How Much Can You Borrow on an Investment Property HELOC to Buy a Real Estate Investment?

The Quick Read: Usually up to 70% combined loan-to-value on the rental that secures the line, minus every lien already on it, with a $500,000 ceiling and a 700 credit minimum on the wholesale network Lendmire brokers through, and that money typically covers only your down payment, because the purchase still needs its own separate DSCR loan.

• The cap is a formula: appraised value times the maximum combined loan-to-value, minus existing liens.
• Investment-property lines top out at 70% combined loan-to-value and $500,000 on this network. Primary-home lines can go higher.
• Lenders count the full credit limit toward the cap, not just the amount you draw.
• The line and the DSCR purchase loan are two approvals, and each one has to work on its own.
• Every figure here is subject to lender guidelines and full file review. None of it is a commitment to lend.

How the Maximum Line Is Calculated

Lenders follow the same three steps. Take the appraised value. Multiply it by the maximum combined loan-to-value (CLTV). Subtract every lien already on the property, including your first mortgage.

CLTV just adds all the loans against a property and divides by its value. The full line limit goes into that math, not only the portion you draw. That surprises people who plan to borrow a little now and more later.

Here is the math in percentages. Say your rental carries a first mortgage equal to 40% of its appraised value. The 70% investment cap leaves 30% of value for the line. If you want a cushion against a lower valuation, plan on a line smaller than that 30%, such as 25% of value.

Two other limits can bind before the formula does. The lender also looks at your credit and your debt-to-income ratio, and either one can shrink the line below what the equity math allows. Equity sets the ceiling. It does not guarantee you will get it.

What Caps Your Line on This Network

The network ceiling depends on which property secures the line. An investment property tops out at 70% CLTV, with a $500,000 maximum line and a 700 minimum credit score. A primary residence can reach 90% CLTV, but only for borrowers at 720 or better.

Two details on that table. On an investment property, a 720 score and a 700 score both reach 70%. Higher credit buys you nothing extra, and 700 is a hard floor.

Lines above $500,000 exist only on a primary residence. They require a full appraisal and a credit profile of 700 or better, and 720 if the borrower chooses the longer-runway structure (the 5-year draw with a 25-year repayment, described below).

Most investment lines sit at or under $500,000, so they ordinarily run on an automated valuation instead of a traditional appraisal. A borrower can still request a full appraisal.

A few more terms shape the line:

• Draw structure: Investment lines run a 5-year interest-only draw followed by a 25-year repayment period. Primary residences and second homes can also choose a 3-year draw with a 17-year repayment. This article calls the 5-year version the longer-runway structure.
• Day-one draw: At least 75% of the line is drawn at closing.
• Variable pricing: Pricing floats through both the draw and repayment periods and never converts to fixed. Some lenders elsewhere offer fixed-rate conversion, as the Consumer Financial Protection Bureau describes, but that is not how this network’s lines work.
• Debt-to-income: 50% maximum, qualified on the interest-only payment at the maximum draw.
• Title: The individual borrower or a revocable living trust must hold the property. LLCs cannot.
• Availability: These lines are offered only in Lendmire’s 16 full-service states, a narrower footprint than its DSCR lending.

Many borrowers expect to pull 80% or more against a rental. Not on this network. If you want an 80% purchase structure, that is a DSCR purchase loan, not a rental HELOC.

Which Property Should Secure the Line?

You have two real choices, and they produce different answers.

A line on a rental you already own is the true investment-property HELOC. It gets the tighter cap (70%) and the 700 credit floor. It can sit in first or second lien position. The upside is that your home stays out of it.

A line on your primary home gets the higher cap, up to 90% CLTV at 720 or better. A Texas primary residence is the exception. It is a homestead and caps at 80% combined. The tradeoff is that a missed payment now puts your house at risk, not just a rental.

Pick the property by asking two questions. First, which one has the equity you need? Second, which risk are you willing to carry? An investor with a paid-down home and a thinly equitied rental may lean toward the home. An investor with a heavily paid-down rental portfolio may prefer to keep the residence clear.

One more title trap. If your rental is already deeded to an LLC, the HELOC cannot attach to it as-is. You would need a vesting change first, or you would pull equity with a DSCR cash-out refinance instead. For the purchase itself, a DSCR loan can often close in an LLC, subject to lender program eligibility.

The Line Is Only the Down Payment

A HELOC is not purchase financing. It supplies cash for the down payment, and sometimes closing costs, while the new property still needs its own mortgage. For most investors that means a DSCR loan.

Treat these as two approvals. The line is underwritten on your equity, credit, and debt-to-income. The DSCR loan is underwritten mainly on the new property’s rent. Qualification there runs primarily on property-level rental income covering the payment, subject to lender guidelines.

DSCR (debt service coverage ratio) is monthly rent divided by the full monthly obligation: principal, interest, taxes, insurance, and any HOA dues. That total is called PITIA. For the new loan, typical wholesale-network ranges look like this:

• Leverage: Most purchase files land at 75%–80% LTV (20%–25% down). A select program reaches 85% LTV (15% down) with roughly a 700+ score.
• Coverage: 1.00 is where many select programs start. A separate select-lender path goes below 1.00, with leverage and terms adjusted.
• Credit: A 620 floor exists in parts of the network, most programs want around 660, and 700+ opens the strongest tiers.
• Reserves: These commonly run around 6 months of PITIA. They vary by lender, leverage, loan size, and transaction type.

A clean 1.00 coverage ratio does not mean the property makes money. Repairs, vacancy, management, utilities, and capital expenses all sit outside the calculation.

Your HELOC payment generally does not enter the DSCR ratio either. The ratio counts only the new loan’s payment. But the HELOC payment still gets paid out of your real cash flow, and that is the number that decides whether the deal holds up.

Then there is the borrowed-funds question, which trips up more investors than the cap itself. Lenders test three pots separately: the down payment, the closing costs, and the reserves. A program may accept a documented HELOC draw for the first two and exclude it from reserves. Across the network, some programs accept documented borrowed funds, some cap the borrowed share, and some want part of the down payment to be your own unborrowed cash.

A fully borrowed down payment can fail on that alone. No zero-down DSCR purchase exists.

Sizing a Line to a Specific Purchase

Work backward from the purchase. Run it in percentages first.

1. Pick the down payment tier. At 75% LTV you need 25% of the price. At 80% LTV you need 20%.

2. Add closing costs. These come on top of the down payment and are not part of the loan.

3. Add reserves. If the lender will not count borrowed money toward reserves, plan on holding about 6 months of PITIA in your own funds, outside the line.

4. Compare to the room under your cap. Your line has to cover steps one and two, and it has to fit inside the CLTV formula above.

Run the numbers on an investor whose rental carries a first mortgage equal to 40% of its value. The 70% cap leaves room for a line up to 30% of that property’s value. A purchase priced near the same value needs about 25% down at 75% LTV, plus closing costs. The room is enough on paper, but it is thin once costs are added and an automated valuation comes in a little low.

Fund the purchase at a lower leverage tier, or buy a cheaper property, and the line has much more breathing room. An 85% LTV purchase would leave a much smaller down payment to source, but that tier needs roughly a 700+ score and is available only through select programs.

Because at least 75% of the line is drawn at closing, interest accrues on most of it from day one. Size the line to the cash you will actually use, not the largest number the formula allows.

The Risks Nobody Puts in the Brochure

Interest-only draws feel cheap, and that is the trap. When the draw period ends, the line freezes and the balance moves into principal-plus-interest repayment. The CFPB’s HELOC explainer confirms the draw-then-repayment structure and notes that variable-rate payments can change from month to month. A line used for a down payment can see its payment jump when repayment begins.

Stacking is the second risk. The HELOC funds your down payment and the DSCR loan funds the rest, so you effectively carry debt against close to the full purchase price. The new rent has to carry both the new mortgage and the line. Stress-test that before you commit, using a lower rent and a higher payment than you expect.

The third is collateral. A line secured by your primary home puts the residence behind a rental purchase. The CFPB’s HELOC booklet describes borrowing against home equity and warns that failing to repay could cost you your home.

Finally, plan your exit. If you intend to refinance out of the line, remember that many DSCR loans carry prepayment penalties and that refinancing generally requires seasoning, with about 6 months the common expectation on a cash-out.

This is where the decision actually gets made. A HELOC is the right tool when you already hold the equity, the purchase is cheap enough to fit the cap, and the new property’s rent covers both payments with room to spare. If any of those fails, a DSCR purchase with a larger down payment from your own savings may be the cleaner route. The complete DSCR loans guide covers the purchase side in depth.

Key Terms Defined

HELOC: A home equity line of credit. It is a revolving line secured by a property, which you can draw up to a set limit.

CLTV: Combined loan-to-value. It is all loans against the property, including the full line limit, divided by its appraised value.

Lien: A lender’s legal claim on a property. A first mortgage is the first lien, and a HELOC can be a first or second lien.

Draw period: The stretch when you can borrow from the line, usually interest-only. Repayment begins when it ends.

DSCR: Debt service coverage ratio. It is a property’s monthly rent divided by its monthly PITIA.

PITIA: Principal, interest, taxes, insurance, and any association dues, which together make up the full monthly housing obligation.

This article is general information, not legal or tax advice. Consult a qualified professional, such as an attorney or CPA, about your own situation.

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.

About Lendmire

Lendmire (NMLS# 2371349) is a mortgage brokerage serving homeowners and real estate investors in its 16 full-service states. Home equity lines of credit are arranged through wholesale lending channels; Lendmire brokers the line and the lender underwrites each application under its occupancy-based guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. CFPB: What Is a Home Equity Line of Credit HELOC

2. CFPB HELOC brochure