Penalty for Filing a 1099 Without a Social Security Number

The penalty for filing a 1099 without a Social Security number runs from $60 to $340 per return, depending on how quickly you file a corrected version. If the IRS decides you ignored the requirement on purpose, the floor jumps to $680 per return with no annual cap. And separate from any penalty, you’re legally required to start withholding 24% of every future payment to that contractor until they give you a valid taxpayer identification number.

What the Penalty Costs in 2026

The IRS treats a missing or incorrect TIN on a 1099 as an information return error, and the amount you owe depends on how fast you fix it. For returns due in 2026:¹

Corrected within 30 days of the due date: $60 per return
Corrected after 30 days but by August 1: $130 per return
Corrected after August 1 or never corrected: $340 per return

The correction clock starts on the original filing deadline. A Form 1099-NEC is due January 31, on paper or electronic. Form 1099-MISC is due February 28 on paper, or March 31 electronic.² A 1099-NEC filed January 31 with a blank SSN and corrected by early March sits in the $60 tier. Wait until September and it’s $340.

Annual caps limit the damage if you have many returns with the same problem. Small businesses — those with average gross receipts of $5 million or less over the prior three years — face caps of $239,000, $683,000, and $1,366,000 across the three tiers. Larger filers face $683,000, $2,049,000, and $4,098,500.³

When the Penalty Becomes $680 or More

If the IRS decides you knew the TIN was missing and filed anyway without doing anything about it, the penalty becomes at least $680 per return and the annual cap disappears entirely.¹ The line between a $340 oversight and $680-minimum intentional disregard almost always comes down to documentation. A business that can show it requested the SSN, followed up in writing, and kept copies of every attempt is on very different footing than one that filed a blank TIN field with no paper trail.

What To Do Before Filing Without an SSN

The IRS does not expect you to invent a Social Security number you don’t have. It expects you to prove you tried to get one. That means following a specific process before the filing deadline.

Start With Form W-9

Form W-9 is the standard tool for collecting a contractor’s TIN.⁴ The cleanest approach is to require a completed W-9 before issuing the first payment and keep the form on file. The IRS can ask to see it.

Follow the Solicitation Timeline

If a contractor doesn’t supply a TIN up front, the IRS wants to see a specific sequence of written requests:⁵

Initial solicitation when the business relationship begins
First annual solicitation by December 31 of that year
Second annual solicitation by December 31 of the following year

Each solicitation letter must warn the contractor that failing to provide a TIN can result in a $50 penalty assessed directly against them.³ That warning is not optional. Missing it undermines the whole solicitation defense.

Verify TINs You Do Receive

When a contractor gives you a number, verify it before filing. The IRS offers a free TIN Matching tool through its e-Services portal. The interactive version handles up to 25 lookups with immediate results; the bulk version processes up to 100,000 combinations within 24 hours.⁶ Most preventable penalties could have been stopped here in a few minutes.

If You Still Don’t Have an SSN, File Anyway

When solicitation attempts have run their course and no TIN has arrived, the IRS General Instructions direct you to leave the TIN field blank and file the return on time.⁷ Not filing at all creates a separate failure-to-file penalty on top of the missing-TIN penalty, so a blank field is the lesser problem.

The 24% Backup Withholding Obligation

Separate from anything the IRS charges you, a missing or incorrect TIN triggers a legal duty to withhold 24% of every payment you make to that contractor going forward. This is a requirement, not a discretionary step, and it begins as soon as you know the TIN is missing or wrong.⁸ If you fail to withhold when required, the IRS can hold you responsible for the amounts you should have taken out, even though the money already went to the contractor.

Withheld amounts are reported on Form 945, which covers nonpayroll withholding and is filed separately from your 1099s and payroll returns. The general due date is January 31 of the following year, with a short extension if you deposited every amount on time and in full.⁹

Once the contractor finally provides a valid TIN, stop withholding no later than 30 calendar days after it arrives. Update your records; do not send the corrected number to the IRS separately.⁵

If the IRS Sends You Notice 972CG

The IRS doesn’t assess these penalties silently. Before billing you, it sends Notice 972CG identifying the specific returns with errors and the proposed penalty amount. You have 45 days from the notice date to respond, or 60 days for foreign filers.¹

That window is your chance to make a reasonable cause argument. Ignore the notice and the IRS assesses the full proposed penalty without further review.¹⁰ The notice is a proposal, not a bill, and a solid response with documentation of your solicitation efforts can reduce or eliminate the penalty.

Building a Reasonable Cause Defense

Reasonable cause is the IRS standard for waiving information return penalties, and it requires more than saying the contractor wouldn’t cooperate. You have to show you acted responsibly both before and after the failure.¹¹

The documentation that carries the argument includes copies of every W-9 request you sent with the dates, records of any response or non-response from the contractor, evidence that you met each December 31 solicitation deadline, and proof that you began backup withholding when required. Businesses that lose reasonable cause arguments almost always failed on one of these points: sent the letters but kept no copies, kept copies but missed a deadline, or never started withholding.

If you collect W-9s electronically, the system has to log every submission, produce a hard copy on request, and capture an electronic signature from the payee.⁷

The Contractor’s Own Penalty

Every penalty above lands on the business filing the 1099. The contractor who refuses to provide an SSN is not off the hook, though. Under federal law, a person who fails to furnish a correct TIN when required faces a $50 penalty per failure, up to $100,000 per calendar year, and this amount does not adjust for inflation.¹² Since your solicitation letters are required to spell this out, the warning itself becomes leverage when a contractor is dragging their feet.

1
Internal Revenue Service. Information Return Penalties
2
Internal Revenue Service. General Instructions for Certain Information Returns (For Use in Preparing 2026 Returns)
3
Internal Revenue Service. 20.1.7 Information Return Penalties
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Internal Revenue Service. About Form W-9, Request for Taxpayer Identification Number and Certification
5
Internal Revenue Service. Understanding Your CP2100 or CP2100A Notice
6
Internal Revenue Service. Taxpayer Identification Number (TIN) Matching Tools
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Internal Revenue Service. General Instructions for Certain Information Returns
8
Internal Revenue Service. Backup Withholding
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Internal Revenue Service. Instructions for Form 945 (2025)
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Internal Revenue Service. 4.19.25 Information Return Penalty (IRP) Procedures
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eCFR. 26 CFR 301.6724-1
12
Office of the Law Revision Counsel. 26 USC 6723 – Failure To Comply With Other Information Reporting Requirements