USDOT Number Requirements Explained

What Is a USDOT Number?

A USDOT number is a unique identifier assigned by the Federal Motor Carrier Safety Administration (FMCSA) to commercial motor vehicle operators engaged in interstate commerce. The number is used to track a carrier's safety information, including inspection results, crash history, compliance reviews, and safety ratings. It serves as the foundation of your carrier identity in the federal regulatory system and is required before you can obtain operating authority.

Who Needs a USDOT Number?

The following entities are required to obtain a USDOT number:

• Interstate for-hire carriers -- Companies that transport passengers or property across state lines for compensation
• Interstate private carriers -- Companies that transport their own goods across state lines in vehicles weighing over 10,001 pounds
• Hazardous materials transporters -- Any commercial vehicle transporting hazmat in quantities requiring placarding, regardless of whether operations are interstate or intrastate
• Freight brokers and freight forwarders -- Entities arranging transportation of goods
• Some intrastate carriers -- Many states require a USDOT number for intrastate commercial vehicles

Vehicle Weight and Size Thresholds

Generally, you need a USDOT number if you operate any of the following in interstate commerce:

• Vehicles with a gross vehicle weight rating (GVWR) or gross combination weight rating (GCWR) of 10,001 pounds or more
• Vehicles designed or used to transport more than 8 passengers (including the driver) for compensation
• Vehicles designed or used to transport more than 15 passengers (including the driver) without compensation
• Any vehicle transporting hazardous materials requiring placards

How to Apply for a USDOT Number

Applications are submitted through FMCSA's Unified Registration System (URS) online portal. The process is free and typically takes about 20 minutes. You will need:

• Legal business name and DBA (if applicable)
• Employer Identification Number (EIN) or Social Security Number
• Business address and contact information
• Type of operation (for-hire, private, exempt for-hire)
• Type of cargo transported
• Number of power units and drivers

Your USDOT number is typically assigned within one business day of completing the online application.

USDOT Number vs MC Number

The USDOT number and MC number serve different purposes:

• The USDOT number is a safety registration identifier -- it tracks your safety record and is required for all commercial vehicle operations meeting the thresholds above
• The MC number represents your operating authority -- it grants legal permission to operate as a for-hire carrier, broker, or freight forwarder in interstate commerce

Most for-hire interstate carriers need both. Private carriers hauling their own goods typically only need a USDOT number. Use TruckCodes carrier search to look up any carrier's USDOT and authority information.

Keeping Your USDOT Number Active

Your USDOT number must be kept current through biennial (every two years) MCS-150 updates. The filing schedule is based on the last digit of your USDOT number. Failing to update will result in deactivation of your USDOT number, which means you cannot legally operate. Additionally, your BOC-3 process agent designation and insurance filings must remain current. Track all compliance deadlines through our knowledge base and carrier startup checklist.