Compliance
UCR Explained: The Unified Carrier Registration Fee Every Interstate and Canadian Carrier Pays
The Unified Carrier Registration is an annual fee, not a credential: nothing to carry, nothing to display, and a citation at roadside if the database shows it unpaid. Here's who must register, how the fee brackets work by fleet size, why a Canadian carrier operating in the US is included, and when the annual window opens.

What UCR Is
The Unified Carrier Registration program is a federal-state system under which motor carriers, brokers, freight forwarders and leasing companies operating in interstate or international commerce in the United States pay an annual fee, apportioned among the participating states to fund motor carrier safety enforcement. It replaced the old Single State Registration System. There is no plate, card or decal: registration is recorded against the carrier's USDOT number in a national database, and roadside officers check the database.
Who Must Register
Any carrier with a USDOT number operating a commercial motor vehicle across a state line or across the US border, whether for-hire or private, and any broker, freight forwarder or leasing company in interstate commerce. Canadian and Mexican carriers operating in the US are included and register through a base state; the program treats them like a US carrier. Purely intrastate carriers are exempt. A handful of states do not participate in UCR, but a carrier based in one still registers, through a designated neighbouring state, if it operates interstate.
The Fee Brackets
The fee depends on the number of commercial motor vehicles the carrier operated in interstate commerce, counted as of the previous year's registration or the fleet on the MCS-150 form, in brackets: zero to two vehicles, three to five, six to twenty, twenty-one to one hundred, one hundred one to one thousand, and over a thousand. Brokers and forwarders without vehicles pay the lowest bracket. The amounts are set annually by the UCR board and are modest for small fleets and substantial at the top. Registration for the coming year opens in the autumn, and enforcement of the new year begins January 1.
Getting It Right
The two common failures are forgetting the annual renewal, since nothing expires visibly, and counting the fleet wrong, since the count should match the interstate fleet on the MCS-150. A telematics vehicle group of the units that actually cross state lines is the honest count, and it is the same group that carries IRP plates and files IFTA. High Point GPS reviews the UCR, IRP, IFTA and ELD obligations together when onboarding carriers in Quebec, Ontario and the northeastern US that run into the United States.
Frequently asked questions
What is UCR?
The Unified Carrier Registration, an annual fee paid by carriers, brokers, forwarders and leasing companies in interstate or international commerce in the US, recorded against the USDOT number with no credential to carry.
Do Canadian carriers need UCR?
Yes, if they operate in the United States. They register through a base state like a US carrier.
How is the UCR fee set?
By fleet size bracket, from zero-to-two vehicles up to over a thousand, with amounts set annually by the UCR board.
Is there anything to display on the truck?
No. Registration is checked against the national database at roadside.
When is UCR due?
Registration for the next year opens in the autumn and must be complete before January 1, when enforcement begins.
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