File Form SS-4 if the applicant entity doesn’t already have an EIN but is required to show an EIN on any return, statement, or other document.1 See also the separate instructions for each line on Form SS-4.
| started a new business | doesn’t currently have (nor expect to have) employees | complete lines 1, 2, 4a–8a, 8b–c (if applicable), 9a, 9b (if applicable), 10–14, and 16–18. |
| hired (or will hire) employees, including household employees | doesn’t already have an EIN | complete lines 1, 2, 4a–6, 7a–b, 8a, 8b–c (if applicable), 9a, 9b (if applicable), and 10–18. |
| opened a bank account | needs an EIN for banking purposes only | complete lines 1–5b, 7a–b, 8a, 8b–c (if applicable), 9a, 9b (if applicable), 10, and 18. |
| changed type of organization | either the legal character of the organization or its ownership changed (for example, you incorporate a sole proprietorship or form a partnership)2 | complete lines 1–18 (as applicable). |
| purchased a going business3 | doesn’t already have an EIN | complete lines 1–18 (as applicable). |
| created a trust | the trust is other than a grantor trust or an IRA trust4 | complete lines 1–18 (as applicable). |
| created a pension plan as a plan administrator5 | needs an EIN for reporting purposes | complete lines 1, 3, 4a–5b, 7a–b, 9a, 10, and 18. |
| is a foreign person needing an EIN to comply with IRS withholding regulations | needs an EIN to complete a Form W-8 (other than Form W-8ECI), avoid withholding on portfolio assets, or claim tax treaty benefits6 | complete lines 1–5b, 7a–b (SSN or ITIN as applicable), 8a, 8b–c (if applicable), 9a, 9b (if applicable), 10, and 18. |
| is administering an estate | needs an EIN to report estate income on Form 1041 | complete lines 1–7b, 9a, 10–12, 13–17 (if applicable), and 18. |
| is a withholding agent for taxes on nonwage income paid to an alien (that is, individual, corporation, or partnership, etc.) | is an agent, broker, fiduciary, manager, tenant, or spouse who is required to file Form 1042, Annual Withholding Tax Return for U.S. Source Income of Foreign Persons | complete lines 1, 2, 3 (if applicable), 4a–5b, 7a–b, 8a, 8b–c (if applicable), 9a, 9b (if applicable), 10, and 18. |
| is a state or local agency | serves as a tax reporting agent for public assistance recipients under Rev. Proc. 80-4, 1980-1 C.B. 5817 | complete lines 1, 2, 4a–5b, 7a–b, 9a, 10, and 18. |
| is a single-member LLC (or similar single-member entity) | needs an EIN to file Form 8832, Entity Classification Election, for filing employment tax returns and excise tax returns, or for state reporting purposes8, or is a foreign-owned U.S. disregarded entity and needs an EIN to file Form 5472, Information Return of a 25%Foreign-Owned U.S. Corporation or a Foreign Corporation Engaged in a U.S. Trade or Business | complete lines 1–18 (as applicable). |
| is an S corporation | needs an EIN to file Form 2553, Election by a Small Business Corporation9 | complete lines 1–18 (as applicable). |
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