Guides

IFTA Due Dates 2026–2027: Quarterly Return Deadlines — IFTA quarterly returns are due the last day of the month after the quarter, moved to the next business day on weekends. The Q3 2026 return is due November 2, 2026.
How to Calculate IFTA Fuel Tax: A Worked Example — Step by step: average MPG, taxable gallons, tax-paid credit, net tax and the Kentucky surcharge, worked with Q3 2026 rates for a truck running TX, OK and KY.
IFTA Surcharge: Kentucky and Virginia Explained — Kentucky and Virginia charge a surcharge on taxable gallons on top of fuel tax, with no credit for fuel bought there. How it's calculated and reported, with Q3 2026 rates.
IFTA Late Filing Penalty and Interest (2026 Rates) — Late IFTA returns pay $50 or 10% of net tax, whichever is greater, plus monthly interest per jurisdiction. The 2026 rates are 9% for US carriers and 5% for Canadian carriers.
IFTA Record Keeping: What to Keep for an Audit — IFTA records must be kept 4 years. The trip, distance and fuel receipt details auditors expect, and what happens when records are inadequate.
Non-IFTA Jurisdictions: Alaska, Hawaii, DC, Territories, Mexico — Miles in Alaska, Hawaii, Washington DC, Yukon, Northwest Territories, Nunavut and Mexico aren't taxed on the IFTA return but still count in total miles and MPG.

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