Glossary · updated May 2, 2026
IFTA
Also known as: International Fuel Tax Agreement
By Korey Sharp-Paar · Reviewed by the Fast Trucking Compliance team
Definition
IFTA — International Fuel Tax Agreement — is the multi-jurisdictional tax-collection agreement among 48 US states and 10 Canadian provinces under which a single fuel-tax license issued by the carrier's base jurisdiction satisfies the fuel-tax obligations in all member jurisdictions. Carriers file quarterly returns reporting miles and fuel by jurisdiction; the base state computes net redistribution. Required for any qualified motor vehicle (over 26,000 lbs gross, or 3+ axles) operating in two or more IFTA jurisdictions. Quarterly returns due Apr 30, Jul 31, Oct 31, Jan 31. License renewal annual. Decals must be displayed on both sides of the cab.
Authoritative source
Read more
IFTA Filing Complete GuideQuarterly fuel tax mechanics, base-state filing, and the audit math IFTA inspectors use.
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