Best Investment Property HELOC Program With Interest-Only Payments

The Quick Read: The right interest-only line for your rental is the one whose structure, leverage limits, title rules, and underwriting fit your file, and in Lendmire’s wholesale network that means a 5-year interest-only draw, a 25-year repayment, and a ceiling of 70% CLTV on an investment property. Lendmire is a mortgage broker, so the job is matching your property to the lender whose guidelines fit, not pushing one product. Every figure below is subject to lender guidelines and full file review, and none is a commitment to lend.

• Investment lines in the network run one structure only: a 5-year interest-only draw, then a 25-year fully amortizing repayment.
• The ceiling is 70% CLTV (combined loan-to-value, defined below) on an investment property, with a line size of $25,000 to $500,000.
• Credit starts at 700, a hard floor with no tier beneath it. Scores of 700 and 720 both reach the same 70% CLTV, so a higher score adds no leverage on an investment line.
• At least 75% of the line is drawn at closing, which shrinks the interest-only benefit.
• The property must sit in your personal name or a revocable living trust. An LLC cannot hold title.

What an Investment Property HELOC Actually Is

A HELOC is a revolving credit line secured by real estate. You borrow what you need, repay, and borrow again during a set window. On a rental, the collateral is the rental itself, and the line can sit behind your existing first mortgage or stand in first position.

Fewer lenders write these lines on rentals than on primary homes. NerdWallet reports that rental lines come with a smaller lender pool and stricter requirements, and that you generally can’t borrow as much as against a primary home. That matches what a broker sees when shopping the product across lenders.

So no single stable ranking of programs exists. The lenders that write this depend on your property type, credit profile, title, and how much you need to borrow. A broker that shops several wholesale lenders can match the scenario to a program instead of guessing.

How Underwriting Treats the Line, Step by Step

Underwriting on an investment line runs on your personal file, not the rent. Here is the sequence.

1. Equity test. The lender sets the maximum line from CLTV. The formula is simple: property value times the CLTV ceiling, minus your first-mortgage balance. Experian reports that market lenders generally want about 20% equity left after the full line is drawn. On this network, an investment property tops out at 70% CLTV, so at least 30% equity stays in the property.

2. Credit. Market surveys report that rental lines often want a score of 720 or higher, per NerdWallet’s guidance linked above. In the network, investment lines start at 700, and both 700 and 720 reach the same 70% CLTV. There is no tier below 700.

3. Debt-to-income. DTI means your monthly debts divided by your monthly income. The maximum is 50%, and the test uses the interest-only payment calculated on the maximum draw, not on what you actually borrow. A line you plan to draw lightly is still tested as if fully drawn.

4. Valuation. An investment line caps at $500,000, and full appraisals begin only above that size. So an investment line is structurally in the automated-valuation lane and commonly closes with no traditional appraisal. A higher CLTV may call for a secondary valuation, and you can always request a full appraisal.

5. Documents. Expect the first-mortgage statement, the insurance declaration, the vesting deed, and proof of income and assets, depending on the program.

Notice what is missing. This type of line does not qualify on the rent. DSCR loans work differently, and the complete DSCR loans guide covers that path, where the property’s rental income covering the payment is the main test, subject to lender guidelines.

How the Interest-Only Draw Works (and What Happens After)

During the draw, you pay interest only on the balance you have actually drawn. The balance does not shrink unless you voluntarily pay principal. When the draw ends, borrowing stops and the repayment period begins, where every payment includes principal.

Yahoo Finance describes market HELOCs with draw periods that typically last 10 years, and it warns that payments can rise sharply once repayment starts. The network’s investment structure is shorter: 5 years of interest-only, then 25 years of principal and interest. That means the step-up arrives sooner, but it is spread over a long runway. For readers weighing a longer draw, Lendmire’s piece on a 10-year interest-only draw period explains the tradeoff. A 3-year draw is not offered on investment lines.

Three mechanics matter more than the headline structure:

• Drawn at closing. At least 75% of the line is drawn at closing. The line behaves like a mostly funded interest-only loan, not an unused safety net.
• Floating pricing. Pricing floats through both the draw and repayment periods and never converts to a fixed structure. Bankrate notes that the minimum payment rises as you draw more, even when it covers only interest, and it urges caution on investment property.
• Minimum size. The line starts at $25,000, so small top-ups are not the target use.

Here is a worked picture in percentages. Say your first mortgage is 50% of the property’s value. A 70% CLTV ceiling leaves room for a line of up to 20% of value, subject to the $500,000 cap. Because at least 75% of that line is drawn at closing, at least 15% of value is borrowed on day one and carrying interest. The undrawn remainder, up to 5% of value, is what you can draw later.

Interest-only also is not a guaranteed feature of every HELOC. The plan contract decides, and on this network the investment structure is the 5-year interest-only draw with no alternative. For a related angle on carrying cost, see Lendmire’s article on how an interest-only period can improve cash flow on an investment property HELOC.

What Makes a Program the Best Fit for Your Rental

The best program for your situation is the one that clears four checks at once. Run them in this order.

• Title. Is the property in your name or a revocable trust? If it sits in an LLC, this product is off the table until the vesting changes.
• Leverage. Does 70% CLTV on an investment property leave enough room after your first mortgage? If your equity is limited, the line may be too small to be useful.
• Debt-to-income. Does your DTI clear 50% when tested at the full line?
• Property type. Is the property one of the eligible types?

Eligible properties include single-family homes, 2-4 unit buildings, PUDs, townhomes, and condominiums, including non-warrantable condos. Manufactured homes, co-ops, condotels, log homes, commercial, mixed-use, and agricultural-zoned properties are not offered.

The best program also depends on what you want the money to do. A line used to fund a down payment on the next rental or a renovation fits the draw structure. Money needed for a decade of carry fits a longer-term loan better.

Key Terms Defined

HELOC: A revolving line of credit secured by real estate, where you borrow, repay, and borrow again during the draw period.

CLTV (combined loan-to-value): Your first mortgage plus the new line, divided by the property’s value.

Draw period: The window when you can borrow from the line and pay interest only on what you have drawn.

Repayment period: The stretch after the draw ends, when borrowing stops and payments include principal.

Interest-only payment: A payment covering the interest on the drawn balance and none of the principal.

Lien position: Whether the line sits first in line for repayment or behind an existing first mortgage.

Automated valuation: A computer-generated property value used in place of a traditional appraisal on smaller lines.

Where the Rules Break

These are the edge cases that catch investors who assume the general rule applies.

Your LLC owns the rental. This is the sharpest difference from a DSCR loan. LLCs, corporations, partnerships, and irrevocable, blind, or land trusts cannot hold title on these lines. A property already deeded to an LLC needs a vesting change or a DSCR cash-out refinance instead. DSCR loans to LLC-titled borrowers are available subject to lender program eligibility.

The property type is not on the list. Condotels, co-ops, log homes, manufactured homes, and agricultural or mixed-use properties are not offered. This is a hard stop, not a pricing issue.

The property was recently listed. In NC, PA, TN, TX, and WA, a property that is listed for sale, or was listed within the past 60 days, is ineligible.

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

Too many lines or properties. A borrower is limited to three lines in total, and anyone owning more than 15 financed properties is not eligible. Investors with large portfolios should check this limit early.

The line shrinks. The CFPB’s HELOC booklet says lenders may reduce your credit line if your home’s value falls. Do not treat unused line as guaranteed liquidity.

The property is empty. Payments continue whether or not a tenant is in place, because the line is underwritten on you, not on the lease. A vacant month is a personal cash-flow event.

The state is outside the footprint. The HELOC product is available only in Lendmire’s 16 full-service states. That is narrower than the 41-market DSCR footprint, which includes Washington, D.C.

HELOC or DSCR Cash-Out Refinance?

A HELOC leaves your first mortgage alone. A cash-out refinance replaces it. That difference is the first thing to weigh.

The cash-out leverage figure is a ceiling for standard long-term rentals, with about 6 months of seasoning as the common expectation. A HELOC fits when your first mortgage is worth keeping and your need is modest. A refinance fits when the need is large, the first mortgage is not worth preserving, or the property sits in an LLC.

Neither is cheaper by default. The comparison is the full cost of each structure over your holding period, which is a case-by-case calculation.

Planning for the Step-Up Before You Draw

Interest-only payments feel cheap because the balance never moves. The bill comes at month 61, when principal joins the payment and the balance amortizes over the remaining 25 years. Plan for that step on day one, not in year four.

Three exits make sense, and they work best when chosen before you draw:

1. Repay from a sale or a stabilized-property refinance. Use the draw as bridge capital with an end date.

2. Pay principal voluntarily during the draw. This softens the step-up, since extra money reduces the balance.

3. Refinance into a DSCR loan once title and seasoning allow it. Moving the property into an LLC and then into a DSCR cash-out refinance can replace the line.

Floating pricing is the other risk. Because the line never converts to fixed, your carrying cost can move in either direction through both periods. Test your cash flow with a cushion, and keep in mind that clearing a coverage ratio is not the same as positive cash flow. Repairs, vacancy, management, and capital expenses sit outside any lender’s calculation.

Where to Go From Here

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 brokers through select wholesale partners and is never the lender. The calculator on this page gives an illustrative estimate only, so use it to test the shape of a deal, not to expect a quote.

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

2. Experian

3. Yahoo Finance: Interest-Only HELOC

4. Bankrate: HELOC Calculator

5. CFPB: HELOC Booklet