Tax year note: This topic is not tied to a single tax year. Rates and rules follow the current Form W-9 instructions on IRS.gov for the tax year in question.
A W-9 is not a tax return, not a bill, and not a contract. It is a one-page form on which you tell a payer your legal name, your taxpayer identification number (TIN), and your federal tax classification, and you certify that the information is correct. The payer uses it later to prepare your 1099.
Who gets it, and who does not
- Give it to the payer — the client or platform that pays you. That is the only destination.
- Do not send it to the IRS. The IRS does not collect W-9s from payees.
- Keep a copy for yourself, with a note of when you sent it and to whom.
A client usually asks for it before the first payment, or before the first payment that could lead to a 1099. That is normal. It does not mean you are in trouble, and it does not make you an employee.
Source: IRS, Form W-9, Request for Taxpayer Identification Number and Certification, and its instructions.
What you fill in
- Line 1 — Name: your legal name, exactly as it appears on your tax return.
- Line 2 — Business name: only if you use a business name different from your legal name. Most first-time sole proprietors leave this blank.
- Line 3 — Federal tax classification: most first-time freelancers check “Individual/sole proprietor.” Do not check a box for a business type you do not have.
- Lines 5–6 — Address: the address the payer should use for your 1099.
- Part I — TIN: your Social Security Number (SSN), or your Employer Identification Number (EIN) if you use one. See Do I Need an EIN? SSN vs EIN for First-Time Freelancers.
- Part II — Certification: read it, then sign and date. You are certifying under penalty of perjury that the TIN is correct and that you are not subject to backup withholding, unless the form’s instructions tell you to cross out that statement for your situation.
If your name, address or TIN changes, send the payer an updated W-9. A 1099 sent to an old address or under a wrong TIN is a common cause of the mismatch problems covered in What to Do If Your 1099 Is Wrong.
What happens if you do not give one, or the TIN is wrong?
The payer may be required to start backup withholding — withholding reportable payments at the backup withholding rate stated in the current Form W-9 instructions for the relevant tax year, and sending it to the IRS. That is not a fine and it is not your final tax. Amounts withheld this way are reported on your 1099 and are generally credited against the tax on your return. But backup withholding on every payment is a cash-flow problem you can usually avoid by giving a correct W-9 promptly. Do not rely on a rate quoted in an older article: check the rate in the Form W-9 instructions for the tax year in question.
Source: IRS, Backup Withholding; Form W-9 instructions.
Protecting your SSN — a practical note, not an IRS rule
A W-9 contains your SSN or EIN, so treat it like a sensitive document. Send it through the payer’s secure portal or system when one is offered, rather than as an unprotected email attachment, and ask the payer how they store it if you are unsure. Using an EIN instead of your SSN on W-9s is one reason some freelancers get an EIN — it is optional for most first-timers, not required.
W-9 vs 1099, in one sentence
The W-9 goes in at the start, so the payer knows who you are. The 1099-NEC comes out at the start of the next year, reporting what the payer paid you. One does not replace the other.
Next: The Complete First 1099-NEC Guide · Do I Need an EIN? SSN vs EIN for First-Time Freelancers · Your First 1099 Tax Calendar