How to fill out a W-9 form

What a W-9 is and who has to fill one out

Form W-9, titled Request for Taxpayer Identification Number and Certification, is a short IRS form that you give to a business, not to the IRS. The company keeps it on file. Its purpose is simple: it collects your legal name, your address, and your taxpayer identification number so the payer has the information they need to report money they pay you.

You are usually asked to fill out a W-9 when you are a US person being paid by a business as something other than an employee. That covers a lot of people:

• Independent contractors and freelancers doing project work for a company.
• Consultants, gig workers, and self-employed people invoicing clients.
• Small vendors and suppliers that a business buys services from.
• Landlords receiving rent from a business tenant.
• People receiving certain other reportable payments, such as some interest, dividends, or prizes.

The person or company asking you for the form is called the requester. They need your details so that, at the end of the year, they can send you and the IRS a 1099 form that reports the total they paid you. If you are a regular employee, you fill out a W-4 instead, and this guide explains that difference further down.

A quick note before you start: this is general information, not tax advice. Rules change, and only a tax professional can advise on your specific situation. Always complete the current official IRS form, which you can confirm on the official IRS W-9 page.

When you will be asked for a W-9

A W-9 request almost always comes at the start of a working relationship, before the first payment goes out. A new client may send you the blank form along with your contract, or a company may ask for one after you submit your first invoice. Many businesses will not release payment until they have a completed W-9 on file, so returning it quickly keeps your money moving.

You might also be asked to send an updated W-9 if your details change. If you move, change your business name, switch from a sole proprietorship to an LLC, or start using a new taxpayer ID, the requester needs a fresh form that matches your current records.

Be thoughtful about who is asking. A genuine W-9 request comes from a company you actually do business with. If a stranger emails you out of the blue asking for a W-9, treat it with caution, because the form contains sensitive personal information that is valuable to scammers.

How to fill out a W-9 line by line

The W-9 is only one page. Once you know what each line asks for, it takes just a few minutes. Here is what goes where, in the order the form presents it.

Line 1: Name

Enter your name exactly as it appears on your income tax return. If you are an individual or a sole proprietor, this is your own legal name, not a business or brand name. This line can never be left blank. The name here should match the name the IRS associates with your taxpayer ID, because a mismatch is one of the most common reasons a W-9 gets rejected.

Line 2: Business name or disregarded entity name

Fill this in only if you operate under a different name, such as a trade name, a doing-business-as name, or a disregarded entity name. If your business name is the same as your personal name, leave this line empty. For example, a freelancer named Jordan Lee who invoices clients as Lee Design Studio would put Jordan Lee on line 1 and Lee Design Studio on line 2.

Line 3: Federal tax classification

Here you check the single box that describes how you are taxed. The options include individual or sole proprietor, C corporation, S corporation, partnership, trust or estate, and limited liability company. Most freelancers and independent contractors who have not formed a separate entity check individual or sole proprietor. If you have an LLC, the form asks you to enter a letter for how the LLC is taxed, so read that line carefully and pick the classification that matches your situation. If you are unsure how your entity is taxed, check with your accountant before guessing.

Line 4: Exemptions

Most individuals leave this blank. The exemption boxes are for certain entities that are exempt from backup withholding or from FATCA reporting, and they call for specific codes. If you are a typical contractor or freelancer, these codes almost certainly do not apply to you. Do not enter a code just to fill the space, because putting the wrong code here can cause problems.

Lines 5 and 6: Address

Enter the mailing address where the requester should send your information returns, including your street address on line 5 and your city, state, and ZIP code on line 6. This is the address the payer will use to mail your year-end 1099, so use one where you reliably receive mail. If you have moved recently, use your current address rather than an old one.

Requester's name and address (optional)

There is an optional box on the right where you can note the requester's name and address. You can leave this blank. Some people fill it in to keep a record of who they gave the form to, which can be handy if you send W-9s to several clients.

Part I: Taxpayer identification number

This is the heart of the form. You provide one taxpayer identification number, or TIN. For an individual or a sole proprietor, that is usually your Social Security number. If you have an employer identification number, or EIN, for your business, you may be able to use that instead, and many self-employed people prefer to use an EIN so they are not handing out their SSN. A single-member LLC that is a disregarded entity generally uses the owner's SSN or EIN rather than the LLC's own EIN, so follow the form's instructions here. Enter only one number, and make sure it matches the name you put on line 1.

Part II: Certification and signature

By signing, you certify several things: that the TIN you gave is correct, that you are not subject to backup withholding (or that you are, if the form's language applies to you), that you are a US person, and that any FATCA code you entered is correct. Read the certification text on the form so you understand what you are signing. Then sign and date it. In many everyday cases the signature is required, so do not skip it. An unsigned W-9 is often treated as incomplete and sent back to you.

How to fill out a W-9 online without printing

You do not need to print the W-9, fill it in by hand, and scan it back. You can complete the whole form on screen. Open our fillable W-9, type your details into each field, add your signature, and download a clean, finished PDF. It is quicker than handwriting and much easier for the requester to read.

Before you type anything, confirm you are using the current official form. The IRS updates its forms from time to time, and a requester wants the up-to-date version. You can check the latest revision on the official IRS W-9 page and make sure the form you complete matches it.

If you have never filled a PDF form on screen before, our general walkthrough on how to fill out a PDF form covers the basics of typing into fields, adding text to flat pages, and signing. The same steps apply to a W-9. When you use a browser-based tool like our fill a PDF tool, the document is processed on your own device rather than uploaded, which matters a great deal for a form that contains your Social Security number.

How to return a W-9 securely

A completed W-9 holds your legal name, address, and taxpayer ID, which is exactly the mix of details someone would want for identity theft. How you send it back matters as much as how you fill it out.

• Do not email an unencrypted W-9 as a plain attachment. Regular email is not private, and a copy can linger in inboxes and mail servers.
• Prefer a secure method: a client portal, an encrypted file-sharing link, a password-protected PDF (with the password shared separately), or hand delivery.
• If a company offers a secure upload page for onboarding documents, use it rather than email.
• Only send the form to a business you actually work with, and confirm the request is genuine if anything feels off.
• Keep your own copy of what you sent and note the date, so you have a record.

Taking a minute to send the form safely protects you long after the paperwork is done.

Common mistakes to avoid

Most W-9 problems come from small, avoidable errors. Watch for these:

• Name and TIN do not match. The name on line 1 must match the name tied to your taxpayer ID in IRS records. A mismatch can trigger backup withholding or a rejected form.
• Putting a business name on line 1. Line 1 is for your legal name. A trade name belongs on line 2.
• Choosing the wrong tax classification. Guessing on line 3, especially with an LLC, causes confusion. Confirm how you are taxed if you are not sure.
• Filling in exemption codes by mistake. Most individuals should leave line 4 blank.
• Forgetting to sign and date. An unsigned form is often treated as incomplete.
• Using an old address. Your 1099 goes to the address on the form, so keep it current.
• Sending it insecurely. Never treat this form like an ordinary email attachment.

W-9 vs W-4 vs 1099: how they differ

These three forms are easy to mix up because they all involve pay and taxes, but they do different jobs.

• W-9 is what an independent contractor or vendor gives to a business. It shares your name and taxpayer ID so the payer can report what they pay you. You fill it out once, and the company keeps it.
• W-4 is what an employee gives to an employer. It tells the employer how much tax to withhold from each paycheck. If you are on a company's payroll as an employee, you fill out a W-4, not a W-9.
• 1099 is the form the business sends later. Using the details from your W-9, the payer issues a 1099 that reports the total they paid you during the year, and they send a copy to you and to the IRS.

In short: a W-9 is information you give at the start, a 1099 is the report that comes back at the end, and a W-4 belongs to the world of regular employment rather than contract work.

A word about backup withholding

You will see the phrase backup withholding on the W-9, and it is worth understanding in plain terms. Normally, a business pays a contractor the full amount and no tax is held back. Backup withholding is the exception: in certain situations, the payer is required to hold back a portion of your payment and send it to the IRS on your behalf. This can happen, for example, when the name and taxpayer ID on your W-9 do not match IRS records, or when you fail to provide a correct TIN.

For most people who fill out the form correctly, backup withholding never comes up. The best way to stay out of it is to enter your legal name and taxpayer ID accurately so they match your IRS records, and to sign the certification. If you ever receive a notice from the IRS or a payer about backup withholding, that is a good moment to talk with a tax professional rather than guess at a fix.

A quick checklist before you send it

Before you hand your W-9 to the requester, run through this short list to catch the errors people make most often:

1. Line 1 shows your legal name, exactly as on your tax return.
2. Line 2 has your business or trade name only if it differs from line 1.
3. You checked one tax classification box on line 3.
4. Line 4 is blank unless an exemption code truly applies to you.
5. Your current mailing address is on lines 5 and 6.
6. Part I shows one taxpayer ID that matches the name on line 1.
7. You signed and dated Part II.
8. You are using the current official form and plan to return it securely.

What happens after you submit it

Once the requester has your completed W-9, they simply keep it on file. They do not send it to the IRS. Nothing else happens right away. The form quietly does its job in the background.

Its real moment comes at tax time. After the year ends, the business uses the information from your W-9 to prepare a 1099 that reports what they paid you, and they send it to you and the IRS, typically early in the new year. You then use that 1099 when you file your own taxes. Because you are usually paid without tax withheld, remember that you may owe income and self-employment tax on that money, and many self-employed people set aside a portion of each payment and make estimated payments during the year. A tax professional can help you plan for that.

If your details change later, send the requester an updated W-9 so their records stay accurate. And if you work with several clients, you will likely fill out a separate W-9 for each one, which is normal. With our fillable W-9 you can complete a fresh copy in minutes whenever a new client asks.

Remember, this guide is general information and not tax advice. For your specific situation, talk with a qualified tax professional, and always complete the current official IRS form.