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

Filling out a W-9 is usually simple if you understand what each field means. This guide explains how to complete Form W-9 correctly, what information to include, and which mistakes to avoid.

If you need the main form page, see W-9 Form: Download, Instructions and Example.

Quick answer

To fill out a W-9, you generally need to:

1. enter your legal name
2. add your business name if applicable
3. choose your federal tax classification
4. enter your address
5. provide your Social Security Number (SSN) or Employer Identification Number (EIN)
6. sign and date the form

The completed W-9 is usually given to the requester, not sent directly to the IRS.

Before you start

Before filling out Form W-9, make sure you have the correct information ready. In most cases, you will need your legal name, address, tax classification, and taxpayer identification number.

If you are a freelancer, sole proprietor, or independent contractor, the W-9 is often requested by a client or payer before they issue payment or prepare a Form 1099-NEC.

Step 1: Enter your name

On the first line of the W-9, enter your full legal name exactly as it appears on your tax return.

This is one of the most important parts of the form. If your name does not match IRS records, it may create reporting issues or delays.

Step 2: Add your business name if applicable

If you operate under a business name, trade name, or DBA, enter it on the business name line.

If you do not have a separate business name, you can leave this line blank.

Step 3: Choose your federal tax classification

Select the tax classification that applies to you. Common options include:

• Individual or sole proprietor
• C corporation
• S corporation
• Partnership
• Trust or estate
• Limited liability company (LLC)

Most freelancers and independent contractors choose Individual/Sole Proprietor, unless they operate under a different business structure.

If you are an LLC, make sure you choose the correct tax treatment based on how your business is taxed.

Step 4: Complete any exemption fields if needed

Some versions of Form W-9 include exemption fields. Most individuals and small contractors do not need to complete these fields.

If you are not sure whether an exemption applies to you, it is usually safer to review the IRS instructions or ask a tax professional before entering anything.

Step 5: Enter your address

Provide your mailing address, city, state, and ZIP code.

This should usually be the address where you want to receive tax-related correspondence and information forms.

Step 6: Provide your SSN or EIN

In the taxpayer identification number section, enter:

• your Social Security Number (SSN) if you are filing as an individual or sole proprietor, or
• your Employer Identification Number (EIN) if you are using a business tax ID

Be careful here. Entering the wrong taxpayer identification number is one of the most common W-9 mistakes.

Step 7: Sign and date the form

At the bottom of the W-9, sign and date the certification section.

By signing the form, you confirm that the information provided is correct and that your taxpayer identification number is accurate.

A W-9 without a signature may be considered incomplete.

W-9 example explained

You can add an annotated image of the W-9 form in this section so users can see where each field goes.

A helpful visual usually points out:

• where to enter your legal name
• where to add a business name
• how to choose a tax classification
• where to enter your SSN or EIN
• where to sign and date the form

If you publish a separate visual guide, link it here, for example: W-9 Example.

Common mistakes when filling out a W-9

Here are some of the most common mistakes people make when completing Form W-9:

• using a name that does not match tax records
• choosing the wrong tax classification
• entering the wrong SSN or EIN
• leaving required fields blank
• forgetting to sign and date the form

These errors can lead to delayed payments, incorrect tax reporting, or backup withholding.

For more detail, see Common W-9 Mistakes to Avoid.

What happens after you complete a W-9?

After completing the form, send it to the person or business that requested it. In most cases, the requester keeps the W-9 on file and uses the information for tax reporting purposes.

The form is usually not mailed to the IRS by the person completing it.

Frequently asked questions

Do I send Form W-9 to the IRS?

No. In most cases, you give the completed W-9 to the requester, not directly to the IRS.

Who should fill out a W-9?

The person or business receiving payment usually fills out the W-9 and gives it to the payer.

Can I use an EIN instead of an SSN?

Yes, if you have a valid EIN and it applies to your business or tax situation.

What if I make a mistake on a W-9?

If you make a mistake, complete a new corrected form and provide it to the requester as soon as possible.

Related resources

• W-9 Form: Download, Instructions and Example
• Who Needs to Fill Out a W-9?
• W-9 Example
• Form 1099-NEC

Final thoughts

If you follow each step carefully, filling out a W-9 should only take a few minutes. The key is to use the correct legal name, choose the right tax classification, enter the correct SSN or EIN, and sign the form before submitting it.

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