Do I Need a USDOT Number? Who Needs One and When

A USDOT number is the identifier the Federal Motor Carrier Safety Administration (FMCSA) gives a motor carrier. Plenty of people who buy a pickup and a trailer, start hauling for a business or take over a small fleet are not sure whether they need one. The federal answer comes down to two questions: what the vehicle is, and where the load goes.

This guide walks through that test using the federal rules themselves: the definitions in 49 CFR 390.5T, the registration rule in 49 CFR 390.19T and FMCSA’s own page Do I Need a USDOT Number? State rules for trucks that never leave the state are a separate question, covered briefly near the end.

The short answer

FMCSA puts it this way: “Companies that operate commercial vehicles transporting passengers or hauling cargo in interstate commerce must be registered with the FMCSA and must have a USDOT Number.” It adds that intrastate hazardous materials carriers “who haul types and quantities requiring a safety permit must register for a USDOT Number.”

So under federal rules you need a USDOT number when both of these are true:

1. The vehicle is a commercial motor vehicle (CMV) as the regulations define it.
2. It is used in interstate commerce.

The one federal exception to the interstate part is hazmat that requires a safety permit, which needs a USDOT number even when it stays inside one state. Each piece is explained below.

Step 1: Is your vehicle a commercial motor vehicle?

Under 390.5T, a vehicle used on a highway in interstate commerce to carry passengers or property is a CMV if it meets any one of these four conditions:

• Weight. It has “a gross vehicle weight rating or gross combination weight rating, or gross vehicle weight or gross combination weight, of 4,536 kg (10,001 pounds) or more, whichever is greater.”
• Paid passengers. It is designed or used to carry “more than 8 passengers (including the driver) for compensation.”
• Unpaid passengers. It is designed or used to carry “more than 15 passengers, including the driver,” and is not used to carry passengers for compensation.
• Placarded hazmat. It carries hazardous materials “in a quantity requiring placarding.”

Two details about the weight test catch people out. First, the rule takes whichever number is greater, the rating or the actual weight, so a truck rated under 10,001 pounds can still qualify if it actually runs heavier, and a light truck pulling a trailer can cross the line through its combination rating. Second, a rating counts even when the truck is empty. A pickup towing a gooseneck or flatbed trailer is worth checking: neither piece may look like a commercial truck on its own, but together they can reach 10,001 pounds.

Check the GVWR on the door label of the truck and on the trailer’s VIN plate before deciding you are under the line.

Step 2: Are you in interstate commerce?

Interstate commerce is wider than simply crossing a state line. The regulation defines it as trade, traffic or transportation in the United States in any of three situations:

1. “Between a place in a State and a place outside of such State (including a place outside of the United States).”
2. “Between two places in a State through another State or a place outside of the United States.”
3. “Between two places in a State as part of trade, traffic, or transportation originating or terminating outside the State or the United States.”

The third one is the one people miss. A truck can pick up at a port or rail yard and deliver to a warehouse a few miles away in the same state, and that move can still be interstate commerce if the freight started its trip in another state or another country and your leg is part of that trip. Where the cargo is coming from and going to matters, not only where your truck drives.

Anything that does not fit those three situations is intrastate commerce. If you are not sure which side of the line a regular run falls on, FMCSA’s USDOT number wizard asks about your operation and tells you whether you need a number.

Hazmat that needs a safety permit, even inside one state

Placarded hazmat on its own makes a vehicle a CMV, which brings you back to the interstate test. A narrower group of shipments goes further. Under 49 CFR 385.403, a carrier needs a federal hazmat safety permit to haul certain materials in “interstate or intrastate commerce.” The list includes:

• highway route controlled quantities of Class 7 radioactive material;
• more than 25 kg (55 pounds) of Division 1.1, 1.2 or 1.3 explosives;
• certain materials poisonous by inhalation, depending on hazard zone and packaging;
• bulk shipments of methane or natural gas in packaging of 3,500 gallons or more.

A carrier in that group that runs only inside its state still registers with FMCSA. Section 390.19T says such a carrier “must file the Combined Motor Carrier Identification Report and HM Permit Application, Form MCS-150B.”

When the federal rule does not apply

Section 390.3T(f) lists operations the federal motor carrier safety rules do not cover, unless a rule says otherwise. The ones most people ask about:

• Personal moves. “The occasional transportation of personal property by individuals not for compensation nor in the furtherance of a commercial enterprise.” Moving your own household goods in a rented truck is one example. Hauling for your business is not covered by this exception, even if nobody pays you for the trip.
• Government vehicles. Transportation performed by the federal government, a state or a political subdivision of a state.
• School buses. School bus operations, with a few listed exceptions.
• Emergency vehicles. Fire trucks and rescue vehicles “while involved in emergency and related operations,” and the transportation of human corpses or sick and injured persons.

One exception has a catch. Vehicles designed or used to carry between 9 and 15 passengers, including the driver, not for direct compensation are excepted from most of the rules, but the same paragraph says their carriers must still comply with 390.19T, the registration rule. In practice they still need a USDOT number.

Hauling your own goods still counts

The registration rule applies to every motor carrier, and the regulations define a motor carrier as “a for-hire motor carrier or a private motor carrier.” A private carrier is a business that moves its own property in its own commercial vehicles. A landscaping company, a contractor hauling its own materials or a retailer making its own deliveries across a state line needs a USDOT number on the same terms as a carrier hauling freight for customers.

What changes with for hire work is operating authority, the MC number. A private carrier usually needs the USDOT number only, while a for hire interstate carrier of regulated freight usually needs both. The difference is laid out in USDOT number vs MC number.

When you have to have it

Under 390.19T, a carrier files the registration form before it “begins operations.” The USDOT number is issued once FMCSA processes that form. In other words, the number comes first and the first interstate load comes after, not the other way around.

If you buy a truck now but will only run local, intrastate loads for a while, the federal requirement starts when your operation first meets the test above. Check your state’s rules for the period before that, because many states have their own requirement (see below). For the application itself, how to apply for a USDOT number online covers the Motus registration step by step.

What comes with a USDOT number

Getting the number is not the end of it. Two federal obligations come with it.

Marking the truck. 390.19T says the carrier “must display the number on each self-propelled CMV,” following the marking rule in 390.21T. The marking shows the carrier’s legal name or a single trade name and the number with the letters USDOT in front. It must:

• appear on both sides of the vehicle;
• be in letters that “contrast sharply in color with the background”;
• be “readily legible, during daylight hours, from a distance of 50 feet (15.24 meters) while the CMV is stationary.”

It can be painted on or be a removable device, as long as it meets the same legibility rules.

Updating the registration. The MCS-150 has to be updated “every 24 months,” on a schedule set by the last two digits of your USDOT number. Missing the update can lead to penalties and “deactivation of its USDOT Number.” The schedule and what happens when you miss it are explained in the FMCSA biennial update guide.

States can require one for intrastate trucks

Staying inside one state does not settle the question. FMCSA notes that “some states require their intrastate commercial motor vehicle registrants to obtain a USDOT Number,” and lists them on its Do I Need a USDOT Number? page. California, Texas, Florida, Georgia, Pennsylvania, New York, Ohio and New Jersey are among the states on that list.

The federal tests above do not decide the state question. Who has to register for intrastate work is set by each state’s own rules. FMCSA’s advice for this part is direct: “For intrastate motor carrier registration, check with your responsible state agency.”

There is also a link between the two systems. Under 390.19T, a carrier that registers its vehicles in a state taking part in the Performance and Registration Information Systems Management (PRISM) program is exempt from the federal filing rule, “provided it files all the required information with the appropriate State office.”

A quick self check

1. Check the GVWR, the GCWR if you tow, and the actual weight. Is the greatest of them 10,001 pounds or more? Or does the vehicle carry more than 8 paid or more than 15 unpaid passengers, or placarded hazmat?
2. Does any load cross a state line, pass through another state or continue a trip that started or ends outside your state?
3. Do you haul hazmat on the 385.403 safety permit list, even only inside your state?
4. Does one of the 390.3T(f) exceptions really fit your operation?
5. Does your state require a USDOT number for intrastate carriers?

A yes to the first two questions, or to the third, means you need a USDOT number under federal rules. A yes to the fifth means your state may require one even if the federal rules do not. If the answers are unclear, run your operation through the FMCSA wizard before your first load.