Can You Do IFTA? Your Guide to the International Fuel Tax Agreement
· Trucking Compliance Service
If you are an owner-operator or a fleet manager hauling freight across state lines, there is one quarterly obligation that sits at the top of every compliance checklist: your IFTA fuel tax filing. The International Fuel Tax Agreement was designed to simplify how commercial motor carriers calculate and pay fuel taxes across multiple states and Canadian provinces. But simple on paper does not mean simple in practice.
Every quarter, thousands of truckers ask the same question: Can I do my own IFTA filing? The short answer is yes — but whether you should is a very different question.
What Is IFTA and Why Does It Exist?
Before IFTA, a commercial truck driver crossing multiple states had to purchase individual fuel permits at every state border. This was expensive, time-consuming, and a logistical nightmare for interstate carriers. IFTA replaced that system with a single license and a quarterly reporting process that consolidates all your fuel tax obligations into one return filed with your base jurisdiction.
Under IFTA, you track the miles you drive in each state and the fuel you purchase in each state. At the end of every quarter, you calculate how much fuel tax each state is owed based on the miles driven there, subtract what you already paid at the pump, and either send a check or receive a credit. Simple in theory. Complex in execution.
Who Is Required to Have an IFTA License?
You are required to register for IFTA if your commercial motor vehicle meets any of the following criteria:
- Has two axles and a gross vehicle weight or registered gross vehicle weight exceeding 26,000 pounds
- Has three or more axles regardless of weight
- Is used in combination when the weight of such combination exceeds 26,000 pounds gross vehicle weight
If your truck meets these criteria and you cross state lines for commercial purposes, you must have an active IFTA license and display IFTA decals on both sides of your cab. Operating without them is a violation that can result in fines and an Out-of-Service order at the scale house.
The Four IFTA Filing Deadlines You Cannot Miss
IFTA returns are due quarterly. Missing a deadline triggers immediate penalties, and the longer you wait, the more expensive it gets. Here are the four deadlines every carrier must know:
- Q1 (January – March): Due April 30
- Q2 (April – June): Due July 31
- Q3 (July – September): Due October 31
- Q4 (October – December): Due January 31
Even if you drove zero miles and purchased zero fuel during the quarter, you are still legally required to file a zero return. Failure to do so carries the same penalties as a missed regular filing.
What Records Do You Need to File IFTA Yourself?
Filing IFTA requires you to have organized, accurate records for every mile driven and every gallon purchased during the quarter. Specifically, you need:
- Mileage records by jurisdiction: Your ELD data should capture this, but you must verify it is accurate and complete. Every state you entered — even for 10 miles — must be accounted for.
- Fuel purchase receipts: Every receipt must show the date, location, vehicle identification, fuel type, number of gallons purchased, and price per gallon. Missing receipts are a major audit trigger.
- Total miles driven: Including any deadhead, bobtail, and personal conveyance miles.
- Fuel type records: Diesel, DEF, reefer fuel, and auxiliary power unit fuel are all tracked separately and reported differently.
Why So Many Owner-Operators Get IFTA Wrong
The most common IFTA mistakes we see from self-filers are not minor arithmetic errors. They are structural problems that flag your account for audit review: