Oregon does not use IFTA fuel tax: weight-mile tax applies
Q2 2026 (April 1 – June 30, 2026). Verify the current quarter at iftach.org before filing.
What is IFTA?
The International Fuel Tax Agreement (IFTA) is a cooperative arrangement among the 48 contiguous US states and 10 Canadian provinces that simplifies fuel tax reporting for interstate carriers. Instead of filing separate returns with every state you operate in, you file a single quarterly return with your base jurisdiction, which distributes the tax to each state where you drove.
IFTA applies to qualified motor vehicles (GVWR over 26,000 lbs, or three or more axles) operating across two or more member jurisdictions. Each quarter you report miles and fuel purchases per state. Where you consumed more than you bought, you owe that state tax; where you bought more than you burned, you earn a credit. Your base state settles the net balance in a single payment or refund.
How IFTA filing works for Oregon-based carriers
Oregon does not participate in the IFTA per-gallon fuel tax for in-state miles. A weight-mile tax administered by the Oregon Department of Transportation (ODOT) applies instead, based on declared gross vehicle weight and Oregon road miles, not on gallons purchased. Oregon-based carriers still hold an IFTA license for other-state miles; Oregon itself shows zero per-gallon IFTA tax on your return while the weight-mile obligation is filed separately through the Oregon Trucking Online (OTO) system.
Visit the ODOT Motor Carrier Transportation Division for registration, current rate tables, and OTO filing instructions.
How the Oregon weight-mile tax works
Oregon weight-mile rates are tiered by declared gross vehicle weight: heavier loads pay a higher per-mile rate. Report Oregon miles via Oregon Trucking Online (OTO) each filing period. Oregon miles appear on your IFTA return with zero per-gallon IFTA tax due; the weight-mile payment goes directly to ODOT on a separate schedule.
Current rate tables: oregon.gov/odot/mct.
Oregon IFTA questions
Oregon does not levy a per-gallon IFTA diesel fuel tax. It uses a weight-mile tax instead, assessed by ODOT based on vehicle weight and miles driven on Oregon roads. Always verify requirements at iftach.org.
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