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
- North Carolina Insurance Producer · License# 19053198 · Property, Casualty, Life, Health · Verify on NAIC SBS
- Lendmire LLC · Firm NMLS# 2371349 · Verify firm licensure
Required disclosures. Lendmire (NMLS# 2371349) operates as a licensed mortgage broker, not a direct lender or depository. The discussion in this article is general in nature and should not be relied upon as financial, legal, or tax advice — every investment scenario is unique and should be reviewed by a qualified professional. Any loan inquiry is subject to lender underwriting, and this article is not a commitment to lend or a guarantee of approval. Mortgage rates, loan terms, and program guidelines vary by borrower, property, and state, and may change without notice. Equal Housing Opportunity. Verify licensure at NMLS Consumer Access.