All jurisdictions
United States · WA
Washington
IFTA fuel tax rates, jurisdiction details, and neighboring states for Washington.
Current tax rates
Diesel
$0.4940/gal
Gasoline
$0.4940/gal
Effective 2026-04-01. Per gallon, USD.
Jurisdiction
Code
WA
Country
United States
Region
Pacific Northwest
Timezone
Pacific
Neighboring jurisdictions
Trips through Washington commonly cross into these. Check their rates if you log miles there too.
IFTA in Washington
Washington is a member of the International Fuel Tax Agreement. Carriers operating qualified vehicles in Washington 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/gal/gal for diesel. If you put more miles on the road in Washington than the fuel you purchased there would cover, you owe additional tax. If you purchased more fuel than you used, you receive a credit.
Calculate WA