Best Investment Property HELOC Program With Interest-Only Payments on a Rental

The Quick Read: On the lenders Lendmire works with, an investment-property line pairs a 5-year interest-only draw with a 25-year fully amortizing repayment, up to 70% combined loan-to-value (CLTV) and $500,000, so the best fit depends on your equity, credit, title and hold plan. Interest-only lowers the carrying cost on what you have drawn, but it never reduces principal. Lendmire is a mortgage broker, so it matches the file to a wholesale lender instead of lending itself.

• Leverage: On an investment property, the ceiling is 70% CLTV, and 700 is the minimum credit profile. Credit above 700 buys eligibility, not extra leverage.
• Size and opening draw: Lines run from $25,000 to $500,000, and at least 75% of the line is drawn at closing.
• Underwriting basis: The file is judged on credit, debt-to-income, equity and occupancy. The line is tested on the interest-only payment at the maximum draw, and rent is not a separate coverage test; where rent counts, it counts as income inside your debt-to-income ratio.
• Title: The rental must sit in your personal name or a revocable living trust. An LLC cannot hold title on this line.
• Payment step-up: Pricing floats through both phases and never converts to fixed. The payment rises when the draw ends and principal starts.

Key Terms Defined

HELOC is a home equity line of credit: a revolving line secured by property that you borrow against as needed.

CLTV is combined loan-to-value: your first mortgage balance plus the new line, divided by the property’s value.

Draw period is the window when you can borrow from the line. Here it lasts 5 years, and the minimum payment covers interest on the drawn balance.

Repayment period is the stretch after the draw ends. The line closes to new borrowing, and the balance amortizes over 25 years.

Amortizing means each payment includes both interest and principal, so the balance falls.

Lien position is where your line sits in the pecking order if the property is ever sold to satisfy debts. The line here can sit in first or second position.

DSCR is the debt service coverage ratio: monthly rent divided by the full monthly housing payment (principal, interest, taxes, insurance and any association dues).

What Does an Interest-Only HELOC Actually Do on a Rental?

It lets you borrow against the equity in a rental and pay only the interest on what you have drawn. The balance stays flat unless you send extra principal. Nothing about the structure forces the debt down.

A line has two phases. In the draw phase, you can borrow up to your limit, and the minimum payment is interest on the drawn balance. In the repayment phase, borrowing stops and the balance amortizes.

Consumer-bank lines often run longer draws. Experian’s interest-only HELOC explainer describes a draw that is often 10 years, followed by repayment of the full balance plus interest. That is a market-wide description of consumer lines. On the investment-property lines Lendmire arranges, the draw is 5 years and the repayment is 25 years, subject to lender guidelines.

Two features of this structure matter more than people expect. First, at least 75% of the line is drawn at closing, so interest runs on most of the line from day one. It is not an on-demand reserve. Second, pricing floats in both phases and does not convert to fixed.

How Does Underwriting Treat an Investment HELOC, Step by Step?

The lender sizes the line from your equity, then checks your credit, your debt load and the property. Rent matters mainly as income that counts toward your debt-to-income ratio under each lender’s guidelines. It does not set the line size.

1. Equity test. The lender takes 70% of the property’s value on an investment property, then subtracts the first mortgage balance. What is left is the most the line can be, up to $500,000.

2. Credit. The minimum credit profile on an investment line is 700. The lender uses a single-bureau score tied to the primary wage earner. The report must be no more than 90 days old at closing, and rescores are not allowed.

3. Debt-to-income. The maximum is 50%. The lender calculates it with the interest-only payment on the maximum draw, not on what you plan to borrow.

4. Property and title. The property must be eligible and held by you or your revocable living trust. The next sections cover both.

5. Documents. Expect to provide the current first-mortgage statement, the insurance declaration, the vesting deed, and a current lease or other rent evidence.

6. Valuation. Lines at or below $500,000 ordinarily run on an automated valuation with no traditional appraisal. A higher CLTV may call for a second valuation, and you can request a full appraisal in any case. Because investment lines cap at $500,000, they sit in that lane.

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

A BiggerPockets thread on rental-property HELOCs lists strong credit, verified rents, occupancy and a manageable debt-to-income ratio as what lenders look for. That is investor discussion rather than program rules, but it matches the shape of the file above.

A Sizing Example in Percentages

Take a rental worth 100% of its appraised value. If the first mortgage is 40% of value, the most the line can be is 30% of value (70% minus 40%). If the first mortgage is 60%, the room shrinks to 10%. If the rental is paid off, the room is 70% of value, but the $500,000 line cap still applies. The same formula works at any price.

What Happens When the Draw Ends?

Your payment steps up, because principal joins the payment for the first time. This is the part of an interest-only line that surprises people.

The Consumer Financial Protection Bureau’s HELOC brochure explains why. Draw-period payment rules are set by each plan. Some require a slice of principal, and others allow interest-only, so interest-only is a contract feature rather than a given. The brochure adds that variable-rate payments can change even if you draw nothing more. It also says repayment is often set over ten or 15 years, and that some plans let the entire balance come due at once.

An investment line here is gentler than a balloon. It uses a 5-year interest-only draw followed by a 25-year fully amortizing repayment. Even so, the first fully amortizing payment is larger than the interest-only payment, and the floating pricing means neither number is fixed.

Test the rental in both phases before you open the line. In the draw phase, ask whether rent covers the interest on the drawn balance with room to spare. In the repayment phase, ask whether rent still covers the larger amortizing payment after repairs, vacancy, management and a rise in pricing. If the property only works in phase one, the line is a short bridge and not a hold-period tool.

Which Properties and Ownership Structures Qualify?

Eligible collateral includes single-family homes, 2-4 unit properties, PUDs, townhomes and condominiums, including non-warrantable condos. Multi-unit properties carry a 640 minimum on the longer-runway program, which investment lines already exceed at 700.

Not eligible: manufactured homes, co-ops, condotels, log homes, commercial property, mixed-use property, and property with agricultural zoning. A modular factory-built home is eligible only on certain structures.

Title is the sharpest edge case. The borrower must be an individual or an inter vivos revocable living trust. LLCs, corporations, partnerships, and irrevocable, blind or land trusts cannot hold title. A BiggerPockets discussion of HELOCs on properties in an LLC says most lenders will not issue a HELOC directly to an LLC, which is consistent with the title rule above.

If your rental already sits in an LLC, you have two realistic paths. You can change the vesting after talking to an attorney about title and due-on-sale terms. Or you can pursue a DSCR cash-out refinance, where LLC-titled borrowers may be accommodated subject to lender program eligibility.

Other limits to know:

• Lien position. The line is standalone and can sit in first or second position.
• Number of lines. A borrower is limited to three lines, and combined exposure caps vary by program.
• Portfolio size. A borrower with more than 15 financed properties is not eligible.
• Availability. Equity lines are offered in a narrower set of states than Lendmire’s DSCR footprint of 41 markets, including Washington, D.C.

Large retail lenders often decline rental collateral altogether. Investors on BiggerPockets describe banks citing tenant non-payment risk. That is one reason a broker that shops several wholesale lenders can be useful here.

How Does a Rental HELOC Compare With a DSCR Cash-Out Refinance?

They solve similar problems with opposite underwriting. A HELOC is sized by equity and judged on your credit and debt-to-income. A DSCR cash-out refinance qualifies primarily on property-level rental income covering the payment, subject to lender guidelines.

A few details sit behind that table. On a standard rental, DSCR cash-out tops out around 75% LTV across most of the network, and on short-term-rental collateral the ceiling is 70%. About six months of seasoning is the common expectation. Coverage of 1.00 is where many select programs start. A separate select-lender path takes coverage below 1.00, with leverage and terms adjusted. Interest-only periods and 40-year terms are available through select lenders in the network. Final terms depend on the lender’s guidelines, the property type, and the borrower’s complete credit picture.

Remember what a coverage ratio measures. It compares rent to the housing payment only. Clearing 1.00 is not the same as positive cash flow, because repairs, vacancy, management, utilities and capital expenses sit outside the calculation.

The complete DSCR loans guide covers the loan side from the ground up.

What Is the Best Program for Your Situation?

The best program for your situation depends on equity, credit, title, debt load and how long you plan to hold. There is no single winner. A broker’s job is to match the scenario to the lender whose guidelines fit it.

Some investors draw to fund renovations on the same rental.

The better question is often what the money is for. A HELOC suits a short, defined project with a clear payoff route, such as a renovation that supports refinancing the first mortgage later. A DSCR cash-out refinance suits a long hold where you want a fixed-rate spine and the rent drives qualification.

Who Should Skip an Interest-Only Rental HELOC?

Skip it if the property only works while you pay interest. A payment that rises when principal begins, on a line whose pricing floats, can turn thin margins negative.

Skip it if your debt-to-income ratio is already stretched. The line is tested on the interest-only payment at the maximum draw, so a large line sizes against you even if you plan to draw little.

Skip it if you lack a repayment plan. Interest-only delays principal and does not erase it. If the payoff depends on a sale or refinance that may not arrive on schedule, build in extra margin.

Skip it if you own the rental through an LLC and do not want to change title. Skip it too if you need more than $500,000, or if your credit sits below 700. Those are structural limits, and no amount of equity moves them.

A larger down payment or more equity on another deal never erases credit floors, leverage caps, reserve rules or property eligibility. The strongest files clear both tests: enough equity and enough rental coverage.

Compare Your Options With a Broker

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. Every figure above is subject to lender guidelines and full file review, and nothing here is a commitment to lend.

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. Experian interest-only HELOC explainer

2. BiggerPockets: HELOC on rental properties

3. CFPB HELOC brochure

4. BiggerPockets: HELOCs on properties in LLC

5. BiggerPockets: HELOC on investment rental properties