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How do you complete the biennial update?

Biennial updates can be completed online, by mail, by phone, or by fax.

  • Online: If your USDOT Number is active, you may update your registration online.
  • Go to the “Register or Update Now without Help” section and click on “Online Registration without Help”
  • By mail: Once you have completed the MCS-150 form you must print the completed form and mail it to the address indicated on the form
  • By phone: You can call 800-832-5660 to have a form mailed to you. Once you have completed the form, you can mail it to the address indicated on the form
  • By fax: you can fax your completed form to 703-280-4003

Biennial updates are processed immediately if done online, but updates filed by fax or mail may take three to four weeks to process.

Last Updated : May 15, 2014