Does a single-member LLC use the owner's SSN or its own EIN?

Either can apply. A single-member LLC may use the owner's SSN on the W-9, or it may obtain an EIN and use that instead. The key is consistency — the name on line 1 and the TIN must match IRS records for the chosen reporting identity.

What box does a disregarded LLC check on the W-9?

Check 'Limited liability company' and enter the tax classification — typically 'S' for a single-member LLC owned by an individual (disregarded entity) or 'P' if the LLC has multiple members taxed as a partnership.

Is a disregarded entity exempt from 1099 reporting?

No. Payments to a disregarded entity are generally reportable on Form 1099-NEC or 1099-MISC using the name and TIN on the W-9. The entity's disregarded status affects how the owner reports income on their return — not whether you issue an information return.

What if the LLC later adds a member?

A multi-member LLC is taxed as a partnership by default and must update its W-9 accordingly — new classification, and often a new EIN. Request an updated W-9 before the next reportable payment.

Guide

What Is a Disregarded Entity on Form W-9?

By Keelstar Team · Updated July 11, 2026

The short answer

A disregarded entity is a business entity that the IRS treats as separate from its owner for legal purposes but not for federal tax purposes — most commonly a single-member LLC owned by an individual. On Form W-9, the entity checks the LLC box, indicates single-member LLC status, and provides the owner's name and TIN (typically the owner's SSN) unless the LLC has its own EIN and elects to be treated differently. AP teams must confirm the classification box, the name on line 1, and whether the TIN belongs to the individual owner or the entity — mismatches here are a leading source of 1099 errors.

What 'disregarded entity' means for tax purposes

Under IRS rules, a single-member LLC is generally disregarded — meaning the entity itself does not file a separate federal income tax return. Income passes through to the owner, who reports it on Schedule C or other applicable forms. For W-9 purposes, the LLC still completes the form, but the TIN and name may reflect the individual owner rather than a separate corporate identity.

How disregarded entities complete the W-9

Line 1 should show the owner's name as required by the form instructions — or the LLC's legal name if the LLC has an EIN and uses it. Line 2 can show the LLC name. Check the LLC box in line 3 and enter the tax classification code. Part I carries the TIN — SSN of the individual owner or the LLC's EIN, depending on what the vendor uses for tax filing.

LLC box checked with classification code
Owner name or LLC legal name on line 1 per instructions
LLC name on line 2 when applicable
SSN or EIN in Part I matching IRS records

Common AP mistakes with disregarded entities

Teams often treat a single-member LLC like a corporation — skipping 1099 reporting — or report payments under the DBA on invoices instead of the W-9 legal name. Another error: accepting an EIN on the W-9 but filing the 1099 under a name that does not match that EIN in IRS records. Always file using the name/TIN combination on the validated W-9.

When to request clarification

If the W-9 shows an LLC name on line 1 with an individual's SSN, or an EIN with a name that does not match your vendor master, ask the vendor to confirm their federal tax classification before payment. A two-minute email at onboarding prevents a B-notice at year-end.

Disregarded entities owned by corporations

A single-member LLC owned by a corporation (not an individual) is disregarded for tax purposes but the TIN is typically the corporate owner's EIN. Classification and reporting differ from the individual-owned case. Review the W-9 classification box carefully — do not assume every single-member LLC uses the owner's SSN.

Document and validate at intake

Flag LLC vendors in your vendor master and apply a validation checklist: LLC box checked, classification code present, name/TIN consistency verified. Run TIN matching before 1099 filing. When entity structure changes — new member, S-corp election — trigger an automatic W-9 re-collection request.

Frequently asked questions

Does a single-member LLC use the owner's SSN or its own EIN?: Either can apply. A single-member LLC may use the owner's SSN on the W-9, or it may obtain an EIN and use that instead. The key is consistency — the name on line 1 and the TIN must match IRS records for the chosen reporting identity.
What box does a disregarded LLC check on the W-9?: Check 'Limited liability company' and enter the tax classification — typically 'S' for a single-member LLC owned by an individual (disregarded entity) or 'P' if the LLC has multiple members taxed as a partnership.
Is a disregarded entity exempt from 1099 reporting?: No. Payments to a disregarded entity are generally reportable on Form 1099-NEC or 1099-MISC using the name and TIN on the W-9. The entity's disregarded status affects how the owner reports income on their return — not whether you issue an information return.
What if the LLC later adds a member?: A multi-member LLC is taxed as a partnership by default and must update its W-9 accordingly — new classification, and often a new EIN. Request an updated W-9 before the next reportable payment.

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