How Much Can You Borrow on an Investment Property HELOC for the Next Down Payment?

The Quick Read: On an investment property, the line tops out at 70% combined loan-to-value (CLTV) on the wholesale network Lendmire works with, minus what you already owe on the property, and never above $500,000, with a minimum 700 credit score and subject to lender guidelines. The line only supplies cash. The loan on your next property sets its own rules.

• Your first mortgage comes out of the math before you see a dollar of line.
• Investment lines are held in your own name or a living trust, not an LLC.
• A line on your primary home can reach 90% CLTV, but only at a 720-or-better credit profile.
• Your next purchase still needs its own down payment, reserves, and rental coverage.

How Is the Maximum Line Calculated?

The formula has three steps. Multiply the property’s value by the lender’s CLTV ceiling. Subtract every loan already secured by the property. What remains is the most the line can be.

Run it in percentages. Say a rental is worth 100% of its appraised value and the first mortgage sits at 50% of that value. The 70% ceiling leaves a maximum line of 20% of the property’s value. Equity of 50% does not mean a line of 50%. The ceiling leaves a 30% cushion that you cannot borrow against.

Investors often look at their equity, assume the line matches it, and plan a purchase around a number the lender never offers.

Two other limits apply on this network. Investment lines run from $25,000 up to $500,000. A line above $500,000 is open only to primary residences, and those need a full appraisal and cap at 75% CLTV.

What Does Market Data Say About These Limits?

NerdWallet reports that a maximum of 80% loan-to-value is possible on an investment-property HELOC across the broader market, with many lenders sitting below 70%. It reports 90% for a primary home. It also says the lender pool for rental lines is smaller and the standards are stricter.

The 90% figure applies only to primary residences and second homes, and only at a credit profile of 720 or better.

How Much Down Payment Can the Line Support?

Work backward from the purchase. Take a rental worth 100% of value with a first mortgage at 50%. It supports a line of 20% of its value. That sets how large a purchase the line can fund.

Read it this way: at 25% down, a line equal to 20% of your rental’s value funds a purchase priced at 80% of that value. This ignores closing costs and reserves, which need their own cash. Each figure is subject to lender guidelines and a complete review of property type, leverage, and credit.

Purchase leverage helps here. Select programs reach 85% LTV, or 15% down, usually with a score near 700 or higher. A smaller down payment means a smaller line does the job.

Why Is a Rental Line Smaller Than a Home Line?

The same equity buys a smaller line on a rental. Here is the network ladder.

The cash-out row is a different product. It replaces your current loan instead of adding a second one. It also tests the rent against the new payment instead of testing you.

What Does a Lender Check Before Approving a Line?

A HELOC is underwritten on you, with the property as collateral. Across the network, these are the main tests for an investment line, always subject to lender guidelines and full file review:

• Credit: 700 minimum on an investment property. Both the 720 and 700 tiers reach the same 70% CLTV, so a higher score buys eligibility, not leverage.
• Debt-to-income (DTI): 50% maximum, and a ratio above 45% requires a 680 score. The lender reviews your file on the interest-only payment calculated on the maximum draw, not on what you actually borrow.
• Valuation: Lines at or below $500,000 usually run an automated valuation with no traditional appraisal. A higher CLTV can trigger a secondary valuation, and you can request a full appraisal at any time.
• Title: The property must sit in your own name or in a revocable living trust. LLCs, corporations, partnerships, and land trusts cannot hold title. A rental already deeded to an LLC needs a vesting change, or a DSCR cash-out instead.
• Portfolio limits: You are limited to three lines at once. A borrower with more than 15 financed properties is not eligible.
• Property type: Single-family, 2-4 units, PUDs, townhomes, and condos, including non-warrantable condos. Manufactured homes, co-ops, condotels, log homes, commercial, mixed-use, and agricultural-zoned property are not eligible.
• Availability: These lines are offered only in the 16 states where Lendmire runs full-service mortgage operations. That is narrower than its 41-market DSCR footprint.

The structure matters too. Investment lines run a 5-year interest-only draw, then a 25-year fully amortizing repayment. At least 75% of the line is drawn at closing. Pricing floats during both periods and never converts to fixed. You can still draw more later, but with a minimum subsequent draw of $1,000.

That 75% draw changes the plan. You start paying on most of the line on day one, whether or not you have found your next property. Open the line when a purchase is close, not as a savings account.

Does the HELOC Draw Count Against the Next Loan?

Yes, in two ways. The first is your own debt picture. The line’s payment sits in your DTI when the next lender reviews you, as BiggerPockets notes when it says the new rental has to carry its own costs plus the line payment.

The second is your cash flow. A DSCR loan sizes against the new property only. It compares monthly rent to the full payment: principal, interest, taxes, insurance, and any HOA dues, abbreviated PITIA. The line payment is not in that ratio.

That gap fools people. A property can clear 1.00 coverage and still lose money after your line payment, repairs, vacancy, management, utilities, and capital expenses. DSCR does not measure any of those. Treat a passing ratio as the lender’s test, not as proof the deal pays you.

The 1.00 ratio is where select programs start. A separate select-lender path takes coverage below 1.00 with leverage and terms adjusted.

Will the Purchase Lender Accept Borrowed Down Payment Funds?

It depends on the lender and the program. The purchase lender reviews where your down payment came from. Borrowed money comes with a paper trail: the line agreement, the draw, and the deposit into your account.

Some programs want part of the down payment from your own unborrowed funds. Others accept borrowed funds if you document them. Ask before you open the line, not after. Reserves are a separate test. Across the network they commonly run around 6 months of PITIA, though they vary by lender, leverage, loan size, and transaction type. Conservative rate-and-term files at modest leverage under $1,500,000 can see reserves waived, and larger loans often step up to about 9 months.

A purchase loan can also require enough cash for reserves on top of the down payment. A line that covers the down payment and nothing else leaves the file short.

What Should You Do If the Line Falls Short?

The honest answer is to compare tools, not force the one you started with. The table below sets the same equity against the alternatives.

A DSCR cash-out can raise more cash from the same property because the ceiling is higher. The tradeoff is that it replaces your current loan. That matters if your existing mortgage is one you want to keep.

A line on your primary home is another path. Its ceiling is higher, but the collateral changes. BiggerPockets members point out that a line on your own home puts that home at risk for a rental purchase. That is a serious step, not a footnote.

Lendmire’s piece on using an investment property HELOC to fund your next down payment covers the funding route itself.

Why Does the Cap Leave a Cushion?

Lenders set a line by taking a percentage of the appraised value and then subtracting the mortgage balance. The CFPB’s HELOC booklet lays out that method. No federal rule sets the maximum percentage. The ceiling is lender and investor policy, which is why investment properties get lower caps than primary homes.

The same CFPB material, in its current HELOC brochure, adds two points that matter for an investor. A lender may reduce your credit line if the property’s value drops. If you sell, you are generally required to pay the line off in full.

What Is the Risk Plan for a Drawn Line?

Plan the exit before the draw. A drawn line is a floating-price loan that you carry alongside the new mortgage. Test three things:

1. Higher payments: Pricing floats, so your payment can rise during the draw and repayment periods. Ask whether the new rental still works if it does.

2. Softer rents or more vacancy: Run the new property at lower rent. If the cash flow only works at full occupancy, the margin is thin.

3. Value drops: A lower appraisal can shrink or freeze the line, and it also lowers the equity you can refinance later.

Then pick an exit. Common routes are paying the draw down from cash flow, refinancing the rental into a DSCR cash-out that pays off the line, or selling a property. An investor who plans to refinance still needs the rental to qualify later, with enough coverage and equity for the cash-out ceiling. Hold the line until the plan is clear, and do not draw more than the purchase needs.

Whatever route you choose, remember what the line cannot do. It never erases leverage caps, credit floors, reserve rules, or property eligibility. The strongest files clear both tests: enough equity and enough rental coverage. The complete DSCR loans guide walks through how those two tests fit together.

Key Terms Defined

• Combined loan-to-value (CLTV): Every loan secured by the property, added together, divided by its appraised value.
• Equity: The property’s value minus what you owe on it.
• Draw period: The stretch when you can borrow from the line and pay interest only.
• DSCR (debt service coverage ratio): Monthly rent divided by the full monthly payment on the property.
• PITIA: Principal, interest, taxes, insurance, and association dues, added into one monthly payment.
• Vesting: How the property’s title is held, such as an individual or a living trust.
• Seasoning: The waiting period a lender wants before it will count new equity or a new purchase.

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 and arranges financing through select lenders in its wholesale network. Nothing here is a commitment to lend, and every file is reviewed individually.

About Lendmire

As a mortgage broker (NMLS# 2371349), Lendmire helps homeowners and real estate investors in its 16 full-service states open home equity lines of credit arranged through wholesale lenders. Lendmire is never the lender; line amounts, ceilings and terms are set by the lender under its guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. NerdWallet – Can You Get a HELOC on an Investment Property

2. BiggerPockets – 8 Ways to Use Home Equity

3. BiggerPockets – Using HELOC for down payment or full purchase

4. CFPB HELOC booklet

5. CFPB HELOC brochure