The Quick Read: A HELOC covers whatever your old home’s equity allows, up to the line limit, but the purchase lender decides how much of that borrowed cash counts as your down payment, and on a DSCR purchase the line still has to leave room for closing costs and reserves.
- The line is sized from your current home: its value, times the lender’s combined loan-to-value cap, minus what you already owe.
- Most DSCR purchases land at 75%-80% LTV (20%-25% down), so that is the number your line needs to beat.
- Open the line before the old home is listed. Several states bar lines on listed homes.
- A HELOC supplies cash, not credit. It never waives credit floors, reserves, or property rules.
- A rental that clears 1.00 coverage is not automatically cash-flow positive, and the HELOC payment sits outside that math. Every figure here varies by lender and program — guidelines, property type, leverage, and credit profile all apply.
Key Terms Defined
HELOC is a home equity line of credit. It is a revolving credit line secured by a home you already own.
Equity is your home’s value minus everything you owe against it.
CLTV is combined loan-to-value. It adds every loan on the home, first mortgage plus the line, and divides by the home’s value.
DSCR is debt service coverage ratio. It divides a rental’s monthly rent by the full monthly obligation on the loan: principal, interest, taxes, insurance, and any HOA dues.
PITIA is that monthly obligation spelled out: principal, interest, taxes, insurance, and association dues.
Draw period is the stretch when you can borrow from the line and typically pay interest only.
Source of funds is the paper trail showing where your down payment came from.
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.
What Is the Formula for How Much a HELOC Can Cover?
The HELOC covers the smaller of two ceilings: the line your equity supports, and the amount the purchase lender will accept as down payment. Equity sets the first ceiling. Lender policy sets the second.
Start with the line. Take your home’s value, multiply by the CLTV cap your credit tier allows, and subtract your existing mortgage balance. Nasdaq makes the same point: the amount of equity limits what a HELOC can provide.
On Lendmire’s wholesale network, the cap depends on occupancy and credit. These are lines on a primary residence, up to $500,000:
| Credit tier | Max CLTV | Line as % of value (if you owe 50%) |
|---|---|---|
| 720+ | 90% | 40% |
| 700+ | 85% | 35% |
| 660+ | 85% | 35% |
| 640+ | 80% | 30% |
| 620+ | 70% | 20% |
The 90% tier exists only at 720 or better. A 620 score tops out at 70% CLTV, so a borrower who owes 70% of value on the first mortgage has no line to draw. These caps are typical guidance and are subject to lender guidelines and a full file review.
Then compare the line to the cash the purchase needs. A DSCR purchase typically takes 20%-25% down, plus closing costs, plus reserves commonly around six months of PITIA. Select high-leverage programs reach 85% LTV (15% down) with roughly a 700 score or better.
How Does Underwriting Treat the Line, Step by Step?
The HELOC is underwritten to you, and the DSCR loan is underwritten to the property. Those are two separate approvals with two separate sets of rules. Passing one does not carry the other.
1. Equity check. The lender confirms value and liens on the home you own. Lines at or below $500,000 ordinarily use an automated valuation, with no traditional appraisal. A full appraisal is required on every line above $500,000, and you can request one in any case.
2. Borrower underwriting. The HELOC lender reviews credit and debt-to-income (DTI). Maximum DTI is 50% on this network, and 45% for scores from 600 to 679. The lender reviews your file on the interest-only payment calculated on the maximum draw, not on what you plan to draw.
3. Draw and park the cash. Keep the closing documents, the draw confirmation, and the statement showing where the money landed.
4. Purchase lender traces the funds. Across Lendmire’s wholesale network, lenders tend to fall into three camps. Some accept documented line proceeds as the down payment. Some cap the borrowed share. Some want a slice of your own unborrowed, seasoned cash in the deal.
5. DSCR underwriting. The lender reads the new rental’s rent against its payment. A bigger down payment, borrowed or not, lowers that payment and can lift the ratio.
6. Exit. If you sell the old home, the line is repaid from that closing. If you keep it, the line stays open and keeps being paid.
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. That difference ends at the purchase, though. The HELOC on your old home is a personal loan with personal underwriting.
What Does It Look Like in Percentages?
Picture a primary residence with a 700+ credit profile and a first mortgage equal to 50% of the home’s value. The 85% CLTV tier leaves a line of 35% of the home’s value. Now say you buy a rental priced about the same as the old home.
A 25% down payment on that rental uses about 25% of the old home’s value from the line. That leaves roughly 10% of the old home’s value for closing costs and the cushion you will want. The same borrower buying at 20% down has even more room. Final terms depend on lender guidelines, property type, leverage, and the borrower’s complete credit picture.
Now change one input. If the first mortgage equals 70% of value, the line shrinks to 15% of value. That cannot fund a 20%-25% down payment on a similarly priced rental. You would need savings, a cheaper property, or a different plan. These specifics are subject to lender guidelines and a full review of property, leverage, and credit.
Run the second test too. The new rental has to carry its own payment, so a coverage ratio around 1.2x is a stronger file than one sitting at the floor. DSCR is not the same as cash flow. Repairs, vacancy, management, utilities, and capex all sit outside the calculation. Plenty of 1.00-coverage rentals still lose money in a bad month.
On coverage: 1.00 is where many select programs start. A separate select-lender path takes coverage below 1.00, with leverage and terms adjusted. No-ratio structures exist only through select lenders, generally for borrowers who already own a primary residence.
What Structures Exist for the Line Itself?
Lendmire’s wholesale network offers a standalone line in first or second lien position, with two draw structures on primary residences and second homes. One runs a 3-year interest-only draw followed by a 17-year amortizing repayment. The other runs a 5-year draw followed by a 25-year repayment. The CFPB describes the general pattern: you borrow repeatedly up to your limit during the draw period, and a 10-year draw is one example.
Four details matter for a buy-before-sell plan:
- Most of the line is drawn at closing. At least 75% of the line must be funded on both structures. Do not open a large line just to hold spare capacity. Size it to the down payment, closing costs, and a modest cushion.
- Line size runs $25,000 to $750,000. Michigan’s floor is $10,000. Anything above $500,000 is for primary residences only, needs a 700 score or better (720 on the 5-year draw structure), caps at 75% CLTV, and requires a full appraisal.
- The line floats. Pricing floats through both the draw and repayment periods and never converts to fixed. Plan for the repayment phase, when the payment steps up. Lendmire’s piece How Much a HELOC Payment Jumps When the Draw Period Ends walks through that step.
- Exposure is limited. A borrower can hold three lines, and a borrower with more than 15 financed properties is not eligible.
Availability is narrower than the DSCR side. Lendmire arranges DSCR financing across 41 markets, including Washington, D.C., but its home equity line placements run through 16 full-service states.
Can You Use a Line on a Rental Instead?
Sometimes, but expect less room. NerdWallet says an investment-property HELOC comes from a smaller lender pool with lower borrowing limits, because lenders see rentals as higher default risk.
On Lendmire’s network, an investment property line caps at 70% CLTV, needs a 700 minimum credit profile, tops out at $500,000, and runs the 5-year draw structure only. There is no tier above 70% for investment collateral. A rental you bought recently usually has little equity room anyway, and many lenders look for seasoning before they treat a balance as settled.
The better pattern for an investor who already owns rentals with real equity is often a DSCR cash-out refinance. That is a different loan with its own rules. It tops out around 75% LTV across most of the network, with about six months of seasoning as the common expectation. For short-term rentals the cash-out ceiling is 70%.
Where Does the General Rule Break?
The rule that a HELOC converts equity into a down payment breaks in several predictable places. Most surprise first-time users. Each one is worth checking before you apply.
The old home is already listed. A property listed for sale, or listed within the past 60 days, is ineligible for a line in Indiana, North Carolina, Pennsylvania, Tennessee, Texas, and Washington. Lenders may still write the line, but many restrict it. The practical advice is to open the line before you list.
The title sits in an LLC. On this network, a HELOC borrower must hold title individually or in a revocable living trust. LLCs, corporations, partnerships, and irrevocable, blind, or land trusts cannot hold title. A property already deeded to an LLC needs a vesting change or a DSCR cash-out instead. DSCR purchase loans can go to LLC borrowers, subject to lender program eligibility.
The down payment is 100% borrowed. Stricter programs may reject this on its own. They want some of your own capital in the deal. A line funded against a different property and documented cleanly is commonly accepted. A second lien placed against the new property at closing is the structure most lenders refuse.
Reserves compete with the down payment. Line proceeds often cannot fill both. Undrawn credit generally does not count as reserves. Reserve rules vary by lender, leverage, loan size, and transaction type. Around six months of PITIA is common, and conservative rate-and-term files at modest leverage under $1,500,000 can see reserves waived. Loans above that size typically step up to about nine months.
The lender freezes or trims the line. Line agreements commonly let the lender freeze or reduce the line if the home’s value falls or your finances worsen. That risk is real between the draw and the closing. Draw before you need the cash.
You plan to rent out the old home. The CFPB’s HELOC booklet cautions that renting out your home may be prohibited under the terms of your line. It also notes that repayment is often required when you sell. Read the line agreement before you build the keep-it-as-a-rental plan.
Texas primary residences carry a lower cap. A Texas primary is a homestead and caps at 80% CLTV, so the higher tiers in the table never apply there. Texas second homes and investment properties follow the standard tables.
The old property is an ineligible type. The network does not offer lines on manufactured homes, co-ops, condotels, log homes, commercial, mixed-use, or agricultural-zoned properties. Modular factory-built homes are eligible on one of the two structures only. On the DSCR side, manufactured homes (single- and double-wide), log homes, and barndominiums are not offered.
What If the Line Covers Only Part of the Down Payment?
A partial cover is the most common outcome, and it is fine. Combine the line with savings. Lower the target price. Choose a program that allows less down, such as a select high-leverage purchase at 85% LTV with a score near 700 or better. Or wait until the old home sells and close on the rental with proceeds. Terms depend on the lender’s guidelines, the property type, the leverage, and a full review of the credit profile.
Avoid stretching the line to its maximum to close the gap. Remember that the lender reviews your file on the interest-only payment at the maximum draw, so a bigger line can push your DTI against the 50% ceiling. It can also strain the DSCR side of the file, because borrowed down payment is still your debt.
What Does the Decision Look Like in Practice?
A buy-before-sell move works when three things are true. The old home has enough equity to fund the down payment and a cushion. The new rental clears coverage with room to spare. You can carry both payments if the old home sits unsold.
Run those three tests in order. First, build the line math with your CLTV tier. Second, size the DSCR purchase at 75%-80% LTV and confirm the rent covers the payment at the ratio your program wants. Higher coverage opens better leverage and terms. Third, stress the overlap: the old mortgage, the HELOC payment, and the new rental’s expenses, with zero rent from the new unit for a stretch. The exact numbers vary by lender and program and follow a full review of property, leverage, and credit.
When the line is HELOC-funded, you are effectively financed near 100% across the two properties. That is a legitimate strategy, but it raises risk. The line payment comes out of your pocket even though it never appears in the DSCR ratio.
For the exit, selling the old home repays the line from proceeds. Remember that the payoff shrinks the proceeds you may have counted on elsewhere, so do not spend the same equity twice. If you keep the old home as a rental, a DSCR cash-out later can repay the line. Check the new loan’s prepayment terms first, since many DSCR loans carry a prepayment penalty.
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 the other side of this choice, Lendmire’s piece HELOC Down Payment vs Cash Purchase When You Have a Low First Mortgage covers when the line is the weaker tool. For program mechanics beyond this topic, the complete DSCR loans guide covers leverage, credit, and coverage in one place.
Frequently Asked Questions
Can a HELOC cover the whole down payment on a rental?
Sometimes, but treat it as a case-by-case answer. Some lenders in the network accept documented line proceeds in full, some cap the borrowed share, and some want unborrowed, seasoned cash in the deal. A line never waives credit floors, reserves, or property eligibility, and it can’t fund the full purchase price.
Does the HELOC payment count against my DSCR?
No. The DSCR compares the rental’s rent to the new loan’s PITIA only. The HELOC payment still matters in two ways. The line is underwritten to you on DTI, and the payment comes out of your pocket whether or not the rental is vacant.
How much of the line do I have to draw?
On this network, at least 75% of the line is drawn at closing. A $25,000 minimum line applies, and later draws carry a minimum of $1,000 (Texas is $4,000) on the program that states it. Size the line close to what you need.
Can I open the line after I list the old home?
Often not. Lines on listed homes are restricted by many lenders, and a property listed for sale or within the past 60 days is ineligible in several states on this network. Open the line before you list.
What credit score do I need?
For the HELOC, the network’s floor is 600 on primary residences, 640 on second homes, and 700 on investment properties, with the highest CLTV tiers at 720 or better. For the DSCR purchase, a 620 floor exists in parts of the network, most programs want around 660, and 700+ unlocks the strongest leverage tiers. All figures are subject to lender guidelines.
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. Programs change, and every file is underwritten individually by the lender. This is not a commitment to lend.
The investors who use this move well treat the line as a bridge with a defined exit, not as permanent leverage on the old home.
About Lendmire
Lendmire (NMLS# 2371349) is a mortgage broker. Home equity lines of credit — on a primary residence, a second home or an investment property — are arranged through wholesale lenders in Lendmire’s 16 full-service states, and every line is underwritten by the lender under its program guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
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References
1. Nasdaq – How to Use a HELOC for a Down Payment
3. NerdWallet – HELOC on investment property
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: Best HELOC to Buy Investment Property · How Much Equity Do You Need Built Up to Start Investing in Homes? · Advantages of Using a HELOC or Home Equity Loan to Buy Investment Property
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Disclosure information. Lendmire is a state-licensed mortgage brokerage under NMLS# 2371349. Lendmire is not a depository institution, direct lender, or financial advisor — all loans referenced are placed through wholesale lender partners and are subject to each lender's underwriting standards. This article is provided for general informational purposes and is not a commitment to lend, nor does it constitute financial, legal, or tax advice. Loan programs, terms, rates, and qualification standards change without notice and depend on borrower profile, property type, and the state in which the subject property is located. Equal Housing Opportunity provider. NMLS Consumer Access: nmlsconsumeraccess.org.