Glossary
IFTA (International Fuel Tax Agreement)
A fuel tax agreement between US states and Canadian provinces that replaces separate per-jurisdiction filings with one quarterly report, based on miles driven and fuel purchased in each jurisdiction.
What IFTA means in practice
IFTA (International Fuel Tax Agreement) is the fuel tax agreement between the lower 48 US states and the ten Canadian provinces that lets a carrier file one quarterly return in its base jurisdiction instead of separate filings in every jurisdiction. In practice, it comes down to two numbers per jurisdiction each quarter: distance driven and fuel purchased. Because tax rates differ and fuel is not always bought where the most miles are driven, the return works out whether the carrier owes tax or is due a credit in each jurisdiction, and the base jurisdiction settles with the others.
The hard part is the distance. Rebuilding mileage by jurisdiction from odometer readings, route memory and a shoebox of receipts is slow and error-prone, and it is how fleets end up overpaying out of caution or getting flagged in an audit. When the telematics platform already logs each border crossing, the distance-by-jurisdiction report is a query, and the crossing log settles an auditor's question about whether a trip entered a jurisdiction.
Coverage has gaps worth knowing: Alaska, Hawaii and the Canadian territories are not IFTA members, so trips there follow their own fuel tax rules.
Read the full explainer
The definition above is the short version. The page below explains IFTA (International Fuel Tax Agreement) in depth, with the rules, numbers and examples behind it.
What Is IFTA?Guides that explain IFTA (International Fuel Tax Agreement)
- When Is IFTA Due? IFTA Filing Deadlines and Late Fees
- How Much Does GPS Fleet Tracking Cost?
- DVIR Meaning: What Is a Driver Vehicle Inspection Report?
- IFTA Tax Rates by Jurisdiction: How the Rate Matrix Works
- What Is Telematics? Fleet Telematics and GPS Data Explained
- What Is Fleet Management Software? Modules and How to Choose
- How to Calculate Your IFTA Taxes: Formula and Worked Example
- IFTA Texas: How to Get a Licence and File Your Returns
IFTA: common questions
Who has to file IFTA?
Generally, carriers running qualified motor vehicles in two or more IFTA member jurisdictions. A qualified motor vehicle typically has a gross vehicle weight over 26,000 pounds, three or more axles regardless of weight, or is used in a combination over 26,000 pounds. A fleet that only ever operates within one state or province usually does not need IFTA, but regular border crossings almost certainly bring it in.
Does IFTA apply to Canadian carriers?
Yes. The ten Canadian provinces are IFTA member jurisdictions alongside the lower 48 US states, so a cross-border carrier files one quarterly IFTA return covering both sides of the border, in its base jurisdiction. The Canadian territories, Alaska and Hawaii are not members, and travel there is handled under their own fuel tax rules.
What is the difference between IFTA and IRP?
IFTA settles fuel tax each quarter, based on where you drove and where you bought fuel. IRP, the International Registration Plan, apportions the annual registration fee by distance travelled in each jurisdiction and comes with an apportioned plate and cab card. They share a weight threshold and both need distance by jurisdiction, but they are separate filings.