IRP vs IFTA Explained: What They Are and How They Differ

IRP is your license plate, IFTA is your fuel tax license. The International Registration Plan lets you run 48 states with one apportioned plate from your base state, and the International Fuel Tax Agreement lets you file one quarterly fuel tax return instead of one per state. Run interstate and you need both.

IRP: one plate, every state

You register once, in your base state, and the plate on your truck is legal in every member jurisdiction across the U.S. and Canada.

Behind the plate, your registration fees get apportioned, split up, based on the miles you run in each state. Run 60% of your miles in Texas and 40% in Oklahoma, and roughly 60% of your fee goes to Texas, 40% to Oklahoma. Your first year is billed on estimated miles, since you have no history yet.

A new IRP registration typically costs somewhere in the $1,500 to $2,500 range, depending on your base state and your truck's registered weight.

IFTA: one fuel tax return, four times a year

IFTA does for fuel taxes what IRP does for plates. You hold one fuel tax license from your base state and file one quarterly return that covers every member jurisdiction you ran in.

The math works like this. You report miles run and gallons bought in each state. Your base state does the accounting: burned more fuel than you bought in a state, you owe that state. Bought more than you burned, you get a credit. One return, four deadlines a year.

Mark all four now. Late filings draw penalties and interest.

Who needs them

Both apply to qualifying commercial vehicles running interstate: generally over 26,000 lbs GVWR or with three or more axles. Running a semi across state lines? Assume you need both.

One more thing new carriers miss: Oregon, New Mexico, and Kentucky charge separate weight-distance taxes on top of IRP and IFTA. Factor them into your startup budget if you will run those states.

Getting set up, in order

1. Pick your base state. It's where the vehicle is registered and where you have an established place of business.
2. Apply for IRP registration through your base state's IRP office. You'll get your apportioned plate and cab card.
3. Apply for your IFTA license through the same base state. You'll get the license and decals for your trucks.
4. Set up recordkeeping before your first load. Pull ELD mileage by state and keep every fuel receipt centralized.

Processing takes time, so don't leave this for the week you plan to start running. For a realistic timeline, see how long MC authority takes.

Takeaway: Plates are IRP, fuel tax is IFTA, both run through your base state. Get credentialed before your first load and set up clean records on day one.

Rookie mistakes to avoid

• Forgetting IFTA exists until the first deadline passes. Mark all four quarters now.
• Sloppy mileage records. Reconcile ELD data monthly, not quarterly.
• Skipping zero-mile quarters. File every quarter, even when the truck sat.
• Missing the extra state taxes. Oregon, New Mexico, and Kentucky bill weight-distance separately.

If you are still early in the process, start with what MC authority is to see where IRP and IFTA fit in the startup sequence.

Sources

• IFTA, Inc.
• IRP, Inc.
• FMCSA Registration