Broker Authority vs Motor Carrier Authority

Broker authority and motor carrier authority are not two flavors of the same license. They are two separate FMCSA filings, with separate fees, separate financial-responsibility requirements, and separate MC numbers. A company that hauls freight and also brokers overflow loads needs both. A company that only books loads for someone else's trucks needs only broker authority. Filing the wrong one — or assuming one covers the other — is the single most expensive sequencing mistake a new carrier can make.

Two Authorities, Two Statutory Definitions

The legal foundation is 49 USC §13902. The statute defines a motor carrier as a person providing motor-vehicle transportation for compensation, and a broker as a person who arranges transportation of property by a motor carrier for compensation. The two definitions overlap in the word “compensation” and diverge on the word “providing.” A motor carrier physically moves the freight under its own equipment and crew. A broker arranges for someone else to move the freight and never takes possession of the load.

FMCSA implements the distinction at the registration layer. Motor carriers receive an MC number under operations classification “Authorized For-Hire.” Brokers receive an MC number under classification “Broker of Property” (or “Broker of Household Goods” for HHG). Both are filed through Motus (motus.dot.gov, the successor to Form OP-1 through the Unified Registration System), but they are independent applications. Each costs $300. Each has its own MC number. Each is listed separately in FMCSA's records.

Different Bond, Different Insurance

The most concrete difference between the two authorities is in the financial-responsibility layer. Motor carriers and brokers post different filings, and the filings are not interchangeable.

• Motor carriers file a BMC-91 or BMC-91X primary liability filing under 49 CFR §387.7–§387.9, with a minimum of $750,000 in public liability coverage (higher for hazmat). The insurer files the BMC-91 directly with FMCSA; the carrier just maintains the underlying policy.
• Property brokers and household-goods brokers file a BMC-84 surety bond ($75,000) or a BMC-85 trust fund($75,000) under 49 CFR §387.307. The bond protects shippers and motor carriers downstream if the broker fails to pay. Underwriting runs a few days to two weeks for a new broker, with annual premiums of roughly 1–4% of the face value depending on credit.

A broker who tries to satisfy MC-B activation by filing a BMC-91 will fail vetting. A motor carrier that posts a BMC-84 instead of BMC-91 cannot dispatch trucks. The two filings serve different purposes and the FMCSA system rejects substitutions.

When You Need Both

A carrier that occasionally accepts more loads than it can run with its own equipment, and offloads the surplus to a partner carrier, is brokering. The moment money flows from the original shipper to the carrier and from the carrier to a downstream truck, the carrier is operating as both a motor carrier (on its own loads) and a broker (on the offloaded ones). Doing this without a separate MC-B authority is a federal violation.

The fix is mechanical: file two OP-1 applications — one for MC, one for MC-B — and post both the BMC-91 (for the carrier side) and the BMC-84 (for the broker side). The BOC-3 process-agent designation (BOC-3 filing) covers both authorities under a single filing, so there is only one BOC-3 to file regardless of how many authorities the company holds.

Cost Comparison: Carrier-Only vs. Broker-Only vs. Both

The first-year cost shape differs sharply by authority type:

Sequencing the Two Filings

When a company files for both authorities, the cleanest sequence is to file both applications together so the FMCSA reviews run in parallel. The BMC-91 and BMC-84 can be lined up while FMCSA processes the applications, and the BOC-3 designation covers both authorities once it is on file. Filing the second authority weeks after the first starts a fresh FMCSA review for it and stretches the timeline unnecessarily.

Bottom line: Broker authority and motor carrier authority are separate FMCSA filings — separate $300 fees, separate MC numbers, separate financial-responsibility requirements (BMC-91 vs. BMC-84). A company that hauls and brokers needs both. Treating one as a substitute for the other is a federal compliance violation.