Box 17 on Form 1099-MISC is labeled “State/Payer’s state no.” and holds two pieces of information: the two-letter abbreviation of the state that received withheld tax, and the payer’s tax ID number registered with that state. It does not contain a dollar amount. The actual withholding sits in Box 16, and the state-taxable portion of your income sits in Box 18.1IRS.gov. Form 1099-MISC (Rev. April 2025)
Think of Box 17 as the address label on the withholding. It tells you which state got the money in Box 16 and how the payer is identified there. If a payer withheld for two states on the same form, you’ll see two entries side by side, separated by a dashed line, each paired with its own Box 16 and Box 18.
How Boxes 16, 17, and 18 Fit Together
The IRS treats these three boxes as one unit, the “State Information” section of the form.2Internal Revenue Service. Instructions for Forms 1099-MISC and 1099-NEC (04/2025) Each box does something different:
- Box 16, State tax withheld, is the dollar amount the payer deducted from your payments and sent to the state.
- Box 17, State/Payer’s state no., identifies the state and gives the payer’s state-level tax ID.
- Box 18, State income, is the portion of the payments on this form that is subject to that state’s tax. It can be less than the form’s total if only some of the income was sourced to that state.
Read across the row: Box 18 is the income base, Box 16 is what was withheld from it, and Box 17 tells the state where to look you up.
Don’t Confuse Box 15 With the State Section
Box 15 sits directly above the state block and is labeled “Nonqualified deferred compensation.” It relates to Section 409A retirement plan issues and has no connection to state taxes.1IRS.gov. Form 1099-MISC (Rev. April 2025) Some online guides describe Box 15 as the state ID number. That is wrong. If a source you’re reading says Box 15, check it against the actual form.
If You’re a Contractor, You May Be Looking at the Wrong Form
Nonemployee compensation moved off the 1099-MISC in 2020 and now goes on Form 1099-NEC. The box numbers for state withholding are not the same between the two forms.2Internal Revenue Service. Instructions for Forms 1099-MISC and 1099-NEC (04/2025) On the 1099-NEC, state tax withheld is Box 5, the state and payer’s state ID is Box 6, and state income is Box 7.3IRS.gov. Form 1099-NEC (Rev. April 2025) – Nonemployee Compensation
So if you freelance or contract and you’re hunting for state withholding info, check whether the form in your hand is actually a 1099-NEC. Form 1099-MISC now covers things like rents, royalties, prizes and awards, medical and health care payments, and crop insurance proceeds.4Internal Revenue Service. About Form 1099-MISC, Miscellaneous Information Rental income from out-of-state property is a common case where a 1099-MISC arrives with the state boxes filled in.
When State Tax Even Gets Withheld
State withholding on 1099-MISC payments is not automatic the way it is on a W-2. It usually shows up in one of two situations.
The first is non-resident withholding. Many states require a payer to withhold state income tax when paying someone who lives elsewhere for services performed in the payer’s state. Rates and dollar thresholds vary from state to state.
The second is a voluntary agreement. You and a payer can arrange upfront withholding, similar to wage withholding, if you’d rather not face a large bill at filing time.
One exception to know about: some states have reciprocity agreements with their neighbors. Residents of a partner state are exempt from the other state’s withholding even when they cross the border to work. Where reciprocity applies, Boxes 16 through 18 should be blank.
Using the Withholding on Your State Return
The Box 16 amount is money already paid toward your state tax bill. On your state return, you claim it as a credit against what you owe, or it adds to your refund if you’ve overpaid. Box 17 and Box 18 give the state the identifiers it needs to match its records to yours.
If tax was withheld for a state where you don’t live, you generally need to file a non-resident return in that state to report the income and claim the withholding. Your home state typically then credits you for taxes paid to the other state, so the same income isn’t taxed twice. The specifics vary, but the principle holds across states.
What to Do If Box 17 (or 16 or 18) Is Wrong
Wrong state abbreviations, mismatched ID numbers, and incorrect withholding amounts all happen. Contact the payer first and ask for a corrected 1099-MISC, which will arrive marked “CORRECTED” at the top; the payer files the corrected copies with the IRS and the affected state.5IRS.gov. What to Do When a W-2 or Form 1099 Is Missing or Incorrect
If you haven’t received a corrected form by the end of February, call the IRS at 800-829-1040 and the IRS will contact the payer for you. You can still file on time using your best estimate of the correct figures. If the corrected form later shows different numbers, file Form 1040-X to amend your federal return and file the equivalent amended return for the affected state.5IRS.gov. What to Do When a W-2 or Form 1099 Is Missing or Incorrect
Payers face per-form penalties for filing incorrect 1099s, with higher penalties the longer errors go uncorrected and a separate, uncapped penalty for intentional disregard.6Internal Revenue Service. Information Return Penalties Mentioning that when you follow up with a slow payer tends to help move the correction along.