International Registration Plan everything you need to know truckers wiki

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What is the International Registration Plan IRP

The International Registration Plan IRP simplifies the administrative process for registering and taxing commercial motor vehicles that operate in multiple jurisdictions.
The IRP is a cooperative agreement among U.S. states, the District of Columbia, and Canadian provinces that facilitates the registration and operation of commercial motor vehicles (CMVs) engaged in interstate travel. 
Learn about Cab Card here.

Here are the main features and points to know about the International Registration Plan in trucking.

Cross-Jurisdictional Travel

The IRP addresses the needs of commercial motor vehicles (CMVs) that travel across multiple jurisdictions, whether within the United States or between U.S. states and Canadian provinces. This is crucial for carriers engaged in interstate commerce, ensuring they can operate seamlessly without the burden of obtaining separate registrations for each jurisdiction.

Single Registration

Under the IRP, carriers obtain a single registration called an apportioned plate. This plate serves as a comprehensive proof of registration, enabling the vehicle to legally travel in all IRP member jurisdictions. It eliminates the need for carriers to manage numerous individual registrations in different states and provinces.

Prorated Registration Fees

IRP’s prorated registration fees are based on the principle of proportionality. Carriers pay fees based on the anticipated percentage of miles they will travel in each jurisdiction. This system ensures that registration fees accurately reflect the carrier’s actual use of roadways in different jurisdictions, providing a fair distribution of revenue among member states and provinces.

Simplified Administration

The IRP significantly simplifies the administrative process for carriers. Instead of dealing with the complexities of registering in multiple jurisdictions, carriers apply for registration and pay fees to their base jurisdiction. The base jurisdiction then manages the distribution of fees to other member jurisdictions, reducing administrative overhead and paperwork for carriers.

Apportioned Plates

Once registered through the IRP, carriers receive an apportioned license plate. This plate is recognized as valid documentation of registration in all IRP member jurisdictions. It helps law enforcement and other authorities quickly identify vehicles that are properly registered and authorized to operate in various states and provinces.

Reporting and Compliance

Carriers operating under the IRP are required to maintain accurate records of their mileage. These records serve as the basis for calculating prorated fees and ensuring compliance with registration obligations. Carriers must also maintain trip records that accurately document their operations in each jurisdiction.


The IRP’s standardized apportioned plates and registration documentation simplify enforcement efforts. Law enforcement agencies across member jurisdictions recognize these documents as evidence of proper registration. This facilitates efficient enforcement of regulations and helps ensure that CMVs are in compliance with registration requirements while traveling across various regions.


The IRP offers carriers operational flexibility. Carriers can adjust their routes and operations without the need to obtain new registrations for each jurisdiction they enter. This flexibility is essential for carriers navigating the dynamic nature of interstate commerce.

Apportionable Vehicles

Apportionable vehicles, often referred to as apportioned vehicles, are those that are used or intended to be used for the transportation of persons for hire or designed, used, or maintained primarily for the transportation of property. 

These vehicles have the characteristic of being operated in two or more IRP jurisdictions and have a gross vehicle weight rating (GVWR) of 26,001 pounds or more, or have three or more axles, regardless of weight.

The key criteria for a vehicle to be considered apportionable are:

  1. The vehicle is used or intended for use in two or more member jurisdictions (states or provinces).
  2. The vehicle is used for the transportation of persons for hire or is designed, used, or maintained primarily for the transportation of property.
  3. The vehicle meets one of the following criteria:
    • Has two axles and a gross vehicle weight or registered gross vehicle weight exceeding 26,000 pounds (11,793.401 kilograms).
    • Has three or more axles, regardless of weight.
    • Is used in combination, and the gross vehicle weight of the combination exceeds 26,000 pounds (11,793.401 kilograms).

Exceptions are provided for recreational vehicles, vehicles displaying restricted plates, and government-owned vehicles. Additionally, trucks or truck tractors, or combinations of vehicles with a gross vehicle weight of 26,000 pounds (11,793.401 kilograms) or less are optional for apportioned registration.

Learn about Heavy Vehicle Use Tax (Highway Use Tax) here.

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