The Quick Read: A line’s size comes from one equation: the property’s value times the lender’s combined loan-to-value cap, minus every lien already recorded, then trimmed by dollar limits and debt-to-income, so the path to a bigger line is raising value, cutting liens, reaching a higher credit tier, and choosing the occupancy with the most room.
- On an investment property, the ceiling across Lendmire’s network is 70% combined loan-to-value, with a 700 minimum credit profile and a $500,000 maximum line.
- On a primary residence or second home, the ceiling reaches 90% only at a 720-or-better credit profile.
- Four levers actually move the number, and credit tier, lien paydown and appraised value are among them.
- Debt-to-income or the dollar cap can bind before the percentage cap does.
- Equity lines are underwritten on personal credit and income, not on rent, so they sit beside a DSCR cash-out rather than inside it.
What Does Combined Loan-to-Value Actually Limit?
Combined loan-to-value, or CLTV, caps the total of all liens on a property as a share of its value. The new line, the first mortgage, and any other recorded liens all count. A lender never lends against 100% of equity, so some equity always stays untouched.
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.
The formula is simple. Maximum new line equals value times the cap, minus existing liens. Two inputs move it: the cap, which depends on occupancy and credit, and the value, which comes from an automated valuation or an appraisal.
A HELOC is a revolving credit line. NerdWallet notes that fewer lenders offer one on a rental, and that borrowers can usually access less than on a primary home. That matches what a broker sees across wholesale lenders. Rentals get lower caps and a thinner lender field.
Lendmire arranges these lines through select wholesale partners and is not the lender. Equity lines are available only in Lendmire’s 16 full-service states, which is narrower than the 41-market DSCR footprint that includes Washington, D.C. Every figure below is subject to lender guidelines and full file review.
Key Terms Defined
CLTV (combined loan-to-value): All liens on the property added together and divided by the property’s value.
HELOC: A revolving line of credit secured by real estate, with a draw period followed by a repayment period.
Lien position: Where a loan ranks for repayment; a standalone line can sit in first or second position.
Draw period: The early stretch when you can borrow from the line and pay interest only.
DTI (debt-to-income): Your monthly debts divided by your monthly income, which can limit the line before CLTV does.
Full-line sizing: Counting the entire credit limit toward CLTV, not just the amount you drew.
How Does Underwriting Size a Line, Step by Step?
Underwriting works through five steps, and the smallest result wins. The line you receive is the lowest of the CLTV room, the program’s dollar cap, and what your debt-to-income supports.
1. Establish value. Lines at or below $500,000 ordinarily use an automated valuation with no traditional appraisal. A higher CLTV may call for a secondary valuation. A full appraisal is required on every line above $500,000, and a borrower may request one in any case.
2. Pick the cap. The cap follows occupancy first, then credit tier.
3. Count the lien stack. Add the first mortgage, any other junior lien, and any existing line at its full limit.
4. Apply the cap. Multiply value by the cap, then subtract the stack.
5. Test the other limits. Check the dollar ceiling and DTI. For DTI, the network tops out at 50%, and the line is tested on the interest-only payment at the maximum draw.
Here is the back-solve version. Say you want room equal to 25% of value. You need a cap at least 25 points above your first-mortgage balance, as a share of value. If your first mortgage is 50% of value, you need a 75% cap. If the cap in your tier is 70%, the answer is a smaller line or a different plan.
For a deeper look at the same arithmetic from the lender’s side, see Lendmire’s piece How a Lender Sizes a HELOC by Combined Loan-to-Value.
What Are the Network Caps by Occupancy?
Caps on this network are tiered by occupancy, so no single ceiling applies to every property. An investment line stops at 70% CLTV. Primary-residence and second-home lines can reach 90%, but only at a 720-or-better credit profile.
| Occupancy | Ceiling | Minimum credit | Maximum line |
|---|---|---|---|
| Primary residence | 90% at 720+ | 600 | $750,000 |
| Second home | 90% at 720+ | 640 | $500,000 |
| Investment property | 70% | 700 | $500,000 |
On a primary residence, the credit ladder runs like this. A 720 profile reaches 90% on lines up to $500,000. A 660 profile reaches 85% on lines up to $500,000. A 640 profile reaches 80%. A 620 profile reaches 70% on lines up to $400,000, and 600 reaches 60% up to the same dollar limit.
Lines above $500,000 are primary-residence only. They require a 700-or-better credit profile (720 on the longer-runway program), cap at 75% CLTV, and need a full appraisal. The two programs are introduced in the structures section below.
On a second home, the ladder is shorter. A 640 profile reaches 75%, 660 reaches 80%, 680 and 700 reach 85%, and 720 reaches 90%, all on lines up to $500,000.
On an investment property, credit above 700 does not lift the cap. A 700 profile and a 720 profile both sit at 70%. That means credit improvement buys nothing past the floor on a rental, so the levers there are value and lien paydown.
Market surveys describe a wide spread of caps on rental equity lines, depending on the lender. For this network, the investment ceiling is 70%.
Four Scenarios Show Where the Limit Really Sits
The mechanics become clear when the same formula meets different homes. These scenarios use percentages of value, so the dollar conversion stays with your own numbers.
| Profile | First mortgage | Cap | Room |
|---|---|---|---|
| Rental, 700+ credit | 45% of value | 70% | 25% of value |
| Rental, 700+ credit | 75% of value | 70% | Zero |
| Primary, 720+ credit | 40% of value | 90% | 50% of value on paper |
| Primary, 660+ credit | 87% of value | 85% | Zero |
The first row is the healthy rental case. The 25% of value is a ceiling, and the $500,000 maximum line still applies.
The second row is the zero-room case. A rental already financed above the 70% ceiling has no room, whatever the credit score. A paydown or higher value is the only route.
The third row shows a cap that is not the binding limit. The percentage says 50% of value, but the dollar ceiling is $500,000 at that tier. On a high-value home, the dollar cap is the real limit.
The fourth row is a primary residence already over its tier cap, so no line is possible.
How Much Does Each Step Up in Cap Buy?
On the same home, each step up the credit ladder adds room equal to the difference in caps. Take a primary residence with a first mortgage at 55% of value.
| Credit tier | Max CLTV | Room as share of value |
|---|---|---|
| 620+ | 70% | 15% |
| 640+ | 80% | 25% |
| 660+ | 85% | 30% |
| 720+ | 90% | 35% |
Moving from 620 to 640 adds ten points of room. Moving from 660 to 720 adds five more. The dollar caps still apply, with $400,000 at the 620 tier and $500,000 above it.
A primary residence in Texas is a homestead, which caps at 80% combined loan-to-value. The higher tiers never apply there. New Mexico and Ohio set a cap that depends on the credit profile. Those details change the table, so confirm them before you plan around a tier.
Which Levers Raise the Line?
Four levers move the number, and they work in different ways. Not every one is worth the cost.
Pay down the first mortgage. Each dollar of principal reduction adds a dollar of room. On a rental, this is often the only lever, since credit above 700 does not raise the 70% cap. The tradeoff is liquidity. Cash used to pay down principal is cash you no longer hold.
Raise the value side. An improvement may support a higher appraised value, depending on comps and underwriter review. Gather recent comparable sales and a list of capital work. On lines at or below $500,000, you can request a full appraisal instead of the automated valuation when you believe comps support more value.
Climb a credit tier before you apply. The report can be no more than 90 days old at closing, with no rescores. Fix errors and pay down card balances before the pull, not after. This lever is real on primary residences and second homes, and it is nearly useless on a rental.
Ask for a smaller line. At least 75% of the line is drawn at closing, and pricing floats through both the draw and repayment periods. Borrowing the full amount to leave room “just in case” costs real interest. Size the line to the use of funds.
Where Do Debt-to-Income and Dollar Limits Bind First?
For many investors, personal DTI binds before CLTV does. The network’s DTI ceiling is 50%, and it drops to 45% for credit profiles from 600 to 679. A ratio above 45% requires a 680 minimum.
The test uses the interest-only payment on the maximum draw. So a large line with plenty of CLTV room can still fail on income. The investor with many financed properties feels this most.
Exposure limits matter too. A borrower can hold three lines at most. Combined exposure caps 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.
Equity lines do not look at rent. DSCR loans do. A DSCR loan is reviewed primarily on property-level rental income covering the payment, subject to lender guidelines. Clearing a 1.00 coverage ratio is not the same as positive cash flow, since repairs, vacancy, management and capex sit outside the calculation.
What Structures Exist?
Lendmire places equity lines with two wholesale programs. This article calls them the higher-leverage program and the longer-runway program, since their terms differ.
On primary residences and second homes, two draw structures exist. One has a 3-year interest-only draw and a 17-year repayment period. The other has a 5-year draw and a 25-year repayment period. Tennessee shortens both, to 3 years and 12 years, and to 5 years and 10 years.
Investment lines run only the 5-year draw and 25-year repayment structure. Pricing floats the whole time and never converts to a fixed rate.
NerdWallet describes a common market structure of a 10-year draw followed by repayment of up to about 20 years. The network’s lines are shorter on the draw side, so match your plan to the structure.
A line can sit in first or second lien position. Lines run from $25,000 to $750,000, with a $10,000 floor in Michigan. The minimum draw after closing is $1,000, or $4,000 in Texas.
Where Does the General Rule Break?
Several edge cases change the math.
Title and vesting. The line requires title held by the individual borrower or a revocable living trust. LLCs, corporations, partnerships, and irrevocable, blind or land trusts cannot hold title. This is the sharpest difference from a DSCR loan, which can lend to entities, subject to program terms. A property already deeded to an LLC needs a vesting change first, or a DSCR cash-out instead.
Property type. Single-family, 2-4 units, PUDs, townhomes and condominiums are eligible, including non-warrantable condominiums. Manufactured homes, co-ops, condotels, log homes, commercial, mixed-use and agricultural-zoned property are not offered. A 2-4 unit property needs a 640 minimum on the longer-runway program.
Listed properties. A property listed for sale, or listed within the past 60 days, is ineligible in Indiana, North Carolina, Pennsylvania, Tennessee, Texas and Washington.
Rental restrictions. The CFPB’s HELOC booklet notes that renting out a home may be prohibited under a line’s terms. Check the covenants before you use a primary-home line to buy or fund a rental.
Freezes. The same booklet explains that a lender may freeze or reduce a line if the home’s value falls or the borrower’s finances worsen. The cushion between your line and the cap can vanish after a price drop. That makes an equity line a weak emergency source for a rental portfolio.
Existing lines. An existing line is counted at its full limit. A third lien must fit under the same combined cap.
When Should You Not Max Out?
Borrowing to the cap is a choice, not a goal. Three situations argue for leaving room.
The first is thin personal cushion. The CFPB warns that a borrower who falls behind could lose the home when it secures the line. A floating payment on the full line makes that risk larger.
The second is a plan to buy more rentals. A line counts toward DTI, which can limit later DSCR or other approvals.
The third is a stretched post-closing position. If a price drop would push your CLTV above the cap, a freeze or reduction becomes possible. Stress-test your number against a modest value decline before you commit.
HELOC or DSCR Cash-Out?
The two products solve the same problem in different ways. A HELOC leaves a low first mortgage in place and adds a lien. A DSCR cash-out replaces the first mortgage and qualifies primarily on rental income, subject to lender guidelines.
On standard rentals, DSCR cash-out generally tops out around 75% LTV (short-term-rental cash-out sits near 70%). The usual expectation is about 6 months of seasoning. That ceiling is five points above the 70% investment-line ceiling, and the loan can also be held by an LLC, subject to program terms.
The equity line wins when the first mortgage is small or unusually cheap to keep. The DSCR cash-out tends to win when you want entity ownership, more proceeds, or an underwriting basis that does not depend on your personal DTI. For the full picture, see the complete DSCR loans guide.
Lendmire also covers how combined limits apply to both lines and home equity loans.
A Quick Self-Estimate Worksheet
1. Pick the occupancy that matches the property.
2. Find the cap for your credit tier on the tables above.
3. Multiply value by the cap.
4. Subtract the first mortgage and any other lien, with existing lines at full limit.
5. Compare the result with the dollar cap for that occupancy.
6. Test your DTI at the interest-only payment on the maximum draw.
7. Take the smallest of the three results.
The site’s calculator offers an editable, illustrative estimate of this arithmetic. It is not a quote or a commitment to lend.
Frequently Asked Questions
What is the largest HELOC I can get?
It depends on occupancy. A primary residence can reach $750,000, but lines above $500,000 need a 700-or-better credit profile (720 on the longer-runway program), a 75% CLTV cap and a full appraisal. Second homes and investment properties top out at $500,000.
Can I borrow all of my equity?
No. The CLTV cap keeps part of the equity untouched. On an investment property the cap is 70%, so at least 30% of value stays unborrowed. Even at the 90% primary-residence tier, 10% stays out of reach.
Does only the drawn balance count toward the cap?
Conservative underwriting counts the full line, not just the draw. At least 75% of the line is also drawn at closing, so little of the line stays unused. Plan your cap math on the full limit.
Can an LLC-owned rental get a HELOC?
Not directly. Title must sit with the individual borrower or a revocable living trust. A property held in an LLC needs a vesting change, or a DSCR cash-out may fit better.
Does better credit always raise the cap?
On primary residences and second homes, yes, up the tiers to 90% at 720. On investment properties, no.
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. Reach the team at 828-256-2183.
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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References
1. NerdWallet – HELOC on an investment property
2. CFPB – What You Should Know About Home Equity Lines of Credit (booklet)
3. CFPB
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: Can You Get a HELOC Behind an Existing VA Loan? · HELOC Limits for a Primary Home With an Existing Mortgage · Can a HELOC Borrower Exceed the Combined Loan-to-Value Limit?
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.