IRP Registration: The Complete Guide for Fleet Operators | Montana Registration Services

What Is the International Registration Plan?

The International Registration Plan is a reciprocity agreement between US states, Washington D.C., and Canadian provinces. It exists to solve a practical problem: commercial vehicles cross state lines constantly, but each state historically wanted its own registration fee. IRP consolidates that into a single registration administered through your base state.

Under IRP, a carrier registers its qualified vehicles in one base state. That state collects the full registration fee, then distributes apportioned shares to every other jurisdiction the carrier operated in during the prior year. The carrier gets a cab card listing every IRP jurisdiction and a single apportioned license plate for the vehicle.

The plan is governed by the IRP, Inc. organization, a nonprofit that maintains the agreement between member jurisdictions. As of 2024, every state except Alaska and Hawaii participates, along with the District of Columbia and 10 Canadian provinces.

For fleet operators, IRP registration is not optional if you run qualifying vehicles across state lines. Operating without apportioned registration exposes you to citation, fine, and potential vehicle impoundment at any weigh station or port of entry.

Who Qualifies for IRP Registration?

IRP registration applies to commercial vehicles that meet at least one of these criteria:

• Gross vehicle weight or registered gross vehicle weight exceeding 26,000 lbs
• Three or more axles, regardless of weight
• A combination (truck plus trailer) with a combined gross vehicle weight exceeding 26,000 lbs

If your vehicle crosses into at least one jurisdiction outside your base state in the normal course of business, IRP registration is required. Purely intrastate carriers operating only within one state are not subject to IRP, though many states have their own apportionment rules for intrastate commercial vehicles.

Vehicle types that commonly require IRP registration include:

• Semi-trucks and tractor-trailers
• Heavy-duty dump trucks crossing state lines
• Flatbed and step-deck carriers
• Tanker trucks
• Livestock haulers
• Refrigerated freight carriers
• RV transport carriers (when used commercially)
• Bus fleets operating across state lines

Certain vehicles are exempt from IRP even if they cross state lines. These typically include government vehicles, vehicles operated under a temporary permit, recreational vehicles used solely for personal use, and vehicles with farm registration in some jurisdictions. Exemptions vary by state; confirm your specific situation with a registration compliance professional before assuming an exemption applies.

How Apportioned Plates Work

The core mechanic of IRP is apportionment: your total registration fee is divided among jurisdictions in proportion to the miles your fleet actually operated in each one.

Here is how the calculation works in practice. At registration or renewal, you report the total miles your fleet traveled in each IRP jurisdiction during the prior year (called the “mileage year”). Each jurisdiction calculates its share of your total fleet mileage as a percentage. You pay that percentage of that jurisdiction’s full registration fee for each vehicle. The base state collects everything and distributes funds accordingly.

For a new operation with no prior-year mileage, most jurisdictions use an “estimated mileage” or “full fee” method. New carriers typically pay full fees to every jurisdiction they plan to operate in during the first year, then true up at renewal based on actual miles.

The apportioned plate itself looks like a standard commercial plate but includes an “APP” designation in many states. The cab card that comes with it is the critical document: it lists every jurisdiction the vehicle is registered in and must be carried in the vehicle at all times. Weigh station officers check the cab card to verify registration compliance.

Losing a cab card is a compliance problem, not just an inconvenience. Most states treat operating without a cab card the same as operating unregistered. Keep originals in the vehicle and maintain electronic copies.

Selecting Your Base State

Your base state is the state where your fleet is based, meaning where it maintains its principal place of business, where vehicles are dispatched from, where records are kept, and where the fleet owner or lessee is domiciled. Base state is not a choice you make freely; it has defined criteria.

The IRP Agreement defines “established place of business” as a physical location in the base state where the registrant maintains records, has employees, and from which vehicles are dispatched. PO boxes and registered agent addresses alone do not qualify as an established place of business for base state purposes.

Key factors in base state compliance:

• Physical presence: An actual office, terminal, or business location in the state
• Record keeping: Operational records must be accessible from the base state
• Operational control: Vehicles are normally dispatched from or return to the base state
• Personnel: Employees or agents conducting business on behalf of the carrier in the state

Base state selection matters financially. Registration fees, weight-mile taxes, and fuel tax structures vary significantly between states. Carriers with flexibility in where they establish operations sometimes evaluate multiple states before committing. Montana is one state that attracts fleet registration interest for specific structural reasons covered in the next section.

Montana as an IRP Base State: What Fleet Operators Need to Know

Montana has no sales tax and no vehicle property tax. For commercial fleet operators purchasing vehicles, this eliminates two significant cost categories that other states impose. A semi-truck with a $150,000 valuation can trigger $10,000 or more in sales tax in states that assess it on commercial vehicle purchases. Montana charges none.

Montana’s weight-mile tax structure is competitive for many carrier profiles. The state uses a ton-mile tax system for qualifying vehicles, but the rates and caps are structured differently than states like Oregon, which has one of the most aggressive weight-mile tax regimes in the country.

For carriers operating a Montana LLC and basing their fleet there, the combination of no sales tax, no property tax on vehicles, and competitive registration fees creates a meaningful cost advantage. This is particularly relevant for high-value vehicles: exotic cars, specialty trailers, and commercial trucks where acquisition costs are high.

Montana LLCs used for vehicle registration must be legitimate business entities with actual operations or operational intent. The LLC must have a registered agent in Montana, maintain required filings with the Montana Secretary of State, and the carrier must be able to demonstrate an established place of business in the state to use it as an IRP base state. Montana Registration Services handles all of this as part of the fleet registration process.

It is important to be clear: using a Montana LLC purely as a mail address with no genuine business presence does not satisfy IRP base state requirements. MRS works with carriers to establish compliant Montana business presence, not paper addresses.

How Montana Registration Services Handles IRP Filing

Montana Registration Services is a privately owned registration compliance company based in Lutz, Florida. MRS is not a government office, not affiliated with the Montana DMV, and not part of any state agency. MRS is an authorized processing agent that files on behalf of vehicle owners and fleet operators with Montana’s Motor Vehicle Division and manages the carrier compliance process from application through cab card delivery.

MRS processes IRP registrations under a contract with the state of Montana (DOJ contract JUS24-0232GU-D, Amendment 2). This contract designates MRS as an authorized processor for Montana vehicle registration transactions. It is the same processing infrastructure that competitor services use when they file through Montana: they route through a processor like MRS because they do not hold direct processing agreements with the state. MRS is the processor, not a middleman going through one.

What that means for your fleet: when you file through MRS, your registration moves through a direct processing channel. There is no additional intermediary layer adding time or fees between your application and the state’s Motor Vehicle Division.

The MRS fleet registration process covers:

• Montana LLC formation and registered agent services (if needed for base state establishment)
• USDOT number verification and carrier filing
• IRP account setup with Montana Motor Vehicle Division
• Apportioned plate procurement and cab card generation
• Annual renewal management across all fleet vehicles
• Mileage reporting assistance at renewal
• Supplemental fleet additions when you add vehicles mid-year
• Replacement cab cards for lost or damaged documents

Fleet accounts receive dedicated account management. Rather than submitting each vehicle as a standalone order, fleet operators work with an assigned MRS account manager who tracks the full fleet registration calendar, anticipates renewal deadlines, and coordinates multi-vehicle filings to minimize administrative overhead on the carrier side.

How to Start Your IRP Registration with Montana Registration Services

1. Gather your fleet data. You will need: vehicle identification numbers (VINs) for every vehicle, year/make/model, gross vehicle weight (GVW) or registered gross vehicle weight (RGVW) for each unit, a mileage breakdown by jurisdiction for the prior year (or estimated mileage for new operations), and your USDOT number if already issued.
2. Contact MRS for a fleet intake assessment. Fleet registrations are handled through direct account setup rather than the standard online order flow. An MRS account manager will review your carrier profile, confirm base state eligibility, and provide a fee estimate before you commit to anything.
3. Establish Montana business presence (if needed). For carriers using Montana as a base state, MRS handles LLC formation through the Montana Secretary of State and sets up a registered agent relationship. This typically completes within 3 to 5 business days.
4. Complete the IRP application. MRS prepares and submits your IRP application to the Montana Motor Vehicle Division. The application includes fleet schedules listing every vehicle, the mileage apportionment breakdown, and payment of calculated fees to each jurisdiction.
5. Receive apportioned plates and cab cards. Once the Motor Vehicle Division processes the application, MRS delivers apportioned plates and cab cards for each vehicle. Standard processing time through Montana is 10 to 15 business days. Expedited options are available for carriers with urgent compliance deadlines.
6. Load cab cards and go. Each driver must carry the cab card for their specific vehicle. MRS provides digital cab card copies for your records and physical originals for the vehicles. You are now compliant in every IRP jurisdiction listed on the cab card.

IRP and IFTA: Understanding the Combination

IRP handles registration and apportioned plates. IFTA, the International Fuel Tax Agreement, handles fuel tax reporting. The two programs run parallel and together cover the core compliance requirements for interstate commercial carriers.

Under IFTA, carriers report quarterly fuel consumption and miles traveled in each IFTA jurisdiction. The base state calculates net fuel taxes owed or refunded based on how much fuel was purchased in each jurisdiction versus how much tax was owed based on miles traveled there. Carriers who buy more fuel than they burn in high-tax states may receive net refunds; those who buy in low-tax states and operate heavily in high-tax states pay net amounts due.

IFTA credentials consist of an IFTA license (issued by the base state) and decals displayed on qualifying vehicles. Montana issues IFTA credentials and MRS handles IFTA enrollment as part of the fleet setup process alongside IRP registration.

Running IRP and IFTA together from a single base state simplifies record keeping significantly. All mileage records, fuel receipts, and quarterly filings go through one state’s motor carrier division rather than managing multiple state relationships.

Montana’s IFTA structure is straightforward, with competitive fuel tax rates compared to states like California, New York, and Pennsylvania. For fleets operating primarily in the western US and Canada, Montana’s positioning as a base state offers geographic logic as well as financial benefit.

Common IRP Registration Questions

Can I add vehicles to my IRP account mid-year?

Yes. IRP allows supplemental registration at any point during the registration year. Fees are prorated based on the number of months remaining in the registration year. MRS handles mid-year additions as part of ongoing fleet account management.

What happens if I operate in a jurisdiction not on my cab card?

Operating in a jurisdiction not covered by your current IRP registration is a compliance violation. At ports of entry and weigh stations, officers verify that the jurisdiction they are in appears on the cab card. If it does not, the carrier may be issued a trip permit at the officer’s discretion or cited for operating unregistered. MRS can update your cab card to add jurisdictions before you expand operations into new states.

How is the apportionment fee calculated for a new carrier with no prior mileage?

New carriers with no established mileage history use estimated mileage. Most jurisdictions accept carrier-provided estimates for the first year. At renewal, actual miles replace the estimates and fees are reconciled. MRS account managers help new carriers build reasonable mileage estimates based on operational plans.

Does IRP registration cover Canada?

Yes. The 10 Canadian provinces participating in IRP are: British Columbia, Alberta, Saskatchewan, Manitoba, Ontario, Quebec, New Brunswick, Nova Scotia, Prince Edward Island, and Newfoundland. If your Montana IRP registration includes Canadian provinces, you can operate in those provinces without separate registration.

What records do I need to keep for IRP compliance?

IRP requires carriers to maintain mileage records for each vehicle for the current registration year plus three prior years. Records must show total miles by vehicle and miles by jurisdiction. Acceptable documentation includes driver trip logs, GPS-generated mileage reports, and electronic logging device (ELD) records.

How long does IRP registration take through MRS?

Standard IRP processing through Montana runs 10 to 15 business days from complete application submission. New carriers who also need Montana LLC formation should add 3 to 5 business days for that step. MRS offers expedited processing for carriers with immediate compliance needs.

Is a Montana LLC required to use Montana as my IRP base state?

Not necessarily, but it is the most common structure for out-of-state carriers who want to use Montana as their base state. An LLC provides the legal business entity needed to demonstrate an established place of business in Montana. MRS evaluates each carrier’s situation during the intake process to determine the right structure.

Get Your Fleet IRP-Registered Through MRS

Montana Registration Services handles IRP registration for fleets of all sizes, from owner-operators with a single qualifying truck to carriers managing hundreds of units. As a direct-processing operation under contract with Montana’s Motor Vehicle Division, MRS moves applications through the state system without the delays and markups that come from indirect filing.

Fleet operators benefit from dedicated account management, prorated mid-year additions, annual renewal coordination, and IFTA enrollment as part of a single engagement. MRS does not require you to navigate state motor carrier offices or manage separate filings per jurisdiction. You file once. MRS handles the rest.

To start a fleet intake assessment, contact MRS directly. An account manager will review your carrier profile, confirm base state eligibility, and provide a complete fee estimate before any commitment.