How IFTA works in Washington

Washington is an IFTA member jurisdiction. Carriers file quarterly fuel tax returns through their base jurisdiction, reporting Washington miles and fuel alongside all other IFTA jurisdictions traveled during the quarter.

Who needs to report Washington miles

  • Interstate carriers crossing into Washington from Oregon, Idaho, or Canada
  • Washington-based fleets with qualified vehicles
  • Port and regional haulers running qualified equipment on IFTA plates

Washington mileage and fuel records

  • Trip detail for Washington segments
  • Quarterly Washington mileage totals
  • Fuel receipts for Washington purchases
  • Supporting records for I-5, I-90, and cross-border routes

See mileage records guide.

Canada–Washington border considerations

Carriers running between Washington and British Columbia need both U.S. IFTA reporting and Canadian IFTA reporting where applicable. Washington miles and Ontario or other province miles may appear on the same quarterly workflow for international operators.

How IFTAfy helps with Washington miles

IFTAfy splits jurisdiction miles on Pacific Northwest routes, logs fuel and receipts, and supports quarterly IFTA report review on mobile and web.

Important note

This guide is educational, not tax or legal advice. Confirm current Washington DOL IFTA requirements before filing.