Employer Identification Number (EIN)

Employer Identification Number (EIN) paystub meaning: Your employer's nine-digit federal tax ID, written XX-XXXXXXX. It identifies the company, not you, and...

Your employer's nine-digit federal tax ID, written XX-XXXXXXX. It identifies the company, not you, and must match Box b of your W-2.

An Employer Identification Number is the IRS's account number for a business. It is nine digits with a hyphen after the first two: the IRS's own Form W-2 instructions give the format as XX-XXXXXXX. On your stub it sits in the employer block at the top, beside the company name and address. It has nothing to do with you personally, and it is not the Employee ID or file number that identifies you inside the payroll system — those two are often printed inches apart. The number matters once a year. At tax time it must match Box b of your W-2 exactly, because that is how the IRS and the Social Security Administration attach your wages to the right employer. The W-2 instructions are blunt that an employer's EIN may not be truncated on any form, which is why all nine digits are visible even though your own Social Security number may be masked on your employee copies. The first two digits do not encode a state. The IRS says the prefix shows which IRS campus assigned the number, or that it was issued through the online application. Reading a location into it is a mistake. One EIN covers an entire entity. A company with 40 locations and several trade names may run all of them under a single EIN, which is why the name on your W-2 can be a holding company you have never heard of. Changing a business name or location does not require a new EIN. Incorporating, forming a partnership, or obtaining a new corporate charter does. An EIN is free from the IRS, and an applicant may obtain only one per day.

Payroll and labor-law terms can vary by jurisdiction and by the facts of a particular job. This definition is an orientation, not legal advice; current federal, state, local, union, and employer rules may all matter.

When this term appears on a statement, read its label, current amount, year-to-date amount, pay-period context, and any adjacent rate or hours together. Resolve a mismatch with the original issuer or the cited authority rather than changing a record to force a preferred result.