Who this is for: carrier, owner-operator
What Is IRP? The International Registration Plan Explained
The International Registration Plan (IRP) is a registration reciprocity agreement among US states and Canadian provinces. It allows commercial motor vehicles operating in multiple jurisdictions to register once in their base state and pay proportional registration fees to each jurisdiction based on the percentage of total miles traveled there.
Important Notice
IRP registration is administered through each state's Department of Transportation or Motor Vehicle division. Contact your base state's IRP office for registration instructions, fee schedules, and renewal procedures.
What IRP is and why it exists
The International Registration Plan is an agreement among 48 US states (excluding Alaska and Hawaii), the District of Columbia, and 10 Canadian provinces. Before IRP, a carrier operating a CMV across state lines was required to register the vehicle in every state it operated in — a burden that required multiple registration fees, separate applications, and plates or stickers for each state. IRP replaced that with a single apportioned registration: one plate, one cab card, and fees distributed proportionally to member jurisdictions based on the percentage of total miles operated in each. A carrier that drives 40% of its miles in Texas contributes 40% of its applicable Texas registration fee through IRP — not 100% as if the truck were based there.
Which vehicles require apportioned IRP registration
IRP registration is required for commercial vehicles that: have two axles and a gross vehicle weight or registered gross vehicle weight exceeding 26,000 lbs; have three or more axles regardless of weight; or are used in combination when the combination exceeds 26,000 lbs GVWR. The vehicle must also operate in interstate commerce across two or more IRP member jurisdictions. Vehicles operating solely within one state use that state's standard registration rather than IRP. Recreational vehicles, government vehicles, and farm vehicles within 150 miles of the farm are typically exempt from IRP registration requirements.
How IRP fees are calculated
IRP fees are apportioned based on the percentage of total fleet miles traveled in each jurisdiction during the prior registration year. A carrier that drove 30% of its annual miles in Texas contributes 30% of the applicable Texas registration fee toward its IRP total. For carriers without prior-year mileage data — new carriers or first-time IRP registrants — each jurisdiction applies an estimated mileage calculation based on planned routes and expected operations. Total annual IRP fees vary considerably depending on the states operated in, the registered gross vehicle weight (higher RGVW means higher fees per jurisdiction), and actual mileage distribution. Carriers who operate mostly in high-fee states will pay more than those concentrated in lower-fee jurisdictions.
IRP cab card and plates
IRP registration produces apportioned license plates — typically one set per vehicle — and a cab card listing all member jurisdictions in which the vehicle is authorized to operate. The cab card must be kept inside the vehicle at all times and presented to enforcement officers on request. The cab card is evidence of valid registration across all listed jurisdictions; operating in a state not listed on the cab card requires a trip permit for that state. If the cab card is lost or damaged, contact the base state's IRP office immediately for a replacement — enforcement officers will not accept a verbal explanation of a lost card during a weigh station stop.
Annual IRP renewal
IRP registrations renew annually, typically before the registration year expiration date that varies by base state. The renewal fee uses actual mileage from the prior registration year — which means the cost can shift year to year based on where you drove. Carriers who added new states to their operations will see those jurisdictions added to the renewal fee calculation. Most base states have online IRP renewal portals, and some combine IRP and IFTA renewals in a single platform. The renewal package includes updated plates or sticker renewals (depending on the state) and a new cab card. Operate with the renewed cab card in the vehicle from the start of the new registration year — an expired cab card is a registration violation even if the payment has been submitted.
Adding a vehicle to your IRP account mid-year
When a new truck is purchased during the IRP registration year, it must be added to the existing IRP account before operating it interstate. Contact the base state's IRP office with the new vehicle's VIN, make, model, year, and registered gross vehicle weight, along with your existing IRP account number. The base state issues a supplemental cab card and calculates a pro-rated fee for the remaining months in the registration year. In most states this can be completed online within one or two business days. Operating the new vehicle interstate before receiving the cab card is an unregistered operation violation, regardless of the fact that the other trucks in the fleet are properly registered.
Frequently Asked Questions
Is IFTA the same as IRP?
No. IFTA covers fuel tax reporting; IRP covers vehicle registration fees. Both apply to similar vehicles and jurisdictions, and both use a base state designation — but they are entirely separate programs with separate licenses, separate filings, and separate fees. Most interstate carriers need both.
What is a trip permit and when is one needed?
A trip permit is a single-trip authorization to operate in a jurisdiction not covered by an IRP registration. Trip permits are used when a carrier has no IRP registration, or when traveling into a jurisdiction not listed on the cab card. Most are purchased online through the state DOT or a permit service. They are typically valid for one trip or a limited number of days and cost more per-crossing than annual IRP registration.
What happens at a weigh station if the IRP cab card is expired?
An expired IRP cab card is an unregistered vehicle violation. The officer may place the vehicle out of service until valid registration is produced, and will issue a citation. Some states have brief grace periods for renewals in process, but operating past the expiration date without documentation of a pending renewal is risky. Renew at least 30 days before expiration to avoid this situation.
Do all vehicles in a fleet need to share the same base state?
Yes. IRP requires all apportioned vehicles in a fleet to share the same base jurisdiction. You cannot split a fleet across multiple base states unless different operating divisions legitimately meet the criteria for different states — which typically requires genuinely separate business entities with distinct operational centers.
What if I enter a state not listed on my IRP cab card?
Operating in a jurisdiction not listed on the cab card means the vehicle is not registered to operate there under IRP. Purchase a trip permit for that state before or immediately upon entry. Some states offer online trip permits; others require advance purchase through a permit service. Buying ahead is simpler and usually cheaper than being caught at a scale house without one.