Missing W-9 at filing time? Separate the data problem from the tax-procedure problem.
A practical workflow for payers dealing with a payee that has not provided usable taxpayer-identification information before information-return filing.
First, determine what is actually missing
Separate a truly missing TIN from a formatting problem. A value that became scientific notation, lost a leading zero, or was stored in the wrong field may be fixable from your existing secured source record. If there is no TIN at all, treat the problem as a missing-TIN workflow rather than a CSV-formatting problem.
Also confirm whether the payee should have been asked for Form W-9 in the first place. A foreign person can require a different withholding certificate.
Review solicitation history before sending another generic email
Publication 1586's general rules call for an initial TIN solicitation when the relationship is established and, when the TIN remains missing, up to two annual solicitations. Timing matters. Use the TIN Solicitation Timeline Calculator to organize the general dates, but check the specific form's rules because some reporting programs have special solicitation requirements.
Backup withholding can become a payment-processing issue
Current IRS guidance states that backup withholding is 24% when it applies. For reportable payments where the payee fails to furnish a TIN in the required manner, withholding may need to begin. That is why a missing W-9 is not merely an administrative inconvenience—it can affect future payments and Form 945 reporting.
For nonemployee compensation, do not rely on the special 60-day awaiting-TIN rule that can apply to certain interest and dividend payments.
Keep the filing file and the payee master synchronized
When the payee finally provides corrected information, update the master payee record first. Then regenerate or correct the filing data from that controlled source. This reduces the chance that one spreadsheet is fixed while another system still holds the old value.
Missing W-9 at filing time? Separate the data problem from the tax-procedure problem. FAQs
Can I simply leave the TIN blank?
An information return with a missing TIN can create filing and penalty issues, and backup withholding may apply to reportable payments. Review the specific information-return instructions and current backup-withholding guidance.
Should I make another request for the TIN?
Publication 1586 describes initial and annual solicitation rules for missing TINs. Whether another solicitation is required depends on the history, timing and the specific reporting rule.
Does 'Applied For' solve missing TINs for contractors?
No. The 60-day awaiting-TIN rule described in the W-9 requester instructions is limited to certain interest, dividend and readily tradable instrument payments and does not generally apply to nonemployee compensation.
Should I delay filing while waiting for a W-9?
Do not assume that waiting is the right answer. Filing deadlines and correction procedures still apply. Review the current form instructions or professional guidance for the specific situation.
What if the payee refuses to provide a TIN?
Backup withholding and solicitation rules can apply. Document the requests you made and review the current IRS requester instructions, Publication 1281 and Publication 1586.
IRS sources: Requester instructions · Publication 1586 · Publication 1281
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