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Washington
IFTA fuel tax rates and information for Washington
Current Tax Rates
| Diesel | $0.4940 per gallon |
| Gasoline | $0.4940 per gallon |
Rates effective as of 2026-04-01. Subject to quarterly change.
State Information
Abbreviation
WA
Country
United States
Region
Pacific Northwest
Timezone
Pacific
Neighboring Jurisdictions
When traveling through Washington, you may also need to track miles in these neighboring jurisdictions:
IFTA in Washington
Washington is a member of the International Fuel Tax Agreement (IFTA). Motor carriers operating qualified vehicles in Washington must report all miles traveled and fuel purchased in the state on their quarterly IFTA returns.
Fuel purchased in Washington generates a tax credit at the rate of $0.4940/gallon for diesel. If you travel more miles in Washington than the fuel you purchased would cover, you'll owe additional tax. If you purchased more fuel than you used, you'll receive a credit.
Calculate your Washington IFTA taxes
Use our free calculator to determine your tax liability for WA.