What is a Motor Carrier Authority? A Trucking Insurance Guide

Motor carrier authority — often called an “MC number” or “operating authority” — is the federal license granted by the FMCSA that permits a trucking company to haul freight for compensation in interstate commerce. Without it, you cannot legally operate as a for-hire motor carrier crossing state lines. Getting your authority is the first major milestone for any new trucking business, and it comes with specific insurance requirements that must be satisfied before your authority activates.

What Is Motor Carrier Authority?

Motor carrier authority is issued by the Federal Motor Carrier Safety Administration (FMCSA). It assigns you two key identifiers:

• USDOT Number – A unique identifier for your business used for safety monitoring, inspections, and crash reporting. Required for interstate commerce.
• MC Number – Operating authority specifically for for-hire carriers transporting regulated commodities or passengers across state lines. You need this to legally bill shippers for hauling their freight.

Some carriers only need a USDOT number (private carriers transporting their own goods). For-hire carriers who want to be paid to haul other people’s freight need both a USDOT number and an MC number.

According to Nazar Mamaev, trucking insurance specialist at Full Coverage LLC, “Getting the MC number is just the beginning. What most new operators don’t realize is that your authority stays ‘pending’ until your insurance is filed with FMCSA. That insurance filing is what activates your ability to operate — without it, you have an MC number but can’t legally haul a load.”

How to Get Motor Carrier Authority

• Step 1: Apply at the FMCSA Unified Registration System (URS) at fmcsa.dot.gov — $300 registration fee
• Step 2: Obtain your USDOT number (immediate) and MC number (assigned within days)
• Step 3: File a BOC-3 (designation of process agents in all states you’ll operate) — $30–$75 through a process agent service
• Step 4: Purchase qualifying liability insurance and have your agent file Form BMC-91 or BMC-91X with FMCSA
• Step 5: Wait out the 10-business-day protest period
• Step 6: Authority activates — you can start hauling freight for hire

Insurance Requirements for Motor Carrier Authority

Federal minimum insurance requirements by carrier type:

• General freight (dry van, flatbed, most commodities): $750,000 primary liability minimum
• Household goods movers: $750,000 minimum
• Passenger carriers (buses): $1,000,000–$5,000,000 depending on vehicle size
• Hazardous materials: $1,000,000–$5,000,000 depending on the hazmat class
• Oil and explosive transporters: Up to $5,000,000 required

Your insurance agent files the BMC-91 (insurance on file) or BMC-91X (blanket bond) directly with FMCSA electronically. This is different from your COI — it’s a specific federal filing. Once received, FMCSA updates your authority status. Total activation typically takes 20–30 calendar days from initial application.

Frequently Asked Questions About Motor Carrier Authority

What is a motor carrier authority?

It’s the federal operating permission (MC number) from FMCSA that allows you to haul freight for hire across state lines. Required for all for-hire interstate motor carriers.

How long does it take to get motor carrier authority?

Typically 20–30 calendar days after applying and completing all filings. The 10-business-day protest period is mandatory and cannot be waived.

What insurance is required for motor carrier authority?

Minimum $750,000 primary liability for most general freight, filed with FMCSA via BMC-91 or BMC-91X. Higher limits required for hazmat and passenger carriers.

Get Insurance for Your New Motor Carrier Authority

New authority? Full Coverage Insurance specializes in new authority trucking insurance with fast BMC-91 filings to activate your MC number. Get a quote at myfullcoverage.com or call 317-427-5599.