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Oregon IFTA Fuel Tax Rate, 4th quarter 2026

Diesel, October to December 2026

Oregon doesn't list a diesel rate on the IFTA matrix. Trucks with a registered weight over 26,000 lbs pay Oregon's weight-mile tax, reported to the Oregon Department of Transportation (oregon.gov/odot/mct). Oregon miles still count toward your fleet MPG on the IFTA return.

Rather work it out yourself?Free IFTA calculator, rates fill in for Oregon

Oregon rates for both quarters

FuelQ4 2026 (now)Q3 2026 (return due October 31, 2026)
Diesel prices in Oregon this week Truck stops and diesel in Oregon

Source: IFTA, Inc. fuel tax rate matrix, last updated by IFTA, Inc. on 11/10/26. The 4th quarter 2026 matrix is not final until December 4, 2026. States can still send changes; see IFTA's late rate notices. Your base state's return is what counts; check its instructions before you file.

Oregon carriers: we file your IFTA return

Your 3rd quarter 2026 return is due October 31, 2026. $79 a quarter, or $300 for a full year. Fuel tax you owe is paid to your base state and isn't included.

  • Send your ELD miles report or trip sheets and your fuel card report or receipts
  • A tax professional works out every state and province and files with your base state
  • You approve the return before it is filed and get a copy for your records
  • Behind on a quarter? Pick every quarter you missed on the form
File my IFTA return

Common questions

What is the Oregon IFTA diesel tax rate for the 4th quarter 2026?

Oregon doesn't list a diesel rate on the IFTA matrix. Trucks with a registered weight over 26,000 lbs pay Oregon's weight-mile tax, reported to the Oregon Department of Transportation (oregon.gov/odot/mct). Oregon miles still count toward your fleet MPG on the IFTA return.

What Oregon rate goes on my 3rd quarter 2026 return?

Oregon doesn't list a diesel rate on the IFTA matrix. Trucks with a registered weight over 26,000 lbs pay Oregon's weight-mile tax, reported to the Oregon Department of Transportation (oregon.gov/odot/mct). Oregon miles still count toward your fleet MPG on the IFTA return.

What is a surcharge line?

Some states (for example Kentucky and Virginia) add a separate surcharge on fuel used in their state. It is listed as its own line on the IFTA matrix and on the return. The diesel totals on these pages add the surcharge to the base rate.

Why are Canadian rates shown per litre and in two currencies?

IFTA lists every rate both in U.S. dollars per U.S. gallon and in Canadian dollars per litre, using one exchange rate per quarter. A U.S.-based carrier files in gallons and U.S. dollars; a Canadian-based carrier files in litres and Canadian dollars.

Do I owe tax twice if I buy fuel in one state and drive in another?

No. You owe each state tax on the fuel you burned there (miles there ÷ your fleet MPG × that state's rate). The tax you already paid at the pump is credited. The IFTA return adds it up: you pay the states you under-paid and get credit from the ones you over-paid.

IFTA rates in other states

Canadian province rates