How to Use a First-Lien HELOC for a Second-Home Down Payment

The Quick Read: A first-lien HELOC (home equity line of credit) can fund a second-home down payment when you open the line on a home you already own, draw and document the cash, and the purchase lender accepts borrowed funds as down payment, all while your combined loans stay inside the program’s leverage limit. Two lenders review two different files. The line is judged on you and your equity, and the purchase loan is judged on its own rules.

• You cannot open a line on a property you have not bought yet. The line must be open and funded before you go under contract.
• On a primary residence or second home, the ceiling reaches 90% combined loan-to-value only at a 720-or-better credit profile. On an investment property, the ceiling is 70%.
• The line’s payment sits outside a rental loan’s coverage ratio, but it still comes out of your real cash flow.
• Borrowed money never waives the purchase lender’s down payment, reserve, or credit rules.
• The home securing the line carries the risk, not the new property.

What Makes a HELOC “First-Lien”?

A lien is a lender’s legal claim on a property. The lender with the first claim gets paid first if the loan defaults. A first-lien HELOC sits in that first position. It is either the only loan on a home you own free and clear, or it replaces your mortgage and becomes the primary loan, as Bankrate explains. A traditional HELOC sits in second position, behind the mortgage.

The wholesale network Lendmire places files with offers a standalone line in either first or second position. Pricing floats during both the draw and repayment phases and never converts to fixed. Some first-lien lines add a sweep feature that links a checking account and applies each paycheck to the balance. That is a variation on the standard structure, not a requirement.

Key Terms Defined

CLTV (combined loan-to-value): All loans on a property, added together, divided by its value. A line on a home with no mortgage has a CLTV equal to the line divided by value.

Draw period: The early phase of a HELOC when you can borrow from the line. Payments are typically interest-only.

Repayment period: The later phase when the balance amortizes, meaning principal and interest are both paid down.

Source of funds: The paper trail showing where your down payment cash came from.

PITIA: Principal, interest, taxes, insurance, and association dues on a property. It is the payment a rental loan’s coverage test uses.

DSCR (debt service coverage ratio): Monthly rent divided by the property’s PITIA. A DSCR loan is reviewed primarily on property-level rental income covering the payment, subject to lender guidelines.

How Does the Strategy Work, Step by Step?

The order matters more than any single number. Reverse it and the plan can stall.

1. Talk to the purchase lender first. Each lender sets its own rules on borrowed funds. A short call before you draw saves you from raising cash the lender will not count.

2. Check the equity side. Confirm your credit profile, your equity, and the collateral home’s eligibility against the line’s limits (covered below).

3. Open the line. A HELOC borrows against a home you already own. It cannot buy a property for you.

4. Draw the cash. The network’s HELOC programs require at least 75% of the line to be drawn at closing. Size the line close to the cash you actually need.

5. Keep the paper trail. You will typically show the HELOC closing documents, the draw confirmation, and bank statements where the cash lands.

6. Apply for the purchase loan. For a true second home, that is typically a conventional or non-QM second-home loan. For a property you plan to rent, it is typically a DSCR loan.

7. Plan the payoff. Investors often plan to pay the line down from savings, rental income, or a later refinance. Write that plan down before you draw.

Plan on at least two sets of costs. Typical HELOC fees include an appraisal, an application fee, and closing costs, though some lenders waive some of them. Lines of $500,000 or less ordinarily run automated valuation instead of a traditional appraisal. A higher CLTV may call for a secondary valuation, and you can ask for a full appraisal in any case. Every line above $500,000 requires one.

Will the Purchase Lender Accept Borrowed Down Payment Money?

It depends on the lender, and across a wholesale network the answers fall into three camps. Some programs accept documented line proceeds. Some cap the borrowed share and want a slice from your own seasoned cash. Others require that slice to be fully unborrowed. Seasoned means the money has sat in your account for a set period before you use it.

Down payment, reserves, and closing costs are separate pots. A program may accept borrowed funds for one and not the others. Reserves are the cash you must hold after closing, commonly around six months of PITIA on DSCR files, though they vary by lender, leverage, and loan size. Borrowed funds are not reliably counted toward them.

The purchase lender also looks at total leverage. It wants combined debt across both properties to leave real equity in the deal. A big draw on a thinly equitied home can make a purchase file look stretched.

Here is the point many first-time investors miss. The line is judged on your credit, equity, existing liens, and debt load. The purchase loan is judged on its own rules. Passing one does not fix the other. If you can’t pass both, borrowed money won’t rescue the file.

What Limits Apply to the HELOC Itself?

The ceiling depends on what the collateral home is: a primary residence, a second home, or an investment property. Don’t assume the highest tier applies to you.

Tiers step down with credit. On a primary residence, a 700+ profile reaches 85% CLTV up to $500,000, or 75% CLTV up to $750,000. On a second home, 660 lands at 80% and 640 at 75%. Lines are $25,000 to $750,000, and a line above $500,000 is primary-residence only. It requires a credit profile of 700 or better (720 on the longer-runway structure), caps at 75% CLTV, and needs a full appraisal.

Draw structures vary too. On primary residences and second homes, you can choose a 3-year interest-only draw with a 17-year repayment, or a 5-year draw with a 25-year repayment. Investment lines run the 5-year draw and 25-year repayment only.

Other limits to know before you apply:

• Debt-to-income: 50% maximum, or 45% for credit profiles from 600 to 679. A ratio above 45% requires a 680 minimum. The line is qualified on the interest-only payment calculated on the maximum draw.
• Credit: a single-bureau score keyed to the primary wage earner. The report can be no more than 90 days old at closing.
• Past credit events: a bankruptcy needs 4 years of seasoning from discharge or dismissal.
• Title: the home must be held by you as an individual or in a revocable living trust. LLCs, corporations, partnerships, and irrevocable, blind, or land trusts cannot hold title. That is the sharpest difference from a DSCR loan, where LLC vesting is common, subject to program terms. A home already deeded to an LLC needs a vesting change first.
• Exposure: three lines per borrower, and no more than 15 financed properties.
• Property types: single-family, 2-4 units, PUDs, townhomes, and condos, including non-warrantable condos. Manufactured homes, co-ops, condotels, and log homes are not offered.

One more fact matters here. Lendmire’s HELOC placements are limited to its 16 full-service states. That is narrower than its 41-market DSCR footprint, which includes Washington, D.C. Confirm eligibility before you plan around a line.

Does the HELOC Payment Count Against the New Property’s Coverage?

Normally no, and that surprises people. A DSCR compares the subject property’s rent to that property’s own payment. A line secured on a different home sits outside the ratio.

Outside the ratio does not mean free. The payment still comes out of the same rent. A rental that clears roughly 1.2x on paper can feel thin once a variable-rate line payment is added. DSCR is also not the same as positive cash flow. Repairs, vacancy, management, utilities, and capital expenses all sit outside it. Model both obligations together before you commit.

Now the leverage side. On a rental purchase, most DSCR files land at 75% to 80% LTV. Select high-leverage programs reach 85% with roughly a 700+ score. Credit floors vary: a 620 exists in parts of the network, most programs want around 660, and 700+ opens the strongest tiers. Coverage of 1.00 is where many select programs start. A separate select-lender path takes coverage below 1.00, with leverage and terms adjusted. A larger down payment can lift the ratio. It never erases leverage caps, credit floors, or reserve rules.

If the property is a true owner-occupied second home, the purchase lender typically underwrites you instead of the rent. In that case, a HELOC payment would likely count in your debt-to-income ratio. Ask the lender to confirm before you draw.

Where Do the Rules Break?

These are the edge cases that derail otherwise solid plans.

Line freezes. HELOCs generally let the lender freeze or reduce a line if the home’s value falls. A freeze before closing can strand a planned draw. The CFPB’s HELOC booklet warns about this.

Renting out the collateral home. The same booklet notes that renting your home to others may be prohibited under the line’s terms. If you plan to move out and rent the old home later, check the line’s occupancy language first. Investment-property collateral also has its own tier and a 700 credit minimum.

Replacing your mortgage. A first-lien line that replaces your mortgage changes the whole payment structure. You give up a fixed-rate first mortgage for a variable line. That is a bigger decision than adding a second-position line, and for many homeowners the second-position line is the better fit.

Rate mismatch. The line is variable. The DSCR loan on the new property can be fixed, with a 30-year fixed as the spine of the product and 40-year or interest-only terms available through select lenders. You can end up holding both kinds of risk at once.

The home is at stake. The CFPB states that if you fall behind, you could lose your home. SmartAsset makes the same point about foreclosure. The rental is not the collateral. Your home is.

Tax. 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.

Should You Do It? Who Fits and Who Should Skip

A first-lien line fits best when you own a home free and clear and have substantial equity. You have a plan to repay the line, and your purchase lender has told you borrowed funds are acceptable.

If you still carry a mortgage you want to keep, a second-position line is usually the cleaner structure. If you own an eligible rental with equity, a DSCR cash-out refinance is another path. Cash-out refinances top out around 75% LTV across most of the network, with about six months of seasoning as the common expectation. If family is helping instead, Lendmire’s piece How to Use Gift Funds for a Second-Home Down Payment on Bank Statements covers that route.

Skip the strategy if any of these are true:

• Your purchase lender will not count borrowed funds and you cannot cover the minimum from your own cash.
• The new property only clears coverage with little room to spare.
• A payment increase on a variable line would strain your household budget.
• Your collateral home is held in an LLC and a vesting change is not practical.

Ask the lender these questions before you draw:

• Does the program accept line proceeds for the down payment, reserves, or closing costs?
• Is there a cap on the borrowed share?
• Do you need seasoned, unborrowed funds?
• How is the line’s payment treated in my file?

The strongest files clear both tests: enough equity and enough rental coverage. For the bigger picture on how these loans fit together, read the complete DSCR loans guide.

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 broker arranging financing through select lenders in its wholesale network, and every figure is subject to lender guidelines and full file review.

About Lendmire

Lendmire is a mortgage brokerage (NMLS# 2371349) arranging home equity lines of credit — primary-residence, second-home and investment-property lines — through a wholesale lending network in its 16 full-service states. Eligibility is determined by the lender on each file. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. Bankrate – First-lien HELOC

2. CFPB – What You Should Know About Home Equity Lines of Credit

3. CFPB – What is a home equity line of credit (HELOC)?

4. SmartAsset – Using a HELOC for a down payment