How Much Can You Borrow on an Investment Property HELOC on a Rental House?

The Quick Read: Usually less than you could borrow against your own home: on an investment property, the network’s ceiling is 70% combined loan-to-value (CLTV), minus every existing lien, and capped at a $500,000 line. You need at least a 700 credit score, and the title must sit in your personal name or a revocable living trust.

• The formula: value × 70% CLTV, minus your first mortgage balance.
• The dollar cap: $25,000 to $500,000 on an investment line.
• Credit: 700 is a hard floor, and 720 buys no extra leverage.
• Title: an individual or a revocable living trust, never an LLC.
• Availability: Lendmire’s 16 full-service states only, subject to lender guidelines.

Most investors ask this question with a number in mind. They want to know what a rental house can fund next. This article walks through the math, the exceptions, and the point where a different loan makes more sense.

What Is the Formula for Your Maximum Line?

The maximum line equals the property value times the allowed CLTV, minus all existing liens, then trimmed to the program’s dollar cap. A CFPB booklet describes the same logic: lenders take a percentage of appraised value and subtract the mortgage balance. That booklet covers primary homes, so treat it as the concept only.

On an investment property in Lendmire’s network, the ceiling is 70% CLTV. There is no tier above it. NerdWallet notes that lenders treat rentals as higher risk, so fewer lenders offer lines and the borrowing room is smaller.

Here is a quick pass through three situations. All values are modeled assumptions, not market data.

The second row is the standard case. Take 70% and subtract the 45% already owed, and you have 25% of the value in available room. The third row shows the trap. A rental bought at 75% to 80% leverage starts above the 70% cap. No line is possible until paydown or appreciation brings the combined ratio under it. The exact numbers vary by lender and program and follow a full review of property, leverage, and credit.

The paid-off case has a twist. On a high-value rental, the 70% math can exceed the dollar cap. Then the $500,000 maximum becomes the binding limit, not the percentage.

Does the Whole Line Count, or Just What You Draw?

The whole credit limit counts toward the CLTV test, whether or not you draw it. A lender sizing a line to 70% treats the full commitment as a lien. So a $100,000 line you plan to use only half of still consumes $100,000 of your equity room.

This matters for stacking. Say you already hold a first mortgage and a small line. Any new line has to fit under 70% after counting both. The program allows a standalone line in first or second lien position, so a HELOC can sit behind your existing mortgage or stand alone on a free-and-clear house.

What Else Moves the Number?

Your credit, debt-to-income ratio (DTI), property type, and title all shape the result. Leverage is only one gate. This is a personal, home-secured product, so it qualifies the borrower, not the rent.

Credit. The minimum on an investment line is 700. Both a 700 and a 720 profile reach the same 70% ceiling, and the same $500,000 cap. A higher score buys eligibility, not leverage. Market sources often cite 720 as typical which is a broader-market observation rather than this network’s rule.

DTI. The maximum is 50%, and a ratio above 45% requires a 680 minimum. Investment already floors at 700, so that rule never binds here. The lender reviews your file on the interest-only payment calculated on the maximum draw. That means a big line can raise your DTI even if you plan to draw lightly.

Property type. 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 zoning are not.

Title. The property must be held by you personally or by a revocable living trust. LLCs, corporations, partnerships, and irrevocable, blind, or land trusts cannot hold title. That is the sharpest structural difference from a DSCR loan. If your rental sits in an LLC, a vesting change or a DSCR cash-out is the alternative.

Rental income. A HELOC does not run on rent coverage the way a DSCR loan does. Rent may matter in how your personal finances look, but the file is sized on your credit, DTI, and equity.

How Does Valuation Work?

An investment line tops out at $500,000. Full appraisals are required only on lines above that figure, so an investment HELOC sits in the automated-valuation lane by default and commonly closes with no traditional appraisal. A higher CLTV may call for a secondary valuation. A full appraisal is also available as an option if you ask for one.

That has a practical edge. An automated model will not capture a fresh rehab. If you renovated recently, consider requesting the full appraisal, because your value may be higher than the model sees. Whether it lifts the number depends on comparable sales and underwriter review.

How Is the Line Structured After Closing?

Investment lines run a 5-year interest-only draw period, followed by a 25-year fully amortizing repayment. At least 75% of the line is drawn at closing. Pricing floats during both periods and does not convert to a fixed structure under this program. The minimum subsequent draw after closing may apply, so confirm it for your state.

Two consequences follow. First, a mostly drawn line means you carry the full balance from day one. Second, a floating structure means your monthly obligation can move. The CFPB notes that HELOCs typically carry adjustable pricing, that draw periods can last 10 years, and that a lender might stop further credit if the home’s value drops significantly. So do not count on any small undrawn portion staying available, because the bulk of the line is already in use.

Pressure-test the line before you sign. Ask what happens if the property sits vacant for a stretch while the balance stays drawn. Consider whether you could carry the repayment phase, when principal starts amortizing and the obligation steps up.

Other Limits That Catch Investors

Some rules have nothing to do with equity. Check these early.

• Exposure: a borrower is limited to three lines, and combined exposure caps at $2,000,000 on one wholesale program and $750,000 on another.
• Portfolio size: an owner of more than 15 financed properties is not eligible.
• Credit history: a bankruptcy needs 4 years of seasoning. Investment files follow a 7-year path after a foreclosure and 4 years after a deed-in-lieu, pre-foreclosure, or short sale.
• Listed properties: a property listed for sale, or listed within the past 60 days, is ineligible in Indiana, North Carolina, Pennsylvania, Tennessee, Texas, and Washington.
• Texas: investment properties are eligible as non-homestead transactions, and the primary-residence rules do not apply to them.
• Geography: 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 41-market DSCR footprint.

HELOC, Primary-Home HELOC, or DSCR Cash-Out?

If your rental has no room, or sits in an LLC, a DSCR cash-out refinance is often the practical route. The tests differ. A HELOC asks whether you can carry the debt personally. A DSCR loan asks whether the rent covers the payment. Clearing 1.00 on coverage is not the same as positive cash flow, since repairs, vacancy, and management sit outside the calculation.

Many investors use their primary residence’s equity to fund rental purchases, a different tier with a different ceiling. That puts your home at risk, so weigh it carefully.

DSCR cash-out reaches about 75% LTV across most of the network, with roughly 6 months of seasoning as the common expectation. Credit floors vary: a 620 floor exists in parts of the network, most programs want around 660, and 700+ unlocks the strongest tiers. Everything runs subject to lender guidelines. The complete DSCR loans guide covers those requirements in full.

How to Raise Your Line

You control a few levers, though not all of them.

1. Pay down the first mortgage. Every point of balance you retire becomes a point of room under the 70% cap.

2. Document appreciation. If a rehab or a rising neighborhood lifted value, request the full appraisal.

3. Fix the title. Move the property out of an LLC and into your name or a revocable trust, if that fits your overall plan.

4. Clean up credit. Reaching 700 opens the door. Going past it will not raise the ceiling.

5. Lower DTI. Retire small debts before you apply, since the lender reviews your file on the payment at the maximum draw.

Typical documents include ID, income records, bank statements, and proof of ownership and insurance. Requirements vary by program, and a trust adds its own paperwork.

Key Terms Defined

Combined loan-to-value (CLTV): all loans secured by the property, divided by its value.

HELOC: a revolving line of credit secured by property equity, with a draw period followed by repayment.

Lien position: your place in line for repayment. A first lien is paid before a second.

Automated valuation: a computer estimate of value, used in place of a full appraisal.

DSCR: a ratio of a rental’s income to its monthly debt payment, used to qualify investor loans.

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.

About Lendmire

Lendmire, NMLS# 2371349, is a mortgage brokerage that arranges home equity lines of credit through wholesale lending partners in its 16 full-service states. Lines on primary residences, second homes and investment properties are each reviewed individually by the lender under the program’s occupancy, credit and combined-loan-to-value guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. CFPB booklet – What you should know about HELOCs

2. NerdWallet – HELOC on an investment property

3. The CFPB