How to Apply for an MC Number: Complete Process

For trucking companies looking to operate as for-hire carriers across state lines, obtaining an MC number is a critical step in securing the legal authority to conduct business. Issued by the Federal Motor Carrier Safety Administration (FMCSA), the MC number—short for Motor Carrier number—is what formally grants a carrier permission to transport regulated commodities or passengers in interstate commerce.

In this article, we’ll walk through the full application process, clarify what’s required, and break down each stage from preparation to activation.

 

What Is an MC Number?

An MC number is the identifier linked to a carrier’s operating authority. It’s what distinguishes private fleets from for-hire carriers and signals to the FMCSA that a company is legally permitted to transport goods or people across state lines.

If you’re hauling freight that doesn’t belong to you—or charging a fee to move it—an MC number is almost always required in addition to a DOT number. Without it, you’re not authorized to operate in interstate commerce as a for-hire carrier.

 

Step 1: Determine If You Need an MC Number

The FMCSA requires an MC number if your company:

  • Transports goods for compensation

  • Operates across state or national borders

  • Carries passengers for hire

  • Moves federally regulated commodities (including household goods, hazardous materials, and temperature-sensitive freight)

If you’re running a private fleet or staying entirely within one state, you may not need MC authority—but for most for-hire operations, it’s non-negotiable.

 

Step 2: Create an FMCSA Account

Before applying, create an account in the Unified Registration System (URS) on the FMCSA’s official website. This portal is where all MC and DOT applications are submitted.

You’ll be prompted to enter key business details, including your legal business name, tax ID, physical address, and contact information. Be sure everything matches your formal business registration to avoid delays.

 

Step 3: Complete the Online Application

Once your account is set up, the URS application will guide you through a series of questions tailored to your operation. You’ll need to specify:

  • Type of authority you’re requesting (e.g., common carrier of property)

  • Whether you’re a broker, passenger carrier, or freight hauler

  • The commodities you plan to transport

  • Whether you’ll own your own vehicles or lease equipment

Accuracy here matters. Any misclassification can result in delays or even rejection of your application.

 

Step 4: Pay the Application Fee

There is a non-refundable $300 fee for each operating authority requested. For most property carriers, this will be a single charge. If you apply for multiple authorities (e.g., both freight and passenger), each one requires a separate fee.

After payment, your MC number will be assigned—but it will not become active right away.

 

Step 5: Submit Required Filings

To complete the activation of your MC number, two additional filings must be submitted:

  1. Proof of Insurance – Your insurer must file Form BMC-91 or BMC-91X directly with the FMCSA. The amount and type of insurance depend on your operation and commodities.

  2. BOC-3 Form (Process Agent Designation) – This filing designates a legal agent in every state who can receive official documents on your behalf. You can submit this yourself or use a third-party filing service.

Both filings must be submitted before your authority becomes active.

 

Step 6: Wait Out the 21-Day Protest Period

After your MC number is issued, a 21-day public protest period begins. During this time, other carriers or interested parties may challenge your application—but in most cases, no objections are filed.

If all your documents are in order and there are no protests, your operating authority will become active at the end of this period. You’ll receive an official letter confirming your MC status.

 

Step 7: Monitor Application Status

You can check your application status on the FMCSA Licensing & Insurance (L&I) public portal. This is where your filings, insurance coverage, and final authority status are listed. Once your MC number is active, you’re legally authorized to begin operations.

Be sure to print and carry proof of your authority as part of your compliance documents during inspections or audits.

 

Final Thoughts

Applying for an MC number is a foundational step for any carrier looking to haul freight or passengers for compensation across state lines. The process is not overly complex, but it does require precision, compliance, and attention to timing—especially when it comes to insurance and process agent filings.

By understanding each stage and preparing your application correctly, you can avoid unnecessary delays and get your authority activated smoothly. For most carriers, the MC number isn’t just a formality—it’s a gateway to growth and legitimacy in the trucking industry.