Owner-Operator · Compliance
IFTA Explained for Owner-Operators
IFTA is a fuel tax settlement between states. You buy fuel where it is convenient, you run miles where the freight is, and every quarter the paperwork squares up who is owed what. Keep the records and it is routine. Skip them and it is an audit.
Written and reviewed by Christopher Scott Sneed, 30+ year diesel technician, founder of Blue Collar Empire. Updated 2026-08-28.
Who has to file
Generally any qualified motor vehicle operating in more than one member jurisdiction — typically a truck over 26,000 pounds gross or with three or more axles. You license in your base jurisdiction, get decals for each truck, and file quarterly.
The two numbers that drive everything
- Miles traveled in each jurisdiction, for each truck, for the quarter.
- Gallons purchased in each jurisdiction, backed by receipts showing date, seller, gallons, and unit price.
How the calculation works
Total miles divided by total gallons gives your fleet MPG for the quarter. Miles in each jurisdiction divided by that MPG gives gallons consumed there. Gallons consumed times that jurisdiction's tax rate is tax owed; gallons purchased there times the rate is tax already paid. The difference per jurisdiction is what you pay or get credited.
Records you must keep
- Trip records or ELD/GPS data with routes and jurisdiction mileage
- Every fuel receipt, including reefer fuel kept separate
- Odometer readings at the start and end of each trip
- Records retained for the period your base jurisdiction requires — typically four years
What triggers audits
- MPG that is implausible for the equipment, or that swings wildly quarter to quarter
- Miles reported in a jurisdiction with no fuel purchases anywhere near it
- Missing receipts or gaps in trip mileage
- Filing late, or filing zero when the truck clearly ran
Tools that do this work for you
Everything above is included in the Blue Collar Empire membership — $14.99 a month.
Frequently asked questions
- When are IFTA returns due?
- Quarterly, on the last day of the month following the quarter end. File even in a quarter you did not run — a zero return is still a return.
- Do I need IFTA if I only run in one state?
- No. IFTA applies to qualified vehicles operating in more than one member jurisdiction. Intrastate-only operations follow their state's fuel tax rules instead.