Someone just asked you for a W-9. Maybe it’s a new client, your bank, or a freelance platform. You need to fill it out, sign it, and send it back – ideally without printing anything or paying for software.
I’ve been filling out W-9 forms digitally since 2019, and I’ve tested probably a dozen different ways to do it. Some work great, some corrupt the form fields, and one memorable time I accidentally sent a W-9 with my SSN visible in the filename. Learn from my mistakes.
Here’s exactly how to fill out a W-9 form as a PDF for free, which tools actually work well for it, and what each field means so you don’t second-guess yourself. If you need a more full-featured PDF editing setup beyond just W-9 forms, check out our guide to the best free PDF editors – but for this specific task, you probably don’t need anything that heavy.
Quick Comparison: Free Tools for Filling W-9 PDF
| Tool | Platform | E-Signature | Works Offline | File Size Limit | Best For |
|---|---|---|---|---|---|
| Adobe Acrobat Reader | Windows, Mac, iOS, Android | Yes (Fill & Sign) | Yes | None | Most reliable option overall |
| Preview (Mac) | macOS only | Yes (trackpad/camera) | Yes | None | Mac users who want zero installs |
| Smallpdf | Browser (any OS) | Yes | No | Free: 2 tasks/day | Quick one-off fills |
| PDFescape | Browser | Limited (text only) | No | 10 MB / 100 pages | No account needed |
| Xodo | Browser, iOS, Android | Yes | App: Yes | None (app) | Mobile filling |
| LibreOffice Draw | Windows, Mac, Linux | No (manual workaround) | Yes | None | Linux users, full control |
| Google Drive | Browser | No native | No | 100 MB | Already use Google Workspace |
Step 1: Download the Official W-9 PDF
Go to irs.gov/pub/irs-pdf/fw9.pdf and download it directly. This is the only legitimate source. The current version is Rev. March 2024 and it’s 6 pages (4 pages of instructions + 2 pages you actually fill out).
Don’t Google “W-9 form download” and grab whatever comes up. I’ve seen sketchy sites that host modified versions with extra fields or that route your data through their servers. Always go straight to irs.gov.
The PDF from IRS is already a fillable form – meaning it has interactive fields built in. If you open it in Adobe Reader, you can click each field and start typing. That’s the easiest path. But if the fillable fields don’t work (happens sometimes when the PDF gets re-saved), any of the tools below will let you type over the form manually.
Step 2: Choose Your Tool (by Platform)
Windows: Adobe Acrobat Reader (Free)
Download from get.adobe.com/reader. Skip the McAfee bundle they try to sneak in during install. Once open:
- File > Open > select fw9.pdf
- Click any blue field to type in it (the IRS PDF has built-in form fields)
- For the signature: Tools > Fill & Sign > click “Sign yourself” > draw or type your signature
- File > Save As > pick your location
This takes about 4 minutes total. The form fields work natively, font sizing adjusts automatically, and the signature tool is surprisingly decent for a free product.
Mac: Preview (Built-in, No Install)
Double-click fw9.pdf – it opens in Preview by default. The form fields work here too, though Preview occasionally renders them slightly differently.
- Click fields to type (Preview supports PDF form fields natively)
- For the signature: Tools > Annotate > Signature > click “Create Signature”
- You can draw on trackpad, use your iPhone camera to capture a written signature, or type it
- Cmd+S to save
The trackpad signature option is honestly my favorite way to sign any PDF. Takes 10 seconds and looks natural, not like a typed font pretending to be handwriting.
Browser (Any Platform): Smallpdf or PDFescape
If you don’t want to install anything:
Smallpdf (smallpdf.com/edit-pdf) – upload your W-9, click fields to fill them, use the signature tool, download. Limited to 2 free operations per day. Your file gets deleted from their servers after 1 hour according to their privacy policy.
PDFescape (pdfescape.com) – older interface but no account required. Upload, fill in text fields manually, download. Doesn’t handle the built-in form fields as cleanly, so you might need to position text boxes over the fields yourself.
For more options on filling forms in browser, we covered this thoroughly in our how to fill PDF forms for free guide.
Mobile: Xodo or Adobe Reader App
Both Xodo (free on iOS/Android) and Adobe Reader mobile handle W-9 form fields properly. The main annoyance is typing on a phone keyboard when you need to enter your address and TIN. If you can do this on a tablet or computer instead, your life will be easier.
Step 3: Fill Out Each Field (What Goes Where)
The W-9 is simpler than it looks. Here’s exactly what goes in each line:
Line 1: Name
Your legal name as it appears on your tax return. If you’re a sole proprietor, this is your personal name – not your business name. The IRS matches this against your SSN, so it needs to be exact.
Line 2: Business name (if different)
Only fill this if you operate under a DBA (doing business as) name, LLC name, or other entity name that’s different from Line 1. If you freelance under your own name, leave this blank.
Line 3: Federal tax classification
Check ONE box. Most freelancers and solo consultants check “Individual/sole proprietor or single-member LLC.” If you formed an LLC that elected S-Corp or C-Corp status, check the appropriate corporate box instead.
Line 4: Exemptions
Almost certainly leave this blank. This applies to corporations, certain nonprofits, and financial institutions. If you’re reading a guide on how to fill this out, you’re probably not exempt.
Lines 5-6: Address
Your mailing address. This is where the requester might send your 1099 at tax time if they mail physical copies. Use whatever address you want tax documents sent to.
Line 7: Account numbers
Optional. The requester might ask you to include their internal account number here. If they didn’t mention it, skip it.
Part I: Taxpayer Identification Number (TIN)
This is the important one. Enter either your Social Security Number (SSN) or your Employer Identification Number (EIN). If you’re a sole proprietor and you have an EIN, you can use either – but using the EIN keeps your SSN off one more piece of paper floating around.
Part II: Certification (Signature)
Sign and date. You’re certifying that the TIN you gave is correct and that you’re not subject to backup withholding (unless you crossed out item 2, which almost nobody does).
Step 4: Sign It Electronically
The IRS accepts electronic signatures on W-9 forms. You have a few options depending on your tool:
- Adobe Reader: Fill & Sign > “Sign yourself” > draw with mouse/trackpad or type
- Preview (Mac): Annotate > Signature > create from trackpad or iPhone camera
- Smallpdf: Click signature icon in toolbar > draw or upload image
- Xodo: Annotation tools > Signature stamp
Typed signatures work fine legally, but if you want it to look more “real,” draw it with your trackpad or finger on mobile. I’ve never had anyone reject a W-9 because the signature looked typed, though.
Need a deeper walkthrough on digital signatures? See our guide on how to sign PDF documents for free.
Step 5: Save and Send Securely
Before sending, double-check:
- Your name matches your tax return exactly
- You checked the right classification box
- Your TIN is correct (one wrong digit means your 1099 won’t match IRS records)
- You signed and dated it
Now the security part. Your W-9 has your SSN or EIN on it. Don’t just email it as a naked attachment.
Better options:
- Password-protect the PDF before sending (Adobe Reader: File > Protect Using Password). Send the password via text or phone call separately.
- Upload to a secure portal if the requester provides one (most larger companies do)
- Use an encrypted file-sharing service like Tresorit or a password-protected zip
If you need to lock down the PDF, our best free PDF editors roundup covers which tools offer password protection in their free tier.
Common Mistakes to Avoid
After filling out dozens of these for various contractor gigs, here’s what trips people up:
Using your DBA name on Line 1 instead of your legal name. Line 1 must match your tax return. Your business name goes on Line 2. Get this backwards and the IRS can’t match your TIN.
Checking the wrong entity type. If you formed a single-member LLC but didn’t elect corporate tax status, you’re still “Individual/sole proprietor.” The LLC box is for multi-member LLCs taxed as partnerships.
Entering SSN in the EIN field (or vice versa). The form has two separate boxes – SSN on the left, EIN on the right. Put your number in the correct one. Seems obvious but I’ve seen this mistake more than once.
Forgetting to sign. An unsigned W-9 is invalid. The requester will send it back.
Using the wrong form revision. Always download fresh from irs.gov. Old revisions might be rejected. The current one says “Rev. March 2024” in the top left corner.
FAQ
Can I fill out a W-9 form on my computer for free?
Yes. Download the official PDF from irs.gov and open it in Adobe Acrobat Reader (free), Preview on Mac, or any browser-based PDF tool like Smallpdf. The IRS version is a fillable PDF with interactive fields – you just click and type. No printing, no scanning, no paid software needed.
Where do I download the official W-9 form PDF?
Always from irs.gov/pub/irs-pdf/fw9.pdf. That’s the direct link to the current revision (March 2024). Don’t trust third-party sites that host their own copies – some add tracking or modify fields.
Do I need to sign the W-9 form digitally?
Yes, Part II requires your signature. The IRS accepts electronic signatures on W-9 forms. Use Fill & Sign in Adobe Reader, the signature tool in Preview on Mac, or any free PDF editor with signature support. A typed name in a script font counts as a valid e-signature for this purpose.
Is it safe to email a filled W-9 form?
A W-9 contains your SSN or EIN, which makes it sensitive. If you must email it, password-protect the PDF first and share the password through a different channel (text, phone). Better yet, use the requester’s secure upload portal if they have one.
What happens if I fill out the W-9 form incorrectly?
Just fill out a new one and send it to the requester. There’s no IRS penalty for correcting a W-9 – it’s not a filed tax document, just an information form. You only get penalized for intentionally providing false info or refusing to furnish your TIN when required.