How Much Can You Borrow on an Investment Property HELOC to Buy Investment House?

The Quick Read: The limit is a formula: the lender’s maximum combined loan-to-value (CLTV) applied to the property’s value, minus what you already owe, then capped at the program’s dollar maximum. On an investment property in Lendmire’s wholesale network, the ceiling is 70% CLTV with a $500,000 maximum line, subject to lender guidelines.

• A line secured by a rental tops out at 70% CLTV; a primary-residence line reaches 90% CLTV only at a 720-or-better credit profile.
• Investment lines require a 700 minimum credit score, and 700 and 720 both reach the same 70% ceiling.
• The line pays out cash from existing equity. That cash becomes your down payment, closing costs, or rehab money.
• The purchase loan is a separate approval, and the line’s payment is yours to carry.
• Lines are available only in Lendmire’s 16 full-service states, a narrower footprint than the DSCR loan market.

How Is the Maximum Line Calculated?

Take the property value, multiply by the CLTV ceiling, and subtract every mortgage already on the property. The result is the most the lender can offer on equity. Then the program’s dollar cap applies, and the smaller number wins.

Combined loan-to-value counts the first mortgage plus the full new line limit, not just the amount you draw. That is why a line you never touch still uses up leverage.

The federal consumer-finance regulator’s HELOC booklet walks through the same logic with a $100,000 appraised value and a $35,000 potential line. It adds that lenders weigh your repayment-capacity and your credit history, so equity alone does not set the limit.

Here is the formula run on a modeled rental. Assume a property valued at $400,000 with a first mortgage equal to 40% of value. At the 70% investment ceiling, combined debt can reach 70% of value, so the line can use the remaining 30% of value. That sits under the $500,000 cap, so equity is the binding limit. The calculator on this page can convert those percentages into dollars as an illustrative estimate.

Now flip it. Assume a rental valued well above $1,000,000 and owned free and clear. Seventy percent of value would exceed $500,000, so the dollar cap binds and the extra equity goes unused. On higher-value rentals, the cap sets the limit, not the equity.

Why Can’t You Borrow 100% of the Equity?

Lenders hold back a cushion so the property stays well protected if values fall. On an investment property that cushion is larger than on a primary home. The 70% CLTV ceiling means at least 30% of value stays unborrowed.

Where this network draws the line depends on occupancy:

Above $500,000, a line is available on primary residences only. It requires a 700-or-better credit profile (720 on the longer-runway structure), caps at 75% CLTV, and needs a full appraisal. None of that applies to a rental.

Market surveys report investment-property CLTV caps in a 70% to 80% band across lenders, per Refi.com’s investment HELOC explainer. The network figure for an investment property is 70%, and that is the number to plan around.

Can a HELOC Buy the House Directly?

Not directly. A HELOC is a revolving line secured by a property you already own. You draw cash against it, move that cash to your own account, and use it on the new purchase.

Investors typically use the draw for the down payment, closing costs, and any rehab budget. BiggerPockets investors describe this pattern, pulling from the line and putting the money toward the down payment. The new house is then financed with its own loan, usually a DSCR loan or a conventional mortgage secured by the new property.

That means two separate approvals. The line is underwritten on the property that secures it. The purchase loan is underwritten on the property being bought. One does not guarantee the other.

Which Property Should Secure the Line?

You can secure the line on your primary residence, a second home, or an existing rental. The choice changes your numbers.

A primary-residence line can reach a higher CLTV, up to 90% at a 720-or-better credit profile. It also allows lines above $500,000, up to the $750,000 maximum. The tradeoff is that your home now backs the debt. The CFPB booklet above is plain about this: the line is secured by your property, and default can put it at risk.

A line on an existing rental is capped at 70% CLTV and $500,000. It keeps your home out of the collateral, but a recently purchased rental usually has little equity to tap.

Title matters too. On this network’s lines, the property must be held by you as an individual or in a revocable living trust. LLCs, corporations, partnerships, and irrevocable, blind, or land trusts cannot hold title. That is a sharp contrast with DSCR loans, where entity vesting is common, subject to lender program eligibility. A rental already deeded to an LLC needs a vesting change first, or a DSCR cash-out refinance instead.

What Does an Investment-Property Line Look Like?

Investment lines follow a single structure on this network: a 5-year interest-only draw period, then a 25-year fully amortizing repayment period. At least 75% of the line is drawn at closing. Pricing floats through both periods and never converts to fixed.

Other points that shape the size and the file:

• Line size: $25,000 to $750,000 overall, with a $10,000 floor in Michigan. Rentals stop at $500,000.
• Valuation: Because an investment line cannot exceed $500,000, it generally runs on an automated valuation with no traditional appraisal. A borrower can still request a full appraisal.
• DTI: Maximum 50%, qualified on the interest-only payment calculated on the maximum draw. That is stricter in practice than it sounds, because the qualifying payment assumes you borrowed the whole line.
• Credit: 700 minimum on investment. Reports can be no more than 90 days old at closing.
• Property types: Single-family, 2-4 units, PUDs, townhomes, and condos, including non-warrantable condos. Manufactured homes, co-ops, condotels, log homes, commercial, mixed-use, and agricultural zoning are not offered.
• Borrower limits: Up to three lines per borrower, and a borrower owning more than 15 financed properties is not eligible.
• After closing: Later draws carry a $1,000 minimum, except Texas at $4,000.

Derogatory history follows a seasoning path. A bankruptcy needs 4 years from discharge or dismissal. A foreclosure seasons at 7 years, and a deed-in-lieu, pre-foreclosure, or short sale at 4.

Is It Qualified on Rent or on Your Income?

Your income and debts, not the rent. That separates this product from a DSCR loan.

A DSCR purchase loan is reviewed primarily on property-level rental income covering the payment, subject to lender guidelines. The HELOC looks at your personal debt-to-income. Every dollar of line payment you add can push your ratio up, and the line counts at its full-draw interest-only payment.

Keep one thing in mind when you pair the two. DSCR compares rent to principal, interest, taxes, insurance, and any HOA dues on the new property only. Clearing 1.00x there does not mean the deal produces positive cash flow, because repairs, vacancy, management, utilities, and capital expenses sit outside the calculation. And the line’s payment sits outside it too, paid from your own pocket while the new rent covers the new loan.

Across the wholesale network, a 1.00 coverage ratio is where select DSCR programs start, and stronger ratios open better pricing and leverage. A separate select-lender path takes coverage below 1.00, with leverage and terms adjusted. For the full picture on these loans, see the complete DSCR loans guide.

Sizing the Line Backward From the Purchase

Start with the house, not the line. Add up what the purchase loan will not cover.

1. Down payment. On most DSCR purchases, leverage lands at 75% to 80% LTV, so expect roughly 20% to 25% down. Select programs reach 85% LTV at about a 700 score or better.

2. Closing costs. Budget these separately from the down payment.

3. Rehab money. If the plan includes work, add it now.

4. Reserves. DSCR reserves vary by lender, leverage, loan size, and transaction type. They commonly run around 6 months of PITIA, with some conservative files seeing them waived and larger loans stepping up to around 9 months.

Total those four items, then check the sum against the line limit from the formula above. If the sum is bigger than the line, the gap closes with cash, a smaller purchase, or a different source of funds.

One catch deserves attention. Programs differ on whether borrowed funds count toward the down payment, closing costs, or reserves. Many accept them toward the down payment and exclude them from reserves, but that varies by program. Ask the purchase lender before you draw. A fully borrowed down payment can fail on its own, since some programs cap the borrowed share or want part of the cash to be yours.

Also plan for documentation. The purchase lender will want to trace the draw from the line into your account and into the transaction. Keep statements that show the draw and the transfer.

The Variable-Rate Problem

Draws on the line carry a floating rate through both the interest-only and repayment periods. The CFPB’s HELOC overview says these lines usually carry variable rates, so payments can change from month to month. It also notes that some plans have minimum draw amounts and that a draw period can last up to 10 years.

On this network’s investment lines, the structure never converts to fixed. So the line works best as a bridge, not permanent financing. A common pattern is the BRRRR sequence: draw, buy, rehab, rent, refinance, then repay the line so the capacity can be reused. A BiggerPockets thread on using a HELOC to buy another rental advises against staying in the line long term because a variable payment can distort your numbers.

Stress-test the plan before you draw. Check what the new property’s payment looks like with a vacancy. Then check what the line’s payment looks like once repayment starts and the balance begins amortizing over 25 years. A plan that only works while the line is interest-only is a plan with an expiration date.

How Do the Options Compare?

The HELOC is one of several ways to put equity to work. Each has a different collateral, qualification test, and structure.

A DSCR cash-out refinance tops out around 75% LTV across most of the network, with about 6 months of seasoning as the common expectation. Compared with the 70% CLTV on a rental HELOC, it can free more equity and works for a property held in an LLC, subject to program terms. The tradeoff is that it replaces your existing first mortgage instead of sitting behind it. A BiggerPockets discussion makes the same point, with one poster recommending a cash-out refinance because the HELOC terms may be worse.

What Trips Up These Files?

These are the points where the mechanics catch investors off guard.

• Credit utilization. A fully drawn line can look like a maxed credit card on your report. Draw only what the purchase requires.
• Title. A rental held in an LLC is ineligible for the line without a vesting change.
• Listed properties. A property listed for sale, or listed within the past 60 days, is ineligible in NC, PA, TN, TX, and WA.
• Texas. A Texas primary residence is a homestead and caps at 80% combined loan-to-value. Second homes and investment properties are eligible as non-homestead transactions, and Texas properties are limited to 10 acres.
• New Mexico and Ohio. The CLTV cap depends on the credit profile.
• Thin equity on a recent purchase. A newly bought rental often has little room under a 70% ceiling.

Tax treatment can depend on how the funds are used and how the property is held. Keep clear records of where each draw went, and speak with a qualified tax professional before relying on any deduction, including those for rental expenses.

Key Terms Defined

Combined loan-to-value (CLTV): Total debt secured by the property, including the full line limit, divided by its value.

Draw period: The stretch in which you can borrow against the line, which on an investment line is 5 years of interest-only payments.

Repayment period: The stretch after the draw ends, where the balance amortizes. On an investment line it runs 25 years.

DSCR: Monthly rent divided by the monthly PITIA on the property being financed.

Seasoning: The required time between a purchase or event and when a new loan or cash-out is available.

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 is a broker that arranges financing through select lenders in its wholesale network, and all figures here are subject to lender guidelines and full file review.

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 – What You Should Know About HELOCs booklet

2. Refi.com’s investment HELOC explainer

3. BiggerPockets – Using a HELOC to buy an investment property

4. CFPB’s HELOC overview

5. BiggerPockets – Using a HELOC to buy another investment property

6. BiggerPockets discussion