UCR vs IRP: federal registration vs apportioned plate
UCR is a federal interstate-carrier registration under 49 USC §14504a tied to your USDOT/MC number, paid annually at flat per-fleet-size rates by December 31 through any of the 41 UCR-participating states. IRP is a multistate plate-apportionment system under the IRP Plan and 49 CFR Part 384 that distributes vehicle registration fees across the states a qualified motor vehicle operates in, proportional to miles driven in each jurisdiction. UCR applies to any interstate carrier operating commercial motor vehicles of 10,001+ lbs GVWR or GVW; IRP applies to qualified motor vehicles (over 26,000 lbs GVW or three or more axles) running in two or more member jurisdictions - they cover different things and one cannot substitute for the other. UCR is a flat carrier-level fee tied to fleet bracket; IRP is per-vehicle, per-state, and is paid to the carrier's base jurisdiction (typically the state of legal domicile), which then redistributes apportioned shares to other IRP member jurisdictions. Both are checked at state weigh stations via PRISM and IRP databases.
Side-by-side comparison
| Dimension | UCR | IRP |
|---|---|---|
| What it registers | The carrier (entity-level, by USDOT) | A specific vehicle (license plate, by VIN) |
| Legal source | 49 USC §14504a | IRP Plan (multistate compact) |
| Who must file | All interstate carriers (for-hire and private) | Operators of qualified motor vehicles in 2+ IRP jurisdictions |
| Fee basis | Flat by 6-bracket fleet size | Apportioned: each state's commercial registration × miles in state ÷ total miles |
| Renewal cadence | Annual, due Dec 31 | Annual (states stagger renewal months) |
| Filed with | Base-state UCR administrator | Base-jurisdiction DMV/MVD/DOR |
| Reciprocity | One filing covers all 50 states + D.C. | One apportioned plate covers all IRP jurisdictions for that vehicle |
When you need UCR
Every interstate carrier needs UCR - fleet size from 1 to 1,000+, for-hire or private, general property or HazMat. The fee schedule is set annually by FMCSA per 49 USC §14504a; for 2026 the brackets are: 0–2 vehicles $80, 3–5 $225, 6–20 $415, 21–100 $1,295, 101–1,000 $7,837, 1,001+ $76,479. Pay once per year and the registration is good in all 50 states + D.C.
When you need IRP
IRP is required when a carrier operates a qualified motor vehicle (>26,000 lb GVWR or 3+ axles) in two or more IRP member jurisdictions (48 U.S. states, D.C., and 10 Canadian provinces - Alaska and Hawaii are not in IRP). The carrier's base-jurisdiction DMV issues a single "apportioned plate" that covers all IRP jurisdictions for the year, and the apportionment formula splits the registration fees among states based on miles driven the prior year.
Workflow: apply IRP first, UCR second
For a new authority, IRP is part of the launch sequence - you cannot operate the truck without a plate. UCR follows once the carrier has an MC number and counts the trucks in service. The IRP plate is a vehicle-level identifier; UCR is a carrier-level identifier. Both renew annually but on different cycles, so most carriers calendar both in a single "Q4 compliance review."
Frequently asked questions
Is UCR the same as my IRP plate?
No. UCR is a federal interstate-carrier registration tied to your USDOT/MC number - it covers the carrier as a whole, not any specific vehicle. IRP is a multistate plate program that apportions vehicle registration (the metal plate on the bumper) across all the states a CMV operates in. UCR fees are flat by fleet size; IRP fees are proportional to miles driven in each member state.
Do I need IRP if I only operate in one state?
No. IRP is only required for interstate operation of a qualified motor vehicle (>26,000 lb GVWR or 3+ axles). Pure-intrastate carriers register a normal commercial plate at their state DMV. UCR also does not apply to purely intrastate operations - it is a federal interstate filing.
Which agency runs which?
UCR is administered by the Unified Carrier Registration Plan, a nonprofit overseen by FMCSA, and processed through state UCR administrators. IRP is administered by IRP, Inc., a multistate compact, and processed through each carrier's base-jurisdiction DMV.
File your UCR - $80 base, $70 with subscription
FastUCR handles the federal registration. For IRP plate work, see the bespoke filing options at fasttruckingcompliance.com.
File UCR - from $70