HELOC Down Payment Requirements for Buying Another Home

The Quick Read: A home equity line of credit (HELOC) has no down payment rule of its own, because two separate lenders set the requirements: the one that opens the line against a home you already own, and the one that funds the purchase and decides whether borrowed money is acceptable as your cash in.

• The line must exist before you go under contract, because its collateral has to be a property you already own.
• Across Lendmire’s wholesale network, the maximum combined loan-to-value (CLTV) on a line depends on occupancy: 70% on an investment property, and up to 90% on a primary residence or second home only at a 720-or-better credit profile.
• On a DSCR purchase, most files land at 75%-80% loan-to-value (LTV), meaning 20%-25% down, and select high-leverage programs reach 85% LTV with roughly a 700+ score.
• Acceptance of borrowed down payment funds varies by purchase program, so ask before you draw.
• The line’s payment never enters the DSCR ratio, but it still comes out of your real cash flow.

Key Terms Defined

HELOC: A revolving line of credit secured by a home you own, which you can draw from as needed up to a set limit.

Second lien: A loan that sits behind your first mortgage. If the home is sold or foreclosed, the first mortgage gets paid before the second.

CLTV (combined loan-to-value): Your first mortgage balance plus the new line, divided by the home’s value.

DSCR (debt service coverage ratio): The property’s monthly rent divided by its monthly housing payment, which a DSCR lender uses to judge whether the rental carries itself.

PITIA: Principal, interest, taxes, insurance, and association dues, the full monthly housing payment on a property.

Seasoning: The time money has sat in your account, or a property has been owned, before a lender will count it.

Reserves: Liquid savings a lender wants left over after closing, separate from your down payment and closing costs.

The Two Sets of Requirements, Side by Side

A HELOC down payment plan has to clear two gates, and passing one tells you nothing about the other. The first gate is the line itself: equity, credit, and debt load on the home that secures it. The second gate is the purchase: leverage, rental coverage, reserves, and how that lender treats borrowed funds.

The two gates often get blurred together, and that is where plans fall apart. An investor gets a generous line approved and assumes the hard part is over. Then the purchase lender says the funds are borrowed, the property rent is thin, and the reserves are missing.

Everything in the left column is subject to lender guidelines and a full file review, and every figure applies only within the program that states it.

How Underwriting Treats a HELOC Down Payment, Step by Step

Underwriting here is a sequence, and the order matters. Skip a step or run them out of order and the plan stalls.

Step 1: Open the line against a home you already own. You cannot open a line on the property you are about to buy, because there is nothing to pledge yet. The line lender checks your credit, your equity, your existing liens, and your debt load. Lines at or below $500,000 usually run an automated valuation instead of a traditional appraisal, though a higher CLTV can trigger a second valuation, and you may always request a full appraisal. Every line above $500,000 requires one.

Step 2: Draw the money and leave a paper trail. On the programs in Lendmire’s network, at least 75% of the line is drawn at closing. After that, the minimum subsequent draw is generally small. A draw that moves from the line account to your bank account is easy to trace. An unexplained deposit is not.

Step 3: The purchase lender reviews the source. This is the gate most investors underestimate. Across the network, programs differ on borrowed funds. Some accept a documented draw. Some cap the borrowed share and want a slice of seasoned cash of your own. The strictest want an unborrowed portion of the down payment. A plan that is 100% borrowed can fail on that one point alone.

Step 4: The DSCR test runs on the new property only. The lender divides monthly rent by the new property’s PITIA. A line secured by a different home sits outside that ratio. Many select programs start at 1.00, meaning rent just covers the payment. A separate select-lender path takes coverage below 1.00, with leverage and terms adjusted. Stronger ratios open better pricing and leverage.

Step 5: Down payment, closing costs, and reserves are separate buckets. Borrowed money is often accepted for the down payment and closing costs but commonly excluded from reserves. The same dollars generally cannot count twice. Reserves vary by lender, leverage, loan size, and transaction type. Around 6 months of PITIA is common, conservative rate-and-term files at modest leverage under $1,500,000 can see reserves waived, and larger loans typically step up to about 9 months.

What the Line Itself Requires

Start with the basics of the product. A HELOC is an open-end line of credit you can borrow against repeatedly, and the CFPB describes the draw period and the repayment period that follows. It also warns that if you fall behind, you could lose the home. Equity is the home’s value minus what you owe, and the CFPB’s HELOC booklet explains that you can borrow only a percentage of it, not all of it.

The line is judged on you and the collateral. You pay interest only on the amount you actually borrow, not on the full limit, and the draw period can be interest-only. That helps early on, but it means the payment can step up later when full repayment begins.

Here is how the network’s equity line parameters break out by occupancy, because one ceiling does not fit every property.

Those ceilings step down with the credit profile. A primary residence at 700+ reaches 85% CLTV up to $500,000, and at 640+ reaches 80%. A second home at 660+ reaches 80%, and at 640+ reaches 75%. A larger primary-residence line, up to $750,000, caps at 75% CLTV.

A line above $500,000 is primary-residence only, needs 700 or better (720 on the longer-runway structure), caps at 75% CLTV, and requires a full appraisal. Broader market surveys often quote different CLTV figures for equity lines, but those describe the wider market. The network figures above are the ones that apply here.

The line lender also tests your debt load. DTI maxes out at 50%, drops to 45% for credit profiles from 600 to 679, and the lender reviews your file on the interest-only payment calculated on the maximum draw. Credit reports must be recent at closing, and a bankruptcy needs 4 years of seasoning from discharge or dismissal.

Structures and Variations

The line can take two draw shapes on a primary residence or second home. One runs a 3-year interest-only draw followed by a 17-year repayment period. The other runs a 5-year draw followed by a 25-year repayment period. Investment lines use the 5-year draw and 25-year repayment shape only. Pricing floats through both the draw and the repayment period and never converts to fixed. If you quote a figure from one structure, it needs to carry that structure’s terms with it.

The line can sit in first or second lien position. If you have a mortgage, it is almost always a second lien, which the CFPB describes as a second mortgage paid on top of the first. Lendmire’s piece How a Second-Lien HELOC Down Payment Shapes Second-Home Buying Power goes deeper on that angle.

A few more structural limits apply. A borrower is limited to three lines and cannot own more than 15 financed properties. Eligible collateral includes single-family homes, 2-4 units, townhomes, planned unit developments, and condominiums, including non-warrantable ones. Manufactured homes, co-ops, condotels, log homes, commercial, mixed-use, and agricultural zoning are not eligible.

The line is available only in Lendmire’s 16 full-service states, which is narrower than the 41-market DSCR footprint, including Washington, D.C. Lendmire brokers these files through select wholesale partners and is never the lender.

Where the General Rule Breaks

The rules above hold for most files. These edge cases are where they stop holding.

An undrawn line is not money. A purchase lender treats an open but unused line as permission to borrow, not as cash. Until you draw it and document it, it does nothing for your down payment.

A property listed for sale can be ineligible. In several states, a home that is listed, or was listed within the past 60 days, cannot secure the line. That surprises investors who plan to sell one property to fund the next.

LLC ownership blocks the line. Title must sit with 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, where an investor can often buy through an LLC, subject to program terms. A rental already deeded to an LLC needs a vesting change before it can secure a line, or a DSCR cash-out refinance instead.

A line on a rental is harder to get. The White Coat Investor notes that lenders see higher default risk on investment property, which makes these lines harder to get than lines on a primary home. On this network, that shows up as a 70% CLTV ceiling and a 700 minimum credit score. A DSCR cash-out refinance on a rental, which tops out around 75% LTV on most files with about 6 months of seasoning, is the usual alternative. On some programs, cash-out proceeds from another property can serve as the down payment source.

Conventional or DTI-based purchases treat the line differently. The new payment enters your personal DTI and can break it. That is the usual reason investors move to a DSCR loan. A true personal-use second home generally goes through a DTI-based path, not DSCR.

Sub-640 credit narrows the field. Profiles under 640 are limited to single-family homes with a clean 12-month housing history on the longer-runway structure. Because second homes floor at 640 and investment lines at 700, that restriction reaches primary residences only.

What the Investor Decision Looks Like in Practice

Picture an investor with a strong primary residence, a 720+ score, and no other liquid savings beyond a modest cushion. She wants a rental purchase at 75% LTV, so 25% down. She could source the down payment from a line on her home, as long as the purchase program accepts borrowed funds and she keeps real reserves in her account. If the rental clears 1.00 or better, she has a plausible path. If the rent only barely covers PITIA, the lender may adjust leverage or pricing. Each figure is subject to lender guidelines and a complete review of property type, leverage, and credit.

Now flip it. Say you own a paid-down rental, but it sits in an LLC. The line lender cannot take that title. The plan needs a vesting change or a cash-out refinance, and the sequence of events changes with it.

The most important mindset shift is that clearing 1.00 is not the same as positive cash flow. DSCR compares rent to PITIA only. Repairs, vacancy, management, utilities, and capital expenses all sit outside the calculation. A borrowed down payment adds a second payment to the same rent check, and the line’s pricing floats. When the draw period ends and repayment begins, the payment usually rises.

There is also collateral risk. Your primary home secures the line, so a problem at the rental can threaten the home. That is a real tradeoff, not a footnote.

Here is a short test before you draw:

1. Does the purchase program accept borrowed funds, and how much of the down payment can be borrowed?

2. After the draw, do you still hold reserves that did not come from the line?

3. Does the rental clear the coverage your program needs, with room left for repairs and vacancy?

4. Can you carry both payments if the property sits vacant for a stretch?

5. Is the home securing the line something you can afford to put at risk?

If any answer is no, a smaller line, a larger cash contribution, or a lower purchase price is usually the better move.

The strongest files clear both tests: enough equity and enough rental coverage. A bigger down payment lowers the monthly payment and can lift the DSCR. It never erases leverage caps, credit floors, reserve rules, or property eligibility. For the full picture of how these programs work together, the complete DSCR loans guide is the place to start.

Common Mistakes That Sink the Plan

• Drawing too late. A deposit that appears right before the purchase looks unexplained. Draw early enough that the money has a clear trail on your statements.
• Counting one pile twice. The same borrowed dollars cannot usually serve as both down payment and reserves.
• Assuming borrowing power equals equity. The line lender lets you borrow only a percentage of equity, and the cap depends on occupancy and credit.
• Opening the line on the new purchase. The collateral has to be a property you already own.
• Ignoring vesting. A property held in an LLC cannot secure the line.
• Treating coverage as profit. A clean ratio says the rent covers PITIA. It says nothing about what is left after repairs and vacancy.

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. Reach the team at 828-256-2183 or request a quote.

The investors who get the most out of borrowed equity are usually the ones who treat the line as a tool for one deal, with a plan for repaying it, rather than as a permanent second payment.

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.

References

1. CFPB – What is a HELOC

2. CFPB – HELOC booklet

3. White Coat Investor – HELOC on investment property