IFTA – Fuel Taxes Reporting

What is IFTA?

The International Fuel Tax Agreement (IFTA) is a cooperative agreement among 48 U.S. states and 10 Canadian provinces that simplifies the reporting of fuel taxes by motor carriers operating in multiple jurisdictions.

Instead of filing separate tax returns in each state, carriers file one IFTA tax return with their base state each quarter. The agreement is administered by IFTA, Inc..

Who Needs IFTA Filing Services?

When You Need IFTA Registration

IFTA is for interstate carriers running qualifying commercial vehicles. The two thresholds — weight (over 26,000 lbs GVWR) and axles (3+) — are independent: meeting either one triggers eligibility, not both.

Once you qualify, IFTA registration is filed with your base jurisdiction, generally the state where your vehicles are registered and where you keep operational records. The base jurisdiction issues your IFTA license and decals.

Carriers operating outside IFTA member jurisdictions (Alaska, Hawaii, the District of Columbia, U.S. territories, and several Canadian territories) use those jurisdictions’ separate fuel-tax systems instead.

How IFTA Reporting Works

IFTA reconciles fuel taxes across jurisdictions. You pay tax at the pump in whatever state you fuel up — the IFTA return then reallocates that tax based on how many miles you drove in each member jurisdiction.

If you bought more fuel in low-tax states than you used there, you usually owe additional tax to higher-tax states where you ran more miles. If the opposite, you’ll see a credit or refund.

Records have to be kept for four years from the filing date. That includes original fuel receipts (date, location, gallons, price), trip sheets or ELD mileage data, and IRP registration documents that link the vehicle to your account.

Common IFTA Filing Mistakes

Audits surface the same issues year after year. The biggest one is incomplete fuel records — ELDs cover mileage well, but fuel receipts are still on the carrier to keep. A missing receipt usually means those gallons get disallowed, which raises the tax owed.

Another frequent issue is mileage that doesn’t reconcile with the route. If trip data shows fuel bought in Texas and Oklahoma but no Texas miles reported, the auditor will flag it. ELD data and trip sheets need to tell a consistent story.

Late filing is a flat $50 minimum penalty plus interest, even on a zero-activity quarter. Skipping a quarter because no miles were driven is the most preventable mistake we see.

How IFTA Connects to IRP and Fuel Tracking

If you run interstate, IRP and IFTA usually go together. IRP determines what apportioned plates your truck carries; IFTA determines what fuel tax you owe (or are refunded) by jurisdiction. Both filings use the same per-state mileage data.

That’s why clean ELD records are valuable — the same mileage breakdown that supports your quarterly IFTA return also supports your annual IRP renewal. Carriers that keep loose mileage records end up reconciling each filing separately, which is slower and more error-prone.

If you’re new to interstate operations, the practical sequence is MC authority → IRP apportioned plates → IFTA decals → first quarterly filing. We coordinate the IRP and IFTA pieces so the timing lines up with your activation.