The Quick Read: You open a home equity line on the property you already own, draw cash into your own account, use it toward the down payment on the next property, and repay the line from sale proceeds, which works only if the line is in place before you list and the purchase lender accepts borrowed funds. Every step has its own approval, so the order matters.
- Open the line before you list the old home and before you go under contract on the new one.
- Ask the purchase lender, before you draw, whether borrowed funds count as down payment.
- Size the line to the need, because most of it is drawn at closing and starts costing you immediately.
- Plan for three obligations at once: the old mortgage, the HELOC, and the new loan.
Why Would You Use a HELOC Before Your Home Sells?
You use one to turn equity into cash without selling first. That lets you buy the next property while the old one is still on the market, or before it is listed at all.
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 strongest reason is timing. A buyer who needs the old home’s sale proceeds must wait for that sale. A buyer with HELOC cash can move when the right property appears. Benzinga’s explainer on HELOC down payments notes this also lets you make an offer that does not depend on selling your current home first.
The second reason is leverage on the new loan. A larger down payment lowers the new loan balance, and for an investment property it can lift the DSCR. DSCR, or debt service coverage ratio, is monthly rent divided by the property’s full monthly obligation: principal, interest, taxes, insurance, and any HOA dues. Many investors find it easier to clear that test with more cash in the deal.
There is a cost. If the HELOC funds the entire down payment, you are financing close to the full purchase price across two loans. You hold little equity in the new property on day one, so the deal has to work without a cushion.
Many investors skip a step here. They treat the HELOC as the plan, when it only supplies cash. The purchase is a separate approval with its own limits on leverage, credit, reserves, and property type.
Key Terms Defined
HELOC: A home equity line of credit is a revolving line secured by a property you own. You borrow against the equity, repay, and can borrow again during the draw period.
Equity: The home’s value minus what you owe on it.
CLTV: Combined loan-to-value is all loans on the property, first mortgage plus the HELOC, divided by the home’s value.
Draw period: The stretch when you can borrow from the line, usually paying interest only, before full repayment begins.
DSCR loan: An investor loan that qualifies primarily on property-level rental income covering the payment, subject to lender guidelines.
PITIA: Principal, interest, taxes, insurance, and association dues. This is the payment the rent has to cover in a DSCR calculation.
DTI: Debt-to-income is your monthly debt payments divided by your monthly income. A HELOC underwrites on this, and a DSCR loan generally does not.
Source of funds: The paper trail showing where your down payment came from.
Non-contingent offer: An offer with no clause making the purchase depend on selling your current home.
The Sequence, Step by Step
The order is: open the line, confirm the purchase lender’s view, draw, document, close, then repay at sale. Skipping the second step is the costly mistake.
1. Open the line on the property you already own. This is borrower-level underwriting. The lender looks at your credit, your equity, existing liens, and your debt load. The CFPB explains that your home secures the line, so missed payments put the home at risk. That is the real price of the cash.
2. Do it before you list. NerdWallet’s guide to buying before you sell says a lender generally won’t approve a new HELOC once the home is on the market. Across the network, some states go further. A property listed for sale, or listed within the past 60 days, is ineligible for a home equity line there.
3. Ask the purchase lender before you draw. Whether borrowed funds count as a down payment is each lender’s call. No single rule decides it. On DSCR files, treatment varies by lender and program. A short question up front can save a failed closing.
4. Draw, move the cash, and keep the records. Pull the funds into your own account and save the HELOC agreement, the draw confirmation, and the statements showing the money arrive. Lenders review large deposits, and one BiggerPockets thread describes an investor whose lender wanted the source documented. Disclose it. Do not try to blend it into savings.
5. Close the purchase. The new loan is its own file. It has to meet its own leverage, credit, reserve, and property rules, which the next sections cover.
6. Repay the line when the old home sells. Per the CFPB’s HELOC booklet, repayment is often required when you sell the home. The payoff comes out of sale proceeds at the closing table. Until then, you carry every payment.
How Does the New Lender See HELOC Cash?
On a DSCR purchase, the lender cares most about whether the rent covers the new property’s payment. The HELOC sits on your old home, so its payment is not part of the new property’s PITIA. DSCR compares rent to PITIA only.
DSCR loans are designed for non-owner-occupied investment properties. Because they are business-purpose investor loans, they are reviewed differently from a standard owner-occupied mortgage.
Here is what the network typically asks of the new purchase, subject to lender guidelines:
- Leverage on an investment-property purchase: most files land at 75%-80% LTV, which means 20%-25% down. Select programs reach 85% LTV (15% down) with roughly a 700+ credit score.
- Coverage: 1.00 is where many select programs start. A separate select-lender path goes below 1.00, with leverage and terms adjusted. Stronger ratios open better pricing and leverage.
- Credit: a 620 floor exists in parts of the network, most programs want around 660, and 700+ opens the strongest tiers.
- Reserves: these vary by lender, leverage, loan size, and transaction type. About 6 months of PITIA is common. Larger loans typically step up.
The strongest files clear both tests: enough equity and enough rental coverage.
Clearing 1.00 also does not mean the property cash flows. Repairs, vacancy, management, utilities, and capital expenses all sit outside the calculation. Your HELOC payment comes out of your pocket whatever the ratio shows.
For the full picture of how these loans work, see the complete DSCR loans guide. Lendmire is a broker that arranges DSCR investor loans across 41 markets, including Washington, D.C., through select lenders in its wholesale network. It does not lend directly.
One structure to know: the new purchase can be vested in an LLC, subject to lender program eligibility. The HELOC cannot. The property under the line must be titled to you personally or to a revocable living trust.
How Big Can the Line Be?
The line is limited by equity, credit, and occupancy. Occupancy matters most, because the ceiling differs sharply by how the old property is used.
The math is a subtraction. Take the combined-loan limit as a percentage of value, then subtract your current mortgage balance as a percentage of value. Say your credit profile is 720 or better, and you live in the home. The ceiling on a primary residence reaches 90% CLTV on lines up to $500,000. If your mortgage balance is 55% of value, the room is up to 35% of value, capped by the line limit.
Here is how the occupancy tiers differ across the network’s home equity lines, subject to lender guidelines:
| Old property | Top CLTV | Credit needed |
|---|---|---|
| Primary residence | 90% | 720 or better |
| Primary residence, lower tier | 75%-85% | 660 to 700+ |
| Second home | Up to 90% | 720 or better |
| Investment property | 70% | Stricter minimums |
The 90% figure exists only at a 720-or-better profile on lines up to $500,000. Lines run from $25,000 up to $750,000. A line above $500,000 is primary-residence only, caps at 75% CLTV, and requires a full appraisal. Investment-property lines never exceed 70% CLTV.
Two features affect sizing. At least 75% of the line is drawn at closing. Pricing floats during both the draw and repayment periods and never converts to fixed. Oversizing the line therefore means paying on money you did not need.
The draw structures are a 3-year interest-only draw followed by a 17-year repayment, or a 5-year draw followed by a 25-year repayment. Investment lines use the 5-year structure only. Your DTI is qualified on the interest-only payment at the maximum draw, up to 50%, or 45% for credit profiles from 600 to 679.
Lendmire’s home equity lines run in its 16 full-service states, which is narrower than its DSCR footprint.
Where the Rule Breaks
The general rule is that borrowed down payments work if disclosed and approved. These edge cases are where it fails.
A lender bars it. A BiggerPockets thread describes a bank saying its rules forbid HELOC funds for an investment purchase. Big banks and large retail lenders tend to be the strictest. Wholesale DSCR lenders vary, which is why you ask before you draw.
The line gets frozen or reduced. Lenders can generally freeze or cut a line if the home’s value falls or your finances worsen, as the CFPB booklet notes. A frozen line mid-purchase can break your closing.
You plan to rent out the old home. The same booklet says a line’s terms may prohibit renting the home. Read the agreement before you assume the old home can become a rental.
The old home is already deeded to an LLC. A HELOC cannot be placed on it. You would need a vesting change, or a DSCR cash-out refinance instead.
The old property is a rental. Investment lines top out at 70% CLTV, so there is less cash to draw than on a primary residence.
The old home is listed. Some states in the network treat a listed property as ineligible, so the timing in step 2 is firm.
You hold many lines or properties. A borrower is limited to three lines. Anyone with more than 15 financed properties is not eligible.
The new property is the wrong type. The network’s DSCR programs do not offer manufactured homes (single- and double-wide), log homes, or barndominiums. Condos, including non-warrantable ones, and 2-4 unit properties are eligible.
What Does the Overlap Cost?
You carry three obligations until the old home sells. The longer the overlap, the more the HELOC and the second mortgage cost you.
| Scenario | Old mortgage | HELOC | New loan |
|---|---|---|---|
| Old home sells soon | Short overlap | Paid at closing | Rent starts |
| Old home sits | Continues | Interest accrues | Rent may offset |
| Old home does not sell | Continues | Draw period may end | Strain builds |
If the new property is a rental, its rent covers some of the third obligation. A new home you will live in offers no such offset.
Run the stress test before you draw. Ask what happens if the sale takes twice as long. Ask what happens if the price drops. Ask whether your reserves cover the line’s interest-only phase, and what you do if the draw period ends. Exit options include cutting the price, renting the old home (only if the line’s terms allow it), or refinancing. All of them take time.
Compare the Alternatives
A HELOC is one tool among several. Which fits depends on whether you want a payment, collateral risk, or a cheaper lump sum.
| Option | Payment | Fit with a later sale |
|---|---|---|
| HELOC | Interest-only draw, then amortizing | Paid from proceeds |
| Bridge loan | Short-term, often lump-sum | Built for it |
| Home equity investment | None monthly | Share of future value |
| Cash-out refinance | New mortgage on old home | Replaces existing loan |
NerdWallet’s guide covers the bridge loan option. A home equity investment gives up part of the home’s future value. Benzinga notes you could owe far more at the end of the term.
Is This Right for You?
It fits if you have real equity, steady income to carry the overlap, a credit profile that clears the line’s tier, and a purchase lender that has confirmed borrowed funds are acceptable. It does not fit if the numbers only work with the HELOC covering the whole down payment and no reserves behind it.
Common mistakes to avoid:
- Waiting until after the home is listed.
- Drawing before the purchase lender has approved the source.
- Under-sizing the line and forgetting closing costs.
- Assuming the old home will sell by a certain date.
- Ignoring that a HELOC and the new loan stack on top of the old mortgage.
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.
For related reading, see Lendmire’s piece Can You Use a Primary Home HELOC as a Rental Down Payment?. For a rental already under a line, see Lendmire’s piece Can You Use a Rental HELOC as a Down Payment on Another Property?.
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.
Frequently Asked Questions
Can I open a HELOC after my home is listed?
Generally no. Lenders typically won’t approve a new line once the home is on the market. Some states in the network treat a property listed for sale, or listed within the past 60 days, as ineligible. Open the line first.
Will a DSCR lender count HELOC cash as my down payment?
It depends on the lender and program. Across the network, treatment of borrowed funds varies. Ask before you draw, and be ready to show the HELOC agreement, the draw confirmation, and the statements showing the cash arriving.
Does the HELOC payment lower my DSCR?
No. DSCR compares the new property’s rent to that property’s PITIA only. Your HELOC payment is outside that ratio, but it still comes out of your own cash, and the lender reviews your reserves separately.
What if my old home doesn’t sell?
You keep paying the old mortgage, the HELOC, and the new loan. Options include a price cut, renting the home if the line’s terms permit it, or a refinance. Stress-test an extended overlap before you draw.
Can I take a HELOC on a rental property instead?
Yes, but the ceiling is lower. Investment lines top out at 70% CLTV, run only on the 5-year draw and 25-year repayment structure, and require individual or revocable-trust title. The property cannot be held in an LLC.
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.
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References
1. Benzinga: Using a HELOC for a Down Payment
2. CFPB: What is a home equity line of credit (HELOC)?
3. NerdWallet: How to Buy a Home Before Selling Your Current One
4. BiggerPockets: Using a HELOC to Buy an Investment Property
5. CFPB: What You Should Know About Home Equity Lines of Credit
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: How to Bridge to the Next Home With a HELOC Before Yours Sells · Can I Use HELOC For Down Payment On Investment Property · How to Buy Before Selling Using a HELOC on a Sub-4% Mortgage
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Legal disclosures. Lendmire (NMLS# 2371349) is a state-licensed mortgage brokerage that arranges financing through wholesale lender relationships. Lendmire is not a direct lender, depository institution, or registered financial advisor. The discussion above is general informational content about real estate financing — it is not financial, legal, or tax advice, and readers should consult licensed professionals for guidance on their individual circumstances. Loan inquiries are subject to lender underwriting; this article does not represent a commitment to lend. Loan terms, rates, and qualification standards vary by borrower, property, and state, and are subject to change at any time. Equal Housing Opportunity. NMLS Consumer Access: nmlsconsumeraccess.org.