IRS EIN Filing Service & Guide (2026): Federal Tax ID Assistance

An Employer Identification Number (EIN) is a permanent 9-digit federal tax identification number issued by the Internal Revenue Service pursuant to 26 CFR 301.6109-1 for tax compliance and commercial banking.

Every multi-member LLC, entity hiring W-2 employees, or company establishing dedicated commercial business checking accounts must obtain an EIN from the IRS. While domestic applicants with a Social Security Number can apply online directly, international non-resident founders and complex trusts require specialized IRS Form SS-4 processing via international fax to the IRS Ogden Special Operations Unit.