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Glossary · updated October 30, 2026

UCR Vehicle Count

Also known as: CMV Count, Power Unit Count

By Korey Sharp-Paar · Reviewed by the Fast Trucking Compliance team

Definition

The UCR vehicle count is the number of commercial motor vehicles used to place a carrier in its UCR fee bracket. UCR counts power units - trucks and tractors - reported on your most recent MCS-150, not trailers. Carriers may exclude vehicles used exclusively in intrastate commerce. An undercount that lands you in too low a bracket is a common enforcement flag; an overcount means you overpay. The count places the carrier in one of six brackets, from 0–2 vehicles to 1,001 or more, and brokers, forwarders and leasing companies with no power units pay the 0–2 bracket.

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How to Count Your UCR Fleet

UCR counts self-propelled power units only - never trailers. Count vehicles at 10,001 lbs GVWR or more per 49 USC §31101, using your MCS-150 or the June 30 actual count.

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