How an Investment Property HELOC Works on an Interest-Only Rental

The Quick Read: An investment property HELOC is a revolving line secured by the rental itself, and during the draw period the required payment covers interest on the drawn balance only, so principal stays flat until repayment starts. On the network Lendmire brokers through, that draw runs five years and is followed by a 25-year fully amortizing repayment period.

• Investment lines top out at 70% combined loan-to-value (CLTV), with a 700 minimum credit score and a $500,000 maximum line.
• At least 75% of the line is drawn at closing, so interest starts on most of the line on day one.
• Pricing floats through both the draw and repayment periods and never converts to fixed.
• Title must sit with an individual or a revocable living trust. An LLC cannot hold title.
• The payment steps up sharply when repayment begins, so test the rental at that payment, not the interest-only one.

An interest-only rental line looks cheap during the draw period. The structure is simple, but the details trip up files: who holds title, how much is drawn at closing, and what the payment does at the end of the draw. This article walks through the mechanics in order, then covers the edge cases and the decision against a DSCR cash-out refinance.

What Is an Investment Property HELOC?

A HELOC is an open-end line of credit. The federal consumer-finance regulator describes a HELOC as a line that lets you borrow repeatedly against your equity, with a draw period followed by a repayment period. Those consumer materials were written with owner-occupied homes in mind. An investment-property line uses the same mechanics but is a lender-defined product, and the rental itself is the collateral.

Here is what that means on the network Lendmire works with:

• It is a standalone line in first or second lien position.
• It is secured by the rental, not by the investor’s home.
• Eligible lines on an investment property run from $25,000 to $500,000. Anything above $500,000 is reserved for primary residences.
• Investment property CLTV is capped at 70%, with a 700 minimum credit score. Both the 720-plus and 700-plus credit tiers reach that same 70%, so a higher score above 700 does not buy more leverage.

Some banks will not call this a HELOC at all, since the H stands for home. A line of credit secured by an investment property is the product described here, whatever name a given lender uses.

Lendmire is a broker. It arranges these lines through select wholesale partners and does not lend. Every figure here is subject to lender guidelines and full file review.

How Does the Interest-Only Draw Period Work?

During the draw period, the required payment is interest on the outstanding balance. Principal does not fall unless the borrower pays extra. The federal consumer-finance regulator notes that you can generally borrow up to your limit anytime during the draw period, which could last 10 years, for example. The investment-property structure in Lendmire’s network is shorter and fixed: five years of draw.

Step by step, this is how the draw phase runs:

1. Closing draw. At least 75% of the line is drawn at closing. A borrower approved for a $200,000 line therefore starts with interest accruing on a large share of it, whether or not the money is needed yet.

2. Interest accrues on the drawn balance. Undrawn availability costs nothing in interest. Paying down the balance and redrawing is allowed during the draw.

3. Subsequent draws. After closing, the minimum draw is typically $1,000, with Texas at $4,000 on the program that states it.

4. Floating pricing. The cost moves with an index. The federal consumer-finance regulator booklet explains that variable rates are tied to a publicly available index and that lenders sometimes offer a low introductory rate for a short period. On this network, pricing floats through both the draw and repayment periods. There is no fixed-rate conversion.

What Happens When the Draw Ends?

When the five-year draw ends, the line stops revolving and the balance amortizes over 25 years. The payment now includes principal, so it jumps. Nothing about the property changes on that date, but the monthly obligation does.

The structural risks at that point are:

• Payment shock. Principal repayment is added to interest on the same balance.
• Floating pricing. The payment can also move with the index in the repayment period.
• No new borrowing. Cash that was available during the draw is no longer there as a backstop.

The practical test is to run the rental at the fully amortizing payment, not the interest-only one. If the property only works during the draw, the plan needs an exit: a paydown schedule, a refinance, or a sale.

Lenders on this network qualify borrowers using the interest-only payment calculated on the maximum draw, not just the amount drawn. A $200,000 line is underwritten as if fully drawn. The borrower’s own stress test should be tougher still.

How Do Lenders Underwrite an Investment Property HELOC?

Underwriting here is built around the borrower, not the rent. This is the sharpest difference from a DSCR loan, which qualifies primarily on property-level rental income covering the payment, subject to lender guidelines. An investment property HELOC leans on credit, equity and debt-to-income.

The core inputs on this network:

• Credit. A 700 minimum for investment property. Credit is read from a single-bureau score model keyed to the primary wage earner. The report can be no more than 90 days old at closing, and no rescores are allowed.
• Equity. 70% maximum CLTV, counting the first mortgage plus the new line.
• DTI. A 50% maximum, qualified on the interest-only payment at the maximum draw. A ratio above 45% requires a 680 minimum credit score, which the 700 investment floor already clears.
• Derogatory history. A bankruptcy needs four years of seasoning from discharge or dismissal. Foreclosure-family history follows a seven-year path for a foreclosure and four years for a deed-in-lieu, pre-foreclosure or short sale on investment files.
• Valuation. Because investment lines cap at $500,000, the file is structurally in the automated-valuation lane, and it commonly closes with no traditional appraisal. A borrower may still request a full appraisal.
• Exposure. A borrower is limited to three lines. A borrower with more than 15 financed properties is not eligible.

Bank-statement income analysis exists in parts of the network, but it needs a 680 minimum for business accounts. Since investment already floors at 700, income documentation style is never the binding constraint on this product.

What Property and Title Rules Apply?

Title is where many investors hit a structural wall. The property must be held by the individual borrower or by an inter vivos revocable living trust. LLCs, corporations, partnerships, and irrevocable, blind or land trusts cannot hold title.

That surprises investors who hold rentals in an LLC for liability reasons. If the rental is already deeded to an LLC, there are two options: change vesting, which carries its own legal and lender considerations, or use a DSCR cash-out refinance instead. DSCR loans to LLC-titled borrowers are available, subject to lender program eligibility.

On property types:

• Eligible: single-family, 2-4 units, PUDs, townhomes, and condominiums including non-warrantable ones. A 2-4 unit property carries a 640 minimum on one of the wholesale programs, which the 700 investment floor exceeds anyway.
• Not offered: manufactured homes, co-ops, condotels, log homes, commercial, mixed-use, and agricultural-zoned property.
• Listed properties. A property listed for sale, or listed in the past 60 days, is ineligible in Indiana, North Carolina, Pennsylvania, Tennessee, Texas and Washington.

Availability is limited to the 16 states where Lendmire offers full-service lending: AL, CA, CO, FL, GA, IN, MI, MT, NM, NC, OH, PA, TN, TX, VA and WA. That is narrower than the 41-market DSCR footprint.

In Texas, the primary-residence rules about waiting periods and homestead do not apply to investment properties, which are eligible as non-homestead transactions.

Key Terms Defined

Draw period: The stretch when you can borrow against the line and pay only interest on what you owe.

Repayment period: The stretch after the draw ends, when you can no longer borrow and principal gets paid down on a fixed schedule.

CLTV (combined loan-to-value): All loans secured by the property, added together, divided by the property’s value.

Interest-only payment: A payment that covers interest on the drawn balance and does not reduce principal.

Lien position: Where the lender stands in line for repayment if the property is sold or foreclosed; first lien is paid before second.

DSCR: Debt service coverage ratio, the property’s rent compared with its full monthly housing obligation.

Where Does the General Rule Break?

Several edge cases cause trouble before they show up in the payment math.

Entity title. Title rules are covered above: an LLC-held rental cannot take this line. An investor in that position needs a vesting change or a DSCR cash-out instead.

Full draw at closing. The 75% closing draw means a standby line is not really a standby line. The carry starts immediately.

Stacked liens. A second-position line reduces combined-LTV room. If you later want a DSCR cash-out refinance, the new first mortgage typically has to pay off the line, and the line lowers the proceeds available to you.

Using the home instead. Some investors draw on a line secured by their residence and invest the proceeds. That puts the home at risk and underwrites as a primary-residence file, which is a different product with different ceilings. It is not the same as a line secured by the rental.

Tax treatment. Tax treatment varies; consult a qualified professional.

Coverage is not cash flow. A rental that clears a coverage ratio of 1.0x on rent versus payment is not automatically cash-flowing. Repairs, vacancy, management, utilities and capex all sit outside that calculation. This matters more on an interest-only line, because the payment you test today is the smaller one.

How Does It Compare to a DSCR Cash-Out Refinance?

A DSCR cash-out replaces the first mortgage with a new fixed-term loan, qualified on property cash flow. An investment HELOC adds a line, usually behind an existing first mortgage, and is underwritten on the borrower.

The first mortgage is the deciding factor. An investor holding a first mortgage worth keeping may prefer a line that leaves it in place. An investor holding a rental in an LLC, or one wanting a fixed structure, will generally land on the cash-out. The complete DSCR loans guide covers the loan side.

What Does the Investor Decision Look Like?

Run both phases before applying.

1. Check title. If an LLC holds the property, stop and decide whether to change vesting or look at a DSCR cash-out.

2. Check the credit and equity gates. A 700 score is the floor, and total debt against the property cannot exceed 70% of its value.

3. Plan for the closing draw. Assume interest accrues on at least 75% of the line from day one.

4. Test the rental at the repayment payment. If the rent covers the amortizing payment with room to spare, the structure holds. If it covers only the interest-only payment, the plan depends on a paydown or refinance.

5. Decide the use of proceeds. Down payment on the next rental, rehab, or reserves each carry a different return profile and a different tax treatment.

6. Write the exit. Pay down, refinance, or sell before the draw ends.

Investors ready to compare structures can use the site’s illustrative calculator for an estimate. It is not a quote.

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 or request a quote.

About Lendmire

Lendmire — NMLS# 2371349 — is a mortgage broker that arranges home equity lines of credit in its 16 full-service states through wholesale lenders, on primary residences, second homes and investment properties. Every line is subject to the lender’s guidelines and full underwriting. 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 – What You Should Know About HELOCs booklet