HELOC Lenders With a Thirty-Year Interest-Only Structure

The Quick Read: A thirty-year HELOC is a thirty-year total life, built from an interest-only draw period followed by a fully amortizing repayment period, not thirty years of interest-only payments, and on investment properties the lenders that offer one are limited, so structure, occupancy and title all decide which program fits. Lendmire is a mortgage broker, not a lender. It places these lines through select wholesale lenders, and every figure below is subject to lender guidelines and full file review.

• The thirty years usually splits into a draw period and a repayment period. On this network, the investment-property line is a 5-year interest-only draw followed by a 25-year fully amortizing repayment.
• Investment lines top out at 70% CLTV, with a 700 minimum credit score and a $500,000 maximum line.
• A 90% CLTV ceiling exists only on primary-residence and second-home lines, and only at 720 or better credit.
• The borrower is underwritten, not the property’s rent. LLCs cannot hold title on these lines.
• A DSCR cash-out refinance is the contrast product, because it qualifies primarily on property-level rental income covering the payment.

What HELOC Lenders Mean by a Thirty-Year Structure

The phrase describes total term. NerdWallet says the draw usually lasts about 10 years with interest-only payments required, followed by repayment of principal and interest over up to 20 years, for a 30-year total. Experian describes draws of five to 10 years followed by a 20-year repayment period, and notes that some lines offer 15- or 20-year draws.

So the first question to ask any HELOC lender is how many of the thirty years are interest-only. The answer is rarely thirty.

On the network Lendmire works with, the split is fixed by occupancy. An investment-property line runs a 5-year interest-only draw and a 25-year fully amortizing repayment, and that is the only structure offered on investment lines. Primary residences and second homes have two options: a 3-year draw with a 17-year repayment, which totals 20 years, or the 5-year draw with a 25-year repayment. Only the 5/25 version adds up to thirty years. Tennessee shortens both structures, to 3 years with 12, and to 5 years with 10, so neither reaches thirty there.

Structure Types at a Glance

Three shapes show up across the market. Only the first two exist on this network, and neither of them is available in every state on its standard terms, since Tennessee shortens both.

The third row is real. Experian notes that some HELOCs carry a balloon payment, meaning the full balance plus interest is due when the draw ends. Both network structures amortize fully in repayment, so no balloon is built in.

How Underwriting Treats a HELOC, Step by Step

Each file is judged on the borrower’s own profile rather than on rental income from the building. These steps run in order, and a file has to clear each one.

Step 1: Collateral and lien position. The line is a standalone HELOC in first or second lien position. If a first mortgage already exists, the HELOC sits behind it.

Step 2: Title and vesting. Title must be held by the individual borrower or an inter vivos revocable living trust. LLCs, corporations, partnerships, and irrevocable, blind or land trusts cannot hold title. A property already deeded to an LLC needs a vesting change first, or a different product.

Step 3: Property type. Eligible types are single-family, 2-4 units, PUDs, townhomes, and condominiums, including non-warrantable ones. Manufactured homes, co-ops, condotels, log homes, and commercial, mixed-use or agricultural-zoned properties are not offered.

Step 4: Credit. The program floor is a 600 score, but occupancy raises it. Second homes start at 640 and investment properties start at 700. The score is a single-bureau score keyed to the primary wage earner. The report can be no more than 90 days old at closing, and rescores are not allowed.

Step 5: Combined leverage. CLTV is the first mortgage plus the new line, divided by value. The ceiling depends on occupancy and score, as shown in the next section.

Step 6: DTI. Maximum DTI is 50%, or 45% for credit profiles from 600 to 679. A ratio above 45% requires a 680 minimum. The test uses the interest-only payment calculated on the maximum draw, not the amount the borrower plans to use.

Step 7: Valuation. Lines at or below $500,000 ordinarily use an automated valuation, though a higher CLTV may require a secondary valuation. A full appraisal is required on every line above $500,000, and any borrower may request one.

The Leverage Ceiling Depends on Occupancy

No single ceiling applies to every HELOC. The table shows how the parameters differ by occupancy.

For investment properties, 70% is the top of the range at both 700 and 720 or better. Lower-tier primary and second-home borrowers sit well below the 90% figure. A primary residence at 640 or better, for example, tops out at 80% CLTV.

Line sizes run from $25,000 to $750,000, with a Michigan floor of $10,000. A line above $500,000 is primary-residence only. It requires 700 or better (720 on the 5-year draw structure, the longer-runway option), caps at 75% CLTV, and requires a full appraisal.

Figures quoted elsewhere may differ from these, and they describe the broader market, not this network. Taxstra notes that large national banks often decline or heavily restrict investment-property HELOCs. That scarcity is why the occupancy tiers matter so much when you shop.

A Payment Timeline With No Dollar Amounts

Picture a borrower with a 5/25 line on a single-family rental.

At closing, at least 75% of the line is drawn, so interest cost starts on day one. Pricing floats across both the draw and repayment periods and never converts to fixed. For five years the borrower pays interest on the drawn balance, and nothing reduces principal.

In year six the draw ends and the line stops advancing. The full balance now has to amortize over 25 years. The payment steps up even if pricing hasn’t moved at all, because principal enters the payment for the first time. NerdWallet’s HELOC calculator makes the same point: unless you pay principal during the draw, the repayment-period payment will likely be substantially higher.

Paying extra principal in the draw period softens that step. It’s the only lever the borrower controls.

The risks compound in two places. The first is the pricing path. A floating line means the draw-period payment can change from month to month. The second is a line freeze. The CFPB’s HELOC booklet explains that interest-only payments mean nothing goes toward principal, and that lenders can freeze or reduce a line if the home’s value falls or the borrower’s finances worsen. Never plan a rehab budget around money you haven’t drawn.

Where the Thirty-Year Rule Breaks

Several edge cases change the answer.

Entity-held rentals. An LLC-titled rental doesn’t fit a HELOC. A vesting change is one option. A DSCR cash-out refinance, which can lend to LLC-titled entities depending on program guidelines, is the other.

Rehabbed properties. Because lines at or below $500,000 usually use an automated valuation, a recent renovation may not show up in the value. If the rehab is what created the equity, the line may come in lower than expected. A borrower can request a full appraisal in any case.

Portfolio size. A borrower is limited to three lines, with combined exposure capped at $2,000,000 on the higher-leverage structure and $750,000 on the longer-runway structure. A borrower with more than 15 financed properties isn’t eligible.

Short on credit history. Sub-640 profiles are limited to single-family residences with a clean 12-month housing history. Because second homes floor at 640 and investment at 700, that restriction affects primary residences only.

Derogatory credit. A bankruptcy needs 4 years of seasoning from discharge or dismissal. On primary residences and second homes, foreclosure history splits by structure. One structure seasons a foreclosure at 7 years and a deed-in-lieu, pre-foreclosure or short sale at 4. The other declines the history entirely. Investment files follow the 7-and-4-year path.

Availability. The HELOC 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, WA). That’s narrower than the 41-market DSCR footprint, which covers 40 states plus Washington, D.C. New Mexico and Ohio apply a CLTV cap that depends on the credit profile. A property listed for sale, or listed within the past 60 days, is ineligible in NC, PA, TN, TX and WA.

Fixed-rate expectations. The CFPB notes that some HELOCs let you convert part of the balance to a fixed rate. On this network, pricing floats and never converts. A borrower who needs a fixed payment will want a different product.

Key Terms Defined

Draw period: the stretch when you can borrow, repay and borrow again, paying only interest.

Repayment period: the stretch after the draw ends, when no new advances are allowed and principal amortizes.

CLTV: combined loan-to-value, meaning all liens on the property divided by its value.

Balloon payment: a lump sum due when a term ends, rather than a payment that amortizes the balance.

DTI: the borrower’s monthly debts divided by income, which is the main test on a HELOC.

DSCR: a property’s rent compared with its monthly obligation (principal, interest, taxes, insurance and any HOA dues), used to qualify investment loans on the property’s income.

How to Check a Lender’s Real Structure

Marketing language is loose, so the plan agreement is what counts. Ask these questions before applying:

• How many years are interest-only, and how many amortize?
• Does the line freeze or reduce if value falls?
• Is pricing floating throughout, or can part of the balance convert to fixed?
• What share must be drawn at closing, and what is the minimum subsequent draw?
• Is title limited to individuals and revocable trusts?
• Is the valuation automated, and can you request a full appraisal?
• Is there a balloon at the end of the draw?

A broker that places files with several wholesale lenders can compare these terms side by side. That’s the practical difference from a single bank’s product page. It shows which wholesale lenders’ guidelines fit your property, title and credit before you apply.

HELOC Versus a DSCR Cash-Out Refinance

For an investor whose equity sits in a rental, the real decision is often between two products. A HELOC underwrites the borrower: credit, DTI and documented income. A DSCR cash-out refinance qualifies primarily on property-level rental income covering the payment, subject to lender guidelines. Most files land at around 75% LTV on a cash-out, with about 6 months of seasoning commonly expected.

Where DSCR coverage is concerned, 1.00 is where many select programs start, and a separate select-lender path takes coverage below 1.00 with leverage and terms adjusted. Clearing 1.00 isn’t the same as positive cash flow. Repairs, vacancy, management and capex sit outside the calculation.

For investors who want interest-only payments, DSCR structures with interest-only periods and extended terms such as 40-year are available through select lenders in the network. A DSCR loan doesn’t add to personal DTI the way a HELOC does, which matters for the next purchase. The tradeoff is a different pricing structure and a one-time closing rather than a revolving line. Lendmire’s complete DSCR loans guide covers the rest.

Who This Fits

A HELOC with a long interest-only draw tends to fit an investor who holds title personally or in a revocable trust. It suits someone with a 700-plus score and room under the DTI limit, and someone who can handle a floating payment. It works best when the money has a defined use, such as a down payment or a rehab, and a plan for the repayment step-up.

It’s a weaker fit for an LLC-titled portfolio, a borrower near the DTI ceiling, or anyone who needs a payment that stays fixed. If a borrower is reaching for a HELOC because rent doesn’t cover a conventional payment, the DSCR route is likely the cleaner structure. The line freeze risk also argues against using a HELOC as the only source of a closing deposit on a time-sensitive purchase.

If You Are Weighing Your Options

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 through the quote page.

About Lendmire

Lendmire (NMLS# 2371349) is a mortgage broker. Home equity lines of credit — on a primary residence, a second home or an investment property — are arranged through wholesale lenders in Lendmire’s 16 full-service states, and every line is underwritten by the lender under its program guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. NerdWallet – Is a HELOC a good idea

2. Experian – What is a draw period on a HELOC

3. Taxstra – HELOC on a rental

4. NerdWallet – HELOC calculator

5. CFPB – HELOC brochure

6. CFPB – What is a HELOC