Harmonious

How to get an EIN for an LLC

An Employer Identification Number is the federal tax ID the IRS assigns to a business entity. An LLC needs one to open a bank account, run payroll, issue equity, and file returns. The application itself is Form SS-4, it is free, and the hard part is getting the details to line up with the state record and with how you intend to be taxed.

The six steps

  1. 1

    Form the LLC first

    The IRS issues the EIN to a legal entity. File the articles of organization with the state and get the stamped formation certificate before you apply, so the legal name and formation date on the SS-4 match the state record exactly.

  2. 2

    Decide who the responsible party is

    The responsible party is the individual who ultimately controls the entity - not an attorney, not a formation agent. Only a natural person qualifies, and the IRS limits each responsible party to one EIN issued per day.

  3. 3

    Choose the tax classification

    A single-member LLC defaults to a disregarded entity, a multi-member LLC to a partnership. Electing S-corp or C-corp treatment is a separate filing (Form 2553 or 8832) but the SS-4 answers should be consistent with the election you intend.

  4. 4

    Complete Form SS-4

    Legal name, trade name, mailing and principal address, county and state of organization, responsible party name and SSN/ITIN/EIN, reason for applying, start date of the business, expected employees, and principal activity.

  5. 5

    File through the right channel

    The IRS online assistant issues an EIN immediately for applicants with an SSN or ITIN. Fax filing generally returns the EIN in about four business days; mail can take four to five weeks. International applicants without an SSN or ITIN apply by phone or fax.

  6. 6

    Store the CP 575 notice

    The CP 575 confirmation is what banks, payroll providers, and brokers ask for. Keep it with the formation documents - the IRS will not reissue it, only a replacement 147C letter.

What gets applications rejected

  • • Legal name on the SS-4 does not exactly match the state filing - a common rejection cause.
  • • Naming a formation company or lawyer as the responsible party instead of a controlling individual.
  • • Applying before the state approves the formation, so the entity does not yet legally exist.
  • • Hitting the one-EIN-per-responsible-party-per-day limit when spinning up several entities at once.
  • • Selecting the wrong reason for applying, which can trigger unnecessary employment-tax filing expectations.
  • • Applying for a second EIN after a name change - a name change is an update, not a new EIN.

Form SS-4 and its instructions are published by the IRS. Processing times are the IRS's own published estimates and can change during peak filing periods.

After the EIN arrives

  • • Open the operating bank account - the EIN and CP 575 are prerequisites at almost every bank.
  • • Register for state tax accounts and any payroll withholding accounts you need.
  • • Set the cap table's start of record: founder shares or units, vesting, and the 83(b) clock.
  • • If you plan to raise, line up the offering exemption before you take the first check.

Keep formation and EIN records in one place

Harmonious offers EIN application support for clients: our team prepares the SS-4, coordinates the submission with the responsible party, and keeps the IRS EIN letter alongside the formation documents. Your fund setup records each step and its outcome.

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