International Registration Plan (IRP)

International Registration Plate


The International Registration Plan (IRP) is a program for licensing commercial vehicles in interstate operations among member jurisdictions (states or provinces). The member jurisdictions of IRP are all states (except Alaska and Hawaii), the District of Columbia, and the Canadian provinces (except Yukon and Northwest Territory).

Under this program, an interstate carrier files an apportioned registration application in the state or province where the carrier is based (the base jurisdiction). The fleet vehicles and the miles traveled in each state are listed on the application. The base jurisdiction collects the full license registration fee and distributes a portion of it to the other jurisdictions based on the percentage of miles the carrier has traveled in each jurisdiction. Registration fees for new fleets with no prior mileage to report are based on an Average Per Vehicle Distance chart available at the IRP office. The base jurisdiction also issues a license plate showing the word "apportioned" and a cab card showing the weights for which the carrier has paid fees in all IRP member jurisdictions.

The apportioned plate and the cab card are the only registration credentials needed to operate in member jurisdictions. The registration credentials allow the carrier to operate both intrastate and interstate in all IRP jurisdictions.


The fees you pay for your base apportioned plate and cab card are only the license plate and registration fees due for the jurisdictions that you reported miles traveled in. All IRP jurisdictions are automatically printed on your cab card to simplify the registration process and provide flexibility for registrants.

Fees paid to the IRP do not include the following:

  • Motor fuel taxes or fuel permit fees.
  • Permits to exceed the maximum length, width, height, or axle limitations.
  • Any operating authority required by any state or province.
  • Registration or license fees due states or provinces that are not IRP members.
  • Any special permits that are required by individual states.

 Addresses and telephone numbers of IRP jurisdictions for permits or operating authority can be found in Appendix F of the IRP manual. 


You must obtain apportioned registrations for your power unit(s) if you operate in Michigan and any other IRP jurisdiction, AND the vehicle:

  • Is a power unit having two axles and a gross vehicle weight or registered gross vehicle weight in excess of 26,000 pounds; or
  • Is a power unit having three or more axles, regardless of weight; or
  • Is used in combination, when the weight of such combination exceeds 26,000 pounds gross vehicle weight.

Vehicles, or combinations thereof, having a gross vehicle weight of 26,000 pounds or less and two-axle vehicles and buses used in transportation of chartered parties may be proportionally registered at the option of the registrant.

In Michigan and most other jurisdictions, power units are the only vehicles that must have apportioned registrations. 


These vehicles do not need an apportioned registration:

1. Government-owned vehicles.
2. City pick-up and delivery vehicles.
3. Recreational vehicles.
4. Vehicles displaying a restricted plate that is recognized under other reciprocity agreements.


Following is an example of how the registration for a Michigan-based power unit might be apportioned:

The operator of this unit drives in Michigan, Indiana, Illinois, and Wisconsin and drives 25,000 miles per year in each jurisdiction, for a total annual mileage of 100,000. The operator chose the gross vehicle weight of 80,000 pounds for each state. Under the International Registration Plan, the license fee would be computed as follows:


Mileage in State

Percent of Total


Full Year Fees of That State*


Apportioned Fee












































*Fees vary from state to state based on that particular state's laws and statutes governing the commercial vehicle rates.

For further IRP information please see our Michigan IRP Manual. To contact one of our representatives you may write or call the IRP office at:

Michigan Department of State
IRP Unit
7064 Crowner Drive
Lansing, MI 48918
Phone 517-335-6119
Fax 517-335-6116


Office Hours
Monday - 8:00 a.m. to 4:45 p.m.
Tuesday - 8:00 a.m. to 4:45 p.m.
Wednesday - 9:30 a.m. to 4:45 p.m.
Thursday - 8:00 a.m. to 4:45 p.m. 
Friday - 8:00 a.m. to 4:45 p.m.

During inclement weather, please check for updates regarding office closures.

Same-day service is available for most transactions received by 3:00 p.m., with the following exceptions:

  • Applications containing a large number of vehicles may not receive same-day service.
  • Due to large numbers of customers, same-day service for walk-in customers may not be available during the renewal periods. This usually includes from one week before to one week after the quarterly expiration dates. 
  • Same-day service may not be possible if all required documents are not submitted at the time of arrival.

Related Documents
Registration Manual PDF icon