How Much Can You Borrow on an Investment Property HELOC for Investment Purchases?

The Quick Read: On an investment property, the network’s ceiling is 70% combined loan-to-value (CLTV), minus every lien already on the property, with a maximum line of $500,000, subject to lender guidelines and full file review. A home equity line of credit (HELOC) is a revolving credit line secured by property you own. It produces cash for a down payment, but it does not buy the next property by itself.

• Credit above 700 buys eligibility on an investment line, not extra leverage.
• Lines on primary residences can run up to $750,000 and start at $25,000, while an investment line stops at $500,000.
• Title must sit with the individual borrower or a revocable living trust, so an LLC cannot hold it.
• A primary-residence or second-home line can reach 90% CLTV, but only at a 720-or-better credit profile, and a primary-residence line above $500,000 caps at 75% CLTV.
• A separate purchase loan, often a DSCR loan, still has to close the deal.

Lendmire is a broker. It arranges these lines through select wholesale partners and never lends directly. Every figure below is a typical guideline, not a commitment to lend.

Which Property Secures the Line?

Two different products share this question, and the property that secures the line sets your ceiling. A line on a rental you already own is the “investment property HELOC.” A line on your own home, used to fund a rental purchase, follows primary-residence rules.

Those collateral differences matter beyond the math. A primary-home line puts your residence behind a rental purchase. The CFPB’s HELOC booklet describes a HELOC as revolving credit secured by your home. If the rental underperforms, the house is still on the hook.

The Sizing Formula: Value, CLTV, Liens

Your maximum line is the property’s value times the allowed CLTV, minus all existing liens. That is the same method the CFPB booklet uses: take a percentage of the home’s value, then subtract what you owe.

Work through it in four steps:

1. Establish value. On an investment line, the valuation is almost always automated. Lines cap at $500,000, and full appraisals start only above that. A borrower can still request a full appraisal.

2. Apply 70% CLTV. Multiply the value by 0.70. Investment lines are fixed at that ceiling, and a secondary valuation is not part of the investment-line sizing.

3. Subtract existing liens. The first mortgage comes off. Counting is based on the credit limit, not just what you draw.

4. Check the caps. The $500,000 maximum and the $25,000 minimum can trim the result or erase it. Anything under the minimum means no line.

Picture a rental valued at a round $400,000 with a first mortgage of about 55% of value. The formula lands at roughly 15% of value in available equity before any caps. A rental with a first mortgage at 70% of value or more produces no line at all. That is why paper equity overstates usable cash.

A line can sit in first or second lien position. Investment lines use a 5-year interest-only draw followed by a 25-year repayment period. At least 75% of the line is drawn at closing, and pricing floats through both phases.

What Moves the Number (and What Doesn’t)

Beyond the credit tiers, the lender reviews several other parts of the file. Both investment tiers, 720+ and 700+, reach the same 70% CLTV up to $500,000, and 700 is a hard floor.

What else the lender reviews:

• Debt-to-income (DTI). The maximum is 50%. The 45% cap for credit profiles from 600 to 679 applies to primary-residence lines, not investment lines, which start at 700. A ratio above 45% needs a 680 minimum. The line is qualified on the interest-only payment at the maximum draw, so a smaller draw does not shrink the test.
• Credit report. One score keyed to the primary wage earner, with a report no more than 90 days old at closing.
• Derogatory history. A bankruptcy needs 4 years of seasoning. On investment files, a foreclosure follows a 7-year path, and a deed-in-lieu, pre-foreclosure, or short sale follows a 4-year path.
• Exposure. A borrower is limited to three lines. Combined exposure caps at $2,000,000 on the higher-leverage wholesale program and $750,000 on the longer-runway program. A borrower with more than 15 financed properties is not eligible.
• Property type. Single-family, 2-4 units, PUDs, townhomes, and condos (including non-warrantable) are eligible. Manufactured homes, co-ops, condotels, log homes, commercial, mixed-use, and agricultural zoning are not offered.

Availability is narrower than the DSCR footprint. Lines are offered 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. Some states add limits, such as a CLTV cap in New Mexico and Ohio that depends on credit profile.

Using the Draw: Down Payment, Closing Costs, Reserves

HELOC cash is often accepted for a down payment and closing costs, but it is commonly excluded from reserves. The purchase lender decides what counts. Practice varies. One investor on BiggerPockets describes a lender wanting funds to sit in the bank for two months, while a lender in the same thread says the funds can go straight into a down payment.

Expect the purchase lender to ask for statements showing the draw and where the money went. Reserves are different. They are the cash left over after closing, and an undrawn line generally does not count.

Your DTI matters here too. The HELOC payment counts in your debt ratio when you qualify for the new mortgage, as BiggerPockets posters note. Borrowing the whole down payment also stacks two loans on one purchase, so your total leverage across both can end up well above what either loan allows alone. Exact terms vary by lender and program and follow a full review of property, leverage, and credit.

Stress-Test Before You Draw

The new rental has to carry its own payment plus the line’s payment. That is the real limit, more than the equity on paper. Investors on BiggerPockets say to use a HELOC for acquisition only if you can repay it within a year or two.

Run three tests before you draw:

• Full-draw test. Underwriting uses the interest-only payment at the maximum draw. Run yours the same way.
• Phase test. The 5-year interest-only draw ends and a 25-year amortizing repayment begins. The payment on the same balance steps up.
• Float test. Pricing floats and never converts to fixed. A rising payment must still leave the rental covered.

Ask what happens if the property sits vacant for a few months. A line on your primary home is the riskier version of that question.

HELOC vs. DSCR: Which Tool Fits?

A HELOC is underwritten on you. A DSCR purchase loan is reviewed primarily on property-level rental income covering the payment, subject to lender guidelines. That difference matters when your debt-to-income is high. One investor on BiggerPockets chose DSCR for the main purchase for that reason, using the line only for the 20% down payment.

On a DSCR purchase, most files land at 75%-80% LTV, so 20%-25% down. Select programs reach 85% LTV with roughly a 700+ score. Coverage of 1.00 is where many select programs start, and a separate select-lender path takes coverage below 1.00 with leverage and terms adjusted. Credit floors vary by program, and some parts of the network start as low as 620.

Keep one caution in mind. DSCR compares rent to the full payment on the loan being underwritten (principal, interest, taxes, insurance, and any HOA dues). Clearing 1.00 does not mean positive cash flow, because repairs, vacancy, and management sit outside the ratio. A HELOC on a different property is outside that ratio, though it can show up in your DTI elsewhere.

An LLC-titled property is the sharpest structural conflict. A property already deeded to an LLC needs a vesting change before it can carry this kind of line, or a DSCR cash-out instead. Cash-out refinances top out around 75% LTV, with about 6 months of seasoning common. Lendmire’s piece on HELOC rules for LLC-titled borrowers covers that case, and the complete DSCR loans guide explains the purchase side. Final terms depend on the lender’s guidelines, the property type, and the borrower’s complete credit picture.

Key Terms Defined

• CLTV (combined loan-to-value): all loans secured by the property, divided by its value.
• HELOC: a revolving credit line secured by property you own.
• Draw period: the stretch when you can borrow from the line, paying interest only.
• Repayment period: the stretch after the draw ends, when the balance amortizes.
• Reserves: cash left after closing that a lender expects you to hold.

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.

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. CFPB HELOC booklet

2. BiggerPockets: Using a HELOC to buy an investment property

3. BiggerPockets: HELOC for investment property down payment

4. BiggerPockets: Thoughts on using a HELOC from a primary home

5. BiggerPockets: Using a HELOC to purchase a first investment property