Form SS-4 Without an SSN: An EIN Walkthrough for Practitioners With US-LLC Clients

A growing share of Indian founders now own single-member US LLCs, and their chartered accountants inherit the paperwork questions. The most frequent one is also the most mishandled: how does a client with no US Social Security Number obtain the company's Employer Identification Number? The public guides answer it for founders, briefly. This walkthrough answers it for the professional who has to get it right, at the level where the delays actually happen: the lines of Form SS-4, the choice of filing route, and the follow-up documents banks demand months later.

1. What the EIN is, and the one route your client cannot use

The EIN is the federal tax identification number of the entity itself, issued by the IRS without charge; it is required before the LLC can open financial accounts, complete platform onboarding, or file its US returns. The critical constraint for a non-resident owner: the IRS online application requires the responsible party to hold an SSN or ITIN. A client without one cannot use it, and the tutorials that end with "just apply online" are the single largest source of stalled formations we see referenced in professional forums. The paper-based routes below exist precisely for this population, and the process of getting an EIN without an SSN is entirely routine once the form is prepared correctly.

2. Form SS-4: the lines where applications stumble

The application itself is one page; the IRS maintains the current form and instructions on its About Form SS-4 page, and the instructions change often enough that checking them per engagement is good practice. The recurring failure points:

• Line 1, entity name. Must match the state formation document exactly, character for character. The IRS derives the name control used to match every future filing; a mismatch here surfaces months later as rejected e-filings and mismatch notices.
• Lines 7a-7b, responsible party. The responsible party is the individual who controls the entity, named personally, not a nominee or the formation agent. Where that individual has no SSN or ITIN and is ineligible to obtain one, current instructions direct entering "Foreign" in the identification field rather than leaving it blank. An ITIN is not a prerequisite for the EIN, a point clients frequently have backwards.
• Line 9a, entity classification. For a single-member LLC owned by one foreign individual and left in its default classification, the entity is disregarded for US income-tax purposes, and the instructions provide a specific designation for a foreign-owned disregarded entity filing for information-reporting purposes. Selecting a corporate box here by accident creates a classification the client did not intend.
• Third-party designee block. Completing it authorises a named person, the practitioner or the formation provider, to receive the EIN directly and answer IRS questions about the application, which shortens every route below.

3. The three filing routes, compared honestly

The current numbers and addresses for international applicants sit on the IRS page linked above and should be pulled fresh each time; they have changed before and a permanent bookmark to a stale fax number is how four-day timelines become forty. The practical counsel for client management is about sequencing: the EIN application should be lodged the day the LLC exists, because every downstream step, banking, payment platforms, marketplace onboarding, queues behind it, and the client's expectations should be set in weeks, not minutes.

4. CP 575 and the 147c letter: the documents after the number

The IRS issues the EIN confirmation notice, CP 575, exactly once; it cannot be reissued. Banks and payment platforms routinely ask for it years later, and clients routinely cannot find it. The replacement evidence is the 147c letter, an EIN verification letter the IRS provides on request to an authorised person, typically delivered by fax during the call itself. Two practice notes: first, advise clients to archive CP 575 the day it arrives, in the same folder as the formation certificate; second, when a 147c letter becomes necessary, the request must come from someone authorised with respect to the entity, so the engagement letter and authorisations should anticipate it.

5. The filing the EIN exists to feed

For a foreign-owned single-member LLC, the EIN's first real job is information reporting: the entity must file Form 5472 attached to a pro forma Form 1120 each year, disclosing reportable transactions between the company and its foreign owner, including formation capital and routine transfers. The penalty for a missed or late filing is $25,000, which converts an administrative afterthought into the most expensive line on the engagement. The classification chosen on the SS-4, the name control created by line 1, and the address on record all flow into this filing, which is why sloppiness at application time compounds. How the LLC's income is then treated in the client's Indian assessment, including treaty positions, is its own analysis and belongs in a separate, properly considered opinion rather than a paragraph here.

6. A closing checklist for the file

Entity name matched to the formation certificate before anything is filed. Responsible party named personally, identification handled per the current instructions. Classification line reviewed deliberately. Third-party designee completed. Route chosen with the client's timeline expectations set in writing. CP 575 archived on arrival, 147c procedure noted for the future, and the annual information-reporting deadline in the compliance calendar from day one. None of these steps is difficult; the professional's value is that none of them gets skipped. This article is general information for practitioners, not advice on any specific matter; positions should be confirmed against the current IRS instructions and, where Indian tax treatment is concerned, considered independently.