What Is 1099-NEC Box 6 Payer’s State Number? Finding and Fixing

Box 6 of Form 1099-NEC is where the payer enters its state tax identification number along with the two-letter abbreviation for the state. That ID is assigned by the state’s tax or revenue agency and is separate from the federal Employer Identification Number shown elsewhere on the form. The state uses it to match the income and any withholding reported on the 1099-NEC to the correct business under its own tax system.¹

What Number Goes in Box 6

The number belongs to the payer, not the contractor. Depending on the state, it may be called a state withholding number, a state account number, or a state tax ID. The format and length vary from state to state.

A handful of states that do not issue a separate withholding number may allow or require the federal EIN in Box 6 instead, but that is the exception. In most states, the state ID is a distinct number issued when the business first registered with the state tax or revenue agency.

Box 6 also includes the state’s postal abbreviation. The form has room for two states, split by a dashed line through Boxes 5, 6, and 7, so a payer who withheld tax for two different states enters each state’s abbreviation and ID on its own side.¹ If three or more states are involved, the payer files an additional 1099-NEC to cover the rest.

Why Box 6 Exists: Its Role Alongside Boxes 5 and 7

Boxes 5, 6, and 7 form a self-contained state reporting section:

Box 5 reports any state income tax the payer withheld from the contractor’s payments.
Box 6 reports the state abbreviation and the payer’s state ID.
Box 7 reports the amount of non-employee compensation subject to that state’s tax.

The IRS treats these three boxes as optional for federal purposes. Its instructions say they “are provided for your convenience only and need not be completed for the IRS.”¹ That does not make them optional at the state level. Many state revenue agencies require the information, and Box 6 is the piece that ties the other two together. Without a valid state ID, the state has no reliable way to match the withholding in Box 5 or the income in Box 7 to the payer, and a contractor claiming a withholding credit on a state return may see that credit held up.

Where Payers Find Their State ID Number

A business’s state tax ID typically appears on the registration documents issued when the business first registered with the state tax or revenue agency. It also shows up on state-issued withholding tax coupons and is usually accessible through the business’s online account on the state tax portal.

If you cannot locate the number, contact the state’s department of revenue directly. Using the wrong number, or one that belongs to a different state, can cause the filing to be rejected. Maryland, for example, has warned that missing or incorrect state identification numbers will delay processing or trigger outright rejection of the filing.

When Box 6 Can Be Left Blank

Nine states have no state income tax: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming. If both the payer and the contractor are in one of those states and no work was performed elsewhere, there is no state tax to report and Box 6 can stay blank.

Box 6 also serves no purpose when the payer has no state filing obligation at all, such as when the contractor performed all work in the payer’s home state and no withholding was required. The federal 1099-NEC still has to be filed with the IRS if the payment meets the reporting threshold, but the state information section is left empty unless the state requires its own copy.

If You’re a Contractor and Box 6 Is Blank

Receiving a 1099-NEC with income in Box 1 but nothing in Boxes 5, 6, or 7 is not automatically a problem. Those boxes are not required for federal purposes, and the state information is primarily there to help you with your state return.¹

You still owe state income tax on earnings from any state that taxes your income, and you do not need the payer’s state ID to file your own return. You report the income based on where the work was performed.

Box 6 matters more when Box 5 shows withholding. The state uses the payer’s ID to verify that the business actually remitted the withheld funds before crediting them to your account. If Box 5 shows a withholding amount but Box 6 is blank, ask the payer for a corrected form so your withholding credit does not get held up.

Correcting a Wrong or Missing Box 6 Entry

If a payer discovers a mistake in Box 6 after filing, the fix is to prepare a new 1099-NEC and check the “Corrected” box at the top. That tells the IRS and the state that the new form replaces the original.¹ The corrected form goes to the IRS, the contractor, and the relevant state tax authority. Paper filers may need to send a corrected Form 1096 transmittal with the state copy.

Timing drives the cost. Federal penalties for incorrect information returns in 2026 are $60 per form if corrected within 30 days, $130 if corrected by August 1, and $340 if the error is never corrected. Intentional disregard of the filing requirements carries a $680 per-form penalty.² State penalties vary but tend to escalate the same way. The 1099-NEC is due to the IRS and the recipient by January 31 of the year following payment, so an error caught before that deadline can usually be fixed without penalty.¹

1
Internal Revenue Service. Instructions for Forms 1099-MISC and 1099-NEC
2
Internal Revenue Service. Information Return Penalties