Glossary · Operating Authority & Compliance
MC Number (MC#).
Federal operating authority number issued by FMCSA that identifies for-hire interstate motor carriers and brokers.
What it is
An MC Number — short for Motor Carrier Authority Number — is the federal operating-authority identifier issued by the Federal Motor Carrier Safety Administration (FMCSA). It is required for any for-hire interstate motor carrier or broker transporting regulated commodities.
The MC# is distinct from the DOT Number. A DOT Number identifies any vehicle requiring federal safety oversight; an MC# identifies the operating-authority entity legally permitted to haul for hire across state lines. A carrier needs both — DOT for safety, MC for authority.
The FMCSA charges a $300 filing fee for a new MC#. After filing, the application enters a published-availability period during which protests can be filed against the applicant. Activation typically takes 21 days after that period closes. New entrants also complete the FMCSA New Entrant Safety Assurance Program over the first 18 months of operation.
Why it matters for trucking finance
Without an active MC#, a for-hire carrier cannot legally invoice for interstate freight, cannot book most loads on load boards, and cannot qualify for trucking-specific factoring or financing on most lender panels. The MC# is the threshold compliance signal every trucking lender and factor checks first.
Many lenders require an active MC# for at least 6 months before underwriting on standard equipment financing or working capital. Some accept brand-new authority — but typically with a co-signer, a larger down payment, or a new-authority program built specifically for first-year carriers. Factoring companies will onboard new authority with a clean broker-credit profile, but the rate spread is wider until 90 days of clean payment history is established. MC# inactivation — for missed UCR, lapsed insurance, or BOC-3 issues — triggers immediate factoring suspension on most contracts.
Related terms
- DOT Number (USDOT) — USDOT-issued registration number identifying any vehicle subject to federal safety oversight, including private and for-hire carriers.
- BOC-3 — FMCSA filing designating process agents in every state where a carrier operates, required to activate operating authority.
- UCR — Annual federal fee program funding state-level commercial-vehicle enforcement, required for interstate carriers regardless of state of registration.
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