HaulBrief

IRP Apportioned Plates: Who Needs Them, and How the Fee Is Built

One plate, one cab card, 59 jurisdictions. The International Registration Plan is the least confusing of the interstate systems once you see what it is actually doing — splitting a single registration fee among the places you drove.

Last reviewed: September 11, 2026 Reading time: 8 min

What the IRP actually is

Before the International Registration Plan existed, a truck crossing state lines either bought a registration in every state it entered or bought trip permits at the border. The IRP replaced that with a single registration, issued by one jurisdiction, that is recognised everywhere — and then splits the money you paid among the jurisdictions you actually drove in.

Membership covers the 48 contiguous states, the District of Columbia and ten Canadian provinces: 59 jurisdictions in total. You register once, in your base jurisdiction. You get one apportioned plate for the vehicle and one cab card that lists every jurisdiction your registration is good for and the weight you are registered at in each.

IRP is registration. IFTA is fuel tax. They are separate systems with separate filings, separate accounts and separate audits, and they both key off the same thing: the miles you ran in each jurisdiction. That is why the two are always discussed together and why one set of mileage records feeds both. IFTA is explained separately here.

Which vehicles have to be apportioned

The term the Plan uses is apportionable vehicle. A power unit is apportionable when it is used to transport persons for hire or designed and used to transport property, it travels in two or more member jurisdictions, and it meets any one of these:

  • It has a gross or registered gross weight over 26,000 pounds; or
  • It has three or more axles on the power unit, regardless of weight; or
  • It is used in a combination whose gross weight exceeds 26,000 pounds.

Read the second one twice. A three-axle straight truck is apportionable at any weight. That catches vehicles people assume are too small to be involved — a tandem-axle dump body, for instance.

If you are under 26,000 pounds with two axles and do not run in combination over that weight, you are not required to apportion. Most jurisdictions still let you elect to, and there are situations where that is the easier answer than buying trip permits all year.

Trailers are not apportioned under the IRP. They are registered separately under whatever your base jurisdiction requires, which is usually a cheap plate or a permanent one.

How the fee is calculated

This is the part worth understanding, because it explains the invoice.

Your base jurisdiction works out, for each member jurisdiction, what a full-year registration for that vehicle at your declared weight would cost there. It then multiplies that figure by the share of your total fleet distance that was driven in that jurisdiction. Add up the 59 results and that is your bill.

So a truck that ran 60 percent of its miles in Texas and 40 percent in Oklahoma pays 60 percent of a Texas registration plus 40 percent of an Oklahoma one. The plate is valid in all 59 regardless.

Two consequences follow, and both surprise people:

  • Your declared weight matters more than your actual weight. Registration fees in most jurisdictions rise steeply with declared gross weight. Registering at 80,000 pounds when you never load above 60,000 is a real, recurring cost.
  • Where you drive changes what you pay. Jurisdictions charge very different amounts for the same registration. A change in your lanes changes your renewal bill a year later.

The mileage year, and your first year

The distance used is not the current year. It is the mileage from a defined reporting period that closed before your registration year began — so the fee you pay now is built from where you drove last year.

Under the Full Reciprocity Plan, which every member jurisdiction now operates, the fee is based only on jurisdictions where travel actually occurred. You no longer estimate distance in jurisdictions you might enter, and you no longer have to add jurisdictions to your cab card mid-year to go there. The cab card covers all 59 from day one.

A brand new carrier has no mileage history. Jurisdictions handle that with an average per-vehicle distance chart — a published table of assumed miles used for first-year registrants. You pay against that table in year one, and against your own records from year two. Which means your second-year renewal can look very different from your first, in either direction.

What your base jurisdiction has to be

You cannot pick the cheapest state. A base jurisdiction has to be a place where you have an established place of business — a physical location, open during normal business hours, staffed by someone employed by you — or where you actually reside, and where your operational records are maintained or can be made available. Jurisdictions ask for documentary proof; Florida, for example, asks for three separate forms of it.

The reason the rules are tight is that the base jurisdiction collects money on behalf of 58 others and audits you on their behalf. A carrier shopping for a cheap base is a carrier shopping for a lax auditor, and the Plan is built to prevent exactly that.

Records, and the audit that eventually comes

The individual vehicle distance record is the foundation of the whole system. For every trip you need the dates, the origin and destination, the route, the odometer readings, the total distance, and the distance by jurisdiction, tied to a specific vehicle and driver.

Your base jurisdiction audits a sample of IRP registrants. If your records do not support your reported distances, the auditor may reassess your fees using their own figures, and the reassessment will not be in your favour. Electronic logging devices and GPS records satisfy this comfortably; a shoebox of fuel receipts does not.

The same records serve IFTA. If you are already keeping jurisdiction-by-jurisdiction distance for your quarterly fuel tax return, you are already keeping most of what an IRP audit wants. Keeping two different sets is the mistake — keep one, properly.

What it costs, and why nobody can tell you

There is no national IRP fee. The amount depends on your declared weight, your vehicle, the mix of jurisdictions in your distance report, and each of those jurisdictions' own fee schedules, all of which they set independently. Any figure quoted as "the average IRP cost" is an estimate someone made up.

The honest answer is that your base jurisdiction's motor carrier services office will quote you before you commit, and that quote is the only number worth planning against. Ask for it at your declared weight and at one step lower; the difference is often larger than people expect.

Trip permits, and when they are the better answer

If you only leave your home jurisdiction occasionally, a temporary trip permit bought for each crossing may cost less than apportioning. There is no clean threshold — it depends on the permit price in the jurisdictions involved and how many trips you make. Work it out both ways before you register.

Where this breaks down is unpredictability. Trip permits have to be bought before you enter, and a permit bought at a port of entry at two in the morning is both more expensive and a delay. Carriers who start out permitting usually end up apportioning within a year, not because of the arithmetic but because of the friction.

Related reading

Sources

  1. International Registration Plan — Florida Department of Highway Safety and Motor Vehicles, for member jurisdictions, apportionable vehicle criteria and cab card requirements.
  2. Apportioned Registration Program — Pennsylvania Department of Transportation, for the Full Reciprocity Plan and first-year average distance charts.
  3. International Registration Plan, Inc. — the organisation that maintains the Plan.

General information, not legal advice. Regulations change; confirm current requirements with the agency before acting.