UCR brackets / B4
Bracket B4 · 21–100 vehicles
UCR bracket B4: $1,163 for 2027
Bracket B4 covers carriers that operated 21–100 vehicles in the preceding year. The fee is $1,163 for the 2027 registration year, up from $963 in 2026, a rise of $200 or 20.8 percent.
- 12027 fee $1,163
- 22026 fee $963
- 3Increase 20.8%
- 4Vehicles 21–100 vehicles
What $1,163 buys, per truck
At the bottom of the bracket, 21 vehicles, the 2027 fee is $55.38 per vehicle; at the top, 100 vehicles, it is $11.63. The bracket you fall into is set by last year's count, so a carrier that grew from 21 to 100 trucks during 2026 pays the same $1,163 as one that stayed at 21 all year. The reverse holds too: a carrier that shrank from 100 to 21 still pays this bracket's fee because it operated 100 during the year.
The edges of bracket B4
Below: there is nothing below B4. Zero vehicles is still B4.
Above: one vehicle past 100 puts you in bracket B1 (0–2 vehicles) at $55, a step of $-1,108. The step is modest at this end of the schedule; the brackets widen sharply further up.
Twenty-one to a hundred: eighty vehicles, one fee
Eighty vehicles share one fee: a carrier with 21 vehicles and one with 100 pay the same $1,163. That makes the per-truck figure swing from $55.38 at the bottom to $11.63 at the top. Mid-size carriers in this range typically register UCR alongside their IRP renewal, since both are fleet-count filings handled by the same office in most base states, and both depend on an accurate count of power units operated in the prior year.
Registration years and sources
| Registration year | Bracket B4 fee | Source |
|---|---|---|
| 2026 | $963 | UCR Plan — fee brackets |
| 2027 | $1,163 | FMCSA final rule, 49 CFR 367.50 (FR Doc. 2026-17893, Docket FMCSA-2025-0655) |
2027 registration opened on October 1, 2026. The 2027 fee also applies to every later registration year until FMCSA adopts a new table by rule. Brackets did not change between the two years shown; only the dollar amounts did, by 20 percent on average across the schedule.
Who registers in bracket B4
Mid-size carriers and most private fleets of regional distributors; the bracket spans 21 to 100 vehicles. Anyone in the bracket who is engaged in interstate commerce to any extent must register; the rule is not about how far or how often.
Sources: FMCSA final rule, 49 CFR 367.50 (FR Doc. 2026-17893, Docket FMCSA-2025-0655); UCR Plan — fee brackets; UCR Plan — FAQ. Checked 2026-10-23.