Federal guide
MC number: what it is and how to get one
An MC number is the docket FMCSA assigns when a for-hire carrier applies for interstate operating authority. Companies hauling federally regulated freight for compensation across state lines need one on top of a USDOT number. The application fee is $300 per authority type, and it is not refundable.
By Evan Reid, Founder of Haul Handbook · Updated Jul 18, 2026
What an MC number actually is
Operating authority is identified as an MC, FF, or MX docket number depending on the type granted. A company may need multiple operating authorities to cover its planned operations; each authority type dictates the operation, the cargo, and the insurance level required.
One distinction saves new carriers real trouble: An assigned MC or FF number is not operating authority. The company may not begin operating until it receives the certificate, permit, or license of operating authority by mail.
Who needs an MC number
Companies that transport passengers in interstate commerce for compensation, or transport federally regulated commodities owned by others (or arrange their transport) for compensation in interstate commerce, need interstate operating authority in addition to a USDOT number.
And who does not: Private carriers hauling their own cargo, for-hire carriers hauling exclusively exempt (not federally regulated) commodities, and carriers operating exclusively inside a federally designated commercial zone do not need interstate operating authority. Carriers staying inside one state answer to their state instead; see intrastate authority by state. Either way, the safety-registration side of the house is the USDOT number, a separate registration.
What an MC number costs
The application fee is $300, charged per authority type, so applying for two authority types costs $600. FMCSA does not refund application fees, even for mistaken or dismissed applications.
Two later-life fees worth knowing now: a name change costs $14 and reinstating a revoked authority costs $80. The docket fee is only one line of the real startup budget; the rest is tallied in how much it costs to start a trucking company.
How to apply
First-time applicants use the Unified Registration System (URS) online, for applicants who have never registered with FMCSA or received a USDOT number. Existing registrants can use the FMCSA legacy registration system online, or the paper OP-1 form series by mail. The paper series covers OP-1 (motor carrier of property (common or contract, including household goods) and broker of property or household goods); OP-1(P) (motor common or contract carrier of passengers); OP-1(FF) (freight forwarder of property or household goods).
The application is one step of seven. The full sequence, from USDOT number to mailed certificate, is our pillar walkthrough: how to get your own authority.
What happens after you file
When the application grant letter is mailed, the application is published in the FMCSA Register. Publication starts a 10 calendar day protest period during which any individual can file a protest stating why the company should not be issued operating authority.
FMCSA will not grant operating authority registration until the registrant has the minimum levels of financial responsibility (insurance) on file with FMCSA. Authority is issued as a certificate (motor carrier), permit (freight forwarder), or license (broker) only after FMCSA has approved the application, the insurance filing, and the process agent (BOC-3) filing, and the protest period has ended without protests. The two filings that gate the grant get their own guides: the BMC insurance filings and the BOC-3 process agent filing.
Grant status is checked on the FMCSA Licensing and Insurance (L&I) website by MC or USDOT number, under Authority History. Authority documents normally mail within 3 to 4 business days after the grant. Realistic start-to-finish timelines live in how long it takes to get authority.
MC number vs USDOT number
The USDOT number and operating authority are different registrations. The USDOT number is the safety identifier; the MC/FF docket is the for-hire authority. For-hire interstate carriers of regulated commodities need both. The full side-by-side, including who needs which and what each costs, is in operating authority vs USDOT number.
Frequently asked questions
How much does an MC number cost?
- FMCSA charges $300 per authority type, so applying for two authority types costs $600. FMCSA does not refund application fees, even for mistaken or dismissed applications.
Is an MC number the same as operating authority?
- The MC number is the docket identifier FMCSA assigns to your operating authority application. An assigned MC or FF number is not operating authority. The company may not begin operating until it receives the certificate, permit, or license of operating authority by mail.
How long does it take to get an MC number granted?
- New applications through the Unified Registration System take 20 to 25 business days, plus 8 or more additional weeks if the application is subject to further agency review. Mailed applications from existing carriers take 45 to 60 business days.
Do I need an MC number if I only haul my own freight?
- Private carriers hauling their own cargo, for-hire carriers hauling exclusively exempt (not federally regulated) commodities, and carriers operating exclusively inside a federally designated commercial zone do not need interstate operating authority.
What does it cost to fix or restore an authority later?
- A name change costs $14 and reinstating a revoked authority costs $80.
Sources
Primary statutes and official agency pages this guide relies on. Laws and fees change, so confirm against the current source before you act.
- Get Operating Authority (Docket Number) · Federal Motor Carrier Safety Administration (FMCSA), U.S. DOT
- Instructions for Form OP-1, Application for Motor Property Carrier and Broker Authority (Revised 01/10/2017) · Federal Motor Carrier Safety Administration (FMCSA), U.S. DOT
- Insurance Filing Requirements · Federal Motor Carrier Safety Administration (FMCSA), U.S. DOT
- Form BOC-3, Designation of Agents for Service of Process · Federal Motor Carrier Safety Administration (FMCSA), U.S. DOT
- Do I Need a USDOT Number? · Federal Motor Carrier Safety Administration (FMCSA), U.S. DOT
Haul Handbook publishes educational information about trucking registration and compliance requirements. This is not legal, financial, or tax advice. Rules, fees, and deadlines change; confirm with the agency before you file or pay.