MC Number
Motor Carrier Number issued by FMCSA that grants operating authority for interstate for-hire carriers to transport regulated commodities or passengers for compensation across state lines.
TL;DR
Federal operating authority number required for most for-hire interstate carriers and brokers transporting regulated freight or passengers.
Key Points
- ✓MC Number grants federal operating authority for interstate for-hire transportation, separate from DOT Number safety identification
- ✓Required for carriers transporting regulated commodities or passengers for compensation across state lines
- ✓Application requires BOC-3 process agent filing and insurance coverage filed directly with FMCSA
- ✓Ongoing compliance includes biennial updates, continuous insurance, and maintaining acceptable safety ratings
What is an MC Number?
An MC Number (Motor Carrier Number) is a federal operating authority identifier issued by the FMCSA that authorizes interstate for-hire carriers and brokers to transport federally regulated commodities or passengers for compensation across state lines. Unlike a DOT Number which serves as a safety identifier, an MC Number represents legal operating authority for commercial transportation services.
MC Number vs DOT Number: Key Differences
The distinction between these two numbers is critical for trucking operations:
- DOT Number: Safety identifier used to monitor carrier performance, inspections, audits, and crash data
- MC Number: Operating authority that identifies what types of for-hire services a company is legally authorized to perform
Simply put: DOT Number = who you are (safety ID); MC Number = what you're allowed to do (operating authority). Most for-hire carriers need both numbers to operate legally in interstate commerce.
Who Needs an MC Number?
According to FMCSA regulations, you must obtain an MC Number if you:
- Operate as a for-hire carrier transporting goods or passengers for compensation
- Transport or arrange transport of federally regulated commodities in interstate commerce
- Function as a freight broker arranging transportation services
- Operate passenger carriers across state lines
Exemptions from MC Number requirements include:
- Private carriers hauling only their own cargo (not for hire)
- Carriers exclusively transporting exempt commodities
- Operations within federally designated commercial zones
- Intrastate-only operations (state-specific authority may apply)
Types of Operating Authority
FMCSA issues different types of operating authority with corresponding prefixes:
- MC Numbers: For U.S.-based for-hire carriers and brokers
- FF Numbers: For freight forwarders who arrange, consolidate, and package freight
- MX Numbers: For Mexico-domiciled carriers operating in the U.S.
Within MC authority, common categories include Motor Carrier of Property (excluding household goods) and Motor Carrier of Household Goods, each with specific insurance and regulatory requirements.
How to Obtain an MC Number
The application process involves several critical steps through FMCSA's Unified Registration System (URS):
1. Application Submission
Complete the appropriate MCS-150 series forms based on your operation type. New applicants can apply for both DOT Number and MC Number simultaneously through the URS system.
2. Process Agent Designation (BOC-3)
File a BOC-3 form designating a process agent in every state where you conduct business, or select a company providing nationwide coverage. This agent accepts legal documents on your behalf.
3. Insurance Filing
Your insurance company must file required coverage directly with FMCSA. Minimum requirements vary by operation type:
- General freight: $750,000 public liability, $5,000 cargo
- Hazmat carriers: Up to $5 million depending on materials transported
- Passenger carriers: $1.5 million to $5 million based on seating capacity
4. Authority Activation
Once FMCSA accepts all required filings, your operating authority becomes active and appears in their public databases (SAFER, Licensing & Insurance systems).
Compliance Obligations
Maintaining an active MC Number requires ongoing compliance:
- Biennial Updates: Update registration data every two years to prevent deactivation
- Continuous Insurance: Maintain required insurance coverage; lapses result in automatic authority suspension
- Process Agent Maintenance: Keep BOC-3 filings current across all operating states
- Safety Compliance: Maintain acceptable safety ratings through CSA programs
Industry Impact and Practical Considerations
For carriers, an inactive MC Number immediately impacts operations. Load boards and brokers verify MC authority status before tendering freight, making authority suspension equivalent to business shutdown. The number appears on bills of lading, contracts, and insurance certificates, serving as proof of legal operating status.
Owner-operators must distinguish between company authority and personal authority. Drivers operating under company MC Numbers don't need personal authority, but independent contractors require their own MC Numbers for for-hire operations.
Registration Modernization
FMCSA's ongoing Registration Modernization initiative clarifies that MC Numbers serve as administrative identifiers for operating authority rather than statutory requirements. However, the underlying operating authority remains legally mandatory for for-hire interstate operations. The agency continues using MC Numbers in public systems while emphasizing DOT Numbers as primary identifiers.
Enforcement and Penalties
Operating without proper MC authority exposes carriers to significant penalties:
- Civil penalties up to $16,864 per violation for operating without authority
- Out-of-service orders during roadside inspections
- Criminal penalties for willful violations
- Equipment seizure in severe cases
State enforcement agencies coordinate with FMCSA to identify unauthorized carriers, making compliance verification routine during weigh station inspections and traffic stops.