Investment Property HELOC Options With Interest-Only Payments on a Rental

The Quick Read: You have three real routes. One is a standalone line secured by the rental, one is a line on your primary home that funds the rental, and one is a DSCR cash-out refinance that replaces the first mortgage. The interest-only feature on a line only lasts through the draw period, and principal payments begin after it.

• Across Lendmire’s wholesale network, an investment-property line runs a 5-year interest-only draw followed by a 25-year fully amortizing repayment, subject to lender guidelines.
• The ceiling on an investment property is 70% combined loan-to-value (CLTV), with a 700 minimum credit score and a maximum line of $500,000.
• Pricing floats during the draw and the repayment period and never converts to fixed.
• Title must sit in your name or a revocable living trust. An LLC cannot hold title.
• A DSCR cash-out refinance is the usual fallback when the property is in an LLC or you want property-rent-based lender review.

How Does an Interest-Only HELOC on a Rental Work?

A home equity line of credit (HELOC) is a revolving credit line secured by property. During the draw period, you borrow, repay, and borrow again. The required payment is the interest on what you have drawn, and nothing more.

Bankrate explains that the minimum payment equals the interest accrued that month. It rises when you draw more, because the same interest applies to a bigger balance. It also steps up when repayment begins.

On a rental, the line is secured by the rental itself. It can sit in first lien position on a free-and-clear property or second lien behind an existing mortgage. Both are standalone lines, and neither requires you to refinance the first mortgage.

NerdWallet notes that the lender pool for rentals is smaller than for owner-occupied homes. Lenders also see higher default risk on rentals and lend less against them. That matches what we see: many large retail lenders simply do not write these lines on non-owner-occupied property.

Here is how the network’s investment line is built:

• Draw structure: 5 years of interest-only payments, then 25 years of principal and interest. There is no 3-year option on investment lines.
• Drawn at closing: At least 75% of the line is drawn when the loan closes.
• Line size: $25,000 to $500,000 on an investment property.
• Valuation: Lines at or below $500,000 ordinarily use an automated valuation with no traditional appraisal. You can request a full appraisal if you want one.

The 75% draw at closing matters. You cannot park a large unused line and pay almost nothing. Most of the balance accrues interest from the start.

Key Terms Defined

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

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

Repayment period: The stretch after the draw, when you can no longer borrow and the balance amortizes with principal and interest.

DTI (debt-to-income): Your monthly debt payments divided by your monthly income. A HELOC is underwritten on you, so DTI counts.

DSCR (debt service coverage ratio): Monthly rent divided by the property’s monthly payment. A DSCR loan is reviewed primarily on property-level rental income covering the payment, subject to lender guidelines.

How Do Lenders Underwrite a Rental HELOC Step by Step?

A rental HELOC is underwritten on you first and the property second. That is the biggest difference from a DSCR loan. These are the steps in the order a file moves.

1. Title check. The borrower must hold title as an individual or in a revocable living trust. Fee simple and leasehold both work.

2. Property check. Single-family homes, 2-4 units, PUDs, townhomes, and condominiums (including non-warrantable condos) are eligible. Manufactured homes, co-ops, condotels, log homes, commercial, mixed-use, and agricultural property are not offered.

3. Equity test. The first mortgage balance plus the new line cannot exceed 70% of value on an investment property. Subtract your existing liens from 70% of value to see your maximum line.

4. Credit. The floor is 700. A 720 score reaches the same 70% CLTV ceiling, so a higher score buys no extra leverage. The report cannot be older than 90 days at closing.

5. DTI. The maximum is 50%. The lender calculates it on the interest-only payment for the maximum draw, not the amount you plan to use.

6. Portfolio limits. A borrower can hold at most three lines, and an owner of more than 15 financed properties is not eligible.

7. Credit history. A bankruptcy needs 4 years of seasoning from discharge or dismissal. On investment files, foreclosure needs 7 years, and a deed-in-lieu or short sale needs 4.

Some lenders will count part of the rent toward qualifying. Stessa says they may ask for a property income statement, a real estate balance sheet, and a tenant rent roll. Treat rent as a helper in this product, not the basis of approval.

What Changes When the Draw Period Ends?

The payment steps up, and sometimes sharply. The Consumer Financial Protection Bureau says monthly payments are often significantly higher once repayment starts. In some plans, the full balance can come due.

On the network’s investment line, the balance does not come due. It amortizes over 25 years. But the payment now includes principal, and the pricing is still floating.

CBS News calls the interest-only draw deceptive, because the balance never shrinks. Draw periods commonly run five to ten years. Our investment line sits at the short end of that range at 5 years.

Interest-only is also a feature of the contract, not a right. The CFPB’s HELOC brochure shows that some plans build principal into the draw-period minimum. Read the note before you assume the payment is interest-only.

How Do You Stress-Test the Rental Before Drawing?

Run the rental against both payment phases before you sign. Most investors only test the cheap phase. Here is the method.

Phase one: the draw. Add the first mortgage payment and the interest-only payment on the full line. Divide monthly rent by that total. Call it your combined coverage number.

Phase two: repayment. Replace the interest-only piece with the amortizing payment on the same balance. Run the same division again.

Phase three: the floating-pricing test. Raise the line’s pricing in your spreadsheet and watch what happens to both numbers.

If phase one clears and phase two does not, you are borrowing against a payment you cannot yet afford. Your options are a smaller line, voluntary principal payments during the draw, or more cash reserves. Bankrate also advises checking the note for prepayment charges before paying down early.

One caution applies to all of this. Combined coverage above 1.00 is not the same as positive cash flow. Repairs, vacancy, management, utilities, and capital expenses sit outside the ratio.

Consider a scenario where a paid-off duplex carries no first mortgage. At 70% CLTV, the line can use up to 70% of the property’s value, subject to the $500,000 cap. A lender testing DTI will use the interest-only payment on the maximum draw. That is why a small, sensible draw does not shrink the payment the lender tests.

Which Route Fits Which Situation?

Primary-home lines reach higher leverage because the occupancy is better. That 90% ceiling exists only at a 720 or better credit profile. It also puts your own home on the line to fund a rental, which is a real tradeoff.

A DSCR cash-out refinance is a different product. It replaces your first mortgage rather than adding a second lien. Across the network, standard rentals reach about 75% LTV on a cash-out. Short-term rental collateral is held to 70% on a cash-out. Seasoning of about 6 months is the common expectation. Terms depend on the lender’s guidelines, the property type, the leverage, and a full review of the credit profile.

Most programs want a score around 660, and a 620 floor exists in parts of the network. Loan sizes run up to $3,000,000 on standard programs (smaller balances available through select lenders). Coverage of 1.00 is where select programs start, and stronger ratios open better terms. Sub-1.00 coverage is available through select lenders in the network, with leverage and terms adjusted. Our complete DSCR loans guide walks through the full picture. DSCR loans are also available across 41 markets, including Washington, D.C., and can be made to LLC-titled borrowers, subject to lender program eligibility.

When Does the General Rule Break?

The rental sits in an LLC. The network’s lines cannot close in an LLC, corporation, partnership, or irrevocable, blind, or land trust. A property already deeded to an LLC needs a vesting change or a DSCR cash-out instead. Moving title has insurance, due-on-sale, and liability consequences, so talk to an attorney first.

You live in one unit. If you occupy one unit of a 2-4 unit property, it is priced as a primary residence. If every unit is rented, it is an investment line.

The property was recently listed. In Indiana, North Carolina, Pennsylvania, Tennessee, Texas, and Washington, a property listed for sale within the past 60 days is ineligible.

Your state is not on the list. These lines are available only in Lendmire’s 16 full-service states: AL, CA, CO, FL, GA, IN, MI, MT, NM, NC, OH, PA, TN, TX, VA, and WA. That is narrower than the DSCR footprint.

You plan to use the line as down payment money. The purchase lender decides whether borrowed funds count as a down payment. An open line balance does not count as reserves. Check this with the purchase lender before you draw.

The interest-only feature is not in the note. Some lenders build principal into the draw payment. Confirm the feature in writing.

Should You Take the Line or Skip It?

The line fits when you have a short, clear plan for the money. Typical examples are a rehab you will refinance out of, a down payment on the next rental, or bridge funds you will repay from a sale. It also fits when your existing first mortgage is one you want to keep.

Skip it when you plan to hold the balance for years and the payment step-up would pinch. Skip it when your DTI is already tight, since a HELOC adds to your personal liabilities and can shrink your room for the next purchase. DSCR purchase loans generally look at the property, so a HELOC-funded down payment is a common pairing, but your personal ratios still matter for the line itself.

The honest tradeoff is this. The line keeps your existing first mortgage in place and gives you cheap carry in the early years, and it is qualified on your documented income (tax returns, W-2s or bank statements) rather than on the property’s rent. A cash-out refinance costs more up front and replaces the first mortgage, but a DSCR cash-out refinance is reviewed on the rent and gives you a longer, more predictable structure. Which is better depends on your first mortgage terms, your equity, and your credit profile.

Lendmire’s look at the best investment property HELOC program for an interest-only rental covers how the program compares in detail.

About Lendmire

Lendmire is a mortgage brokerage (NMLS# 2371349) arranging home equity lines of credit — primary-residence, second-home and investment-property lines — through a wholesale lending network in its 16 full-service states. Eligibility is determined by the lender on each file. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. Bankrate – HELOC calculator

2. NerdWallet

3. Stessa – HELOC on rental property

4. Consumer Financial Protection Bureau

5. CBS News – HELOC draw period: things to know

6. CFPB – HELOC brochure

7. Bankrate – What to do when your HELOC draw period ends