What Is USDOT Number in Trucking?
Also called: DOT Number, US DOT Number, USDOT #
A USDOT number is a unique ID that FMCSA gives to a company that operates commercial vehicles. It tracks the company's safety record from inspections, crashes and audits. You need one if you run a vehicle of 10,001 pounds or more across state lines, among other cases. It is free, it cannot be transferred, and it is not the same as an MC number.
Last reviewed September 23, 2026 · Facts checked October 16, 2026
Key Points
- A USDOT number identifies a company in FMCSA's records. FMCSA uses it to collect safety information from audits, compliance reviews, crash investigations and inspections
- You need one for a vehicle with a gross vehicle or combination weight rating, or actual weight, of 10,001 pounds or more, whichever is greater, in interstate commerce
- You also need one for a vehicle that carries more than 8 passengers for pay, or more than 15 passengers not for pay, and for intrastate hazmat that needs a safety permit
- Many states also require a USDOT number for vehicles that run only inside the state. FMCSA keeps the list
- There is no charge to get a USDOT number (FMCSA)
- USDOT numbers are not transferable. MC numbers, which are operating authority, are transferable (FMCSA)
- A USDOT number is not an MC number. A for-hire interstate carrier usually needs both
What is a USDOT number?
A USDOT number is the ID that FMCSA gives to a company that operates commercial vehicles. It is a unique identifier, and FMCSA uses it to collect and watch the company's safety information. That information comes from audits, compliance reviews, crash investigations and roadside inspections. It is also the number that goes on the side of your truck, and the one a broker, shipper or insurer uses to look up your record.
Who needs a USDOT number?
FMCSA says companies that operate commercial vehicles carrying passengers or cargo in interstate commerce must register and have a USDOT number. A vehicle counts if its gross vehicle or combination weight rating, or its actual weight, is 10,001 pounds or more, whichever is greater. It also counts if it carries more than 8 passengers for pay, or more than 15 passengers not for pay. Intrastate carriers of hazmat that need a safety permit must register too. Interstate commerce includes a trip between two places in one state that passes through another state.
Is a USDOT number the same as an MC number?
No. The USDOT number identifies your company and tracks its safety record. The MC number is a docket number for operating authority, the permission to haul regulated freight for hire across state lines. Many carriers need both. A USDOT number alone does not let you haul for hire. Our MC number and operating authority pages explain the authority side.
How much does a USDOT number cost, and how do you get one?
FMCSA says there is no charge to get a USDOT number. You apply through FMCSA's registration system, which is now called Motus. If you also need operating authority, the application fee for each type of authority is $300. Make sure you apply on FMCSA's own site. Companies that charge you to file for a USDOT number are not FMCSA.
Can a USDOT number be transferred?
No. FMCSA says USDOT numbers are not transferable. A change of ownership, a change of legal name or a change in the form of business can mean you need a new number. FMCSA describes one exception: a sole proprietor that changes its business form but keeps operating in virtually the same way may keep its number. Operating authority, the MC number, can be transferred. For a specific ownership change, ask FMCSA before you rely on either answer.
Does a USDOT number expire?
The number does not expire, but you must update your registration every 24 months. The last digit of the number sets the month, and the next-to-last digit sets odd or even years. FMCSA has temporarily paused enforcement of the update and the inactivation of numbers while it moves to Motus, so check FMCSA's page for the latest. Your number must also be shown on both sides of your truck, readable from 50 feet in daylight.
Related Free Tools
Authority Age and History Checker
Enter an MC or USDOT number to see how long the authority has been active, every revocation and reinstatement, and every insurance filing.
New Authority Checklist
A step-by-step guide to getting your MC number and starting your trucking operation.
CDL & Compliance Deadline Tracker
Track all compliance deadlines in one place with color-coded alerts.
Carrier & Broker Lookup
Verify MC/DOT authority, check credit scores, and spot red flags before hauling.
Frequently Asked Questions
Are DOT numbers required?+
Yes, for companies that run commercial vehicles in interstate commerce with a weight rating or weight of 10,001 pounds or more, and for some other cases. Many states also require one for vehicles that stay inside the state.
Are DOT numbers state or federal?+
The USDOT number is federal and comes from FMCSA. Some states also require a USDOT number for intrastate vehicles, and some have their own numbers. FMCSA lists the states that require one. Check with your state agency.
How much does a USDOT number cost?+
FMCSA says there is no charge to get a USDOT number. Operating authority is separate and costs $300 for each type of authority. Be careful with companies that charge to file for you.
Are USDOT numbers transferable?+
No. FMCSA says USDOT numbers are not transferable. A change of ownership or legal name may require a new number. MC numbers, which are operating authority, can be transferred.
Do USDOT numbers expire?+
The number does not expire, but you must update your registration every 24 months. FMCSA has temporarily paused enforcement of the update while it moves to Motus, so check its registration page.
How big do USDOT numbers need to be on a truck?+
The rule gives no size. The letters and numbers must contrast sharply with the background and be readable from 50 feet in daylight while the truck is stopped, on both sides of the vehicle.
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This is industry terminology and typical practice. It is not legal or tax advice. Rates, fees, and rules mentioned are general ranges. Confirm the details on your rate confirmation, carrier agreement, or a current official source.