The Quick Read: A HELOC lets you borrow against equity as a second lien while your existing first mortgage keeps its balance, term, and payment, so the terms that matter most are combined leverage, draw and repayment structure, how pricing floats, the fee stack, freeze rights, and whether your title and property type are eligible at all. Every figure below is subject to lender guidelines and a full file review.
- Your first mortgage stays put. Only the new money gets new pricing.
- Leverage depends on occupancy. The ceiling is 70% combined loan-to-value on an investment property. It reaches 90% on a primary residence or second home, and only at a 720 credit profile or better.
- The line is not a standby account. At least 75% of it is drawn at closing, and pricing floats rather than converting to fixed.
- Title decides first. An LLC cannot hold title on these lines, which is the sharpest difference from a DSCR loan.
- Read the structure before the price. Draw length, repayment length, and the payment step-up matter more than any introductory number.
What Does a HELOC Do When You Keep Your First Mortgage?
A HELOC is a revolving line of credit secured by your property. When you keep a low first mortgage, the line sits behind it in second position. The first loan is not refinanced, so its balance, term, and payment do not change. Only the money you add to the stack carries new pricing.
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 is the whole appeal. A cash-out refinance replaces the first mortgage and applies new pricing to the entire balance. A HELOC leaves the low-cost first loan alone.
Lendmire, a mortgage broker arranging financing through select wholesale partners, sees two draw structures on these lines:
- 3-year draw: interest-only payments for three years, then 17 years of fully amortizing repayment.
- 5-year draw: interest-only payments for five years, then 25 years of fully amortizing repayment. This is the longer-runway program, and it is the only structure available on investment lines.
NerdWallet’s HELOC explainer says many lines run a 10-year draw followed by up to 20 years of repayment. Treat that as a market-wide picture. The structures above are what the network offers.
These lines are available in Lendmire’s 16 full-service states only. That is narrower than the 41-market DSCR footprint, so confirm your state first.
Key Terms Defined
Combined loan-to-value (CLTV): your first mortgage balance plus the new line, divided by the property’s value. Lenders cap it by occupancy and credit tier.
Second lien: a loan that sits behind your first mortgage. If the property is ever sold under default, the first lender is paid first.
Draw period: the stretch when you can borrow from the line. Payments are interest-only here.
Repayment period: the stretch after the draw ends. Borrowing stops, and payments cover principal and interest.
Index and margin: pricing on a floating line is an outside benchmark (the index) plus a fixed add-on (the margin). The margin is the part that stays with you.
Minimum subsequent draw: the smallest amount you can pull after closing. On the longer-runway program it is $1,000 in most states.
Freeze: the lender’s right to stop further draws, or cut the limit, in limited situations.
How Is Your Line Actually Sized?
Lenders size the line from value, then subtract what you already owe. The CFPB’s HELOC booklet lays out the method: take the appraised value, apply the lender’s percentage, then subtract the mortgage balance. Income, debts, and credit history then set the final limit.
A low first-mortgage balance helps because it leaves more room under the CLTV ceiling. Its low pricing does not enter the math at all. Here is how the steps run on this network.
1. Occupancy sets the ceiling. Investment, second home, and primary residence each carry different limits (see the table).
2. Credit tier sets the percentage. A 720 score or better unlocks the top tiers. Pricing and available terms vary by lender, borrower profile, property type, and full underwriting review.
3. DTI sets the ceiling on payments. Debt-to-income may run to 50% at most. It drops to 45% for profiles from 600 to 679, and anything above 45% needs a 680 minimum.
4. The payment is tested at the maximum draw. Lenders review your file on the interest-only payment calculated on the full line, not on what you plan to use.
5. Your first mortgage payment counts. It sits in your DTI right alongside the new line.
| Occupancy | Top CLTV | Minimum score | Max line |
|---|---|---|---|
| Investment property | 70% (700+ score) | 700 | $500,000 |
| Second home | 90% (720+ only) | 640 | $500,000 |
| Primary residence | 90% (720+ only) | 600 | $750,000 (75% CLTV above $500,000) |
Run a modeled example with placeholder numbers, not market data. Say your first mortgage equals 45% of your home’s value. On an investment property at 70% CLTV, you have room for a line worth about 25% of value, before the $500,000 cap applies. On a primary residence at 720+, the 90% tier would leave far more room. The occupancy label moves the answer more than almost anything else.
One more sizing note. A line above $500,000 is primary-residence only. It needs a credit profile of 700 or better (720 on the longer-runway program), caps at 75% CLTV, and requires a full appraisal.
The Terms Checklist, in the Order to Read Them
Read the structure terms before the pricing. A cheap-looking offer with a bad structure costs more than a plain one. Use this order.
1. Lien position. Confirm the line sits second behind your first mortgage. Red flag: any language that puts it ahead, or that requires the first loan to be paid off.
2. CLTV room. Ask what combined percentage the lender is using for your occupancy and score. Red flag: a figure that matches a better occupancy tier than yours.
3. Pricing formula. Ask for the index, the margin, and any caps on how far pricing can move. The CFPB booklet advises looking at the margin, not just an introductory figure. Experian’s draw-period guide notes that variable lines generally cap how much pricing can rise at once and over the loan term. On this network, pricing floats through the draw and repayment, and it never converts to fixed.
4. Draw length. Ask whether it is three years or five. Red flag: not knowing which structure your quote is built on.
5. Repayment structure. Confirm the repayment is fully amortizing. Experian flags that some market HELOCs carry a balloon payment, meaning the whole balance comes due when the draw ends. The structures described here amortize fully, but check the note either way.
6. Draw at closing. At least 75% of the line is drawn at closing. Red flag: planning to leave the line empty to avoid interest. That tactic does not fit this structure.
7. Minimum later draws. The longer-runway program states a $1,000 minimum after closing. A few states set higher minimums, so confirm yours.
8. Fee stack. Ask about application, appraisal, annual, early-closure, and transaction fees. The CFPB booklet also notes that a HELOC’s APR reflects only the periodic charge, so it leaves out points and other costs.
9. Freeze and reduction rights. The Philadelphia Fed’s Consumer Compliance Outlook explains one trigger: a significant decline in the home’s value below its appraised value. Ask what else triggers a freeze and whether you must be notified.
10. Valuation method. Lines at or below $500,000 ordinarily run an automated valuation with no traditional appraisal. A higher CLTV may require a secondary valuation. Every line above $500,000 gets a full appraisal, and you may request one on any line.
Which Terms Are Deal-Breakers?
Rank the items so you know where to push and where to move on.
Deal-breakers. Lien position, title eligibility, a balloon you cannot refinance, and a payment test you cannot pass at the maximum draw. Any one of these ends the conversation.
Worth negotiating. Fees, the margin, and whether early-closure charges apply. Ask what is negotiable, because the answer varies by lender.
Minor. The exact size of the minimum later draw, as long as it fits how you actually borrow.
Credit details also shape the file. The score model is a single-bureau score keyed to the primary wage earner. The report can be no more than 90 days old at closing, and rescores are not allowed. Tradeline and housing-history standards vary by program. The longer-runway program wants two tradelines seasoned 12 months, or one seasoned 24.
What Happens When Interest-Only Ends?
The payment steps up when the draw period ends. Picture a line with a 5-year draw. For five years you pay interest only, and the balance never shrinks. In year six, the same balance starts amortizing over 25 years, so each payment now includes principal. The 3-year draw does this sooner, with a 17-year repayment.
Interest-only does not mean cheap. It means the cost of the balance is deferred. If you plan to repay from a sale or a refinance, check that your plan does not depend on the payment staying low.
Where the General Rule Breaks
Entity title. The lines are held by an individual borrower or an inter vivos revocable living trust. LLCs, corporations, partnerships, and irrevocable, blind, or land trusts cannot hold title. A property already deeded to an LLC needs a vesting change, or a DSCR cash-out refinance instead, subject to lender program eligibility.
The investment lender pool is small. NerdWallet’s rental-property HELOC guide says these lines come from a smaller group of lenders with lower limits. It reports that market surveys show maximum LTV of 80%, with many lenders below 70%. The network figure for an investment property is 70% CLTV, with a 700 minimum score, and no tier above it.
Property type. Eligible types include single-family, 2-4 units (640 minimum on the longer-runway program), PUDs, townhomes, and condominiums, including non-warrantable ones. Modular factory-built homes are eligible on the longer-runway program only. Manufactured homes, co-ops, condotels, log homes, commercial, mixed-use, and agricultural zoning are not offered.
Credit history. A bankruptcy needs 4 years of seasoning from discharge or dismissal. Foreclosure history splits by program on primary residences and second homes. One program accepts a foreclosure after 7 years and a short sale or deed-in-lieu after 4. The other declines the history regardless of age.
Exposure limits. A borrower may hold three lines at once, and an owner of more than 15 financed properties is not eligible.
Listing status. In some states, a property listed for sale, or listed within the past 60 days, is ineligible. A few states also adjust draw lengths, minimum draws, or waiting periods, so ask about yours.
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.
HELOC or DSCR Cash-Out?
A HELOC qualifies the person. A DSCR cash-out refinance qualifies primarily on property-level rental income covering the payment, subject to lender guidelines. Pick by title, cash need, and personal DTI.
Here is how the two compare on this network:
- Title. A DSCR loan can close in an LLC name. A HELOC cannot.
- First mortgage. A HELOC keeps it. A cash-out refinance replaces it, and it tops out around 75% LTV, with about six months of seasoning as the common expectation.
- Coverage. The coverage ratio compares rent to the full monthly obligation. Many select programs start at 1.00. A separate select-lender path goes below 1.00, with leverage and terms adjusted.
- Cash flow. Clearing 1.00 does not mean positive cash flow. Repairs, vacancy, management, and utilities sit outside the calculation. The exact numbers vary by lender and program and follow a full review of property, leverage, and credit.
The complete DSCR loans guide covers the full set of requirements. For the side-by-side with your low first mortgage in mind, see Lendmire’s piece HELOC vs Cash-Out Refinance for Homeowners Keeping a Low First Mortgage.
A larger cushion of equity helps both paths. It never erases leverage caps, credit floors, reserve rules, or property eligibility. The strongest files clear both tests: enough equity and enough coverage or personal income.
What to Gather Before You Compare
Bring three things: a recent first-mortgage statement, your homeowner’s insurance declaration page, and your vesting deed. The deed answers the title question before anyone spends time on pricing.
At signing, treat these as red flags:
- Language that puts the line ahead of your first mortgage.
- A draw schedule that does not match the structure you were quoted.
- A balloon payment you did not expect.
- Fees that appear only in the final paperwork.
- A title requirement you did not know about.
For more on how these lines work on rental collateral, read Lendmire’s guide to investment property HELOC terms when you keep a low first mortgage.
Frequently Asked Questions
Does a HELOC change my first mortgage?
No. The first loan keeps its balance, term, and payment. The HELOC is a separate loan behind it. Both are secured by the same property, so falling behind on either puts the property at risk.
Can I open the line and leave it at zero until I find a deal?
Not on this network. At least 75% of the line is drawn at closing, and pricing floats from that point forward. If you want a standby line, ask a lender whether its structure allows one before you apply.
What happens if my home’s value drops?
The lender may freeze further draws or reduce the limit in limited situations. A significant decline in value is one example. Ask what triggers a freeze and how you will be told.
Can my LLC-owned rental take a HELOC?
Generally no. Title must be held by an individual or a revocable living trust. A DSCR cash-out refinance is the usual alternative when the property is held in an LLC, subject to program terms.
Do I have to use my current mortgage lender?
No. A broker such as Lendmire compares options across select wholesale partners. The comparison is on property, equity, credit profile, combined leverage, and your goals.
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. A HELOC sits behind your first mortgage, so if you have a low first mortgage, that loan is worth protecting.
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.
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References
1. NerdWallet, what is a HELOC
3. Experian, what is a draw period on a HELOC
4. Philadelphia Fed Consumer Compliance Outlook, HELOC plans
5. NerdWallet, HELOC on an investment property
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 as a Second Lien for Homeowners Keeping a Low First · How to Compare HELOC Offers When Keeping a Low First Mortgage · HELOC Rules for a Homeowner Who Won’t Give Up a Low First Mortgage
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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- 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.