Common carrier MC vs broker MC
A common carrier MC physically transports freight using its own equipment and drivers under 49 USC §13902 motor-carrier authority. A broker MC arranges transportation between shippers and motor carriers under 49 USC §13904 broker authority, taking a margin without owning equipment. Different operational requirements, different financial-responsibility filings, different regulatory exposure.
Side-by-side comparison
| Dimension | Common Carrier MC | Broker MC |
|---|---|---|
| Authority | 49 USC §13902 | 49 USC §13904 |
| What it does | Physically transports freight | Arranges transportation |
| Equipment | Required (owned or leased) | None — broker doesn't haul |
| Drivers | Required (employed or owner-op) | None |
| Financial responsibility | BMC-91 BIPD ($750k+) | BMC-84 bond or BMC-85 trust ($75k) |
| Cargo insurance | Carmack-required carrier liability | Not required (contingent optional) |
| FMCSA scoring | SMS BASIC scores | No BASIC scores (no inspections) |
When to choose common carrier MC
Common carrier MC is the right call for any operation that owns trucks and intends to physically transport freight for compensation. The §13902 authority covers the physical-transport business model — the carrier owns or leases equipment, employs drivers (or operates as an owner-operator), and accepts compensation for moving freight from shipper to consignee. Operating costs include equipment, fuel, drivers, BIPD insurance, cargo insurance, maintenance, and the operational compliance overhead of §391-§396 driver and equipment regulations.
Common carrier MC is also subject to FMCSA SMS scoring (Safety Measurement System) — the BASIC scores that surface on every roadside inspection and crash. Brokers and shippers vetting carriers check SMS BASIC scores before adding the carrier to approved lists. A clean SMS profile is one of the carrier's most valuable assets; a deteriorating SMS profile can lock the carrier out of broker freight.
When to choose broker MC
Broker MC is the right call for an operation that arranges transportation without owning equipment. The §13904 authority covers the matching business model — the broker contracts with shippers to arrange transportation, contracts with motor carriers to physically perform it, and takes a margin between what the shipper pays and what the carrier accepts. Operating costs are dramatically lower because the broker doesn't own equipment, employ drivers, or bear vehicle-operating risk. The main capital outlay is the $75,000 BMC-84 surety bond or BMC-85 trust fund.
Brokers don't face SMS BASIC scoring because they don't physically operate vehicles — there are no roadside inspections of brokers, no crash data on brokers. The broker's reputation runs on payment timeliness (paying contracted carriers within agreed terms) and on the volume of shipper relationships the broker maintains. Slow-paying brokers struggle to recruit carriers; high-volume brokers with strong payment histories build a roster of preferred carriers that gives them load-acceptance reliability.
When to hold both
Mid-size and larger fleets often hold both MC types — operating their own equipment under the carrier MC and brokering out demand spikes under the broker MC. The combined operation lets the fleet absorb capacity volatility: when shipper demand exceeds the carrier's in-house capacity, the broker MC accepts the excess demand and arranges third-party carrier execution. The carrier captures both the carrier-side margin (on its own equipment runs) and the broker-side margin (on third-party arranged runs).
Each MC has its own OP-1 application, its own financial-responsibility filing (BMC-91 for carrier, BMC-84 for broker), and its own ongoing compliance overhead. The two MCs are typically held by a single legal entity but operate as separate FMCSA-recognized authorities. Best practice is to clearly separate accounting and contractual flows between the two operations so disputes (broker non-payment, carrier cargo claims) don't cross-contaminate.
Frequently asked questions
Can the same legal entity hold both a common carrier MC and a broker MC?
Yes. A single legal entity can hold both MC types — typical at mid-size and larger fleets that operate their own equipment plus broker out demand spikes. Each MC has its own OP-1 application and separate financial-responsibility filing (BMC-91 BIPD for the carrier MC, BMC-84 surety bond for the broker MC).
Is a broker required to carry insurance on the freight?
No. The §387.301 broker financial-responsibility requirement is the $75,000 surety bond (BMC-84) or trust fund (BMC-85) — protection for shippers and contracted carriers from broker non-payment. Cargo insurance covers physical damage to freight and is the contracted carrier's responsibility under the Carmack Amendment, not the broker's.
What does the SAFER snapshot show for each MC type?
For a common carrier MC, SAFER shows the BMC-91 BIPD insurance status, BOC-3 process-agent status, USDOT, fleet size, and safety BASIC scores. For a broker MC, SAFER shows the BMC-84/BMC-85 financial-responsibility filing, BOC-3 process-agent status, and the broker registration status — but no BASIC scores because the broker doesn't physically operate vehicles.
Related comparisons
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