How an Investment Property HELOC Works on an Offer Letter

The Quick Read: An investment property HELOC supports an offer only after the line is approved, drawn, and sitting in the buyer’s own bank account, because sellers read drawn cash as proof of funds, while a purchase lender separately decides whether borrowed money counts toward the down payment, so the line and the purchase are two approvals that meet at the offer.

• An approved but undrawn line is permission to borrow, not funds.
• On Lendmire’s wholesale network, an investment-property line tops out at 70% CLTV and $500,000, with a 700 minimum credit score.
• Borrowed funds are commonly accepted for down payment and closing costs, but often excluded from reserves.
• LLC-held rentals cannot hold title on these lines, so entity ownership needs planning before the offer.
• The HELOC payment generally sits outside the new property’s DSCR calculation, though the investor still owes it every month.

What Does “Offer Letter” Mean Here?

The phrase covers two different documents, and the mechanics differ for each.

The seller-facing letter. This is the proof-of-funds or pre-approval letter attached to an offer. The seller and listing agent want evidence that the buyer can close. They care about three things: the amount, the name, and whether the money exists today.

The financed-purchase offer. Here the HELOC draw becomes the down payment and closing-cost money, and a separate purchase loan, usually a DSCR loan, covers the rest. The purchase lender decides how that borrowed money is treated.

The same HELOC can serve either letter. But neither lender treats the other’s approval as final, so each reviews the file on its own terms.

How Underwriting Treats It, Step by Step

The sequence matters more than any single number. Run it in this order.

1. Pick the collateral. The line sits on a rental the investor already owns, or on a primary residence. A line on the property being bought cannot fund its own down payment, because the borrower has to own it first.

2. Get the line approved. On Lendmire’s network, an investment-property line is underwritten on the borrower’s credit, existing equity, and debt-to-income, with a 700 minimum score. A line is available in the first or second lien position, so a rental with an existing mortgage can still qualify if combined leverage fits.

3. Draw the cash. On this network, at least 75% of the line is drawn at closing, so the line should be sized with that initial draw in mind. After that, the draw period runs five years interest-only, followed by a 25-year repayment period, and pricing floats throughout. The investor then moves the money into a bank account in the buyer’s name.

4. Build the offer package. For a cash offer, attach a bank statement or a bank-issued funds letter showing the balance. For a financed offer, attach the purchase lender’s pre-approval, and the drawn funds are the down payment.

5. Purchase-lender review. The lender tests the new property’s rent against its own payment. It also reviews source-of-funds paperwork: the HELOC closing documents, the draw confirmation, and the bank statements showing the deposit.

6. Match the names. The buyer on the offer, the account holder, and the contract party should be the same person or entity. A business account is fine when the offer is in the business name. A personal offer funded from a business account creates a mismatch that sellers and escrow flag.

The Clever Real Estate proof-of-funds guide says a line of credit secured by an asset the buyer owns is generally accepted when the line is documented as secured and available. It also says equity in another property is not accepted until it has been borrowed against. That matches how files read in practice: equity is potential, a draw is cash.

Why an Approval Letter Is Not Proof of Funds

An open line looks like money, but a seller cannot close on it. The line becomes proof of funds when the draw lands in an account. A contract can add flexibility: one poster on a Bogleheads proof-of-funds thread notes that a statement of qualification does not have to say whether the funds are cash, a HELOC, or a loan, and the thread describes a clause giving the buyer a short window after signing to supply a funds letter. That is one buyer’s contract, not a rule, so any such window should be written into the contract itself.

The practical habit is simple. Draw first, document the deposit, then write the offer to the amount the statement supports.

How the Purchase Lender Treats HELOC Money

Across the wholesale network’s DSCR lenders, treatment of borrowed down-payment funds is program-specific. Some programs accept documented borrowed funds. Some cap the borrowed share. Some require part of the down payment to come from the borrower’s own seasoned funds. A few overlays are stricter still.

Three buckets matter, and they are tested separately.

• Down payment. Most DSCR purchases run 75%-80% LTV, so 20%-25% down. Select high-leverage programs reach 85% LTV with roughly a 700+ score. Borrowed funds are often allowed here, subject to the program.
• Closing costs. Usually treated like the down payment.
• Reserves. Commonly around 6 months of PITIA, varying by lender, leverage, loan size, and transaction type. Borrowed money frequently cannot satisfy this bucket.

A HELOC-funded purchase also means the buyer is financing close to the full price across two liens on two properties. The DSCR math sees only the new property: rent against its own PITIA. Clearing 1.00 means rent covers that payment. It does not mean positive cash flow, since repairs, vacancy, management, utilities, and capex sit outside the calculation. And the HELOC payment generally falls outside the new property’s coverage ratio, but some purchase programs count it in the borrower’s DTI instead. Confirm which test applies before the line is drawn.

To see how the purchase loan itself is built, read the complete DSCR loans guide.

Structures That Exist

Cash-style offer with a drawn line. The line must cover the full price plus closing costs. With an investment line capped at $500,000 on this network, that limits the price range, so this works for lower-priced properties or for investors adding a second source of funds.

Financed offer with a HELOC down payment. The line is sized to the down payment and closing costs, not to the maximum equity available. This is the more common fit, because the purchase loan carries most of the price.

Bridge-and-refinance. The HELOC buys the property outright, and a later DSCR cash-out refinance repays the line. Cash-out refinances top out around 75% LTV across most of the network, and about 6 months of seasoning is the common expectation. This structure fails when the refinance appraisal comes in light or when the cash is not in hand at the offer deadline. Terms vary by lender guidelines, property type, leverage, credit profile, and full file review.

Primary-residence line instead of a rental line. Primary-residence and second-home lines on this network can reach higher CLTV at stronger credit, but that ceiling does not apply to an investment line. Using the home as collateral puts the home at risk if repayment slips.

Where the General Rule Breaks

Undrawn lines. Covered above: only drawn money counts.

Primary-residence terms. Standard consumer HELOCs are written for owner-occupied homes. The CFPB’s HELOC booklet warns that renting the home out to other people may be prohibited under the terms of the line. A borrower who plans to convert the home into a rental should read the line agreement first.

Entity ownership. The investment line on this network requires title held by the individual borrower or a revocable living trust. LLCs, corporations, partnerships, and irrevocable or land trusts cannot hold title. A rental already deeded to an LLC needs a vesting change or a DSCR cash-out refinance instead. This is the sharpest structural difference from a DSCR loan, which can be made to an LLC, subject to lender program eligibility.

Property type. The line covers single-family, 2-4 unit, PUD, townhome, and condominium collateral. Manufactured homes, co-ops, condotels, log homes, and commercial or mixed-use properties are not eligible.

Exposure and availability. A borrower is limited to three lines, and one with more than 15 financed properties is not eligible. The equity-line programs are available only in Lendmire’s 16 full-service states, which is narrower than its 41-market DSCR footprint.

Credit history. A bankruptcy needs 4 years of seasoning. On investment files, foreclosure history follows a 7-year path, and a deed-in-lieu, pre-foreclosure, or short sale follows a 4-year path.

Sale of the collateral. The CFPB booklet says the line generally has to be paid in full when the home is sold. A rental sale triggers the same payoff.

Naming. Some lenders decline a request for a HELOC on a rental but offer a similar product under another name. Ask for a line of credit secured by investment property.

Key Terms Defined

HELOC: An open-end credit line secured by a property, which the borrower can draw on repeatedly during a draw period and repay afterward.

CLTV: Combined loan-to-value, which adds every lien on the property and divides by its value.

Proof of funds: Documentation, usually a bank statement or funds letter, showing the buyer holds the money needed to close.

Draw period: The stretch when the borrower can take money from the line; on an investment line here, five years interest-only.

Seasoning: The length of time funds or ownership must be documented before a lender counts them.

Source-of-funds review: The purchase lender’s check of where the down payment came from.

The CFPB’s plain-language explainer describes the open-end structure, the draw period, and the repayment period that follows, and says a borrower who falls behind could lose the home. On a rental-secured line, the rental is the property at risk.

The Investor Decision in Practice

Start with the question the offer letter forces: where does the money come from, and who else reviews it?

An investment line on this network holds to 70% CLTV, and a standard DSCR cash-out holds to about 75% LTV. The two numbers are separate tests on separate products. A rental with thin equity may clear neither, and a rental held in an LLC may clear only the DSCR path. Exact terms depend on the lender’s guidelines, property type, leverage, and a full review of the borrower’s file.

Size the line to the job. Funding a down payment and closing costs needs a modest draw. Funding an entire purchase needs a large line, a larger payment, and more exposure. Sellers do not care how the money is structured, but the borrower carries it either way.

Consider an investor with a paid-down rental, a 720 score, and a target property priced in the mid-six figures. The line can cover the down payment on a purchase at 75% LTV. If the new rental runs near 1.0x with a thin margin, the HELOC payment lands on the investor’s other income. If it runs closer to 1.2x, there is more room. Coverage below 1.00 is available through select lenders in the network, with leverage and terms adjusted. Every figure here varies by lender and program — guidelines, property type, leverage, and credit profile all apply.

A larger draw lowers the new loan’s payment and can lift its DSCR, but it never erases leverage caps, credit floors, reserve rules, or property eligibility. The strongest files clear both tests: enough equity and enough rental coverage.

When This Is the Wrong Tool

A HELOC is a poor match when the property will be held in an LLC, when the investor needs reserves from borrowed funds, or when the draw cannot be documented before the offer deadline. It is also the wrong fit for permanent financing: the line floats and never converts to fixed. In those cases, a DSCR cash-out refinance on the existing rental, or a larger own-funds down payment, usually reads cleaner.

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. Every figure above is subject to lender guidelines and full file review, and nothing here is a commitment to lend.

About Lendmire

Lendmire — NMLS# 2371349 — is a mortgage broker that arranges home equity lines of credit in its 16 full-service states through wholesale lenders, on primary residences, second homes and investment properties. Every line is subject to the lender’s guidelines and full underwriting. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. Clever Real Estate – Proof of funds letter

2. Bogleheads – Proof of funds to offer in cash

3. CFPB – HELOC consumer booklet

4. CFPB’s plain-language explainer