How to Fill Out a W-9 Form Online (Step by Step)

If a client or platform asked you for a W-9, you can complete it online in a few minutes — no printing required. Here's how to fill out IRS Form W-9 correctly and send it safely.

This guide is general information, not tax advice. When in doubt, check the official IRS instructions or ask an accountant.

What is a W-9?

Form W-9 gives a business your correct Taxpayer Identification Number (TIN) so they can report payments they make to you (for example, on a 1099). Freelancers, contractors, and vendors are asked for it often.

Fill out a W-9 in the browser

1. Download the latest Form W-9 from the IRS website.
2. Open it in the PDF editor — the fields are usually detected automatically.
3. Complete each line (see below).
4. Sign and date it with the Sign and Date tools.
5. Download the finished PDF.

Line-by-line

• Line 1 — Name: your legal name as shown on your tax return.
• Line 2 — Business name: only if you operate under a different name (DBA).
• Line 3 — Federal tax classification: check the one box that matches you (Individual/sole proprietor, LLC, S-corp, etc.).
• Line 5–6 — Address: where the business should mail your 1099.
• Part I — TIN: your SSN (individuals) or EIN (businesses).
• Part II — Signature: sign and date to certify the information is correct.

Send it securely — never by plain email

A W-9 contains your SSN or EIN, so treat it like cash. Because our editor processes the form entirely on your device, your TIN is never uploaded to a third-party server while you fill it in. When you send the finished file, use a secure upload link or encrypted email rather than a plain attachment.

Common mistakes

• Checking more than one tax classification box.
• Entering an SSN when the client expects an EIN (or vice-versa).
• Forgetting to sign Part II — an unsigned W-9 is often rejected.

New to filling PDFs? Start with our how to fill out a PDF form guide, then open the editor to complete your W-9 free.