Compliance FAQ
How many vehicles count for the UCR tier?
Count power units operated in interstate commerce - owned or leased, straight trucks and tractors. Exclude trailers, intrastate-only vehicles, dollies, and vehicles below the CMV threshold. Leased equipment counts toward the lessee's tier, not the lessor's.
Reviewed by Korey Sharp-Paar · Updated
Why does it matter?
The UCR tiers are: Tier 1 (0-2 power units), Tier 2 (3-5), Tier 3 (6-20), Tier 4 (21-100), Tier 5 (101-1,000), Tier 6 (1,001+). The count is taken from the carrier's most recent MCS-150 or the equivalent state-of-record vehicle count.
Power units include straight trucks, tractors, and CMV-grade vehicles operated in interstate commerce. Excluded: trailers, dollies, converter gear, intrastate-only vehicles, and any vehicle below the CMV threshold (10,001 lbs GVWR/GVW under 49 USC §31101 - not the higher 26,001-lb CDL line).
Leased-on owner-operators: the truck counts toward the lessee's (the carrier's) UCR tier. The owner-operator does not file separate UCR for that vehicle. If the OO has their own MC and runs other trucks under their own authority, those trucks count toward their own UCR tier.
A common mistake: counting trailers. A carrier with 8 owned trucks and 12 trailers is Tier 3 (8 power units), not Tier 4 (20 total). Trailers never count toward UCR.
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We prepare your UCR registration; it is submitted to the National UCR System. The UCR government fee is itemized separately from our service fee, and both are shown before you pay.
Submitted to the National UCR System.
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