What Form W-9 actually does
Form W-9 answers one question for the business paying you: whose taxpayer identification number goes on the 1099 we have to file, and is that person a U.S. person? Every field on the page serves that question and nothing else. You supply four things: your legal name, your entity type, your address, and your taxpayer identification number. Then you sign under penalties of perjury that the number is right and that you are a U.S. person. No arithmetic, no tax computed, nothing to attach. A few minutes with a pen is enough, and the payer walks away with everything it needs to file an accurate information return in January. Three consequences follow, and between them they explain almost every rule on this site.
- The form stays with the payer. It is an internal record. You give it to the requester and nobody mails it to the IRS.
- A correct form means no withholding. Get it right and you are paid gross. A missing or unsigned one forces the payer into 24% backup withholding.
- The name and the number have to match. The IRS matches the pair on the 1099 against its own records. A mismatch generates a B notice and, eventually, withholding. See TIN matching.
The most common error on the form is putting a business name on Line 1. Line 1 belongs to whoever owns the TIN in Part I. For a sole proprietor or a single-member LLC that is your own legal name, and the business name goes on Line 2. See the other twelve mistakes.
The form, line by line
Seven numbered lines and two parts, all on a single page. The map below gives each field, what it wants from you, and a link to the detail page for the places where it gets complicated.
Find your situation
Line 1, Line 2, Line 3a and Part I all shift depending on how your business is set up, and that is where most of the real confusion lives. Each entity type below gets its own page with the exact entries.
- Independent contractor
The default case: your own name on Line 1, SSN or EIN in Part I.
- Sole proprietor
Your name on Line 1, your DBA on Line 2, first box on Line 3a.
- Single-member LLC
Leave the LLC box alone; this is the one almost everybody gets wrong.
- Multi-member LLC
Check LLC and enter C, S or P. The letter matters.
- S corporation
Corporate name, EIN, and an exempt payee code you can use.
- C corporation
Generally exempt from 1099 reporting, yet still asked for a W-9.
- Partnership
Includes the new Line 3b foreign-partner question.
- Nonprofit / 501(c)(3)
Which Line 3a box, and exempt payee code 1.
- Trust or estate
Grantor trusts, irrevocable trusts and decedents' estates.
- Landlord
Rent, property managers and Form 1099-MISC box 1.
- Gig worker
Rideshare, delivery and marketplace platforms, plus 1099-K.
- Attorney or law firm
Gross proceeds, settlements, and the reason corporations get 1099s anyway.
What changed for the 2026 tax year
Two changes matter if you fill in or collect W-9s this year. The form itself is untouched by both of them; what moves is the reporting that sits on the other side of it.
The One Big Beautiful Bill Act raised the general information-reporting threshold in IRC section 6041 from $600 to $2,000 for payments made after December 31, 2025, the first increase since 1954. From 2027 the figure is indexed for inflation. That is a real change for anyone who takes on a lot of small jobs, because a client who pays you a few hundred dollars for an afternoon of work now has nothing to file. It does not follow that the paperwork disappears. Backup withholding attaches to reportable payments, so the withholding exposure tracks the same threshold from inside it, and a payer who waits to see whether you cross the line has already left it too late. Hence the request that lands in your inbox before the first invoice is paid, when nobody yet knows what the annual total will be. Full breakdown of the 2026 changes, including the draft Rev. June 2026 form.
Rules that catch people out
- Backup withholding
What triggers it, how it stops, and how to recover it on your return.
- Penalties
$50 for a missing TIN, $500 for a false certification, and worse.
- Does a W-9 expire?
It has no expiration date, but four events make yours invalid.
- Electronic signatures
When an e-signed W-9 is valid, and the requirements a system must meet.
- Substitute Form W-9
When a client sends its own version, and whether you have to use it.
- Sending it securely
Better channels for your SSN than a plain email attachment.
W-9 versus the forms people confuse it with
| Form | Who completes it | What it does | Compare |
|---|---|---|---|
| W-9 | A U.S. contractor, vendor or account holder | Reports a name and TIN to the payer; no withholding | — |
| W-4 | An employee | Sets income tax withholding from payroll | W-9 vs W-4 |
| W-2 | The employer | Year-end wage and withholding statement | W-9 vs W-2 |
| 1099-NEC | The payer, not the worker | Year-end report of what a contractor was paid | W-9 vs 1099 |
| W-8BEN | A foreign individual | Claims non-U.S. status and treaty benefits | W-9 vs W-8BEN |
If you are the one requesting W-9s
Collecting the form is its own compliance job, with its own rules: when to ask, what to do about a refusal, how to validate a TIN before you file, and what a valid substitute form has to contain. Most of it is procedural, and most of the pain comes from doing it late.
- Get the timing and the wording right the first time. How to request a W-9, with a template you can paste
- A vendor who stonewalls you does not stop your filing obligation. Here is the procedure
- Check the name and number against IRS records before the return goes out, using TIN matching
- If you collect on your own paperwork, the substitute Form W-9 rules govern what it must say
- Electronic collection is fine once your system meets four specific conditions
Frequently asked questions
What is a W-9 form used for?
Form W-9 is how a U.S. person hands their legal name and taxpayer identification number to a business that is about to pay them. The payer files it away and keeps it, and uses what is on it to prepare year-end information returns such as Form 1099-NEC. It never goes to the IRS.
Do I have to pay tax on the W-9 itself?
No. Form W-9 does not calculate or withhold any tax; it only collects information. The tax consequences show up later, when the payer reports what it paid you on a Form 1099 and you report that income on your own return.
Is the W-9 form free?
Form W-9 is published by the IRS and sits in the public domain, so nobody should charge you for a blank copy. You can download the current revision here at no cost.
What is the current version of Form W-9?
The current official revision is Form W-9 (Rev. March 2024), and the revision date is printed in the upper-left corner of the form. The IRS has also released a draft Rev. June 2026 version, but a draft is marked "DO NOT FILE" and must not be used until the IRS publishes it as final. See what changed for 2026.
Who asks me for a W-9?
Any business that pays you outside of payroll: clients who hire you as a contractor, a company that pays you rent, a bank that pays you interest, a brokerage, a marketplace, an insurer settling a claim, or a law firm handling a settlement. The pattern is money moving to you without a paycheck attached. See the full list of who has to fill one out.
What happens if I refuse to give a W-9?
The payer is required to start backup withholding at 24% on reportable payments, and you can be charged a $50 penalty per failure under IRC section 6723. Refusing does not make the income invisible to the IRS.
Does a W-9 expire?
Form W-9 has no expiration date. It stays valid until something on it changes, such as your name, your entity type, or your TIN. Many payers still refresh their files every one to three years as a control, so expect the occasional request for a fresh copy from a client you have worked with for years. Full answer here.
Where do I send a completed W-9?
To the person or business that asked for it, and only to them. Do not mail it to the IRS. The form carries your Social Security number, so use a channel the requester controls: their vendor portal, an encrypted upload, an accounting system invitation. Plain email is the weakest option people reach for first. Safer ways to send it.
See all frequently asked questions, or browse the glossary of W-9 and 1099 terms.
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.