Back to Blog
Operating a trucking business in the United States involves navigating several regulatory requirements, and MC numbers are a key part of staying compliant. Whether you transport freight across state lines or operate as a for-hire carrier, understanding motor carrier authority is extremely essential. In this guide, we answer some of the frequently asked questions about MC numbers, providing a clear overview of what they are, why they matter, and how they can impact your trucking operations.
MC number: Your frequently asked questions answered
1. What is an MC number?
An MC number (Motor Carrier number) is a federal operating authority issued by the Federal Motor Carrier Safety Administration (FMCSA) that allows certain transportation businesses to haul regulated freight or passengers for hire across state lines. Unlike a USDOT number, which is used mainly for safety monitoring and compliance tracking, an MC number gives a carrier the legal authority to operate in interstate commerce as a for-hire transportation provider. This authority is issued to motor carriers, freight brokers, and freight forwarders, and it is commonly referred to as Motor Carrier Operating Authority.
What is an MC number – A complete guide on Operating Authority
2. Do I need an MC Number?
Yes, if you operate as a for-hire carrier transporting regulated goods or passengers in interstate commerce. The Federal Motor Carrier Safety Administration (FMCSA) requires an MC number for certain transportation businesses that provide transportation services for compensation across state lines.
You generally need an MC number if you are:
- A for-hire motor carrier: Transporting freight or passengers for compensation.
- An interstate carrier: Moving cargo across state lines or transporting freight that originates or ends in another state.
- Carriers of regulated commodities: Transporting goods such as household goods, vehicles, or hazardous materials.
- Freight brokers or freight forwarders: Arranging transportation services between shippers and carriers for a fee.
3. Am I exempt from an MC number?
Yes, some carriers are exempt from needing an MC number depending on the type of cargo they transport and how they operate.
Common exemptions include:
- Private carriers: Businesses transporting their own goods or company inventory rather than hauling freight for hire.
- Carriers hauling exempt commodities: Transporting certain agricultural products or other unregulated goods that do not require operating authority.
- Intrastate carriers: Businesses operating entirely within one state without crossing state lines.
Even if you are exempt from an MC number, you may still need a USDOT number depending on the size of your vehicle, the type of cargo you haul, and your state regulations.
4. Do I need an MC number for intrastate trucking?
No. An MC number is generally not required if you operate only within one state (intrastate trucking). The Federal Motor Carrier Safety Administration (FMCSA) requires MC authority mainly for interstate transportation, meaning freight or passengers moving across state lines.
However, you may still need other registrations, such as:
- A USDOT number, depending on your vehicle weight, cargo type, or state rules
- State operating authority, if your state requires permits for for-hire carriers
- Additional state permits or registrations for commercial trucking operations
Because requirements vary by state, you should check with your state’s transportation or motor carrier authority to confirm the permits needed for intrastate operations.
5. Do I need an MC number to run local loads?
No, you usually do not need an MC number if you run local loads within a single state (intrastate trucking). The Federal Motor Carrier Safety Administration (FMCSA) generally requires MC operating authority only for carriers transporting regulated freight or passengers across state lines for hire.
However, you may still need other registrations, including:
- A USDOT number, depending on your vehicle weight, cargo type, and state requirements
- State operating authority, if your state requires permits for for-hire carriers
- Additional state permits or registrations based on the type of freight you transport
If your operations cross state lines or involve interstate freight, you may still need an MC number even if some of your loads are local.
6. Is an MC number the same as a DOT number?
No, an MC number is different from a USDOT number. Both are issued by the FMCSA, but they serve different purposes. A USDOT number is mainly used to track a company’s safety records and compliance, while an MC number provides operating authority for carriers transporting regulated goods or passengers for hire across state lines.
DOT and MC numbers: Key differences
7. How to get an MC number?
You can get an MC number by applying for operating authority through the Federal Motor Carrier Safety Administration (FMCSA). The application is submitted online through the FMCSA registration system and requires several steps before the authority becomes active.
To get an MC number, you typically need to:
- Register for a USDOT number if you do not already have one
- Submit the operating authority application through the FMCSA online registration system
- Pay the required application fee
- File proof of insurance with the FMCSA
- Submit a BOC-3 form designating a process agent in each state
Your MC operating authority becomes active after the FMCSA reviews your application and confirms all required filings.
How to get an MC number: A step-by-step guide
8. How long does it take to get an MC number?
You usually receive an MC number within about 24 hours after submitting your application and obtaining a USDOT number. However, the operating authority does not become active immediately.
The Federal Motor Carrier Safety Administration (FMCSA) requires a mandatory protest period and additional filings before the authority is granted.
To activate your MC authority, you must:
- File proof of insurance with the FMCSA
- Submit a BOC-3 form designating a process agent
- Wait through the mandatory protest period
If all required filings are completed on time, your MC operating authority typically becomes active within about 20–25 business days.
If the required documents are not submitted within 90 days, the FMCSA may dismiss your application, and you will need to apply again.
Factors that affect the MC number processing timeline
9. How much does it cost to get an MC number?
It costs $300 to apply for MC operating authority. The Federal Motor Carrier Safety Administration (FMCSA) charges a $300 non-refundable application fee for each type of operating authority.
While getting a USDOT number is free, applying for MC authority requires this one-time federal fee. You may also have additional setup costs, including:
- BOC-3 process agent filing
- Liability insurance required by the FMCSA
- Third-party service fees if you use a registration service
If you use third-party filing services to help with registration and compliance filings, the total startup cost may range from about $400 to $500 or more, depending on the services selected.
Understand the fees required to get an MC number
10. Do I need insurance to get an MC number?
Yes, insurance is required to activate an MC number, but it is not needed when you initially submit the application. The FMCSA requires proof of liability insurance and a filed BOC-3 process agent form before the operating authority becomes active.
These requirements must typically be completed within 90 days of submitting the application. If the required insurance and filings are not submitted in time, the FMCSA may dismiss the application and you may need to reapply.
11. Do I need to display my MC Number?
No, MC numbers generally do not need to be displayed on commercial vehicles. The USDOT number is the primary identifier that must be displayed on trucks for identification and safety monitoring purposes under Federal Motor Carrier Safety Administration (FMCSA) regulations.
However, carriers that operate as for-hire transportation businesses in interstate commerce must still obtain MC operating authority if their operations require it.
If you are an owner-operator running under your own authority, you will need your own MC operating authority. If you are leased to a motor carrier, you typically operate under that carrier’s authority and do not need your own MC number.
12. Do you need an MC Number for a box truck?
Yes, you need an MC number if you operate a box truck as a for-hire carrier transporting regulated goods across state lines (interstate commerce). The Federal Motor Carrier Safety Administration (FMCSA) requires MC operating authority for carriers that provide transportation services for compensation in interstate trucking.
However, an MC number is usually not required if you operate only within one state (intrastate trucking), transport your own goods as a private carrier, or haul exempt commodities.
13. Do you need an MC Number for a cargo van?
Yes, you need an MC number if you operate a cargo van as a for-hire carrier transporting freight across state lines (interstate commerce). The Federal Motor Carrier Safety Administration (FMCSA) requires MC operating authority for carriers that transport regulated goods for compensation in interstate trucking.
However, an MC number is generally not required if you operate only within one state (intrastate trucking), use the cargo van for personal purposes, or haul exempt commodities that are not regulated by the FMCSA.
14. Do you need an MC number for hotshot trucking?
Yes, you generally need an MC number for hotshot trucking if you operate as a for-hire carrier transporting regulated freight across state lines. In most cases, hotshot operators must have both a USDOT number and an MC operating authority to legally haul freight in interstate commerce.
However, an MC number may not be required if you operate only within one state (intrastate) or haul exempt commodities, depending on state regulations.
15. Do I need an MC number to haul cars?
Yes, you need an MC number if you haul cars as a for-hire carrier transporting vehicles across state lines (interstate commerce). In these cases, both a USDOT number and MC operating authority are typically required to operate legally. If you transport vehicles only within one state (intrastate trucking), you may only need a USDOT number, depending on your state’s regulations.
16. How can I find my MC number?
You can find your MC number by searching the FMCSA SAFER website using your company name or USDOT number. The MC number will appear in your carrier registration details.
You can also check your authority status through the FMCSA Licensing and Insurance system or review the official documents you received when your operating authority was issued.
17. How to check the MC number status?
To check an MC number status, use the official FMCSA Licensing and Insurance (L&I) website. Enter the MC or USDOT number, complete the CAPTCHA, and click “HTML” under “View Details” to review the “Authority Status”. Statuses include active, inactive, or pending, and typically require a 20-25 day waiting period for new applicants.
How to search for an MC number?
18. How can I check if my MC number is active?
You can check if your MC number is active by visiting the FMCSA Licensing and Insurance (L&I) website. Enter your MC number or USDOT number, complete the CAPTCHA, and open the “View Details” section to review your authority status.
If your MC number shows active, it means the required 21-day protest period has passed, and your insurance filings are approved. If it shows Pending or Inactive, additional filings or approvals may still be required.
19. How do I reactivate my MC number?
To reactivate a revoked or inactive MC number, you must meet the FMCSA reinstatement requirements and submit a request through the FMCSA portal. This typically includes updating your registration, filing required documents, and paying a reinstatement fee.
To complete the process, you generally need to:
- Ensure active insurance filings are on record (such as Form BMC-91 or BMC-91X).
- File a BOC-3 process agent form if it is not already active.
- Update your USDOT registration using Form MCS-150, if required.
- Submit a reinstatement request and pay the $80 fee through the FMCSA system.
Once all requirements are met, the MC authority is usually reinstated within about 7–10 days.
20. Can I transfer my MC number?
Yes, an MC number can be transferred in certain situations, such as during a business sale, merger, or acquisition. The transfer typically requires submitting a request to the FMCSA through the ASK system and updating the company’s registration details.
In some cases, you may also need to submit Form MCSA-5889 and provide supporting documentation to complete the transfer. However, USDOT numbers cannot be transferred between entities.
21. Can I sell my MC number?
Yes, but only as part of selling the entire business entity, such as an LLC or corporation. An MC number cannot be sold or transferred as a standalone asset.
When ownership of the company changes, the new owner takes control of the business entity that holds the operating authority, which means the MC authority remains with that company. The Federal Motor Carrier Safety Administration (FMCSA) must be notified, and the company’s registration information must be updated to reflect the ownership change.
The USDOT number also remains tied to the same legal entity, so FMCSA records must be updated if ownership or company details change.
22. Can I operate without an MC number?
Yes, you can operate without an MC number in certain situations. This typically applies if you operate only within one state (intrastate trucking), haul your own company’s goods as a private carrier, or transport exempt commodities, such as certain agricultural products.
However, if you operate as a for-hire carrier transporting regulated freight across state lines, you must have an active MC number issued by the Federal Motor Carrier Safety Administration (FMCSA).
23. Can I operate my business while waiting for my MC number?
No, you cannot operate as a for-hire interstate carrier until your MC operating authority becomes active. The Federal Motor Carrier Safety Administration (FMCSA) requires a mandatory 21-day protest period, and operating before your authority is active can lead to penalties or being placed out of service.
However, you may still operate in certain situations, such as leasing onto another carrier’s authority, running intrastate loads with the required state permits, or hauling exempt commodities that do not require MC authority.
24. Can I cancel an MC number?
You must submit Form OCE-46 (Request for Revocation of Operating Authority) to the FMCSA through their online portal, fax, or mail to cancel your MC number. The form requires your MC docket number and a notarized signature.
If you are closing your trucking business completely, you should also update your USDOT registration using form MCS-150. After submission, it usually takes about 3–5 business days for the FMCSA to process the request.
25. Does an MC number make you tax-exempt?
No, an MC number does not make you tax-exempt. It is simply an operating authority issued by the Federal Motor Carrier Safety Administration (FMCSA) that allows certain carriers to operate in interstate commerce.
In some states, trucking businesses may qualify for tax exemptions on equipment, parts, or repairs, but these exemptions are based on state tax laws and business activities, not the MC number itself.
26. Can I use my MC number for my broker license?
No, you cannot use an MC number issued for motor carrier operations as a broker license. Although a company can hold both authorities, you must apply separately for Broker Authority through the Federal Motor Carrier Safety Administration (FMCSA).
To operate as a freight broker, you must also file a $75,000 surety bond (Form BMC-84) or establish a trust fund (Form BMC-85), which is specifically required for brokerage operations.
27. How do I reinstate my MC number?
To reinstate a revoked MC number, you must submit a reinstatement request through the Federal Motor Carrier Safety Administration (FMCSA) portal and make sure all required filings are active.
This typically includes:
- Updating your USDOT registration using Form MCS-150, if required
- Maintaining valid insurance filings, such as Form BMC-91 or BMC-91X
- Having a BOC-3 process agent form on file
You must also pay the $80 reinstatement fee. Once all required filings and payments are completed, the MC operating authority is usually reinstated within about 7–10 days.
28. Is the MC number going away?
Yes, the Federal Motor Carrier Safety Administration (FMCSA) has proposed phasing out MC numbers as part of a modernization effort. The agency plans to transition to a USDOT-only identification system that would consolidate carrier registration, safety records, and operating authority under a single number.
However, this change has not yet been fully implemented, and MC numbers are still required for operating authority where applicable. Carriers should continue using their MC number and USDOT number as required by current FMCSA regulations.
If the transition is finalized in the future, carriers may need to update signage, insurance filings, and other records to reflect the USDOT-only system.
29. How many digits are in an MC number?
An MC number typically contains 6 to 7 digits. It is assigned by the Federal Motor Carrier Safety Administration (FMCSA) when a carrier, broker, or freight forwarder receives operating authority. The number appears in the format MC-XXXXXX or MC-XXXXXXX, depending on when the authority was issued.
30. Does a dispatcher need an MC number?
No, dispatchers do not need their own MC number because they do not transport freight or operate trucks. Dispatchers typically work on behalf of motor carriers and use the carrier’s MC number and USDOT number when helping drivers find and book loads.
However, if a dispatcher begins acting as a freight broker by directly connecting shippers with carriers for a fee, they must obtain broker authority from the Federal Motor Carrier Safety Administration (FMCSA). Freight brokers are also required to maintain a $75,000 surety bond (Form BMC-84) or trust fund.
