MC Number & Operating Authority Guide

Not every trucking company needs operating authority — private fleets hauling their own goods and carriers of exempt commodities (unprocessed agricultural goods, most famously) run on a USDOT number alone. But haul regulated freight for hire across state lines, broker a load, or forward freight, and FMCSA requires authority first.

Who needs authority — and who does not

Authority is required for for-hire carriers transporting federally regulated commodities or passengers in interstate commerce, for brokers of property or household goods, and for freight forwarders. It is not required for private carriers hauling their own cargo, for-hire carriers hauling only exempt commodities (cargo not federally regulated — typically unprocessed and unmanufactured goods, fruits and vegetables), or operations entirely within a federally designated commercial zone.

One company can need several authorities — carrier plus broker is common — and each carries its own $300 fee and its own insurance or bond obligations. Household-goods carriers additionally file cargo insurance; property carriers file public liability only.

The process

Apply through FMCSA’s registration system (Motus; the OP-1 form series covers paper). Publication in the FMCSA Register starts a 10-calendar-day protest window during which anyone may object. Before authority issues, two more things must be on file: minimum financial responsibility, filed directly by your insurer on BMC-91 or BMC-91X, and the BOC-3 process-agent designation. FMCSA states plainly that authority is not granted until the insurance is in effect and on file.

Watch the identifier change: FMCSA has proposed no longer assigning MC numbers at all, making the USDOT number the sole identifier for all registrants. It is a proposal — open to rulemaking comment, not in effect — and Motus continues to issue docket numbers with MC/MX/FF prefixes for now. Write your compliance calendar in pencil on this one.

The system behind it: Motus

FMCSA replaced its legacy registration stack in 2026: Motus Phase I launched December 8, 2025 for supporting companies (BOC-3 blanket filers, insurance filers), Phase II brought in all regulated entities, and the old Unified Registration System went permanently offline May 14, 2026. If a guide or service walks you through URS screenshots, it predates the switch.

Frequently asked questions

What is the difference between a USDOT number and an MC number?⌄

The USDOT number is the universal safety identifier every interstate operator over the thresholds must have; the MC number is operating authority, needed only by for-hire carriers of regulated commodities or passengers, brokers, and freight forwarders. A private fleet needs the first and not the second.

How much does an MC number cost?⌄

Each operating authority is a one-time, non-refundable $300 — and a company needing multiple authorities (say, carrier and broker) pays $300 for each, with separate insurance or bond filings per authority.

How long does it take to get operating authority?⌄

The protest period alone is 10 calendar days from publication in the FMCSA Register, and authority will not issue until your insurer’s BMC-91/91X filing and your BOC-3 process-agent designation are both on file. Line up the insurance and process agent when you apply, not after.

Are MC numbers going away?⌄

FMCSA has proposed it — making the USDOT number the sole identifier — but the change is a pending rulemaking, not current law. Docket numbers with MC prefixes are still being issued through Motus.

Related guides

Official sources

Agency rules, fees and contacts can change — confirm current requirements with the agency before acting. This guide is general information for truckers, not tax or legal advice.

MC Numbers and Operating Authority: Who Needs Them