IFTA vs IRP: Fuel Tax vs Apportioned Plates, Explained

Both are about running in multiple states, both are mileage-based, and both are filed through your base state — so carriers mix them up. They're different systems.

Quick answer

IFTA (International Fuel Tax Agreement) settles the fuel taxes you owe to each state based on miles driven and fuel bought there. IRP (International Registration Plan) is how you license and plate your truck across multiple states, with registration fees apportioned by miles per state. IFTA = fuel tax; IRP = registration.

Side by side

| | IFTA | IRP |

| --- | --- | --- |

| What it covers | Fuel taxes | Vehicle registration / plates |

| You get | An IFTA license + decals | An apportioned cab card + plate |

| Filed | Quarterly returns | Annual renewal |

| Based on | Miles + fuel per jurisdiction | Miles per jurisdiction |

| Through | Your base state | Your base state |

What they share

Both require you to track miles by state, both run through your base jurisdiction, and both apply to qualified vehicles operating interstate (generally 26,000+ lbs or 3+ axles). Good mileage records serve both.

What they don't share

• IFTA is a quarterly tax settlement — you may owe money or get a credit each quarter. You file even for zero-mile quarters.
• IRP is an annual registration — you renew once a year and get plates.
• Oregon is the oddball: it uses a weight-mile tax instead of IFTA fuel tax for these vehicles.

And neither is Form 2290 or UCR

IFTA and IRP are state-administered. Form 2290 (federal HVUT) and UCR are separate federal obligations. A typical interstate truck deals with all four.

Want the full picture for your operation? The free Compliance Check maps IFTA, IRP, 2290 and UCR for your trucks, and the AI assistant answers specifics.