How to Get a DOT Number for a Truck: Application, Authority, and Filings

To get a DOT number for a truck, you register your business through the Federal Motor Carrier Safety Administration’s online system, verify your identity, and submit a Motor Carrier Identification Report (Form MCS-150) with your company and fleet details. The USDOT number itself is free, and most people finish the application in under an hour. Depending on what you haul and whether you cross state lines, you may also need operating authority, insurance filings, and a process agent designation before your truck can legally move freight.

Do You Actually Need a USDOT Number

Federal rules require a USDOT number for any commercial motor vehicle used in interstate commerce that meets one of these thresholds:

  • A gross vehicle weight rating, gross combination weight rating, or actual weight of 10,001 pounds or more.
  • Carries more than 8 people, including the driver, for compensation.
  • Carries more than 15 people, including the driver, without compensation.
  • Transports hazardous materials in quantities that require placarding, at any weight.

The weight test uses whichever is greater: the manufacturer’s rating or the actual weight on the scale.1eCFR. 49 CFR 390.5

Interstate isn’t the only trigger. Roughly 39 states and Puerto Rico require intrastate commercial carriers to register for a USDOT number as well. Check FMCSA’s state-by-state list to see whether yours is on it.2Federal Motor Carrier Safety Administration. Do I Need a USDOT Number

Information to Gather Before You Apply

The online application pulls from information you should have in front of you before you start. Missing pieces will stall you.

  • Legal business name, any DBA names, Employer Identification Number, and physical and mailing addresses.
  • Operation type: for-hire, private, or exempt for-hire.
  • Cargo classification, such as general freight, household goods, or hazardous materials.
  • Number and type of commercial vehicles you’ll operate.
  • Whether you’ll run interstate, intrastate, or both.
  • A working phone number and email address.

Everything you enter feeds Form MCS-150, which becomes your registration record with FMCSA.3Federal Motor Carrier Safety Administration. Form MCS-150 and Instructions – Motor Carrier Identification Report

Applying Online

New applicants register through FMCSA’s online system. There is no fee for the USDOT number.

Identity Verification First

FMCSA requires all new registrants to pass an identity proofing check before receiving a USDOT number. The agency uses IDEMIA to handle document capture and verification. Have a government ID ready and expect to complete this step before the rest of the application moves forward.4Federal Motor Carrier Safety Administration. Identity Verification

Submitting the Application

Create your account, enter the business and fleet information you gathered, and submit. The system issues your USDOT number in the confirmation. If you also applied for operating authority, your MC number is assigned but not yet active; insurance and process agent filings still need to clear.

Operating Authority Is a Separate Step

A USDOT number identifies your company for safety tracking. Operating authority, often called an MC number, is the separate permission to haul loads for hire in interstate commerce. Having one does not give you the other.

You need operating authority if you transport passengers for compensation across state lines, or if you haul federally regulated commodities belonging to other people for pay. Private carriers moving only their own goods, and carriers hauling exclusively exempt commodities, do not need an MC number.5Federal Motor Carrier Safety Administration. Get Operating Authority (Docket Number)

Each type of operating authority carries a flat, non-refundable $300 filing fee. Applying for two different authority types, such as property and passenger, costs $300 each. Two authorities of the same type, like common and contract carrier for property, share a single $300 fee.6Federal Motor Carrier Safety Administration. What is the Cost for Obtaining Operating Authority (MC/FF/MX Number)?

Insurance and Process Agent Filings

FMCSA won’t activate your authority until you prove you can cover the damage your trucks might cause. Minimum liability coverage depends on cargo:

  • General non-hazardous freight, for-hire carriers with vehicles rated at 10,001 pounds or more: $750,000.
  • Oil and most hazardous materials: $1,000,000.
  • The most dangerous hazmat categories, including bulk explosives, certain poisonous gases, and highway-route-controlled radioactive materials: $5,000,000.

Passenger carriers have their own minimums: $5,000,000 for vehicles seating 16 or more including the driver, and $1,500,000 for vehicles seating 15 or fewer.7eCFR. 49 CFR Part 387 – Minimum Levels of Financial Responsibility for Motor Carriers

Your insurance company files proof of coverage directly with FMCSA. For most motor carriers, the policy carries an MCS-90 endorsement, which attaches to your liability policy and covers all vehicles operated under it. It is not a per-vehicle purchase.8Federal Motor Carrier Safety Administration. Form MCS-90 – Endorsement for Motor Carrier Policies of Insurance for Public Liability

You also need a BOC-3 filing, which designates a process agent in every state where you operate or travel through. A process agent is someone authorized to accept legal papers on your behalf. Most carriers hire a blanket service that covers all states at once. Only a process agent can file this form for a carrier, and a P.O. box does not qualify as an agent’s address.9Federal Motor Carrier Safety Administration. Form BOC-3 – Designation of Agents for Service of Process

Displaying the Number on Your Truck

Once FMCSA issues your number, it has to go on the truck. Federal rules are specific:

  • The USDOT number and your legal business name, or a single trade name, must appear on both sides of every self-propelled commercial vehicle.
  • The lettering must contrast sharply with the vehicle’s background color.
  • It must be readable from 50 feet away in daylight while the vehicle is stationary.
  • Markings must be maintained so they stay legible.

Painted lettering, magnetic signs, and vinyl decals all work as long as they meet the size and contrast requirements.10eCFR. 49 CFR 390.21

The 18-Month New Entrant Period

Every new motor carrier enters an 18-month monitoring window. During that period, FMCSA tracks your inspection results, crash reports, and compliance data.11Federal Motor Carrier Safety Administration. New Entrant Safety Assurance Program

Sometime within the first 12 months, generally after you’ve been operating for at least three months and have records to evaluate, FMCSA or a state-certified auditor conducts a safety audit. The audit reviews driver qualification files, hours-of-service records, vehicle maintenance documentation, the accident register, and drug and alcohol testing compliance.12eCFR. 49 CFR Part 385 Subpart D – New Entrant Safety Assurance Program

Pass, and FMCSA sends written confirmation within 45 days. Fail, and you receive a corrective action notice. Most carriers get 60 days to fix the problems; carriers hauling passengers or hazmat get 45. Miss the correction window and FMCSA revokes your registration.12eCFR. 49 CFR Part 385 Subpart D – New Entrant Safety Assurance Program

Set up your recordkeeping systems from day one. Building a paper trail after you learn about an upcoming audit rarely ends well.

Keeping the Number Active

Your registration is not a one-time filing. Every two years, you must update Form MCS-150 to confirm or correct your company information. FMCSA assigns your filing month and year based on your USDOT number:

  • The last digit of your USDOT number sets the month (1 = January, 2 = February, on through 0 = October).
  • If the next-to-last digit is odd, you file in odd years; even, in even years.

You also have to update your registration within 30 days of any change to your address, phone, email, or fleet size. An update filed within 12 months of the next biennial due date counts as that biennial filing.13Federal Motor Carrier Safety Administration. When Am I Required to File a Biennial Update?

Miss the update and FMCSA deactivates your USDOT number. Civil penalties can reach $1,000 per day, up to $10,000. Updating is free and takes minutes online.14Federal Motor Carrier Safety Administration. How Do You Complete a Biennial Update?

Most interstate carriers must also register and pay an annual fee through the Unified Carrier Registration program, which funds state motor carrier safety efforts. The fee scales with the number of power units you operate. For 2026, an owner-operator with one or two trucks pays $46; three to five vehicles pays $138; six to twenty pays $276. Fees run higher for larger fleets and are unchanged from 2025.15Unified Carrier Registration. Fee Brackets