EIN Guide for a North Carolina LLC — What It Is and How to Get One

An Employer Identification Number (EIN) is a nine-digit number the IRS assigns to a business, formatted as XX-XXXXXXX. It's sometimes called a Federal Tax Identification Number. Think of it as a Social Security number for your LLC — the identifier the federal government, banks, and other institutions use to recognize the business.

What you use an EIN for

• Opening a business bank account: Nearly every bank requires an EIN to open an account in the LLC's name.
• Filing federal taxes: Multi-member LLCs and those with corporate elections file returns under the EIN.
• Hiring employees: You need an EIN to report payroll taxes and issue W-2s.
• Building business credit: An EIN lets the LLC establish its own credit profile, separate from your personal credit.
• Working with vendors and clients: Many will ask for your EIN on a W-9 instead of your Social Security number.

Why it's separate from state registration

The EIN is a federal matter, issued by the IRS — it has nothing to do with your Articles of Organization filing at the North Carolina Secretary of State. Forming the LLC with the state and getting an EIN from the IRS are two separate steps, done with two different agencies. You typically form the LLC first, then get the EIN once the entity legally exists.

Whether an EIN is strictly required depends on your LLC's structure, but in practice almost every LLC ends up needing one.

When an EIN is required

• Multi-member LLCs: Any LLC with two or more members must have an EIN, because it files a partnership return with the IRS.
• LLCs with employees: If you hire anyone, you need an EIN to handle payroll tax reporting.
• LLCs electing corporate taxation: If you elect S-corp or C-corp treatment, the entity files under its own EIN.
• LLCs with certain excise or federal tax obligations: Some specialized tax situations require one.

When it's technically optional but still smart

A single-member LLC with no employees can technically use the owner's Social Security number for federal tax purposes, since the IRS treats it as a disregarded entity. But getting an EIN anyway is the better move:

• It keeps your Social Security number off business paperwork, W-9s, and vendor files
• Most banks require an EIN to open a business account even for single-member LLCs
• It reinforces the separation between you and the business that supports liability protection

For nearly every real, operating North Carolina LLC, getting an EIN is the right call.

The IRS issues EINs directly and for free. Never pay a third party for the EIN itself; the number costs nothing.

The online application (fastest)

The quickest way is the IRS EIN Assistant at IRS.gov. A few things to know:

• The application is available during posted IRS hours (generally weekday business hours, Eastern time), not around the clock.
• You must complete it in one sitting — the session times out after a period of inactivity, and it doesn't save progress.
• You need a valid U.S. Social Security number or ITIN for the responsible party to file online.
• Once you finish, the EIN is issued immediately. You can download and print the confirmation (CP 575 / EIN confirmation letter) and use the number the same day.

What you'll need on hand

• The LLC's exact legal name as filed with the North Carolina Secretary of State
• The LLC's principal business address
• The name and SSN/ITIN of the responsible party (usually a member)
• The number of members and the LLC's tax classification
• The reason you're applying (started a new business, hiring employees, banking, etc.)

Timing tip

Apply for the EIN after your Articles of Organization are filed and the LLC exists, so the name and details you enter match the state record. Applying before the LLC is formed can create mismatches you'll have to untangle later.

Not having an SSN or ITIN doesn't disqualify you from getting an EIN — it just changes how you apply.

Non-U.S. responsible parties

If the responsible party doesn't have an SSN or ITIN, you can't use the online tool. Instead, you complete IRS Form SS-4 and submit it by fax or mail. On the responsible-party line where an SSN or ITIN would go, foreign applicants generally enter "Foreign" per the IRS instructions.

Fax vs. mail

Faxing Form SS-4 is faster than mailing — the IRS typically returns an EIN by fax within a few business days when you provide a return fax number. Mailing takes considerably longer, often several weeks. If you're a non-U.S. applicant and timing matters, fax is the better route.

Phone option for international applicants

International applicants can also obtain an EIN by calling the IRS's dedicated international line during its hours. Have a completed Form SS-4 in front of you so you can answer the agent's questions and record the EIN they assign.

Getting the number is the start of using it, not the end of the paperwork.

Store the confirmation safely

Save your EIN confirmation letter somewhere you can find it. Banks, lenders, and some agencies ask for it, and getting a replacement (Form 147C) later requires calling the IRS. A saved PDF of the original confirmation avoids that hassle.

Use it consistently

Put the EIN on your business bank account, your tax filings, W-9s you provide to clients, and any payroll setup. Consistency reinforces the LLC as a distinct entity and keeps your personal Social Security number out of business channels.

Common mistakes to avoid

• Paying for an EIN: It's free from the IRS. Any fee you pay is for a service handling the form, not for the number.
• Applying before the LLC exists: File your Articles first so the details match.
• Getting multiple EINs: An LLC needs only one. Don't reapply if you misplace it — request a 147C letter instead.
• Ignoring a tax-classification change: If you later elect S-corp or C-corp treatment, that's a separate IRS election; it doesn't require a new EIN, but it does require filing the election.

Mainstay Filing focuses on your North Carolina state formation, and we can point you to the correct IRS resources so you apply directly and for free. Because the EIN is a federal matter, you'll interact with the IRS for the number itself — but we make sure your state formation is solid first, so the details you give the IRS line up with your filed Articles.