USDOT Number: Who Needs One, How to Apply, and Staying Active

A USDOT number is a free identifier the Federal Motor Carrier Safety Administration assigns to companies that operate commercial vehicles, and federal and state agencies use it to track your safety record through inspections, audits, and crash investigations.¹ Getting one takes a few minutes online. The obligations that come with it — insurance filings, vehicle markings, biennial updates, and an 18-month safety monitoring period — are what catch new carriers off guard.

Who Needs a USDOT Number

You need a USDOT number if you operate a commercial vehicle in interstate commerce and any one of these applies:¹

The vehicle has a gross vehicle weight rating or gross combination weight rating of 10,001 pounds or more.²
It’s designed to carry 9 or more passengers, including the driver, for compensation.³
It’s designed to carry 16 or more passengers, including the driver, whether or not anyone pays a fare.³
It transports hazardous materials in amounts that require placarding.

The weight test trips people up more than any of the others. A pickup pulling a loaded trailer can easily cross 10,001 pounds combined, even when neither the truck nor the trailer looks like a commercial rig. If the combined rating on the door stickers crosses that line, you need the number.

The USDOT number is primarily an interstate requirement, but nearly 40 states and territories — including California, Texas, New York, Florida, Ohio, and Pennsylvania — also require it for purely intrastate operations.¹ Check with your state’s transportation agency before assuming you’re exempt.

Do You Also Need Operating Authority

New carriers often confuse the USDOT number with an MC number. They aren’t the same, and not every carrier needs both. The USDOT number is a safety tracking identifier. Operating authority (an MC, FF, or MX number) is permission to conduct a specific type of for-hire business in interstate commerce.⁴

You need operating authority on top of your USDOT number if someone pays you to haul cargo or transport passengers. The authority dictates what you can carry and what insurance you must maintain. Each type costs a one-time $300 filing fee, and if you need more than one, it’s $300 per authority.⁵

You don’t need operating authority if you’re a private carrier hauling your own goods, if you exclusively transport exempt commodities, or if you operate entirely within a federally designated commercial zone.⁴ Those carriers still need the USDOT number; they just skip the authority application and its fee.

How to Apply

Apply through FMCSA’s Unified Registration System at portal.fmcsa.dot.gov. Paper applications are generally no longer accepted for new registrations, so plan on doing this online. The USDOT number itself is free.¹

Create a portal account, choose the type of registration you need, and fill in your business and operational details. Once you submit a complete application, your USDOT number is assigned instantly, and a confirmation letter follows in the mail.⁶

What to Have Ready

Your legal business name, physical address, and EIN or Social Security number
Your type of operation: for-hire carrier, private carrier, or exempt for-hire carrier
Whether you’ll operate in interstate or intrastate commerce
The number of power units and trailers in your fleet
The types of cargo you’ll haul, such as general freight, household goods, or hazardous materials

If you’re also applying for operating authority in the same session, you’ll need proof of insurance and a BOC-3 process agent designation before that authority can be granted.

What Happens After Your Number Is Assigned

The 18-Month New Entrant Monitoring Period

Getting the number isn’t the end of FMCSA’s scrutiny. New carriers enter an 18-month safety monitoring period during which the agency closely watches roadside inspection results to confirm that basic safety controls are in place.⁷ Sometime after you’ve operated for at least three months, FMCSA conducts a safety audit. Expect to produce driver qualification files, vehicle maintenance records, hours-of-service logs, and drug and alcohol testing documentation. Failing the audit can cost you your registration.

Marking Your Vehicles

Every commercial motor vehicle subject to FMCSA regulations must display the carrier’s legal business name and USDOT number on both sides of the vehicle. The lettering must contrast sharply with the background and be readable from 50 feet in daylight.⁸ There’s no specified minimum letter height; the 50-foot legibility test is the standard.

The marking can be painted on or applied with something removable like a magnetic sign, as long as it meets the legibility and durability rules. If someone else’s name appears on the vehicle (a leased truck showing the lessor’s branding, for example), the operating carrier’s name and USDOT number must appear with the words “operated by” in front.⁸ This is one of the most common violations caught at the roadside, and it’s entirely avoidable.

Insurance and Process Agent Filings

FMCSA won’t grant operating authority until minimum insurance is on file. Coverage depends on what you haul:⁹

Property carriers (non-hazardous, 10,001+ lbs): $750,000 in liability coverage
Certain hazardous materials carriers: $1,000,000
Carriers of explosives, poison gas, or radioactive materials: $5,000,000
Passenger carriers (15 or fewer passengers): $1,500,000
Passenger carriers (16+ passengers): $5,000,000
Freight brokers and forwarders: $75,000 surety bond or trust fund

Your insurance company files proof of coverage electronically with FMCSA. Until that filing lands in FMCSA’s system, your operating authority stays pending and you can’t legally operate as a for-hire carrier.

You also need a BOC-3 filing, which designates a process agent in every state where you operate or where your vehicles travel. The agent is a person or company authorized to accept legal documents on your behalf, and the designation must be filed on Form BOC-3 and kept at your principal place of business.¹⁰ Several companies offer nationwide BOC-3 service for a one-time fee, usually well under $100.

Unified Carrier Registration

On top of USDOT registration, interstate carriers, brokers, freight forwarders, and leasing companies pay an annual UCR fee based on fleet size. For 2026:¹¹

0–2 vehicles: $46
3–5 vehicles: $138
6–20 vehicles: $276
21–100 vehicles: $963
101–1,000 vehicles: $4,592
1,001+ vehicles: $44,836

Brokers and leasing companies pay the base $46 rate regardless of fleet size. Carriers who skip UCR get flagged during roadside inspections and are placed out of service at a much higher rate than compliant carriers.¹² Individual states also set their own noncompliance penalties.

Drug and Alcohol Clearinghouse

If you employ CDL drivers, you must register with the FMCSA Drug and Alcohol Clearinghouse before you can run pre-employment queries or report violations. Owner-operators who drive their own truck also need Clearinghouse access, but must designate a consortium or third-party administrator to handle queries and reporting on their behalf.¹³ Clearinghouse registration is separate from the USDOT application, but you’ll need your USDOT number to complete it, so handle it shortly after your number is assigned. Running a pre-employment query on every CDL driver before their first trip is mandatory.

Keeping Your USDOT Number Active

Every carrier must file a biennial update, even if nothing has changed, even if you’ve stopped operating, and even if the company no longer exists.¹⁴ You must also update your information within 30 days of any change to your address, phone number, fleet size, or type of operation.¹⁵

Figuring Out Your Deadline

The last two digits of your USDOT number set your filing schedule. The next-to-last digit tells you whether you file in odd or even calendar years. The last digit tells you the month: 1 for January, 2 for February, on through 0 for October.¹⁴ If your number ends in 34, the next-to-last digit (3) is odd, so you file in odd-numbered years, and the last digit (4) puts your deadline on the last day of April. Your next update would be due April 30, 2027.

If You Miss It

FMCSA deactivates your USDOT number, which means you’re no longer authorized to operate. You also face civil penalties of up to $1,000 per day, capped at $10,000.¹⁴ Reactivating a deactivated number means filing the appropriate MCS-150 form through FMCSA’s website. Use only the forms available directly from FMCSA; expired versions from third-party sites won’t be accepted.¹⁶

How the Number Follows You

Your USDOT number is the key FMCSA uses to build your safety profile. The agency’s Safety Measurement System scores every carrier across seven categories covering unsafe driving, crashes, hours-of-service, vehicle maintenance, controlled substances and alcohol, hazmat, and driver fitness.¹⁷ Every roadside inspection, violation, and crash tied to your number feeds those scores. Poor scores trigger warning letters, more frequent inspections, and eventually intervention investigations. Shippers and brokers check the same scores before hiring, so a bad record costs you loads on top of any regulatory trouble.

1
U.S. Department of Transportation. Do I Need a USDOT Number?
2
Federal Motor Carrier Safety Administration. A Company Has a Truck With a GVWR Under 10,001 Pounds Towing a Trailer With a GVWR Under 10,001 Pounds
3
Federal Motor Carrier Safety Administration. Passenger Carrier Guidance Fact Sheet
4
FMCSA. What Is Operating Authority (MC Number) and Who Needs It?
5
FMCSA. What Is the Cost for Obtaining Operating Authority (MC/FF/MX Number)?
6
Federal Motor Carrier Safety Administration. How Long Does the Operating Authority or USDOT Number Application Processing Take if You File on the Internet or by Mail?
7
eCFR. 49 CFR 385.307 – New Entrant Safety Monitoring Procedures
8
eCFR. 49 CFR 390.21 – Marking of Self-Propelled CMVs and Intermodal Equipment
9
Federal Motor Carrier Safety Administration. Insurance Filing Requirements
10
eCFR. 49 CFR Part 366 – Designation of Process Agent
11
Unified Carrier Registration (UCR). Fee Brackets
12
UCR-Plan. Enforcement
13
FMCSA Clearinghouse. Registration: Employers With Portal Accounts
14
Federal Motor Carrier Safety Administration. Updating Your Registration or Authority – Section: Biennial Updates
15
Federal Motor Carrier Safety Administration. When Am I Required to File a Biennial Update?
16
FMCSA. How Do I Reactivate My USDOT Number?
17
Federal Motor Carrier Safety Administration. Safety Measurement System (SMS) Methodology