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May 19, 2023

USDOT vs MC Number: Key Differences Explained

If you own and operate a commercial motor vehicle and if you want to take it across state lines for compensation and commercial activities, there will be a few rules and regulations that you will have to follow. The United States Department of Transportation requires you to get your commercial motor vehicle properly registered before you start operating it in any capacity. You must also obtain proper identification through the federal motor carrier safety administration before you start hauling goods or transporting people across state lines.

The two most basic requirements that you have to fulfill as per authorities are your USDOT number and MC number which is also called MC authority. A lot of people get confused between the two. It is very critical to understand their differences and how they let you function in the transport sector without any trouble or hiccups.

1. Let’s Understand What Your USDOT Number Is

Your Dot number is a number that the US Department of Transportation assigns to your company. When you register your vehicle with the federal motor carrier safety administration, you receive it as a part of the usual process. It is an identifier for your commercial vehicle and this makes obtaining your USDOT number even more important.

2. Now Let’s Come To Your MC Number

Operating authority is also referred to as an “MC,” “FF,” or “MX” number, depending on what authority type you require. You may need to obtain multiple authority types depending on what type of company operation you have. You must have operating authority if you will be operating as a for-hire carrier, transporting passengers or arranging for their transport in interstate commerce, or transporting federally regulated commodities or arranging for their transport in interstate commerce.

A major difference between a USDOT number and an MC number is you might be required to have a USDOT number even if you don’t cross state lines. Whereas you are only required to have a MC number if you do cross state lines.

3. Do I Need A Dot Number?

The federal motor carrier safety administration has laid down a few requirements as to what constitutes an entity that must obtain a dot number. Let’s have a look at these guidelines:

  • The gross vehicle weight rating or gross combination weight rating of your vehicle should be 10,000 LBS or more than that
  • If you want to drive commercial vehicles on interstate routes, you will need a dot number
  • Vehicles that transport 9 or more people for compensation will have to apply for a DOT number
  • Vehicles transporting 16 people or more without any compensation will have to apply for this number
  • If you transport hazardous material using a commercial vehicle, this again necessitates you to obtain a USDOT number

4. Do I Need An MC Authority / MC Number?

If you will be operating as a for hire carrier, transporting passengers or regulated commodities in interstate commerce you will need to apply for an MC number. This applies to those that will be arranging for the transport of passengers or regulated commodities in interstate commerce as well.

5. How To Apply For Your USDOT Number

Before you begin registering for your DOT number it is important that you make no mistakes while registering for it. For this reason, it is advised that you go through a third party dot compliance service provider for your compliance needs and obtain your USDOT number. However, you can also apply for your USDOT number by going to the FMCSA website if you choose.

6. How To Apply For Your MC Number/Operating Authority

You must first create a business entity to obtain your operating authority MC number. You must obtain your EIN, which is the employer identification number through the IRS. In the process, you will also have to get pre-approval for liability and cargo insurance. If you are unable to do that, your MC authority application will not get approved. Yes, if you are wondering, obtaining your MC authority is a lot more complicated than getting your Dot number.

  • To apply for your MC authority, you will have to refer to your business plan and determine your registration needs with the FMCSA.
  • Remember to note down your truck-related information such as the year of purchase, VIN, weight, combination weight, license plates, details of incorporation, and the like. 
  • You will also need your USDOT number to get your MC authority.
  • And yes, how can you forget filing your BOC-3 paperwork, applying for HVUT which is the heavy vehicle use tax, and obtaining your unified carrier registration permit as you proceed in the application process?
  • You must also set up your IFTA which is the International Fuel Tax Agreement account and enroll in the International Registration Plan without any delay.
  • As per the rules laid down by the FMCSA and the Department of Transportation, you will have to enroll in a drug and alcohol testing program as well.

7. Finding Your USDOT Number

Looking up your USDOT number is easy. Just go through the FMCSA website and follow the directions. Or you can choose to contact your third party administrator and they will do the needful in only a matter of a few seconds.

8. Finding Your MC Number

Finding your MC number or MC authority is also easy. You just have to go to the FMCSA website with your USDOT number or company name. But you will be able to find your MC number faster if you connect with your dot compliance facilitator instead.

Final Thoughts

Remember, dot compliance is not only about securing the most relevant permits or updating your licenses or performing regular checks and inspections on your vehicles, and maintaining a complete drug and alcohol use and abuse policy at your workplace. It is about the safety of your workers, employees, and the public in general. It is also about keeping your business ethical and lawful all the while making sure that nothing interrupts your business functions. Get in touch with your third party administrator to understand your compliance needs better.

FAQ

What Happens If You Fail a DOT Inspection?

If the vehicle or driver is deemed unsafe, they may be placed out of service, meaning the vehicle cannot operate until all violations are properly corrected.

Who decides which level of inspection to perform?

Both the Commercial Vehicle Safety Alliance (CVSA) and the Federal Motor Carrier Safety Administration have a part in DOT inspection levels. The CVSA develops the criteria and sets the procedures for every inspection level. The FMCSA establishes overall regulations and determines which vehicles must be inspected.

How often do DOT inspections happen?

DOT inspections can happen at any time. They most commonly happen during roadside stops and weigh stations. Carriers with higher risk, poor safety records, or hazardous material may be inspected more frequently.

What documents are required during an inspection?

Documents required during an inspection include but may not be limited to:

  • State driver’s license or commercial driver’s license
  • Medical examiner’s certificate
  • Record of duty status
  • Vehicle registrations
  • Periodic inspections document for all vehicles being operated
  • Shipping papers or bills of lading
  • Information for hazardous materials being transported
  • Proof of insurance

What are common DOT inspection violations?

According to the FMCSA, the 5 most cited roadside violations are:

  1. False Report of Driver’s Record of Duty Status: log falsification providing inaccurate or intentionally altered duty-status information.
  2. No Record of Duty Status (ELD Required): using a commercial vehicle without the required electronic logging device or valid time records.
  3. Inoperable Required Lamp: crucial lights (headlights, brake lights, turn signals, etc.) are not functioning properly.
  4. Operating a Commercial Motor Vehicle Without a Commercial Driver’s License (CDL)
  5. Operating a Commercial Motor Vehicle Without Proof of a Periodic Inspection: failure to meet FMCSA the maintenance standards of a required annual inspection.

Why is updating VMT important for compliance?

VMT is tracked to determine fuel tax obligations (Vehicle Miles Traveled Tax) used for road maintenance and improvements. Trucking companies must keep accurate records of VMT to ensure they pay the correct amount of taxes.

How often should VMT be updated?

For motor carriers VMT must be updated every two years along with the MCS-150 form for the Biennial Update.

Can VMT be tracked automatically with technology?

Yes, Electronic Legging Devices (ELDs), Fleet Management Apps, and Mileage Tracking Software are all technological advancements that can simplify the process of VMT tracking.

How does VMT affect taxes and fuel reporting?

Accurate VMT records help document mileage for business-related tax deductions, ensuring compliance with IRS regulations. It also supports fuel tax reporting by tracking the miles each vehicle travels in different jurisdictions, which is essential for state and federal fuel tax calculations. Proper tracking reduces errors, prevents penalties, and provides a clear record of operational costs.

How do I know when my Biennial Update is due?

  • Your filing schedule depends on the last two digits of your USDOT number. The last digit corresponds with what month the form needs to be filed in. January is 1, February is 2, March is 3, etc. The next to last digit determines the year (odd-numbered year or even numbered year). For example, DOT number 1234567 files their biennial update in July (7) of every even year (6). Contact us today to see if you’re due.

Does the Biennial Update cost money to file?

While you can file your Biennial Update yourself for no cost through FMCSA. The process can often be confusing and time-consuming. Our team can handle your filing for you, simplifying the process for you.

Do intrastate carriers need to file the update?

Yes, even if carriers stay within state lines, a biennial update is still needed for their USDOT number.

What happens if I miss my filing deadline?

  • Failure to complete biennial update to FMCSA can be subject to fines with a maximum penalty of $10,000. If your update is past due, you can still file it to restore your compliance status. Contact us today to file your form! https://dotcompliancegroup.com/bu-update/ 

What are the new FMCSA rules in 2025?

  1. Civil Penalty Amount Increases
  2. Drug & Alcohol Clearinghouse Becomes Exclusive Source for checking driver history.
  3. ELD Technology Required
  4. SMS (Safety Measurement System) Modernization
  5. Crash Preventability Determination Program Expanded

When do the 2025 FMCSA regulations take effect?

The confirmed dates these regulations take effect is May 30, June 23, October 1, 2025.

How can trucking companies prepare for these changes?

Regularly reviewing your Safety Measurement System (SMS) scores and maintaining personal checklists for inspections, driver qualification files, and drug and alcohol testing helps catch issues before they affect audits. Partnering with DOT Compliance Group streamlines filings, reporting, and ongoing monitoring, taking the guesswork out of FMCSA regulations and keeping your operation audit-ready year-round.

What Triggers a DOT Compliance Review?

A DOT compliance review is triggered when FMCSA wants to ensure a carrier is following safety regulations. Common triggers include high SMS safety scores, a history of crashes or violations, and previous noncompliance. Staying proactive with accurate records, driver files, and regular internal audits helps reduce the likelihood of a review.

Where can I get help with FMCSA filings?

DOT Compliance Group can assist with any help or questions you may have about FMCSA filings. Call 972-476-9962.

How long are violations kept on record?

According to the Clearinghouse rules, drug and alcohol violations remain in the FMCSA Clearinghouse for five years, provided all requirements (such as completing the return‑to‑duty process) have been met before that period ends.

What if an employer makes a mistake in reporting?

In practice, correcting an employer reporting error typically involves identifying the mistake in the database and then submitting a request for correction through the Clearinghouse portal or FMCSA procedures, so the record reflects accurate information. 

What are the penalties for non-compliance?

FMCSA rules allow civil penalties for non‑compliance, and separate authorities note that employers who fail to meet Clearinghouse requirements may face civil fines or criminal penalties under federal regulations.

Do trucking companies check the Clearinghouse?

Yes — trucking companies check the Clearinghouse as part of their hiring and compliance process. The FMCSA Clearinghouse is designed so employers can search a driver’s drug and alcohol violation records before permitting them to operate a commercial vehicle. Employers are required to conduct these queries for both prospective and current drivers as part of compliance.

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