How to Fill Out Form W-9: A Freelancer's Guide

A new client just asked you to "send over a W-9," and now there is a one-page IRS form sitting in your inbox. The good news is that for most freelancers, filling out a W-9 takes about five minutes once you know what each line wants. This guide walks through how to fill out a W-9 line by line, explains who needs to complete one, points out the mistakes that trigger IRS notices, and covers the new sections added in the March 2024 version of the form.

What a W-9 is and why clients ask for it

Form W-9 is the IRS Request for Taxpayer Identification Number and Certification. When a business pays you as an independent contractor, it needs your taxpayer information on file so it can report what it paid you at year-end. That report is the 1099-NEC.

You do not send the W-9 to the IRS. You send it to the client who requested it, and they keep it on record. Think of it as the form that tells a client exactly whose name and tax ID to put on your 1099. If you want the full picture of how those two forms connect, our article comparing Forms W-2 and 1099-NEC breaks it down.

One detail worth knowing for the current tax year: the threshold for issuing a 1099-NEC rose from $600 to $2,000 starting in 2026 under the One Big Beautiful Bill Act. A client may still ask for your W-9 even if they expect to pay you less, because keeping it on file is simpler than tracking the threshold all year.

Who needs to fill out a W-9?

You fill out a W-9 yourself when a business pays you and you are not its employee. That covers freelancers, independent contractors, consultants, gig workers, and single-member LLCs. You complete your own form rather than having the client fill it in for you.

You generally do not need one if you are being hired as a W-2 employee, since employees fill out a W-4 instead. And a W-9 is not required for every payment, for example, personal payments between friends, or payments to certain exempt entities. When in doubt, the client requesting the form is the one who decides they need it on file.

Form W-9 line by line

Here is what goes on each part of the current (March 2024) form.

1. Line 1 — Name. Enter your full legal name exactly as it appears on your tax return. If you are a sole proprietor, this is your personal name, not your business name.
2. Line 2 — Business name. Fill this in only if you operate under a business name or DBA that is different from Line 1. Otherwise leave it blank.
3. Line 3a — Federal tax classification. Check the one box that matches how you are taxed. Most freelancers and single-member LLCs that have not elected corporate status check Individual/sole proprietor or single-member LLC.
4. Line 3b — Foreign partners or owners. New in the March 2024 form. It applies only to partnerships, trusts, and estates passing this form to another flow-through entity with foreign partners. Most solo freelancers leave it blank.
5. Line 4 — Exemptions. Leave blank. The exemption codes apply to certain corporations and entities covered by FATCA, not to typical independent contractors.
6. Lines 5 and 6 — Address. Use the address where you want to receive your 1099. A PO Box is fine. Match it to the address on your tax return so forms do not go to an old place.
7. Part I — Taxpayer Identification Number. Enter your Social Security number or your Employer Identification Number, but not both. If you are a sole proprietor, the IRS prefers your SSN even if you have an EIN for banking.
8. Part II — Certification. Sign and date the form. Your signature certifies the information is accurate and that you are not subject to backup withholding.

Filling out a W-9 as a single-member LLC

Single-member LLCs trip people up the most. If your LLC is a "disregarded entity" for tax purposes (the default unless you have elected S-corp or C-corp status), the IRS wants the owner's information, not the LLC's.

• Line 1 should show your name, the owner, not the LLC name.
• Line 2 is where the LLC's name goes.
• Line 3a: check Individual/sole proprietor or single-member LLC.
• Part I: generally use the owner's SSN (or the owner's EIN), not the LLC's EIN.

The mistakes that trigger IRS notices

A few errors come up again and again on freelancer W-9s:

• Using the wrong TIN for a single-member LLC. If your LLC is a disregarded entity, you generally use the owner's SSN or EIN, not the LLC's EIN. This mismatch is one of the most common causes of IRS notices.
• Mismatched name and number. The name on Line 1 must match the name the IRS has on file for your SSN or EIN. A name change that has not been reported to the Social Security Administration is a frequent culprit.
• Entering both an SSN and an EIN. Pick one. Entering both can flag the form.
• Skipping the signature. An unsigned W-9 is not valid. Part II is not optional.

How to fill out and sign your W-9 online

You do not need to print, sign, and scan a W-9. You can complete and sign it digitally, which is faster and keeps a clean copy for your records.

1. Open the Fill & Sign tool on TheBestPDF and upload the W-9 PDF.
2. Click each field and type your information directly onto the form.
3. Add your electronic signature in Part II.
4. Download the completed form and send it to your client.

A digital signature on a W-9 is valid, and it saves you the print-and-scan routine every time a new client asks. If you would like to understand the rules behind digital signing, our guide on how to e-sign a document online explains when an electronic signature holds up. Save your completed W-9 as its own file so you can resend it in seconds the next time a client asks, and update it only when your address, name, or tax ID changes.

Final thoughts

Filling out a W-9 is mostly about getting your legal name, address, and taxpayer number right, then signing it. Match the details to your tax return, use one TIN, and do not skip the certification. When you are ready to complete and sign the form, TheBestPDF lets you do it online and save a copy you can reuse with every new client.

Legal & ethical note: This is general information about a federal tax form, not tax or legal advice. For questions about your specific situation, check the IRS instructions or consult a tax professional.