# Who Needs IRP? Apportioned Registration Requirements and How to Apply

IRP applies to vehicles over 26,000 pounds or with three or more axles that operate in two or more member jurisdictions. Here's who is in, who is exempt, what the base jurisdiction needs to see, and how the application actually goes.

Source: https://www.highpointgps.com/resources/who-needs-irp-registration-requirements
By Israel Margulies, CEO & Founder — published 2026-09-18, updated 2026-09-18

## The Two-Part Test

A vehicle needs apportioned registration when it meets both halves of the IRP definition. First, it is an apportionable vehicle: a power unit with a gross or registered weight over 26,000 pounds (11,793 kg), or with three or more axles regardless of weight, or used in a combination whose combined weight exceeds 26,000 pounds. Second, it operates in two or more IRP member jurisdictions — the 48 contiguous US states, the District of Columbia and the ten Canadian provinces.

Both halves matter. A 40,000-pound truck that never leaves Quebec registers with the SAAQ the ordinary way. A pickup that crosses into Vermont daily is under the weight and axle thresholds and does not apportion. A tandem straight truck at 24,000 pounds that runs Ontario–Michigan is over the axle threshold and does, even though it is under the weight one.

## Who Is Exempt

The Plan carves out recreational vehicles, vehicles displaying restricted plates such as farm or dealer plates, government-owned vehicles, city pickup-and-delivery vehicles operating only within a defined commercial zone, and buses used exclusively for chartered parties. Trailers are not registered under IRP at all: they take an ordinary plate from the base jurisdiction and travel on the power unit's apportioned credential. A carrier below the thresholds that occasionally runs interjurisdictionally can buy a trip permit for each trip instead of apportioning, which is cheaper for one or two trips a year and more expensive for anything regular.

## What the Base Jurisdiction Asks For

The base jurisdiction is where the fleet has an established place of business, where its distance is accrued and where its operational records are kept. To apply, the carrier shows proof of that establishment — a business address, phone listing, tax filings or similar — plus a USDOT number and, for US operations, proof of paid federal heavy vehicle use tax for vehicles at 55,000 pounds and over. Each vehicle needs its title or ownership document, the desired registered weight for each jurisdiction, and a distance schedule.

The distance schedule is where most first-time applicants stall. It asks for actual distance in every jurisdiction over the July 1 to June 30 reporting period. A new fleet with no history uses the base jurisdiction's average per-vehicle distance table; an established fleet reports its own, and those numbers become the audit trail for the next three years. A fleet already running telematics produces the schedule as a distance-by-jurisdiction report; a fleet without it reconstructs from trip sheets and hopes.

## After the Plate Arrives

The carrier receives an apportioned plate and a cab card for each vehicle, valid for a twelve-month registration year set by the base jurisdiction. The cab card rides in the vehicle. Adding a unit mid-year means a supplemental application and a prorated fee; replacing one means transferring the credential. The renewal comes around annually with a fresh distance schedule, and it is the moment the fleet's IFTA standing is checked — a carrier with unfiled quarters can have its renewal held until they are cleared.

The compliance stack for an interjurisdictional truck is IRP plate, IFTA decals and licence, USDOT and operating authority, and an ELD, all reading the same odometer. Fleets that set them up from one telematics dataset spend the renewal week running reports, not rebuilding the year.

## FAQ

### Who needs IRP registration?

Any power unit over 26,000 pounds gross or registered weight, or with three or more axles, or in a combination over 26,000 pounds, that operates in two or more member jurisdictions.

### Does a truck that stays in one province or state need IRP?

No. IRP is for interjurisdictional operation. A vehicle that never leaves its base jurisdiction registers the ordinary way.

### Do trailers need apportioned plates?

No. Trailers take an ordinary plate from the base jurisdiction and travel on the power unit's apportioned registration.

### Can I use trip permits instead of IRP?

Yes, for occasional trips. A trip permit covers one entry into one jurisdiction; for regular interjurisdictional operation, apportioning is cheaper.

### What is a base jurisdiction for IRP?

The province or state where the fleet has an established place of business, accrues distance and keeps its operational records. That is where the carrier applies and where fees are paid.

## Sources

- [IRP, Inc.: The Plan](https://www.irponline.org/)
- [SAAQ: International Registration Plan (IRP)](https://saaq.gouv.qc.ca/en/vehicle-registration/heavy-vehicles/international-registration-plan-irp)
- [FMCSA: Apportioned Registration](https://www.fmcsa.dot.gov/registration/international-registration-plan)