Fax Form SS-8 to request a worker-status determination

Form SS-8 asks the IRS to determine whether a worker is an employee or an independent contractor for federal employment tax and income-tax-withholding purposes. Both firms and workers can file it. You can fax the completed, signed form to the IRS at 855-242-4481, or mail it to the SS-8 Determinations unit in Holtsville, NY.

Upload your completed, signed SS-8 and we fax it to the IRS determinations line and email you the transmission report as dated proof of filing.

The IRS doesn't commit to a turnaround time, and a determination can take many months — its own instructions tell you not to delay filing your tax return while you wait for an answer.

Fax Form SS-8 (worker status) now — $2.49

Where this form faxes

ScenarioIRS fax number
Firms and workers (nationwide)855-242-4481

IRS fax numbers change without notice. We re-verify our routing table against the current IRS form instructions, and the exact number your document was sent to is printed on your transmission report.

Numbers last verified against IRS sources: 2026-07-19 · Official IRS source

Deadline

No filing deadline, but the IRS won't issue a determination for a tax year once the statute of limitations on that return has closed. Don't delay filing your return while an SS-8 is pending.

Frequently asked questions

Yes. The current instructions give a fax number — 855-242-4481 — as an alternative to mailing the form to the SS-8 Determinations unit at P.O. Box 630, Stop 631, Holtsville, NY 11742-0630.

Both firms and workers file Form SS-8 to request a determination of a worker's status under the common-law rules for federal employment taxes and income tax withholding.

Yes. The instructions require the form to be signed and dated by the taxpayer. A stamped signature is not accepted, and — importantly — your power of attorney representative's signature is not accepted either; you must sign it yourself. A scanned handwritten signature on the faxed copy is fine.

No. Unlike many IRS forms, Form SS-8 will not accept a POA representative's signature — the firm or worker requesting the determination must sign it personally.

The IRS doesn't publish a turnaround time and a determination can take many months. Its instructions specifically warn you not to delay filing your tax return in anticipation of an answer.

Both are accepted. Faxing to 855-242-4481 gives you a dated transmission report immediately, versus mailing to Holtsville, NY and waiting on delivery.

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