If you run trucks across state lines, two acronyms quietly govern a big chunk of your paperwork: IFTA and IRP. They’re often confused because both are mileage-based, multi-jurisdiction programs — but they do different jobs, and both can trigger an audit if your records are sloppy. Here’s a clear breakdown of each, who they apply to, and how to stay clean.
Key takeaway: IFTA is about fuel tax. IRP is about registration (plates). Both are calculated from the miles you run in each jurisdiction, which is why accurate, contemporaneous distance and fuel records are everything.
IFTA: the International Fuel Tax Agreement
IFTA simplifies fuel-use tax reporting for carriers operating in more than one member jurisdiction (the lower 48 U.S. states and 10 Canadian provinces). Instead of filing fuel taxes separately with every state you drive through, you file one quarterly return with your base jurisdiction, which redistributes the tax. Your base jurisdiction issues an IFTA license and decals for your vehicles. The authority on the agreement is IFTA, Inc..
Which vehicles qualify (a “qualified motor vehicle”)
Generally, a vehicle used to transport persons or property that:
- has two axles and a gross/registered weight over 26,000 lbs, or
- has three or more axles regardless of weight, or
- is used in a combination over 26,000 lbs.
(Recreational vehicles are typically excluded.)
What IFTA requires of you
- Display your IFTA license/decals.
- File quarterly returns reporting miles traveled and fuel purchased in each jurisdiction.
- Keep supporting records — IFTA records are generally retained for four years.
IRP: the International Registration Plan
IRP is apportioned vehicle registration. Rather than buying a separate plate in every state you operate in, you register through your base jurisdiction and pay registration fees apportioned by the percentage of distance you travel in each member jurisdiction. You get one apportioned plate and a cab card listing the jurisdictions. The governing body is IRP, Inc..
Which vehicles qualify
Apportionable vehicles are those used to transport persons for hire or property and meeting the same general thresholds (over 26,000 lbs, three or more axles, or used in a combination over 26,000 lbs) that operate in two or more member jurisdictions.
What IRP requires of you
- Register and carry the apportioned cab card in the vehicle.
- Report actual distance per jurisdiction (renewals use a reporting period).
- Keep distance records — IRP audits typically review the current plus several preceding years of mileage data.
IFTA vs. IRP at a glance
| IFTA | IRP | |
|---|---|---|
| Purpose | Fuel-use tax | Apportioned registration (plates) |
| Based on | Miles + fuel per jurisdiction | Miles per jurisdiction |
| You get | License + decals | Apportioned plate + cab card |
| Filing | Quarterly returns | Annual renewal |
| Records | ~4 years | Current + preceding years |
| Authority | IFTA, Inc. | IRP, Inc. |
The records that make or break an audit
Both programs are audited by your base jurisdiction, and both audits come down to the same thing: can you prove your miles? That means complete, trip-level distance records (date, route, jurisdiction-by-jurisdiction miles) and every fuel receipt. Gaps get estimated against you — usually unfavorably. ELD/GPS trip data plus organized fuel records are your best defense.
A quick note: IFTA and IRP are administered by member states/jurisdictions, not the FMCSA. Confirm specifics with your base jurisdiction’s DMV or motor carrier office.
How Fleetive helps
Fleetive keeps the documentation side of IFTA and IRP organized so an audit isn’t a scramble: store apportioned cab cards, IFTA licenses, and fuel and registration documents in structured, audit-ready folders tied to each unit in your fleet workspace, with renewal and expiration reminders so plates and decals never lapse.
Keep your interstate paperwork audit-ready year-round. Get started in 15 minutes or start a free trial.
Note: This article is for general informational purposes and reflects regulations as of its publish date. It is not legal advice. Always confirm current requirements with the FMCSA and the eCFR, or your compliance counsel.
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