Back to All Tax Rates
Colorado
IFTA fuel tax rates and information for Colorado
Current Tax Rates
| Diesel | $0.2050 per gallon |
| Gasoline | $0.2200 per gallon |
Rates effective as of 2026-04-01. Subject to quarterly change.
State Information
Abbreviation
CO
Country
United States
Region
Mountain
Timezone
Mountain
Neighboring Jurisdictions
When traveling through Colorado, you may also need to track miles in these neighboring jurisdictions:
IFTA in Colorado
Colorado is a member of the International Fuel Tax Agreement (IFTA). Motor carriers operating qualified vehicles in Colorado must 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/gallon for diesel. If you travel more miles in Colorado 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 Colorado IFTA taxes
Use our free calculator to determine your tax liability for CO.