An employer identification number, or EIN, identifies your business for federal tax purposes. Getting one is usually straightforward, but applying before your LLC exists, using the wrong responsible party, or requesting a second number can create avoidable problems. This guide explains when you need an EIN for LLC operations, how to apply, how to correct common mistakes, and which California requirements remain separate from your federal tax ID.
When do you need an EIN for an LLC?
An EIN is a nine-digit number issued by the Internal Revenue Service. Despite its name, it is not limited to employers. Corporations, partnerships, and many LLCs need one even when they have no employees.
For an LLC, the answer depends partly on its federal tax classification:
- Multi-member LLC: An LLC taxed as a partnership generally needs its own EIN.
- LLC taxed as a corporation: An LLC electing corporate tax treatment generally needs an EIN.
- Single-member LLC: An LLC treated as a disregarded entity generally does not need a separate EIN for federal income tax purposes if it has no employees and no applicable excise tax obligations.
- Employees or certain excise taxes: A disregarded LLC generally needs its own EIN for employment tax and applicable excise tax reporting.
A bank may require an EIN to open a business account even when federal tax rules do not require one. Some special reporting rules also apply to foreign-owned single-member LLCs. Confirm the requirements for your ownership structure rather than assuming every one-owner business follows the same rules.
An EIN does not create an LLC or provide liability protection. Those issues begin with proper California business formation and the way you operate the company.
How to apply for an EIN for LLC operations
Form your LLC with the appropriate state agency before applying. For a California LLC, that ordinarily means filing Articles of Organization with the California Secretary of State. Use the entity’s actual legal name, not just its storefront name or website address.
- Confirm the details. Gather the legal name, mailing address, formation information, member count, and reason for applying.
- Identify the responsible party. This generally means the individual who ultimately owns, controls, or exercises effective control over the entity. A filing service or nominee should not be listed merely because it submits the application.
- Choose the appropriate application method. Eligible applicants can use the IRS online application. Others may need to submit Form SS-4 by fax or mail, or follow the IRS procedures for international applicants.
- Save the confirmation. Keep the EIN assignment notice with your formation documents and tax records.
The IRS issues EINs without an application fee. A private service may charge for assistance, but that is not an IRS charge. Online eligibility generally requires a principal business location in the United States or its territories and a valid taxpayer identification number for the responsible party.
Review every answer before submitting. An EIN application does not replace a separate tax election, such as an election for S corporation treatment.
Fixing mistakes and finding a missing EIN
If you already applied, first determine whether the problem is a missing document or incorrect IRS information. Do not submit another application simply because you cannot find the original notice.
- Missing EIN: Check the assignment notice, prior tax returns, bank records, and records held by your accountant. An authorized person can contact the IRS to request confirmation, commonly through a 147C letter.
- Incorrect business name: Follow the IRS name-change or correction procedure for your entity and tax classification. Depending on the circumstances, this may involve a tax return notation or a signed letter.
- New address or responsible party: Form 8822-B is used to report changes to a business mailing address, business location, or responsible party. Responsible-party changes must be reported within 60 days.
- Duplicate EINs: Ask the IRS which number should remain associated with the business and how to correct its records.
Changing your information with the Secretary of State does not automatically update IRS records. If a mistake affects tax returns, payroll, or bank records, coordinate the correction across those systems.
When does a business need a new EIN?
A new business name or address generally does not require a new EIN. Neither does every ownership change. The answer depends on the entity type, transaction, and federal tax treatment.
For example, a sole proprietor who incorporates generally needs a new EIN for the corporation. An existing LLC that elects corporate taxation generally does not need a new EIN solely because of that election. Changes involving LLC membership, mergers, or movement between partnership and disregarded-entity status deserve a specific review before applying.
An EIN remains assigned to the business; the IRS does not reassign it to another taxpayer. If the business closes, resolve required filings and tax obligations before asking the IRS to close its business account.
Keep your California registrations separate
California businesses may have several identification numbers. Your federal EIN is different from your Secretary of State entity number and any California Employment Development Department employer account number.
Receiving an EIN does not satisfy California requirements for Statements of Information, business licenses, seller’s permits, payroll registration, or Franchise Tax Board filings. California LLCs generally owe an annual $800 tax, subject to applicable exceptions, and may owe an additional LLC fee based on California total income.
Keep a central record of each agency, account number, filing deadline, and authorized contact. This makes discrepancies easier to identify before a bank application, tax filing, or business transaction.
Talk to a California business attorney
Itkin Law offers a free consultation for founders and business owners with questions about LLC formation or changes that may affect their business records. Schedule a free consultation or call (424) 603-8888.
This article is attorney advertising and provides general information only. It is not legal advice and does not create an attorney–client relationship. The law changes, and this article reflects the law as of its publication date. Every situation is different — contact us to discuss how the law applies to your exact circumstances. See our full disclaimer.
