Form W-9 for sole proprietors
A sole proprietorship is not a separate taxpayer, and that single fact explains every entry on the form: the IRS knows your business by your name, not the name on your signage.
Name, box, number, and what gets reported
- Line 1
- Your own legal name, always
- Line 2
- Your DBA, trade name or fictitious business name
- Line 3a
- Individual/sole proprietor (the first box)
- Line 4
- Blank
- Part I
- Your SSN preferred; your EIN is also acceptable
- Tax return
- Schedule C attached to your Form 1040
You registered the trade name, opened an account under it, had cards printed, and now a client wants a W-9. Every instinct says fill it in as the business. Resist that instinct. A sole proprietorship has no legal existence apart from its owner, so the business license, the separate bank account, the registered trade name and even an EIN all sit outside the question this form is asking. The income is yours. It goes on your personal return under your own name and your own taxpayer number, and the W-9 has to say so on Line 1 before anything else on the page matters.
Past that point the form is short work. Two names, two lines, one number, one signature.
Line 1 is the taxpayer. Line 2 is the trade name. The IRS matches on Line 1 and Part I, and never looks at Line 2.
What to put on each line
Writing Raghavan Web Design on Line 1 with your SSN in Part I produces a name and TIN pair the IRS cannot match. The 1099 that follows generates a CP2100 notice to your client, a B notice to you, and eventually 24% withholding on your payments.
Sole proprietor with an EIN
Many sole proprietors hold an EIN: they once ran payroll, a bank insisted on one, or they simply got tired of handing out an SSN a dozen times a year. None of those reasons changes your classification, whether you are selling on a marketplace or a creator platform. It is still your business, still Schedule C, still box 1 on Line 3a, and the only live question is which number goes in Part I.
| Field | Entry |
|---|---|
| Line 1 | Your own name. Unchanged. Holding an EIN does not make the business a separate taxpayer |
| Line 2 | Your trade name |
| Line 3a | Still the first box, individual/sole proprietor |
| Part I | Your EIN, in the EIN box, or your SSN. Either is acceptable |
Use the same number with the same client every year. Switching between your SSN and your EIN mid-relationship produces two 1099s under two numbers and an income figure the IRS cannot reconcile against a single return.
What a DBA is, and why it lives on Line 2
A DBA (“doing business as,” also called a trade name, an assumed name, or a fictitious business name) is a registration that lets you trade under something other than your legal name. You file it with a state, a county, or a city. The IRS never sees it and holds no record of it, so Line 1 has nothing it could match the trade name against. Line 2 solves the payer’s problem instead: your invoice says Raghavan Web Design, your W-9 shows Priya Raghavan on Line 1 and Raghavan Web Design on Line 2, and accounts payable can now see that these are one person. The 1099 then goes out carrying the name the IRS can match. Everybody gets what they need from a single form.
Sole proprietor or single-member LLC?
For W-9 purposes the two are treated identically, which tends to annoy people who paid a few hundred dollars to set up an LLC. Both check the first box on Line 3a. Both put the owner on Line 1 and the owner’s TIN in Part I. The LLC buys you liability protection under state law and a name to write on Line 2, and that is the extent of its effect on this form.
| Sole proprietor | Single-member LLC (no elections) | |
|---|---|---|
| Line 1 | Owner name | Owner name |
| Line 2 | DBA if any | The LLC legal name |
| Line 3a | First box | First box |
| Part I | Owner SSN or EIN | Owner SSN or EIN, never the LLC EIN |
| Liability protection | None | Yes, but that is a state-law matter with no effect on this form |
The single-member LLC page covers the differences in full.
Mistakes to avoid
- DBA on Line 1. The IRS has no record of your trade name.
- Leaving Line 3a blank because none of the boxes says “sole proprietor” in those words. The first box covers you.
- Checking the LLC box because you run a business. An LLC is a specific legal entity, and the word is not a loose synonym for “business.”
- Using an exempt payee code. Line 4 stays blank for individuals.
- Switching between your SSN and your EIN from year to year with the same client.
What gets reported about you
Your client reports payments for services on Form 1099-NEC box 1a if the year total reaches $2,000. You report gross revenue on Schedule C, subtract business expenses, and pay income tax plus self-employment tax on the profit. The 1099 total should reconcile to your own records; check it, because payers make mistakes. Your trade name appears nowhere in that chain. The 1099 carries your legal name, Schedule C carries your legal name, and the return is filed under the same number you wrote in Part I.
Frequently asked questions
My business is registered with the state. Does that change Line 1?
State registration of a trade name is not an IRS matter, so Line 1 remains your legal name. The registered name belongs on Line 2.
Can I put both my name and my business name on Line 1?
Do not. Line 1 must contain only the name attached to the TIN. Combining them creates a string the IRS cannot match.
I am a sole proprietor with employees. Which TIN?
You must have an EIN for payroll, and you may use it in Part I. Your own name still goes on Line 1.
Does the first Line 3a box really cover me if I have never heard the words sole proprietor?
Yes. If you work for yourself, have not incorporated, and have not formed an LLC, you are a sole proprietor by default. There is no filing needed to become one.
General information, not tax advice. This page explains a federal tax form in plain English. It is not legal, tax, or accounting advice, and W9Form.org is not affiliated with the IRS. Verify everything against the official Form W-9 page on IRS.gov and speak to a licensed professional about your own situation. How we source and review these pages.