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United States · CO
Colorado
IFTA fuel tax rates, jurisdiction details, and neighboring states for Colorado.
Current tax rates
Diesel
$0.2050/gal
Gasoline
$0.2200/gal
Effective 2026-04-01. Per gallon, USD.
Jurisdiction
Code
CO
Country
United States
Region
Mountain
Timezone
Mountain
Neighboring jurisdictions
Trips through Colorado commonly cross into these. Check their rates if you log miles there too.
IFTA in Colorado
Colorado is a member of the International Fuel Tax Agreement. Carriers operating qualified vehicles in Colorado report all miles traveled and fuel purchased in the state on their quarterly IFTA returns.
Fuel purchased in Colorado generates a tax credit at the rate of $0.2050/gal/gal for diesel. If you put more miles on the road in Colorado 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 CO