Best HELOC Program for Credit Lines Above Half a Million Dollars

The Quick Read: The best program for a line above $500,000 depends on the property you borrow against, because on Lendmire’s wholesale network a line this size is available on a primary residence only. Investment properties and second homes top out at $500,000, subject to lender guidelines and full file review.

• Lines above $500,000 run up to $750,000 and cap at 75% CLTV on a primary residence.
• The credit profile must be 700 or better (720 on the longer-runway structure, covered below).
• A full appraisal is required on every line above $500,000.
• Title must sit with the individual borrower or a revocable living trust, never an LLC.
• A rental owner who needs more than the investment-property ceiling usually compares a DSCR cash-out refinance.

Lendmire is a mortgage broker. It places these files with select wholesale partners and is never the lender. Nothing here is a commitment to lend.

What Counts as a HELOC Above Half a Million Dollars?

A home equity line of credit is an open-end line secured by the property. The CFPB describes a draw period, when you borrow up to your limit, followed by a repayment period with no new draws. Because the property secures the line, falling behind can put it at risk.

Many mainstream lenders stop near $500,000. Above that point, lines are portfolio-style lending, where each lender writes its own rules. That is why the question is about programs, not a single product.

On the network Lendmire works with, the line runs from $25,000 to $750,000. Everything above $500,000 sits in a narrow band, and it belongs to one occupancy type.

Which Properties Qualify for a Line Above $500,000?

Only a primary residence qualifies above $500,000. A second home caps at $500,000, and an investment property caps at $500,000 as well.

The 90% figure exists only at a 720 credit profile and only on lines up to $500,000. Once a primary-residence line goes above $500,000, the ceiling drops to 75% CLTV. Larger lines get tighter leverage, not looser.

Market surveys report that investment-property lines elsewhere often require stronger credit and reserves than primary-home lines, per NerdWallet. On this network, an investment-property line carries a 70% CLTV ceiling and a 700 minimum score.

How Underwriting Treats a Large Line, Step by Step

Underwriting a large line is personal, not property-based. A HELOC is judged on the borrower, while a DSCR loan is judged on the property’s rent against its payment. Here is the sequence.

1. Equity test. Value times the maximum CLTV, minus all existing liens, gives the equity-based line. The size cap then applies on top, and the line is the smaller of the two.

2. Credit. A line above $500,000 needs a 700 or better credit profile (720 on the longer-runway structure). The score is a single-bureau model keyed to the primary wage earner. The report can be no more than 90 days old at closing.

3. Debt-to-income. The ceiling is 50%, and 45% for profiles from 600 to 679. The payment is qualified on the interest-only amount at the maximum draw, not on what you plan to borrow.

4. Valuation. Lines at or below $500,000 usually use automated valuation. Every line above $500,000 needs a full appraisal.

5. Title and property review. The lender checks vesting, property type and exposure limits.

A full appraisal also helps a recently renovated home. An automated model tends to miss recent improvements.

The Two Draw Structures

Two structures exist on this network, and each figure applies only inside its own structure. The first is a higher-leverage program. The second is a longer-runway program, which carries the 720 requirement above $500,000 and a few extra tradeline rules.

On primary residences and second homes, a line can run a 3-year interest-only draw with a 17-year repayment, or a 5-year interest-only draw with a 25-year repayment. Tennessee shortens both. Investment lines use the 5-year draw and 25-year repayment only.

Three features apply across both:

• At least 75% of the line is drawn at closing.
• Pricing floats through the draw and repayment periods and never converts to fixed.
• Repayment is fully amortizing, so the payment steps up when the draw ends.

That last point deserves modeling. A balance that was interest-only for years becomes a larger obligation at the switch. Run the repayment-period obligation before you commit, not just the draw-period one.

Where the General Rule Breaks

The rule is that big lines go to primary residences. These edge cases change the answer.

LLC-owned rentals. LLCs, corporations, partnerships, and land or irrevocable trusts cannot hold title. A property already deeded to an LLC needs a vesting change or a different product. A DSCR cash-out refinance can fit better here.

Using a primary-home line to fund rentals. This is the common investor route. The borrower pledges the residence and uses the proceeds to buy or improve rentals. The credit risk then rests on the home you live in.

Large rental portfolios. 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 one. Owning more than 15 financed properties makes a borrower ineligible.

Property type. Single-family, 2-4 units, PUD, townhome and condominium (including non-warrantable) are eligible. Manufactured homes, co-ops, condotels, log homes, commercial, mixed-use and agricultural zoning are not offered.

Texas. A Texas primary residence is a homestead and caps at 80% combined loan-to-value, so the higher matrix tiers never apply there. Texas second homes and investment properties follow their standard tables.

Listings. In NC, PA, TN, TX and WA, a property listed for sale, or listed within the past 60 days, is ineligible. Availability covers 16 full-service states only (AL, CA, CO, FL, GA, IN, MI, MT, NM, NC, OH, PA, TN, TX, VA, WA), narrower than the 41-market DSCR footprint.

Which Program Fits Which Situation?

The right fit comes from four variables: occupancy, credit, leverage need and title. This table maps common situations. Whether a given file clears depends on the lender’s guidelines.

A broker matters here because the two wholesale structures differ. A broker that shops multiple wholesale lenders can match the draw structure, credit tradelines and property type to the program.

Illustrative Scenarios (Percentages and Ratios Only)

Treat these as modeled assumptions, not quotes.

Scenario one. A homeowner with a primary residence and a 720 credit profile wants a line above $500,000. The program ceiling for a line that size is 75% CLTV, not 90%. If existing liens already use most of that 75%, the available line may fall well short of the cap. Equity, not the headline maximum, sets the number.

Scenario two. An investor with a rental at a 700 score wants the same size line against the rental. The ceiling is 70% CLTV and the line caps at $500,000. A $500,000 line may not be reachable if a first mortgage already consumes much of the 70%. A DSCR cash-out refinance sized to rent coverage may fit better, since it is judged on the property’s rent against its payment.

Scenario three. A borrower with a 650 profile wants the largest line available. A primary-residence line above $500,000 is out of reach, since the floor is 700. A smaller primary-residence line may be possible, and a DSCR file is reviewed on a different basis.

A HELOC is underwritten on the borrower. When personal income is thin or the property is entity-held, DSCR becomes the natural comparison. Lendmire’s complete DSCR loans guide explains how that coverage test works.

A Practitioner Note on Large Lines

Across files like these, the most common surprise is the gap between the headline cap and the equity result. Borrowers see a $750,000 maximum and assume it applies to them. In practice the CLTV math against existing liens sets the real limit, and a first mortgage on a recently purchased home often leaves less room than expected. Running the subtraction before applying avoids the disappointment.

HELOC or Cash-Out Refinance?

A cash-out refinance replaces the first mortgage. A HELOC sits beside it in first or second lien position. If your current first mortgage is well suited to you, a standalone line keeps it intact. Whether that beats refinancing everything depends on the size of both balances and on how the line’s floating pricing compares with the first mortgage you would give up. Run both paths side by side before choosing.

Rental owners should also compare a DSCR route that qualifies primarily on property-level rental income covering the payment, subject to lender guidelines.

Tax treatment can depend on how the funds are used and how the property is held. Borrowers should keep clear records and speak with a qualified tax professional before relying on any deduction.

Key Terms Defined

CLTV (combined loan-to-value): The total of all liens, including the new line, divided by the property’s value.

Draw period: The stretch when you can borrow against the line, with interest-only payments on this network.

Repayment period: The phase after draws end, when the balance amortizes fully.

Vesting: How title is held, such as an individual or a revocable living trust.

Exposure: The total of your lines with the lender, which is capped at the limits above.

What to Prepare Before You Apply

• Government ID and income documentation under the applicable program.
• Current mortgage statements for every lien on the property.
• Proof of homeowners insurance.
• Title or vesting documents showing the individual or revocable trust.
• A list of your other financed properties.
• A recent credit report, which can be no more than 90 days old at closing.

For rentals, add leases. If a recent renovation raised value, ask for a full appraisal. It may support a higher appraised value, depending on comps and underwriter 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.

Large lines reward the borrower who does the equity subtraction first, picks the occupancy that actually reaches the size they need, and keeps a DSCR cash-out ready as the fallback for rental-held equity.

About Lendmire

Lendmire, NMLS# 2371349, is a mortgage brokerage that arranges home equity lines of credit through wholesale lending partners in its 16 full-service states. Lines on primary residences, second homes and investment properties are each reviewed individually by the lender under the program’s occupancy, credit and combined-loan-to-value guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. CFPB – What is a HELOC

2. NerdWallet – HELOC on investment property

3. CFPB HELOC booklet