IFTA requires you to file a single quarterly return with your base state that accounts for fuel tax owed or credited across every jurisdiction where your trucks operated. The return reconciles how much fuel you purchased in each state against how many miles you drove there. States where you bought more fuel than you burned get credited. States where you drove more than you fueled up get billed.

The foundation of accurate IFTA reporting is tracking two things: miles by jurisdiction and fuel purchases by jurisdiction. Modern ELDs handle the mileage side automatically. Your devices record every state line crossing and calculate miles driven in each state. If you’re still tracking manually, you need drivers logging odometer readings at every state border. That method introduces errors and takes time your drivers don’t have.

Fuel tracking requires keeping every receipt with the state of purchase clearly documented. Fuel cards from major truck stops generate detailed reports showing gallons purchased by location and date. These reports map directly to what you need for IFTA. Cash purchases require paper receipts with state, date, gallons, and fuel type recorded. One missing receipt probably won’t trigger an audit, but a pattern of gaps will.

Each quarter, you calculate the fuel consumption rate for your fleet by dividing total miles by total gallons. Then you apply that rate to miles driven in each jurisdiction to determine fuel “owed” there. Compare that to fuel actually purchased and you get the net tax position by state. Some states will show a credit because you bought fuel there but drove fewer miles. Others will show tax due because you drove through without stopping.

Filing deadlines fall on the last day of April, July, October, and January for the preceding quarter. Late filings trigger penalties and interest. Repeated late filings can result in losing your IFTA license, which means your trucks can’t legally cross state lines.

Keep records for four years. That means fuel receipts, trip reports, mileage summaries, and the returns themselves. IFTA auditors can request documentation going back that far, and if you can’t produce it, they’ll estimate your liability and it won’t be in your favor.

The mechanics aren’t complicated, but the discipline is demanding. Most transportation and logistics businesses struggle not because the math is hard but because the data collection falls apart. Drivers forget to save receipts. Trip logs are incomplete. Someone keys in the wrong state code. These small errors compound into big discrepancies at filing time.

Software designed for trucking operations can pull fuel card data and ELD mileage into a single report that’s ready to file. If you’re running more than a few trucks, automating this process pays for itself in time saved and errors avoided. For smaller operations, a well-organized spreadsheet updated weekly works as long as you actually do it weekly.

IFTA is one piece of the compliance picture for multi-state carriers. It connects to your overall bookkeeping because fuel costs are a major expense category and the tax payments or credits affect your cash flow. Working with Andover, MA advisory services that understand trucking means your IFTA data integrates cleanly with your financial statements instead of living in a separate silo that never gets reconciled.

The carriers who stay out of trouble are the ones with systems that capture data in real time rather than scrambling to reconstruct it when the quarter ends. Build the habit now and IFTA becomes a routine filing instead of a quarterly crisis.