Quick Answer
A W-9 takes about five minutes: your legal name on line 1 exactly as it appears on your tax return, your business or trading name on line 2 if you use one, exactly one federal tax classification box ticked on line 3, line 4 left blank unless you know a code applies to you, your address, your Social Security Number or EIN in Part I, then sign and date Part II. The completed form goes back to the client who asked for it and never to the IRS, it does not expire, and it is what lets the client issue your 1099-NEC at year end. Return it promptly for one concrete reason: a payer holding no certified taxpayer identification number for you is required to apply backup withholding at 24% of what they pay you - recoverable when you file, but gone until then, on every invoice. Single-member LLC owners are the most common casualty of line 1, because the owner's name belongs there and the LLC name belongs on line 2; the mismatch that follows is the usual cause of withholding.
A client says they cannot pay you until you send a W-9. It is a one-page form and it takes about five minutes: your legal name on line 1 exactly as it appears on your tax return, your business or trading name on line 2 if you use one, one federal tax classification box ticked on line 3, the exemption line left blank unless you know it applies to you, your address, your Social Security Number or EIN in Part I, then sign and date Part II. The completed form goes back to the client who asked for it — never to the IRS — and it is what lets them issue your 1099-NEC at the end of the year. The reason to return it promptly rather than let it sit: a payer who holds no certified taxpayer identification number for you is required to apply backup withholding at 24% to what they pay you, so a missing W-9 is deducted from your invoice, not theirs. This guide walks every line, the single-member LLC name trap that catches more freelancers than any other field, the SSN-versus-EIN decision, and how to tell a real W-9 request from a phishing attempt.
What a W-9 Actually Is
Form W-9 is titled Request for Taxpayer Identification Number and Certification, and both halves of that title matter. The request half collects your name, address and taxpayer identification number. The certification half is you signing to confirm that the number is correct, that you are a US person, and that you are not subject to backup withholding. You can download the current form and its official instructions from the IRS's About Form W-9 page.
Three things about it surprise people. It is not filed with the IRS. You send it to the business that asked, they keep it in their vendor records, and the IRS never sees it unless something goes wrong later. It does not expire. There is no annual renewal; you send a fresh one when something on it changes — a new legal name, a new address, a move from your SSN to an EIN, or a new business entity. And it does not decide your employment status. Signing a W-9 does not make you a contractor any more than signing a W-4 would make you an employee; status is decided by how the work is actually controlled and performed, which the IRS sets out in its guidance on independent contractor versus employee.
One request is worth refusing: the form is for US persons. If you are a non-US freelancer with no US tax status, a W-9 is the wrong document and a client asking for one has usually reached for the only form they know. The W-8 series exists for that case. Say so rather than filling in a W-9 that does not describe you, and point the client at the instructions on the IRS page above.
Line by Line
The form is revised from time to time, so download a fresh copy from the IRS rather than reusing a PDF a client emailed you three years ago. The lines below are what each field is asking for, in order.
| Field | What to put |
|---|---|
| Line 1 — Name | Your name as it appears on your income tax return. For a sole proprietor or a single-member LLC, that is your own name, not the business's |
| Line 2 — Business name | Your DBA, trade name or single-member LLC name, if you have one. Blank if line 1 is the only name you use |
| Line 3 — Federal tax classification | Exactly one box. Most freelancers tick "Individual/sole proprietor or single-member LLC". Multi-member LLCs, S-corps and C-corps have their own boxes and their own rules |
| Line 4 — Exemptions | Blank, for almost every freelancer. The exempt payee and FATCA codes are for certain institutions and entities, not individuals doing project work |
| Lines 5 and 6 — Address | Where the payer should post your year-end form. Use the address you want tax mail to arrive at, and send an updated W-9 when you move |
| Line 7 — Account numbers | Optional. Some payers use it for a vendor or supplier reference; leave it blank if nobody asked |
| Part I — TIN | Your Social Security Number or your Employer Identification Number — one or the other, and it must be the one that belongs with the name on line 1 |
| Part II — Certification | Signature and date. An unsigned W-9 is not a W-9, and this is the single most common reason a form comes back to you |
Line 1 and the single-member LLC trap
This is the field that generates the most rejected forms, and the mistake is understandable: you formed an LLC, the LLC is who the client contracted with, so the LLC's name feels like the answer. It generally is not. A single-member LLC is by default a disregarded entity for federal income tax — the income lands on the owner's return — so line 1 wants the owner's name and line 2 is where the LLC's name belongs. Put the LLC on line 1 and the name will not match the taxpayer identification number you supply, which is precisely the mismatch that triggers an IRS notice to the payer and, downstream, withholding against you.
The classifications genuinely differ, and the official instructions are explicit about which name and which number go together for each one — read them for your own structure rather than copying what a peer did, and confirm the treatment with your accountant if your entity has elected to be taxed differently. If you have only just set the company up, the W-9 is one item on a longer list: our guide to what to do after forming an LLC covers sending every existing client a fresh W-9 alongside the EIN, the bank account and the payment rails, in the order that avoids blocking yourself.
Backup Withholding: the 24% Reason to Send It Back
Backup withholding is the mechanism that gives a W-9 request its teeth. When a payer cannot certify who they are paying, the law requires them to hold back a flat percentage of the payment and remit it to the IRS instead of sending it to you. That rate is 24%.
It is triggered by a short list of situations, and the first two are the ones freelancers walk into:
- You did not supply a taxpayer identification number. No W-9, or a W-9 with Part I left empty.
- The number you supplied does not match the name. The line 1 problem above, almost always.
- The IRS told the payer you have underreported interest or dividend income, or you failed to certify on the form that you are not subject to withholding.
The practical consequence is worth being precise about, because it is frequently overstated. Withheld money is not a penalty and it is not lost — it is credited against your federal tax bill when you file, exactly like an employee's payroll withholding, so you recover it through your return. What you lose is the use of it, for up to a year, on every invoice until the paperwork is fixed. On $40,000 of annual billings that is $9,600 sitting with the Treasury instead of in your account, which is a cash-flow problem of a serious size for a business that was already waiting 30 days to be paid. Returning a form that takes five minutes is a better trade.
The corollary for anyone who hires help: the obligation runs the other way too. If you subcontract, you are the payer, and the W-9 belongs on file before the money moves rather than in January when you are trying to issue forms. Our guide on what to do when you receive an invoice covers that step from the paying side, along with the checks that catch an invoice-shaped solicitation before it is paid.
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SSN or EIN?
If you are a sole proprietor with no employees, you are entitled to use your Social Security Number, and plenty of freelancers do for years without incident. The case for getting an EIN instead is mostly about how many strangers end up holding your SSN. Every client who pays you keeps your W-9 in their vendor records; so does their bookkeeper, their accounts-payable platform, and whoever inherits the files when the finance manager leaves. An EIN is a number that identifies your business rather than your person, and it does the same job on the form.
It is also free and immediate. The IRS issues EINs at no charge through its online EIN application, usually in one sitting — so treat any service charging a fee to "obtain" one for you as selling you something you can get yourself. Two cautions. Getting an EIN does not change your tax classification or your filing obligations; a sole proprietor with an EIN is still a sole proprietor. And the pairing rule from line 1 still applies: the number has to belong with the name you entered, so if you are a single-member LLC owner using an EIN, check against the official instructions which EIN — the LLC's or your own — the form expects in your situation.
Whichever you use, send the form in a way you would be comfortable with for any document carrying a tax ID: a secure upload link or a portal if the client offers one, rather than an unencrypted attachment emailed to an address you have never written to before. For the tax background on the structure choice itself, our guide to freelancer versus contractor status and what each means for tax and invoicing is the better starting point.
When a W-9 Request Is a Scam
A form that collects a full legal name, an address and a Social Security Number is an obvious target, and W-9 phishing is common enough to be worth thirty seconds of checking. Because a genuine request is so routine, the fake ones work by looking routine too.
- You have no relationship with the sender. A W-9 request from a company you have never invoiced is a request for your SSN from a stranger.
- It arrives as a link to a form rather than the IRS PDF. A real payer sends you the form, or asks you to upload it to a portal you already use. A web form harvesting a TIN is not how this works.
- It claims to be from the IRS. The IRS does not email you asking for a W-9. The form goes to a payer, and the agency does not initiate contact that way.
- It is urgent, and the urgency is doing the work. "Payment is being held today" is the oldest lever there is.
The check is the same as for any payment-adjacent request: verify through a channel you already had. Reply to an existing thread with that client, or call the number you have used before — not one in the new message. If a real client's email account has been compromised, that is also the moment you find out, before you have handed your taxpayer ID to whoever is reading their mail.
What Happens After You Send It
The client files your W-9 in their vendor records and uses it twice. First, to release payment: in any organisation with a formal accounts-payable function, a vendor record without a certified TIN often cannot be paid at all, which is why the request usually arrives attached to your first invoice. Second, at year end, to issue your 1099-NEC — the form reporting what they paid you, sent to you and filed with the IRS.
Two things follow from that, and both catch people out. The reporting threshold has moved: it sat at $600 for decades, and legislation passed in 2025 raised it to $2,000 for payments made from 2026 onward, with inflation adjustment after that. Because the figure changes, check current IRS guidance for the year you are actually filing rather than a number you remember — our 1099 form definition tracks the current position. And a 1099 you never receive changes nothing about what you owe: freelance income is reportable whether or not a form arrives, so your own records are the ones that matter. The IRS's recordkeeping guidance expects gross receipts to be supported by documents showing the amount and source of each one, and your invoices are that evidence; our guide to freelance tax deductions covers the other side of the same ledger.
InvoiceBloom does not collect, store or issue W-9s, and it does not produce 1099s — those are the payer's documents and they live in the client's accounting system, not in an invoicing tool. What it does is the invoice itself: free, with every feature included, and the free invoice generator will produce a finished PDF without an account at all. Keep the W-9 you sent with the client's file anyway, with a note of the date, so that next January you know which clients hold a current one.
Frequently Asked Questions
Do I have to fill out a W-9 for every client?
For every US business client who asks, yes, and most will ask before releasing your first payment. It is a routine vendor-onboarding step rather than a sign anything is unusual. You do not need to send one to an individual paying you personally for personal services, and you send a fresh one to an existing client only when something on it changes — a new name, address, entity or taxpayer identification number. Keep a current PDF saved so each request takes a minute rather than an evening.
What happens if I do not send a W-9?
The payer is required to apply backup withholding at 24% to your payments and remit it to the IRS, and in practice many accounts-payable systems simply will not release a payment to a vendor record without a certified taxpayer identification number, so the invoice stalls instead. The withheld money is not a penalty and is not lost — it is credited against your federal tax when you file, the way payroll withholding is for an employee — but you are without it until then, on every invoice, until the form is on file.
Should I put my LLC name on line 1 of the W-9?
Generally not, if it is a single-member LLC. That kind of LLC is by default a disregarded entity for federal income tax, so the form wants the owner's name on line 1 and the LLC's name on line 2. Putting the LLC on line 1 creates a name-and-number mismatch, which is the usual cause of an IRS notice to the payer and of withholding against you. Multi-member LLCs and entities that have elected corporate or S-corporation treatment follow different rules, so check the official W-9 instructions for your structure, or ask your accountant.
Can I use an EIN instead of my Social Security Number on a W-9?
Yes, and it is worth considering purely on privacy grounds, because every client who pays you keeps your W-9 on file. An EIN identifies the business rather than you, the IRS issues them free through its online application, and it usually takes one sitting. It does not change your tax classification: a sole proprietor with an EIN is still a sole proprietor, filing the same way. The one thing to get right is the pairing — the number you give has to belong with the name you entered on line 1.
Does signing a W-9 mean I am a contractor rather than an employee?
No. The form collects and certifies your taxpayer information; it does not classify you. Worker status turns on how the work is actually directed and performed — who controls the hours, the methods, the tools and the business relationship — and the IRS publishes guidance on the tests it applies. If you are being treated as an employee in every respect but paid against invoices, signing a W-9 neither creates nor cures that; it is a separate question and worth advice of its own.
Is it safe to email a completed W-9?
Treat it the way you would any document carrying a tax identification number. Use the client's secure portal or an upload link if one exists, and if you must email it, send it to an address on an existing thread with someone you have dealt with before rather than to a new contact who approached you. Verify any unexpected request through a channel you already had — reply to an old thread, or call a number you have used before — because the request is also a standard phishing pretext, and an EIN in place of your SSN reduces what a bad copy is worth.
The Short Version
- A W-9 goes to the client who asked for it, not to the IRS, and it does not expire — you resend it when your details change.
- Line 1 is your name as it appears on your tax return. For a sole proprietor or single-member LLC that is your own name; the business name goes on line 2.
- Tick exactly one box on line 3, leave line 4 blank unless you know a code applies, and sign Part II — an unsigned form comes straight back.
- No certified taxpayer identification number means backup withholding at 24% of your payments, recoverable when you file but gone until then.
- An EIN is free from the IRS and keeps your Social Security Number out of every client's vendor file. It does not change how you are taxed.
- A W-9 request from a stranger, as a web form, or supposedly from the IRS itself, is a phishing attempt. Verify on a channel you already had.
- The W-9 is what lets the client issue your 1099-NEC — and your income is reportable whether or not that form ever arrives.