How a Lender Counts an Open HELOC Payment on a Conventional Loan

The Quick Read: An open HELOC does not disqualify you, but the lender must decide what monthly payment to count against your income. If the line carries a required payment, that payment goes into your debts. If it has no payment and no balance, Fannie Mae counts nothing, while Freddie Mac steps in with an imputed payment only when a balance exists and no payment is documented. Separately, the full credit limit, drawn or not, counts toward your combined leverage on the property it secures.

A HELOC is a home equity line of credit. It works like a credit card secured by your house. You borrow against it as needed, and the payment moves with the balance.

The Three Questions a Lender Asks

Lenders sort every open HELOC with three questions. Is there a balance? Is there a required payment? Does the credit report show that payment? The answers decide which rule applies.

Across the wholesale programs Lendmire places files with, the first step is always the same: the file needs the line disclosed. Freddie Mac requires every liability to be reflected on the application and considered in qualifying, per Section 5401.2 of its Guide. Lenders then check the credit report, the application and other file documents. A HELOC missing from the credit report still gets documented if the lender finds it.

The usual mistake is leaving a line off the application because it sits at zero. Skip that habit. It will surface in the file one way or another, and an undisclosed line creates more trouble than a disclosed one.

How Fannie Mae Counts the Payment

Fannie Mae counts a HELOC payment when the loan has one. Its rule on monthly debt obligations says a principal-and-interest or interest-only HELOC payment must be included in your recurring monthly debts. If the line requires no payment, there is no recurring obligation, and the lender does not need to build an equivalent payment.

Two details matter here.

First, the wording is “does not require a payment.” An interest-only line still requires a payment. It counts.

Second, Fannie Mae’s rule uses 5% of the balance when a revolving account shows no minimum payment and nothing documents a lower one. That rule sits under a separate heading from the HELOC paragraph. A HELOC does not get a percentage of its credit limit counted as debt.

How Freddie Mac Counts It

Freddie Mac includes the payment whenever a balance is outstanding. Per its Guide Section 5401.2, if the credit report shows no HELOC payment and the file documents none, 1.5% of the outstanding balance is treated as the monthly payment.

So the two investors split on one narrow point: a drawn line with no documented payment. Fannie Mae’s rule turns on whether a payment is required. Freddie Mac’s turns on whether a balance exists. A line at zero balance triggers no imputed payment under Freddie Mac’s rule either, since the trigger is the balance.

Most loans run through automated underwriting, where the system assesses the ratios from the data submitted. Loans underwritten by hand face firmer limits. Under Freddie Mac’s guide, a monthly debt-to-income ratio above 45% makes a manually underwritten loan ineligible for sale to Freddie Mac, and the guideline is 36% or less. The wholesale conventional programs Lendmire works with run a 50% total ratio ceiling on automated findings, subject to lender guidelines and full file review.

Zero Balance: Does It Matter?

Yes, but not in your monthly payment. A line at zero with no required payment adds no debt payment under either investor’s rule. It can still matter in the leverage test, covered next.

Think of two separate tests running on the same file:

• The debt test asks whether you can afford your monthly obligations. An undrawn line with no payment usually adds nothing.
• The leverage test asks how much total debt sits against the home’s value. An undrawn line adds its full limit.

Many online explanations blur these. Keep them apart and the rest of the topic gets easier.

Open HELOC and Combined Leverage

An open HELOC raises your combined leverage even if you never borrow a dollar. Fannie Mae’s HCLTV rule uses the original first-mortgage amount, the full amount of any HELOC whether drawn or not, and the unpaid balance of closed-end second loans. The lender must determine each HELOC’s maximum credit line. If the second lien is not on the credit report, the lender must get documentation from you or the creditor.

HCLTV stands for home equity combined loan-to-value. It adds your first mortgage and the full HELOC limit, then divides by the home’s value. On a purchase, the lower of the price and the appraised value is the denominator.

Here is a plain picture. Say you buy a home with 5% down on a standard purchase. You also keep a large, mostly unused HELOC on a home you already own. That line is secured by a different property, so it does not count against the new home’s leverage. Its payment, if one is required, still counts in your debts. The leverage test applies only to liens on the home being financed. Every figure here varies by lender and program, since guidelines, property type, leverage, and credit profile all apply.

When a HELOC sits on the home you are financing, the Fannie Mae Eligibility Matrix sets maximum LTV, CLTV and HCLTV limits by occupancy, units, transaction type and credit score. The matrix also carries special leverage rules for non-occupant borrowers. The program envelope Lendmire works in on a principal residence is 97% for a first-time buyer with a fixed rate and 95% otherwise, and a large open HELOC counted at its full limit can crowd that room.

Interest-Only Draw Periods and Repayment Periods

A qualifying payment can look gentler than what you will eventually owe. The CFPB notes that many HELOCs have minimum payments based on the current balance, and most have a variable rate, so the payment may change from month to month. When the draw period ends, the repayment period begins, and monthly payments are often significantly higher.

Fannie Mae’s subordinate financing rule exempts HELOCs from the requirement that variable-rate second loans keep a constant payment for each 12 months. The payment can move.

What does this mean for you? The lender counts the payment as the file shows it today. You live with whatever it becomes. If your line is close to the end of its draw period, ask the HELOC lender what the repayment payment would be, and judge your budget by that number, not just the one the underwriter used.

A Worked Example: One Borrower, Three States

Take one hypothetical borrower with steady income and a standard conventional purchase. Use the same debts each time except the HELOC.

1. Line at zero, no required payment. The HELOC adds nothing to monthly debts. Your ratio is the same as if the line did not exist. Leverage still counts the full limit if the line is on the subject property.

2. Line drawn, interest-only payment. The interest-only payment is counted. Your ratio rises by that amount divided by your monthly income, and buying power drops.

3. Line drawn, no payment on the credit report. Fannie Mae asks whether the line requires a payment. Freddie Mac imputes 1.5% of the balance when the file documents none. Same borrower, different treatment.

The takeaway: the HELOC statement and agreement matter more than a guess. Lenders typically use the statement or credit report to document the payment, and when the two disagree, the documented terms of the line carry the argument.

Drawing on the Line Before or During the Purchase

Pulling money from a HELOC to fund a down payment creates a balance, and a balance creates a payment that counts. The draw also leaves a paper trail the lender will want to see: statements showing the draw and where the money went. A 5% down payment funded from borrowed money still has to fit the debt ratio with the new payment included. Final terms depend on lender guidelines, property type, leverage, and the borrower’s complete credit picture.

The order of events matters. A draw taken before applying shows up in your ratios from day one. A draw taken after underwriting begins still has to be disclosed, because the lender evaluates the file as it stands at closing.

Lien Priority and Subordination

The HELOC may stay in place if it is recorded and clearly subordinate to the new first mortgage, per Fannie Mae’s subordinate financing rule. The lender must disclose the subordinate financing and its repayment terms to Fannie Mae, the appraiser and the mortgage insurer.

On a refinance, an existing HELOC lender may need to agree to stay behind the new loan. If the HELOC lender will not subordinate, a payoff and closure may be needed. This is common practice, and it adds steps.

Purchase Versus Refinance

On a purchase, the question is mostly about payment and leverage. On a refinance, the HELOC can change the type of loan.

Fannie Mae’s limited cash-out refinance rule allows only subordinate liens used to purchase the property to be paid off and included. A HELOC opened later for improvements or debt consolidation generally pushes the loan into cash-out territory. Cash-out refinances carry tighter leverage: 80% LTV on a one-unit principal residence in the programs Lendmire places. Whether paying off the line triggers that classification depends on the line’s history, so ask before you assume.

Closing a HELOC at the table is not the same as paying it off through the loan. Paying it off through a refinance can change the transaction type.

What to Gather Before You Apply

• The most recent HELOC statement showing the balance, limit and payment.
• The HELOC agreement, so the lender can see whether payments are interest-only or amortizing, and when the draw period ends.
• A written statement from the HELOC lender if the credit report does not show the payment.
• Proof of a zero balance if you plan to argue that no payment applies.
• A plan for subordination, if the line will stay open on the home you are financing.

Common Mistakes

• Assuming an open HELOC disqualifies you. Both investors buy first mortgages with subordinate financing when it is recorded and subordinate.
• Thinking only the drawn balance matters. For combined leverage, the full limit counts.
• Treating a zero balance as invisible. It adds no payment, but it still counts in HCLTV when the line is on the home being financed.
• Assuming interest-only means uncounted. Fannie Mae’s rule counts it.
• Assuming the two investors treat it the same. They do not, on a drawn line with no documented payment.
• Leaving the line off the application. Disclosure is required.

Key Terms Defined

HELOC: A revolving line of credit secured by your home, with a draw period followed by a repayment period.

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

HCLTV: Your first mortgage plus the full limit of any HELOC, divided by the home’s value.

Subordination: An agreement that keeps the HELOC behind the new first mortgage in lien order.

Draw period: The early stretch when you can borrow from the line, often with interest-only payments.

Imputed payment: A payment the lender assigns when none is documented, such as 1.5% of the balance under Freddie Mac’s rule.

Where to Go From Here

If you are buying a home and want to see whether a conventional loan fits your file, Lendmire can help you compare the options and what each one asks of the file. Lendmire is a mortgage broker, and it arranges conventional loan programs through wholesale lenders, so the HELOC question gets sorted before the file goes in, not after. Every program figure here is subject to lender guidelines and full file review, and nothing in this piece is a commitment to lend.

For your own numbers, request a scenario review with Lendmire.

About Lendmire

Lendmire (NMLS# 2371349) is a mortgage broker licensed for consumer lending in 16 states. Lendmire arranges FHA, VA, conventional and jumbo purchase and refinance loans through wholesale lenders; every file is underwritten by the lender under the applicable program guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. Freddie Mac Guide Section 5401.2

2. Fannie Mae Selling Guide B3-6-05, Monthly Debt Obligations

3. Fannie Mae Selling Guide B2-1.2-03, HCLTV Ratios

4. Fannie Mae Eligibility Matrix

5. CFPB

6. Fannie Mae Selling Guide B2-1.2-04, Subordinate Financing

7. Fannie Mae Selling Guide B2-1.3-02 Limited Cash-Out Refinance