How to Register for IRP in Washington State

Feb. 18, 2026, 9:17 p.m.
For motor carriers operating in Washington and traveling interstate, proper IRP (International Registration Plan) registration is essential. This guide explains the registration process, how to obtain apportioned plates, and key compliance requirements.
How to Register for IRP in Washington State

What Is IRP?

The International Registration Plan (IRP) is an agreement among U.S. states and Canadian provinces that allows commercial vehicles to operate across multiple jurisdictions with one set of apportioned license plates.

  • Registration fees are proportional to the miles traveled in each jurisdiction

  • Vehicles over 26,000 pounds GVW or combinations used in interstate commerce are subject to IRP

 Who Needs IRP Registration in Washington?

Carriers must register under IRP if they operate:

  • Commercial vehicles over 26,000 pounds GVW

  • Trucks, tractors, or combination vehicles used in interstate commerce

  • Fleets operating across two or more IRP member jurisdictions

Exemptions:

  • Vehicles under 26,000 pounds

  • Recreational vehicles and certain government vehicles

 Step-by-Step Registration Process

1. Prepare Required Information

Gather the following before applying:

  • USDOT number

  • Legal business name and EIN

  • Vehicle information (VIN, weight, make, model)

  • Estimated miles in each IRP jurisdiction

  • Insurance and IFTA credentials

2. Complete the IRP Application

3. Calculate Apportioned Fees

  • Fees are based on vehicle weight, fleet size, and jurisdictional mileage

  • Washington DOL calculates proportional fees for all IRP jurisdictions where you will operate

4. Receive Apportioned Plates

Once approved:

  • Carriers receive apportioned license plates valid in all IRP member jurisdictions

  • Plates must be displayed on all registered vehicles in the fleet

 Renewal & Reporting

  • IRP registration is annual

  • Update mileage and fleet info each year to stay compliant

  • Timely renewal avoids penalties and ensures uninterrupted interstate travel

 Compliance Tips for Washington Carriers

  • Keep accurate mileage logs for each vehicle

  • Ensure IFTA and IRP records align

  • Update vehicle additions, deletions, and weight changes promptly

  • Maintain insurance and USDOT compliance at all times

 Common Mistakes to Avoid

  • Misreporting vehicle weight or fleet mileage

  • Forgetting to include all jurisdictions where miles are traveled

  • Late renewal or missing deadlines

  • Operating without displaying apportioned plates

 Resources & Contacts

Washington State Department of Licensing – Motor Carrier Services

 

How to Register for IRP in Washington State

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