How Much Can You Borrow on an Investment Property HELOC on a $860K Rental?

The Quick Read: Usually far less than the equity alone suggests. On an investment property, the line is capped at 70% combined loan-to-value (CLTV), counted on the full credit limit and reduced by every lien already on the home. The line also tops out at $500,000, so on an $860K rental the dollar cap often binds before the percentage does. Everything below is subject to lender guidelines and full file review.

• Percentage cap: 70% CLTV on an investment property, tested on the whole line, not just the amount you draw.
• Dollar cap: $500,000 maximum, with a $25,000 minimum. Lines above $500,000 are for primary residences only.
• Credit: a 700 minimum. A 720 score reaches the same 70% ceiling, so a higher score adds eligibility, not leverage.
• Title: an individual or a revocable living trust. An LLC cannot hold title on these lines.
• Underwriting: your credit, income, and debt-to-income ratio (DTI). The rent is not the test.

How Is the Maximum Line Calculated?

The maximum is the property value times the allowed CLTV, minus every lien already recorded. Then the program’s dollar cap and your DTI can shrink the result. The smallest of those three limits is your usable line. Switchwize lays out the same formula and notes that investment-property limits run below primary-home limits.

Here is the order of operations:

1. Establish value. Lines of $500,000 or less 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.

2. Stack the liens. Add your first mortgage and any other liens, then add the full proposed line limit.

3. Apply the 70% cap. The combined total cannot pass 70% of value on an investment property.

4. Apply the $500,000 cap. No investment line goes above it.

5. Check DTI. The maximum is 50%. The lender reviews your file on the interest-only payment calculated on the maximum draw, so a large line can fail on DTI even when the equity is there.

The calculator on this page gives an illustrative estimate. It converts percentages to dollars, which is why the examples below stay in percentages of value.

What Does the Math Look Like at Different Mortgage Balances?

On an $860K value, the 70% ceiling leaves room equal to 70% of value minus what you owe. The $500,000 maximum line for an investment property equals roughly 58% of that value. That means the dollar cap binds only when your existing liens are low enough that the room under 70% CLTV exceeds 58% of value, which is when liens are under about 12% of value. Past that point, the percentage cap takes over. The table below shows the pattern as percentages of value, using modeled assumptions rather than a quote.

If the room works out below the $25,000 minimum, there is no line to offer.

Paid off does not mean unlimited. A free-and-clear $860K rental still tops out at the dollar cap. A rental bought recently with a high-leverage first mortgage can leave little room or none.

Why Does the Full Line Count, Not Just What You Draw?

The lender tests CLTV on the entire credit limit, even if you plan to borrow a fraction. A $400,000 line you never touch still counts as $400,000 of lien against the home. Interest accrues only on what you draw, as Experian explains, but the leverage test ignores that.

There is a catch on the other side. On the programs in Lendmire’s wholesale network, at least 75% of the line is drawn at closing. So the idea of opening a large line and leaving it idle does not match how these lines are structured. Pricing floats during both the draw and repayment phases, and on these programs it does not convert to a fixed structure.

Does a Higher Credit Score Raise Your Limit?

No. On an investment property, 700 is a hard floor with no tier beneath it, and both 700 and 720 reach the same 70% CLTV. A better score helps you qualify, but it does not buy more leverage on this collateral.

Primary residences are different. The network’s ceiling there reaches 90% CLTV, and only at a 720-or-better credit profile. Market surveys report a similar gap: Switchwize puts investment-property CLTV at 70% to 75% versus 80% to 85% for primary homes. The network’s investment ceiling is 70%, with no tier above it.

Who Gets Underwritten: You or the Rental?

You do. A HELOC looks at your credit, your income, your DTI, and the debt already attached to the property. Rent does not raise the line. This is the key contrast with a DSCR loan, which tests whether the property’s rent covers its payment.

DSCR stands for debt service coverage ratio. It divides the monthly rent by PITIA, which is principal, interest, taxes, insurance, and any association dues. A DSCR loan is reviewed primarily on property-level rental income covering the payment, subject to lender guidelines. Clearing the ratio is not the same as positive cash flow, because repairs, vacancy, management, and capital expenses sit outside it.

The bigger practical point is that a HELOC adds a new payment to your personal DTI. That can crowd out the next purchase, the exact opposite of what many investors hope the line will do.

Which Property and Title Rules Can Knock You Out?

Several structural rules can end the conversation before any math starts.

• Title. Fee simple or leasehold held by you individually or by a revocable living trust. LLCs, corporations, partnerships, and irrevocable, blind, or land trusts cannot hold title. If your rental already sits in an LLC, you would need a vesting change or a different product. A DSCR cash-out can close in an LLC, subject to program terms.
• Property type. Single-family, 2-4 units, townhomes, PUDs, and condos, including non-warrantable condos, are eligible. Manufactured homes, co-ops, condotels, log homes, commercial, mixed-use, and agricultural zoning are not offered.
• Exposure. A borrower is limited to three lines. The investment line itself tops out at $500,000, and combined exposure across lines caps at $750,000 on the longer-runway program and $2,000,000 on the higher-leverage program. Owning more than 15 financed properties makes you ineligible.
• 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.
• Lien position. The line can sit in first or second position.
• Where it is available. The equity-line product is offered only in Lendmire’s 16 full-service states. That is narrower than the 41-market DSCR footprint, which covers 40 states plus Washington, D.C.

How Does the Draw and Repayment Work?

Investment lines run a 5-year interest-only draw period followed by a 25-year fully amortizing repayment period. The CFPB describes a HELOC as an open-end line of credit. You can borrow repeatedly up to the limit during the draw period, then you stop borrowing and start repaying. The CFPB also warns that payments can jump when repayment starts, and that some lines call for a balloon payment.

That payment jump matters on a rental. Interest-only payments feel light for years. Then the principal kicks in, and if the line funded something that does not produce income, your cash flow takes the hit.

The rental is also the collateral. A default can mean foreclosure on that property, as Experian notes in its discussion of investment-property lines. Lenders can also freeze or reduce a line if value or credit deteriorates, so treat the line as available liquidity, not guaranteed liquidity.

HELOC, DSCR Cash-Out, or a Line on Your Own Home?

If the HELOC math returns too little, two other routes are worth comparing. A primary-home line borrows against a different property, and a DSCR cash-out refinances the rental itself.

A DSCR cash-out reaches about 75% on standard rentals, with roughly 6 months of seasoning as the common expectation. LLC titling is possible there, subject to lender program eligibility. It replaces your existing first mortgage, which matters if your current loan is one you want to keep.

The two products suit different goals. A HELOC works when you want revolving access, a modest balance, and an existing first mortgage you like. A cash-out suits larger pulls, LLC-held rentals, or investors whose personal DTI is already stretched. Lendmire’s complete DSCR loans guide explains the rent-based side in full.

What Are the Common Mistakes?

Investors tend to run into the same assumptions. Each one fails on the mechanics above.

• Assuming primary-home leverage. The investment ceiling is 70% CLTV, not the 90% a primary residence can reach only with a 720-or-better credit profile.
• Treating equity as cash. Equity is the value minus what you owe. The caps decide what you can reach.
• Counting only the draw. CLTV tests the full limit.
• Expecting rent to raise the line. The line is underwritten on you.
• Forgetting the title. An LLC deed is a stop sign for this product.
• Ignoring the payment reset. The repayment phase changes the monthly picture.

Funds from these lines are often used for improvements or purchases, so confirm with a tax professional how your intended use of the money affects your own return before you draw.

Key Terms Defined

CLTV (combined loan-to-value): Total of all liens, including the full new line, divided by the property’s value.

Lien: A legal claim against the property, such as a mortgage or an equity line, that must be paid before a sale clears.

Draw period: The stretch when you can borrow from the line, which is interest-only on investment lines here.

Repayment period: The later phase when borrowing stops and principal and interest are due.

Automated valuation: A model-based estimate of value used in place of a traditional appraisal on smaller lines.

DTI (debt-to-income ratio): Your monthly debt payments divided by your monthly income.

PITIA: Principal, interest, taxes, insurance, and association dues, the monthly obligation a DSCR loan tests rent against.

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. Switchwize – HELOC on an investment property

2. Experian – Draw period

3. CFPB

4. Experian – HELOC on investment property