The International Registration Plan (IRP) is a reciprocal vehicle registration agreement between all 48 contiguous US states, the District of Columbia, and 10 Canadian provinces. If you operate a commercial vehicle — including an auto transport carrier — across more than one IRP jurisdiction, you register once in your base jurisdiction and pay a single apportioned fee instead of buying separate plates in every state or province you enter. That one set of apportioned plates gives you legal operating authority everywhere covered by the agreement.
For auto haulers, IRP is not optional. Any power unit with a gross vehicle weight rating (GVWR) over 26,000 lbs, or a vehicle operated in combination where the combined GVWR exceeds 26,000 lbs, must be registered under IRP if it crosses a jurisdictional line. A typical 9-car open carrier running coast-to-coast or between Ontario and Michigan hits that threshold easily. Getting this wrong means roadside fines, out-of-service orders, and delayed loads — all of which cost far more than the registration fee itself.
How IRP Apportionment Works
IRP fees are not a flat rate. Each jurisdiction calculates its share based on the percentage of your total fleet miles driven in that jurisdiction during the prior year (called the "mileage percentage"). The formula looks like this:
| Step | What You Calculate |
|---|---|
| 1 | Total miles operated across all IRP jurisdictions in the preceding year |
| 2 | Miles in each individual jurisdiction |
| 3 | Mileage percentage per jurisdiction = (jurisdiction miles ÷ total miles) × 100 |
| 4 | Fee for that jurisdiction = full registration fee × mileage percentage |
| 5 | Sum all jurisdiction fees = your total IRP bill |
New entrants who have no mileage history use "estimated" miles. Most jurisdictions require you to report at least 10% of your total estimated mileage in your base jurisdiction, so you cannot artificially allocate zero miles to high-fee states to lower your bill.
Registration periods run 12 months. Renewal typically opens 90 days before your expiry date. If you add a vehicle mid-year, you pay a prorated fee for the remaining months in the registration period — not a full year.
Choosing Your Base Jurisdiction
Your base jurisdiction must be the state or province where your business is established, where your vehicles are controlled and maintained, and where mileage records are available for audit. You cannot pick a jurisdiction just because it has lower fees. The IRP agreement requires a genuine operational connection.
Practically speaking:
- US operators — Your base is typically the state where your company is incorporated or where you have a physical terminal. Texas, Florida, and Ohio are common bases for large carriers because of low per-vehicle fees, but you must actually operate there.
- Canadian operators — Ontario, Alberta, and British Columbia are the most common bases. Your base province must match where your carrier operates under a CVOR (Commercial Vehicle Operator's Registration) or NSC (National Safety Code) number. Cross-border carriers also need a US DOT number and FMCSA operating authority before pulling loads south of the border.
Audits happen. Every IRP jurisdiction has the right to audit your mileage records for the three prior registration years. Keep dispatch records, fuel receipts, GPS logs, and driver logs organized and accessible. If an audit finds you underreported miles in a high-fee jurisdiction, you will owe back fees plus interest — sometimes 20–30% on top of the original underpayment.
What IRP Does and Does Not Cover
IRP covers registration only. It does not replace:
- IFTA (International Fuel Tax Agreement) — A separate apportionment system for fuel taxes. Canadian operators should review the IFTA compliance guide for Canadian auto haulers for a full breakdown.
- Oversize/Overweight permits — If your loaded carrier exceeds standard axle weight or height limits in a given state or province, you still need a separate trip permit or annual OS/OW permit for that jurisdiction.
- Operating authority — US interstate carriers need MC authority from FMCSA. Canadian carriers hauling into the US need both a US DOT number and an MC number. IRP plates do not grant authority — they only grant registration.
- Unified Carrier Registration (UCR) — US-based carriers must also register annually under UCR. Fees are based on fleet size and range from roughly $70 for a single vehicle up to $40,000+ for large fleets.
- Cab cards — Each vehicle registered under IRP receives a cab card (paper or digital depending on your jurisdiction) listing all the jurisdictions you are registered in. Drivers must carry the cab card in the vehicle at all times. A missing or expired cab card is a roadside violation.
IRP for Cross-Border US–Canada Operations
Cross-border auto transport is where IRP compliance gets layered. If you are a Canadian carrier running into the US (or a US carrier picking up loads in Canada), here is the regulatory stack you need to have in order:
Canadian carriers operating into the US
- Valid CVOR or NSC certificate in your base province
- IRP apportioned plates from your base province, listing US states in your lane
- US DOT number (free, registered at FMCSA)
- FMCSA operating authority (MC number) — required for-hire carriers; US$300 application fee, takes 10–20 business days to activate
- IFTA account in your base province (for fuel tax reporting)
- Commercial vehicle insurance meeting both Canadian and US minimum limits (typically US$1,000,000 combined single limit for auto carriers)
- US Customs bond or C-TPAT enrollment if hauling vehicles across the border regularly
US carriers operating into Canada
- IRP apportioned plates from your US base state, listing the Canadian province(s) you enter
- Canadian provincial operating permit — some provinces (BC, Ontario) require a separate carrier registration or permit for foreign carriers; confirm with each province before your first run
- IFTA account in your base state already covers Canadian provinces — you report Canadian miles and fueling on the same IFTA return
- Canada Border Services Agency (CBSA) commercial importer number if your loads include vehicles being imported — separate from carrier registration
- CRA (Canada Revenue Agency) HST/GST considerations if you are billing Canadian customers regularly — get advice from a Canadian tax professional
IRP Renewal and Fleet Changes — Practical Checklist
Registration errors at renewal time are one of the leading causes of delayed IRP processing. Work through this checklist 60 days before your expiry date:
- Pull your actual mileage records for the prior 12-month period, broken down by jurisdiction. GPS telematics data is the cleanest source.
- Reconcile your mileage records against your fuel receipts and driver logs. Auditors compare all three.
- Confirm your fleet list is current — add any vehicles purchased during the year, remove any sold or totaled units.
- Verify your base jurisdiction address is still accurate. A change of address mid-year should be reported promptly; changing base jurisdictions requires a transfer process and may trigger a prorated true-up.
- Check that your insurance certificate on file with your base jurisdiction is not expiring before your new registration period ends.
- Confirm your IFTA account renewal (if applicable) aligns — IFTA and IRP renewals often run on the same cycle in many jurisdictions, but the applications are separate.
- Budget 2–4 weeks for processing time. Some jurisdictions are faster, but cross-border runners should not cut it close.
Cost Expectations
IRP fees vary widely by jurisdiction and vehicle weight class. As a rough reference: a typical Class 8 auto transport carrier running primarily in the Midwest or Ontario corridor might pay $2,500–$5,000 per truck per year in total apportioned fees. A carrier with heavy mileage in high-fee states like California or New York will pay more. New entrant estimates tend to run higher because base jurisdictions apply conservative default mileage figures.
The real cost of IRP is not the fee — it is the administrative burden. Tracking mileage by jurisdiction across a multi-truck fleet, preparing accurate renewal applications, and responding to audits takes hours that dispatchers and owner-operators do not have. Carriers who rely on spreadsheets to track mileage and compliance find that errors compound quickly: a miscalculated mileage percentage in year one becomes an audit liability in year three.
How Fleet Software Simplifies IRP Compliance
The mileage records that IRP auditors want are the same records your dispatch and accounting workflow already generates: trip logs, GPS traces, load assignments, and fuel stops. The problem is that most carriers keep these in separate places — a spreadsheet here, a TMS there, a paper logbook in the cab — and reconciling them at renewal time is a multi-day project.
AutoHauler AI centralizes trip data at the order level. Every load you dispatch records the pickup and delivery jurisdictions, which means your mileage-by-state report is always current, not something you reconstruct at renewal. The features built for fleet operators are designed around the compliance paper trail your carrier actually needs — not generic trucking workflows that do not fit auto transport.
If you are evaluating whether fleet software makes sense for your operation, this guide on choosing fleet management software for auto transport walks through what to look for before you commit to a platform. And if you have questions about how AutoHauler AI handles mileage tracking, jurisdictional reporting, or cross-border operations, check the FAQ or start a free trial and ask us directly — we work with carriers on both sides of the border and can walk you through exactly what your fleet needs.