Interest Only HELOC for Investment Property

The Quick Read: An interest-only HELOC is a revolving line of credit where the borrower pays only interest on the drawn balance during the draw period, then moves to full principal-and-interest payments. On an investment property, the line is reviewed on the borrower’s personal credit, debts and equity, not on the rent. Select lenders in Lendmire’s wholesale network write these lines against rentals, subject to lender guidelines.

• Investment lines cap at 70% CLTV and a $500,000 maximum line, with a 700 minimum credit score.
• The investment structure is a 5-year interest-only draw followed by a 25-year fully amortizing repayment.
• Pricing floats through both phases and never converts to fixed.
• Title must sit in the individual’s name or a revocable living trust. An LLC cannot hold title.
• Adding a second payment lowers combined rent coverage on a property that already carries a DSCR first.

Most investors who search this phrase want to know three things: whether a lender will write the line on a rental at all, what the payment does when the draw ends, and how it interacts with a DSCR first mortgage. This article walks through each one in file order.

What Is an Interest-Only HELOC?

An interest-only HELOC is a standard home equity line with an interest-only payment during the draw period. It is not a separate loan type. It is a feature of the draw phase.

The CFPB describes a HELOC as an open-end line of credit that lets a borrower draw repeatedly against home equity, up to the credit limit, during the draw period. Equity means value minus what is owed. During the draw, the payment covers interest on the drawn balance only. Principal does not shrink.

On the investment-property line the brokerage places, the draw runs five years. Repayment then runs 25 years, fully amortizing. At least 75% of the line is drawn at closing, which separates this structure from the unused-line model many people picture. After closing, later draws carry a $1,000 minimum in most states.

Two points trip up new borrowers. First, interest-only does not mean cheap for the whole term. The balance is the same on the last day of the draw as on the first. Second, the line is a variable-pricing product. The payment moves even if the borrower never draws again.

How Does Underwriting Treat It, Step by Step?

Underwriting runs on the borrower, not the rent. That is the biggest difference from a DSCR loan, which qualifies primarily on property-level rental income covering the payment, subject to lender guidelines. A HELOC file runs through six checks.

1. Collateral policy. Many lenders do not write lines on non-owner-occupied property at all. That is a lender policy choice, and it is why the pool of lenders for this product is small. Peer investor reports point the same direction: BiggerPockets hosts a discussion of banks declining rental collateral.

2. Credit. The investment line requires a 700 minimum score. Credit above 700 does not buy more leverage here: both the 700 and 720 tiers reach the same 70% CLTV. Treat 700 as a hard floor with no tier beneath it. The report cannot be more than 90 days old at closing, and there are no rescores.

3. Debt-to-income. The ceiling is 50%, and a ratio above 45% requires a 680 minimum score. The qualifying payment is calculated as interest-only on the maximum draw, not on the amount actually drawn.

4. Combined loan-to-value. CLTV adds every lien and divides by value. On an investment property, the ceiling is 70% CLTV. The CFPB’s older HELOC booklet shows the general mechanic: lenders take a percentage of appraised value and subtract the balance on the existing mortgage. Market-wide examples in that booklet use 75% as an illustration. On this network’s investment line, the figure is 70%.

5. Valuation. Because an investment line caps at $500,000 and full appraisals begin only above that size, an investment HELOC sits in the automated-valuation lane. A traditional appraisal is commonly skipped, though a secondary valuation can be required, and a borrower may request a full appraisal.

6. Title and vesting. Title must be held by the individual or an inter vivos revocable living trust. LLCs, corporations, partnerships, and irrevocable, blind or land trusts cannot hold title.

Property type matters too. Single-family, 2-4 unit, PUD, townhome and condominium (including non-warrantable) are eligible. Manufactured homes, co-ops, condotels, log homes, commercial, mixed-use and agricultural-zoned property are not offered. A borrower is limited to three lines, and an investor owning more than 15 financed properties is not eligible.

What Happens When the Draw Ends?

The payment steps up, and it can jump hard. When repayment begins, the borrower pays principal and interest on the balance. Yahoo Finance notes that borrowers who paid interest only can see payments rise dramatically, and that some lines carry a balloon requirement at the end of the draw. On this network’s investment structure, the balance amortizes over 25 years instead of balloon-ing, but the step-up is real.

Rents rarely rise to match. Before the draw ends, model the amortized payment against each property’s rent. A rental that covered the interest-only payment comfortably can cover the amortizing payment thinly, or not at all.

The line also carries a lender protection. HELOCs generally allow the lender to freeze or reduce the line if the home’s value falls or the borrower’s finances worsen, as described in the CFPB’s booklet. A line that was available last year is not a guaranteed source of capital next year.

Which Structures and Variations Exist?

The phrase “DSCR HELOC” is not one product. Three different things get that label:

The revolving line here is a standalone line in first or second lien position. A borrower holding an existing low-fixed first mortgage can add the line behind it and keep the first untouched. A cash-out refinance replaces and reprices the first.

On primary residences and second homes, a shorter structure also exists: a 3-year interest-only draw with a 17-year repayment. Investment lines run the 5-year/25-year structure only.

Where Does the General Rule Break?

Six edge cases come up on real files.

LLC title. Many investors hold rentals in an LLC, and the line does not fit that structure. Title must be in the individual’s name or a revocable trust. A property already deeded to an LLC needs a vesting change or a DSCR cash-out refinance instead. Re-vesting has legal and liability consequences, so an attorney belongs in that conversation. Deeded-to-entity files are a common reason these lines get declined, subject to program terms.

Behind an existing DSCR first. The first lender’s documents control whether a second lien is allowed. A DSCR first bought near maximum leverage often leaves no room under a 70% CLTV ceiling.

Two-payment math. A second lien lowers combined coverage. A first loan that clears 1.00x alone can fall below it once the second payment is added. The interest-only phase softens day-one coverage. A closed-end second hits it immediately. Coverage below 1.00 is available through select lenders in the network, with leverage and terms adjusted, but a file that slips under 1.00 by accident is a different conversation from one structured that way.

Sequencing. A later DSCR cash-out refinance must pay the line off or get the holder to subordinate. The junior holder is not required to sign. Plan the exit before opening the line.

Prepayment penalty. A penalty on the first loan stays in force when a second is added, and it becomes a direct cost if the investor later refinances.

Owner-occupied rentals. Business-purpose treatment depends on occupancy, and a borrower who occupies the property more than 14 days a year can fall outside it. Regulation Z deems credit for non-owner-occupied rental property to be business-purpose, with that 14-day exception. In practice, lender policy rather than the federal rule decides whether a line is available.

Listed-for-sale property is also ineligible in Indiana, North Carolina, Pennsylvania, Tennessee, Texas and Washington if listed within the past 60 days. HELOC availability runs through Lendmire’s 16 full-service states only, narrower than the 41-market DSCR footprint.

HELOC or DSCR Cash-Out: How the Decision Looks in Practice

A HELOC suits an investor who holds a low fixed first, has strong personal credit and DTI, holds title personally, and wants flexible draws. A DSCR cash-out suits one whose title sits in an LLC, whose personal DTI is stretched, or whose rent supports the payment better than their personal file does.

The two tests differ. The line asks whether the borrower can carry the payment. A DSCR loan asks whether the rent can. The strongest files clear both: enough equity and enough coverage. For standard rentals, DSCR cash-out refinances top out around 75% LTV, with about six months of seasoning as the common expectation, subject to lender guidelines. That is a higher leverage ceiling than the 70% on the line, with a different tradeoff in title and repricing.

The common recycle strategy is buy with the line, refinance, repay the line. It only works if the refinance happens. Seasoning, valuation and coverage all have to cooperate. For more on how DSCR coverage and leverage work, see the complete DSCR loans guide. For the refinance side of the interest-only question, Lendmire’s interest only refinance investment property covers the alternative structure.

A practitioner note on file mechanics: most failures on these files come from entity title, a stacked first-lien payment that sinks combined coverage, or a borrower who assumes the line sizes off rent. None of those show up until the file is in review. Sort title and the first-lien math before submitting.

Key Terms Defined

CLTV: Combined loan-to-value, which adds every lien on the property and divides by its value.

Draw period: The phase when the borrower can pull funds and pays interest only on the drawn balance.

Repayment period: The phase after the draw, when principal and interest are due and no new draws are allowed.

Subordination: A junior lien holder’s written agreement to stay behind a new first mortgage.

Vesting: How title to the property is held, such as an individual or a revocable trust.

DSCR: Debt service coverage ratio, which compares rent to the full monthly obligation. Clearing 1.00x is not the same as positive cash flow, because repairs, vacancy, management and utilities sit outside the calculation.

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.

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. An illustrative calculator on the site can help frame the comparison, though it is an estimate, not a quote.

About Lendmire

Lendmire (NMLS# 2371349) is a mortgage broker that arranges financing through select lenders in its wholesale network, including DSCR investor loans across 41 markets, Washington, D.C. included. It never acts as the lender. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. CFPB – What is a HELOC

2. BiggerPockets – HELOC on investment rental properties

3. CFPB – HELOC booklet

4. Yahoo Finance – Interest-only HELOC