UCR (Unified Carrier Registration)
An annual, state-administered fee program that interstate motor carriers, brokers, freight forwarders, and leasing companies must pay to fund state safety enforcement. Fees are set in brackets based on fleet size and change year to year. Lapsed UCR is a common roadside enforcement trigger and an early signal of administrative neglect.
Learn moreWhat is UCR?
The Unified Carrier Registration program is a federally mandated, state-administered fee system created by the UCR Act of 2005 to replace the old Single State Registration System. Every entity operating in interstate commerce — motor carriers, property brokers, freight forwarders, and vehicle leasing companies — must register annually and pay a fee through its base state, even if it owns no vehicles. Fees are tiered into brackets based on the number of commercial vehicles in the fleet; brokers and forwarders without vehicles pay the lowest bracket. The specific dollar amounts are adjusted periodically by the UCR Board and FMCSA, so they should never be hardcoded into compliance logic. Not all states participate in UCR, but carriers domiciled in non-participating states must still register through a designated base state. UCR revenue funds state motor carrier safety programs and enforcement. Registration status is checked at roadside and during compliance reviews — an unregistered interstate carrier can be fined, and repeated lapses correlate with the broader pattern of administrative non-compliance (late MCS-150 filings, insurance gaps) that vetting programs treat as a risk signal.
Why does ucr matter?
Insurance Underwriters
UCR non-compliance rarely drives a decline on its own, but it clusters with the carriers who also miss biennial updates and let insurance filings lapse — it is a cheap early indicator of back-office breakdown.
Freight Brokers
A carrier that skipped its annual UCR registration is one roadside stop away from a citation and a delayed load; treat a UCR lapse as a prompt to check the rest of the carrier's compliance picture.
Developers & Platforms
UCR fee brackets change annually — never hardcode dollar amounts. Key vetting logic on registration status and fleet-size consistency (compare reported power units against UCR bracket) rather than fee values.
Key values & thresholds
| Category | Value |
|---|---|
| Who Must Register | Interstate carriers, brokers, forwarders, leasing cos. |
| Fee Basis | Bracketed by fleet size |
| Renewal Cycle | Annual, per calendar year |
| No-Vehicle Entities | Pay lowest bracket |
Frequently asked questions
Who is required to pay UCR fees?
Every entity engaged in interstate commerce — motor carriers, property brokers, freight forwarders, and vehicle leasing companies — must register with UCR annually and pay the applicable fee. This includes brokers and forwarders that own no trucks at all; they simply pay the lowest fee bracket. Intrastate-only carriers are exempt unless they haul freight moving in interstate commerce. Registration is handled through the entity's base state, and carriers based in non-participating states must designate a participating base state instead.
How much does UCR registration cost?
UCR fees are tiered into brackets based on the number of commercial motor vehicles in the fleet, from zero-vehicle brokers at the bottom to fleets of over a thousand vehicles at the top. The exact dollar amounts are set by the UCR Board and FMCSA and are adjusted year to year, sometimes downward, so any specific figure goes stale quickly. Check the current year's fee schedule at ucr.gov rather than relying on cached amounts — and never hardcode fee values into compliance software.
Is UCR the same as operating authority or a DOT number?
No. A DOT number identifies the entity, operating authority grants the legal right to haul for-hire freight interstate, and UCR is a separate annual fee program that funds state enforcement. A carrier can hold active authority and still be out of UCR compliance, and vice versa. All three are independent requirements for interstate for-hire operation. Vetting workflows should check each separately — UCR status does not appear in authority or insurance filings.
Related terms
DOT Number (USDOT Number)
A unique identifier assigned by the U.S. Department of Transportation to every motor carrier, broker, and freight forwarder in interstate commerce. The DOT number is the primary key for looking up safety records, insurance, and authority in FMCSA databases. CarrierOk indexes every DOT number on the federal register.
FMCSA (Federal Motor Carrier Safety Administration)
The federal agency within the U.S. Department of Transportation that regulates the trucking and bus industries. FMCSA issues operating authority, sets safety standards, and maintains the databases — SAFER, SMS, MCMIS, L&I — that CarrierOk re-indexes the moment they publish updates, to power its carrier intelligence platform.
MC Number (Motor Carrier Number)
A docket number assigned by FMCSA to for-hire carriers and brokers when they register for operating authority. Unlike DOT numbers (required for all interstate CMV operators), MC numbers are specific to for-hire and brokerage operations. CarrierOk supports lookup by MC number, DOT number, or legal name.
Interstate vs. Intrastate Operation
The jurisdictional line that determines whether a carrier needs federal operating authority and FMCSA insurance filings. Interstate commerce — crossing state lines, or hauling freight that does — triggers federal requirements; intrastate-only carriers answer to their state instead. Vetting logic that demands federal authority from every carrier flags legitimate intrastate operators as failures.
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