How to Get Your MC Number and DOT Authority: The Complete New Carrier Compliance Guide

Every carrier hauling freight for compensation in interstate commerce needs operating authority from FMCSA. This guide walks through every required step — from the initial registration through the first 18 months of operation, including what to expect during the New Entrant Safety Audit that FMCSA conducts on every new carrier.

What the Regulation Actually Requires

The authority requirements for motor carriers are established at 49 CFR Part 365, with registration requirements at 49 CFR § 390.19 (USDOT number) and 49 CFR § 390.201 (operating authority). The distinction matters:

A USDOT number is required for any commercial motor vehicle operating in interstate commerce — including carriers who do not transport for compensation and private carriers. It is an identification number, not operating authority.

An MC number (Motor Carrier number) is operating authority — the permission to transport regulated commodities for compensation in interstate commerce. You cannot legally haul freight for hire without active operating authority, regardless of whether you have a USDOT number.

Step-by-Step Practical Breakdown

Step 1: Obtain Your USDOT Number

Register at register.fmcsa.dot.gov using the Unified Registration System (URS). You will need:

• Legal business name and entity type (sole proprietor, LLC, corporation)
• Employer Identification Number (EIN) or Social Security Number for sole proprietors
• Physical address — a P.O. Box is not sufficient
• Description of operation: type of carrier, cargo types, whether you carry hazmat or passengers

USDOT registration is free. The number is issued immediately. You will need it for every subsequent step.

Step 2: Apply for MC Operating Authority

Apply for authority through the same Unified Registration System. The application fee is $300 per authority type. After you apply, FMCSA publishes a 10-day protest period during which existing carriers can object to your authority. Protests are rare for freight brokers and standard motor carriers; they are more common for passenger carriers.

Your authority will show as "pending" until your insurance and BOC-3 are filed and the protest period closes. You cannot operate under pending authority.

Step 3: File a BOC-3 (Process Agent)

A BOC-3 designates a process agent in every state where you operate — a legal representative who can accept service of process on your behalf. Filing typically costs $25–50 through a registered process agent filing service. The filing is submitted directly to FMCSA electronically. This step is required before your authority will be activated.

Step 4: Obtain and File Your Insurance

Your insurance carrier files your policy directly with FMCSA using Form MCS-90 (surety bond or proof of insurance). The filing must meet federal minimum limits based on your operation type. Federal minimums by operation type are shown in the table below. Key points:

• The MCS-90 endorsement must be filed by your insurer — you cannot self-file
• Insurance must remain continuously on file; a lapse will result in automatic authority revocation
• If you are a broker, you need a $75,000 surety bond or trust fund agreement instead of liability insurance
• Cargo insurance is not federally required for most freight, but shippers and brokers will require it commercially

Step 5: Activate Your Authority

Once your BOC-3 is filed, insurance is on file, and the protest period closes, FMCSA will activate your authority. You will receive an Operating Authority Certificate (MC Certificate). Keep a copy in every vehicle. Your authority status is publicly visible at safer.fmcsa.dot.gov.

Step 6: Complete State-Level Registrations

Federal authority does not replace state requirements. After receiving your MC authority, you must complete:

• UCR (Unified Carrier Registration): Annual fee based on fleet size; required before January 1 of each operating year
• IRP (International Registration Plan): Apportioned registration for vehicles operating in multiple states; handled through your base state DMV
• IFTA (International Fuel Tax Agreement): Required for vehicles with two axles and GVW over 26,000 lbs or three or more axles operating in multiple IFTA jurisdictions; quarterly fuel tax reporting

What Auditors Actually Look For

FMCSA conducts a New Entrant Safety Audit on every new carrier within the first 18 months of operation. The audit is not optional and failure results in authority revocation. Auditors examine:

Active insurance on file: Auditors verify your MCS-90 filing is current and your coverage limits meet federal minimums. A lapsed policy is an automatic failure.

Driver qualification files: You must have a complete DQF for every driver — CDL copies, medical certificates, MVR, road test, employment application, and drug test results. Missing DQF documents are among the most common audit failures for new carriers.

Drug and alcohol testing program: You must have a DOT-compliant testing program in place before your first driver operates. Consortium enrollment records, testing policy, and pre-employment test results are reviewed.

ELD and HOS compliance: If you are ELD-required, auditors verify you have registered devices and drivers are using them. Paper logs are reviewed for completeness and accuracy.

Vehicle inspection records: Annual inspection reports for every vehicle must be on file, conducted by a qualified inspector. Auditors check dates, inspector qualifications, and whether defects were corrected.

Failing the New Entrant Safety Audit results in a "Unsatisfactory" safety rating and authority revocation. FMCSA does provide a 45-day remediation period for certain deficiencies — but the best approach is to be fully compliant before the audit occurs.