W-9 Form Explained: How to Fill It Out Correctly
A client asks you for a W-9 Form, and a few short fields leave you wondering whose name belongs on it: yours or your business’s. Then you reach the tax classification box and the request for a Social Security number or employer identification number. It’s a routine request, but those choices depend on how the IRS treats you or your business for federal tax purposes.
For an LLC, the name registered with the state doesn’t settle every entry. Your federal tax treatment determines which name and classification to use. The instructions below explain how to choose the right entries and return the completed document safely.
Respuesta rápida
The legal name on your W-9 Form identifies the taxpayer for IRS reporting of payments or other amounts. Use that taxpayer’s federal tax classification and Social Security number or employer identification number. Read the applicable certification instructions for your payment; some transactions require a signature, while others require only the correct taxpayer ID. The completed form goes to the requester, not the IRS.
Descargar el official IRS form and its instructions.
What is a W-9 Form and why were you asked for one?
Form W-9, officially called Request for Taxpayer Identification Number and Certification, gives a requester the tax information needed to prepare an information return, such as a Form 1099. Under Orientación del IRS, the requester uses it to identify who received a payment or another reportable amount. If you’re an independent contractor, a client may ask for it so they have your details for reporting what they pay you.
The request isn’t limited to contract work. A bank may need the same information to report interest from a financial account. You provide your details and the applicable certifications; the requester handles any required information return. Send the completed document back to that requester. You don’t routinely file it with the IRS.
Who needs to complete a W-9?
If you’re a U.S. taxpayer, you may need to complete the form for a payer or financial institution. Under the Instrucciones del IRS, a W-9 Form commonly comes up for:
- Independent contractors and freelancers paid for services.
- Sole proprietors and U.S. business entities, including LLCs whose tax treatment determines how they complete it.
- Account holders providing information for interest reporting.
A small payment doesn’t rule out a request. The payer may collect your details before knowing whether total payments will require a Form 1099. The reporting threshold isn’t a minimum amount for requesting this document.
Foreign individuals may instead need Form W-8BEN, depending on their tax status and circumstances. That alternative doesn’t apply to every foreign entity or payment situation.
How to fill out a W-9 Form correctly
Start with the taxpayer named on Line 1. Your W-9 Form classification and identification number must match that taxpayer. Use the instrucciones oficiales for these eight fields:
- Línea 1: Write the name recognized for federal tax purposes. Sole proprietors enter their own name; LLC owners should check the LLC guidance below.
- Line 2: Your trade name, DBA (doing business as) name or disregarded LLC name belongs here if different. A disregarded LLC isn’t separate from its owner for federal income taxes.
- Línea 3a: Choose one box based on Line 1’s taxpayer. State LLC registration alone doesn’t tell you which federal classification to select.
- Line 3b: Check this box if you’re a partnership, trust, estate or LLC taxed as a partnership with direct or indirect foreign partners, owners or beneficiaries, and you’re giving the form to a partnership, trust or estate in which you own an interest.
- Línea 4: Leave exemption codes blank unless you qualify. Most individuals don’t need them.
- Lines 5–7: Enter your mailing address, including city, state and ZIP code. Account numbers and requester information are optional.
- Parte I: Supply the named taxpayer’s SSN, individual taxpayer identification number (ITIN) or EIN. The SSN/EIN section below explains which identification number to use.
- Parte II: Follow the certification instructions for your payment. See the signature section below for signing requirements and any needed certification changes.
Which name and tax classification should your LLC use?
Your LLC’s federal tax treatment controls these entries. If the IRS treats the business as part of its owner, the owner’s name belongs on Line 1. Line 2 holds the LLC’s name. The IRS classification instructions base Line 3a on that taxpayer. Your W-9 Form may identify the owner or the LLC, depending on its tax treatment.
| Tax treatment | Name on Line 1 | Line 3a selection |
|---|---|---|
| Disregarded single-member LLC owned by an individual | Owner's name | Individual/sole proprietor |
| LLC taxed as partnership | LLC's legal name | LLC; enter P |
| LLC taxed as S corporation | LLC's legal name | LLC; enter S |
| LLC taxed as C corporation | LLC's legal name | LLC; enter C |
The first row covers a disregarded LLC owned by an individual. An entity-owned disregarded LLC follows its owner’s classification instead, so don’t automatically check Individual/sole proprietor. Your state registration won’t tell you whether a corporate tax election applies to you. Your IRS election records should support an S or C classification. The LLC exists because you completed constitución de empresas under state law; its federal tax treatment is a separate question that state documents don’t settle.
Should you enter your SSN or EIN?
Generally, use your Social Security number (SSN) if you’re completing the form as an individual, unless an individual taxpayer identification number (ITIN) applies. A sole proprietor with an EIN can use either number. The name on Line 1 tells you whose tax ID belongs in Part I of your completed W-9 Form. For business entries:
- A disregarded LLC uses its owner’s appropriate tax ID, even if the LLC has a separate EIN.
- Corporations and partnerships ordinarily enter the entity’s EIN.
El TIN instructions explain the required name-and-number combinations. Compare your entry with your Social Security record or IRS EIN records if you’re unsure. For IRS proof of an existing business EIN, Verificación del EIN through Letter 147C confirms the number already assigned. It doesn’t issue a new EIN or automatically fix a mismatch.
Do you have to sign a W-9?
You don’t have to sign a W-9 Form for every transaction. Signing Part II confirms your tax ID, U.S. status, withholding status and applicable reporting exemptions on the form. The certification instructions explain when a correct tax ID is enough and when you must sign. If the IRS notified you of withholding for underreported interest or dividends, cross out item 2 before signing.
A handwritten signature isn’t always necessary. The requester may use a system that accepts electronic signatures, provided it meets the IRS electronic submission rules.
Where do you send a completed W-9?
Return the W-9 Form to whoever requested your tax information after confirming that the request is legitimate. The IRS doesn’t receive this form from you. Your requester keeps the information for tax reporting.
If you don’t recognize the person or business requesting your SSN or EIN, ask why it needs the completed form and confirm the delivery address before you share your tax information. Use a secure delivery method the requester accepts. Electronic collection is allowed through qualifying systems; see the IRS requester instructions for requirements covering the submitted information and the sender’s identity.
Keep your copy with the delivery record so you can later check which information you provided. If you’re unsure the form arrived, confirm receipt. Report any changes to your name, tax ID or other required details.
What happens if your W-9 information is missing or wrong?
The payer may ask you to correct your W-9 Form or withhold tax when required.
| Situación | Acción |
|---|---|
| Typo before sending | Check Line 1 and Part I, then correct the entry before returning the form. |
| Wrong TIN noticed after sending | Contact the payer with a corrected form. It needs the right information in its records. |
| Payer sends a B-notice | The first notice generally requires a signed form. For a second B-notice within three calendar years, follow its verification instructions, such as providing IRS Letter 147C for an EIN. |
| Backup withholding begins | Find out which requirement you haven't satisfied. Another form alone may not resolve it. |
A missing tax ID, name/number mismatch or incorrect certification can lead to 24% retención de respaldo, tax deducted from covered payments. A typo doesn’t automatically cause this. The IRS sends CP2100 or CP2100A to the payer when reported information doesn’t match its records. The payer checks its records before sending a required correction request under the B-notice rules.
Does completing a W-9 mean you owe taxes or will receive a 1099?
No. Filling out a W-9 Form supplies taxpayer information; it doesn’t establish an income tax bill or guarantee a 1099. A business may collect the form before knowing whether its payments will require reporting. Qualifying 2026 nonemployee payments have a $2,000 1099-NEC reporting threshold. The comparable threshold before 2026 was $600. See the IRS reporting rules for the requirements. Later years may use inflation-adjusted thresholds.
Even below that threshold, income may be taxable. The amount you owe depends on your tax situation rather than whether a 1099 arrives. For nonemployee compensation, the payer must file Form 1099-NEC if it withheld federal income tax under the backup withholding rules, regardless of the payment amount. Independent contractors must determine how to report their earnings and what they owe in federal income and impuestos para trabajadores autónomos.
W-9 vs. W-4 vs. 1099: what is the difference?
Your W-9 Form identifies the taxpayer receiving payments. Employee withholding and the payer’s reporting belong on different forms.
| Formulario | Para qué sirve | Who usually completes or files it |
|---|---|---|
| W-9 | Supplies a name, tax ID and certifications. | Payment recipient returns it to the requester. |
| W-4 | Directs federal income tax withholding from employee pay under the Form W-4 guidance. | Employee completes it for the employer. |
| 1099-NEC | Reports qualifying payments for nonemployee services. | Payer files with the IRS and provides the recipient's copy. |
Receiving a tax form doesn’t establish whether you’re an employee or contractor. Review that question separately. For employers, servicios de nómina can include processing employee pay and withholding. Check whether your agreed scope also covers contractor information returns.
When should your tax classification get a closer review?
An uncertain LLC classification needs review before you return the W-9 Form. Don’t guess whether the owner or the LLC belongs on Line 1. Under the classification instructions, a disregarded LLC uses its owner’s tax classification; an LLC taxed as an S or C corporation uses its own.
Bring your EIN confirmation and tax election records if business documents don’t match federal records. With several entities or owners, confirm whose records you’re comparing. A payer asking repeatedly for corrected information is another reason to have someone review the name and classification.
Preguntas frecuentes
Can I refuse to provide a W-9?
You can decline but the requester may need your tax ID and certifications to report payments. Refusal can affect payment processing and the IRS backup withholding rules may require tax deductions from covered payments when you haven’t supplied a valid number.
Does a W-9 Form expire?
A new calendar year doesn’t automatically invalidate the form. Update it when your name, tax ID or relevant tax status changes, and follow legitimate requests for updated information. The IRS requester instructions explain the information a payer needs for reporting.
What if you have not received an SSN or EIN yet?
Apply for the number and enter “Applied For” in the tax ID space, then sign and date the form. The TIN application rules allow a limited grace period for certain payments. Ordinary contractor payments don’t qualify for that protection just because your application is pending.
How can you check the current W-9 Form?
Use the IRS about-form page to open the published PDF and check its revision date. The current IRS revision is March 2024. A draft posted for review isn’t a required replacement for the published form; use the official version available there.
Check these details before returning your W-9
Your W-9 Form should agree with the taxpayer’s tax records.
- Check Line 1 for the legal name, with any different business or DBA name on Line 2.
- An LLC’s federal tax treatment determines the classification entry. Don’t choose based only on its business name.
- Use the SSN or EIN belonging to the taxpayer you’ve named on Line 1.
- Verify the mailing address. Check applicable exemptions and the certification requirements for signing this form.
- Confirm who requested your information before choosing secure delivery.
If elections remain uncertain or mismatches keep recurring, ask your preparer to review business records when included in your preparación de declaraciones de impuestos compromiso.
