DC Business Tax Identification Number

A DC Business Tax Identification number, sometimes called an Social Security Number or Federal Employer Identification Number (SSN/FEIN), is an identification number used to identify an individual and/or a business entity for tax purposes.


Learn the requirements for obtaining an FEIN by visiting the Internal Revenue Service (IRS) website or calling toll free 1-800-829-4933. For a SSN, you will need to complete Form SS-5, Application for a Social Security Card (PDF). You also must submit evidence of your identity, age, and U.S. citizenship or lawful alien status. For more information please see the Social Security web site.

A SSN/FEIN is required for all businesses/Individuals that meet the following criteria:

  • Businesses with employees
  • Businesses that withhold taxes
  • Businesses that operate as Corporations or Partnerships
  • Businesses that include the following (Trusts, Real Estate, Non-profits, Plan Administrators & Estates)

A SSN/FEIN is required before a BBL can be issued.

  • If application is submitted online, you will receive your EIN immediately.
  • If application is made by telephone (1-800-829-4933), you will receive your EIN immediately.
  • If application is faxed, you will receive your EIN within one week.
  • If application is mailed, you will receive your EIN in 4-5 weeks.
  • If application for SSN is mailed or submitted in person, you will receive your card within 1 week.

You may apply for an FEIN:

  • Online
  • via Fax
  • via Mail
  • via Telephone (Domestic: 1-800-829-4933/ International: 267-941-1099)

You may apply for a SSN:

  • Via Mail
  • Walk-in

Department of Consumer and Regulatory Affairs

1100 4th Street, SW, Washington, DC, 20024

Office Hours: Monday,Tuesday,Wednesday,Friday 8:30am to 4:30pm and Thursday 9:30am - 4:30pm

Phone: (202) 442-4400

This is map view of the location