Federal guide
USDOT number: who needs one and how to get it
A USDOT number is the identifier FMCSA uses to track a company's safety record across audits, inspections, and crash investigations. Most interstate carriers must have one before operating, and 39jurisdictions also require it for intrastate registrants. Getting one starts with Form MCS-150 in FMCSA's Unified Registration System.
By Evan Reid, Founder of Haul Handbook · Updated Jul 18, 2026
What a USDOT number is for
The USDOT number is the unique identifier FMCSA uses to collect and monitor a company's safety information from audits, compliance reviews, crash investigations, and inspections.That safety file follows your company: FMCSA's CSA program scores carriers on inspection and crash data tied to the USDOT number, and those scores shape roadside attention and audits.
Who needs a USDOT number
A USDOT number is required for a vehicle used in interstate commerce that has a GVWR, GCWR, gross vehicle weight, or gross combination weight of 10,001 pounds or more (whichever is greater), or is designed or used to transport more than 8 passengers including the driver for compensation, or more than 15 passengers including the driver not for compensation. It is also required for intrastate carriers hauling types and quantities of hazardous materials that require a safety permit (49 CFR 385.403).
What counts as interstate commerce is broader than crossing a state line yourself: Trade, traffic, or transportation between a place in a state and a place outside that state (including outside the United States), between two places in a state through another state or a place outside the United States, or between two places in a state as part of trade originating or terminating outside the state or the United States.
States that require a USDOT number for intrastate carriers
Staying inside one state does not always mean skipping the USDOT number. FMCSA lists 39 jurisdictions that require intrastate commercial motor vehicle registrants to obtain one:
Alabama, Alaska, Arizona, California, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Idaho, Indiana, Iowa, Kansas, Kentucky, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, Montana, Nebraska, Nevada, New Jersey, New York, North Carolina, Ohio, Oklahoma, Oregon, Pennsylvania, Puerto Rico, South Carolina, Texas, Utah, Washington, West Virginia, Wisconsin, Wyoming
State-issued carrier numbers are a separate layer on top; see state DOT number requirements and intrastate authority by state for how each state handles its own registrants.
What a USDOT number costs
Here is an honest gap in the record: FMCSA's registration pages do not publish an application fee for the USDOT number itself, so we do not quote one. Be wary of filing services that bundle their own charge and present it as the government fee. What FMCSA does state directly: fmcsa states directly that updating your information is free.
The biennial update: the deadline that deactivates numbers
All entities under FMCSA jurisdiction must update their information (MCS-150 series) every 24 months, even if nothing changed, the company ceased interstate operations, or the business closed without notifying FMCSA.
The schedule comes from the number itself. File by the last day of the month indicated by the last digit of the USDOT number (1 = January through 0 = October). If the next-to-last digit is odd, file in odd-numbered years; if even, in even-numbered years.
Miss it and the consequences are concrete: Failure to complete the biennial update results in deactivation of the USDOT number and may bring civil penalties of up to $1,000 per day, not to exceed $10,000. Filing mechanics and the calendar math are covered in our MCS-150 biennial update guide.
USDOT number vs operating authority
The USDOT number and operating authority are different registrations. The USDOT number is the safety identifier; the MC/FF docket is the for-hire authority. For-hire interstate carriers of regulated commodities need both. The side-by-side comparison lives in operating authority vs USDOT number, the docket half is explained in our MC number guide, and the whole registration sequence is in how to get your own authority.
Frequently asked questions
Is a USDOT number the same as an MC number?
- The USDOT number and operating authority are different registrations. The USDOT number is the safety identifier; the MC/FF docket is the for-hire authority. For-hire interstate carriers of regulated commodities need both.
How much does a USDOT number cost?
- FMCSA's registration pages do not publish an application fee for the USDOT number itself, so treat that cost as unconfirmed rather than trusting a number from a filing service. What FMCSA does state directly: updating your registration information later is free.
Do I need a USDOT number for intrastate trucking?
- It depends on the state. FMCSA lists 39 jurisdictions that require intrastate commercial motor vehicle registrants to obtain a USDOT number. The full list is on this page, and each state's own trigger rules live in its state guide.
What is the biennial update?
- All entities under FMCSA jurisdiction must update their information (MCS-150 series) every 24 months, even if nothing changed, the company ceased interstate operations, or the business closed without notifying FMCSA.
What happens if I skip the biennial update?
- Failure to complete the biennial update results in deactivation of the USDOT number and may bring civil penalties of up to $1,000 per day, not to exceed $10,000.
Sources
Primary statutes and official agency pages this guide relies on. Laws and fees change, so confirm against the current source before you act.
- Do I Need a USDOT Number? · Federal Motor Carrier Safety Administration (FMCSA), U.S. DOT
- Updating Your Registration or Authority · Federal Motor Carrier Safety Administration (FMCSA), U.S. DOT
- Get Operating Authority (Docket Number) · Federal Motor Carrier Safety Administration (FMCSA), U.S. DOT
- CSA, Compliance, Safety, Accountability · Federal Motor Carrier Safety Administration (FMCSA), U.S. DOT
Haul Handbook publishes educational information about trucking registration and compliance requirements. This is not legal, financial, or tax advice. Rules, fees, and deadlines change; confirm with the agency before you file or pay.