What Is an MC Number and Who Needs One
An MC (Motor Carrier) number is your interstate operating authority issued by the FMCSA. Without it, you cannot legally haul freight for hire across state lines. Every for-hire carrier and freight broker operating in interstate commerce needs one.
The MC number is different from your USDOT number. Your DOT number identifies your company for safety purposes. Your MC number authorizes you to operate as a for-hire carrier. You need both. Some carriers operating only within one state may only need a DOT number, but the moment you cross a state line with someone else's freight, you need an MC.
The Application Process
Go to the FMCSA's Unified Registration System (URS) at fmcsa.dot.gov/registration. Create an account and file Form OP-1. The filing fee is $300 per authority type. You will choose between common authority (haul for the general public), contract authority (haul under specific contracts), and broker authority.
After filing, your application enters a 10-day protest period where existing carriers can object. Protests are rare for new carrier applications. After the protest period, your authority status changes to 'Granted' but it is not yet 'Active.' To activate it, you need to file proof of insurance (Form BMC-91 or BMC-91X) and a BOC-3 designation of process agents.
Insurance and Activation Requirements
Your insurance provider files the BMC-91 or BMC-91X form electronically with the FMCSA showing you carry the required minimum insurance: $750,000 liability for general freight, $1,000,000 for hazmat. Most brokers require $1M regardless of what you haul, so get the higher amount.
You also need a BOC-3 filing, which designates a process agent in every state. Companies like National Permit Service or CT Corporation handle this for $30-50. Once insurance and BOC-3 are filed and processed, your authority status changes to 'Active' and you can start hauling.
Timeline and Total Costs
From start to finish, expect 3-4 weeks. The filing itself takes 30 minutes online. The 10-day protest period is mandatory. Insurance filing takes 1-3 business days. BOC-3 processing takes 1-2 days. Total costs: $300 FMCSA filing fee, $30-50 BOC-3, plus your first insurance payment.
Common delays: incorrect information on the application (double-check your EIN, legal entity name, and address match exactly), insurance not filed correctly (work with a trucking-specialized insurance agent), or missing BOC-3. The FMCSA does not notify you of problems — you have to check your application status online regularly.
Frequently Asked Questions
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