TAX & LICENSE / STATE TAX SYSTEM

State Income Tax
Colorado applies a flat tax rate of 4.63 to taxable income. Variables that affect taxable income include filing status, exclusions, and credits. Some these allowable credits include taxes paid to other states, earned income credit, and a child care or child tax credit. If you have questions, require forms, or need help with a problem, contact the Taxpayer Service Division:

Colorado State Department of Revenue
Taxpayer Service Division
General Information
303-238-SERV
Telefile, Forms, Refunds
303-238-FAST
https://cdor.colorado.gov/

Mail Forms to:
Colorado Department of Revenue
1375 Sherman Street
Denver, CO  80261-0005

Colorado Sales Tax
Colorado imposes a sales/use tax of 2.9 percent, although many cities and counties as well as special taxing districts add local sales and use taxes on purchases and transactions. All county sales taxes are state collected. Most goods are subject to sales tax and most services are not taxed as long as the billing separates the two. The combined state and local sales tax rate varies from 3.7 to 7.2 percent depending upon the locality. Use taxes are due to the state by individuals who have purchased merchandise outside of Colorado such as Internet or catalog orders when sales tax has not been paid but the items will be “used” in Colorado. For complete details on sales and use taxes, contact:

Colorado State Department of Revenue
Taxpayer Service Division
303-238-SERV
https://cdor.colorado.gov/

Local Tax Rates
303-238-FAST
https://www.colorado.gov/revenueonline

Property Taxes
Property taxes are administered at the county level, supervised by the Colorado Department of Local Affairs, Division of Property Taxation. For questions about property tax rates, valuation, or tax collection, contact the state office or your county assessor:

Colorado Division of Local Affairs
Division of Property Taxation
303-866-2371
https://cdola.colorado.gov

County Assessors

Adams County
720-523-6038
https://www.adcogov.org/assessor

Arapahoe County
303-795-4600
https://www.arapahoegov.com

Boulder County
303-441-3530
www.countyoffice.org/co-boulder-county-assessor

Broomfield City/County
303-464-5815
https://www.broomfield.org

Clear Creek County
303-679-2322
https://www.clearcreekcounty.us

Denver City/County
720-913-4162
https://www.denvergov.org/Government/Departments/Department-of-Finance/Our-Divisions/Assessors-Office

Douglas County
303-660-7450
https://www.douglas.co.us/assessor/#/

Eagle County
970-328-8640
www.eaglecounty.us

Elbert County
303-621-3101
https://www.elbertcounty-co.gov/

El Paso County Assessor
27 E. Vermijo Avenue
Colorado Springs
719-520-6600
https://www.elpasoco.com/

Jefferson County
303-271-8600
https://www.jeffco.us/

Larimer County
970-498-7050
https://www.larimer.org/assessor

Summit County
970-453-3480
303-573-5887
https://www.summitcountyco.gov

Weld County
970-353-3845
720-652-4200
https://www.weldgov.com/Home

County Treasurers

Adams County
720-523-6160
https://www.adcogov.org/treasurer

Arapahoe County
303-794-4550
https://www.arapahoegov.com

Boulder County
303-441-3520
https://bouldercolorado.gov

Broomfield City/County
303-464-5819
https://www.broomfield.org

Clear Creek County
303-679-2300
https://www.clearcreekcounty.us

Denver City/County
720-865-7202
www.denvergov.org

Douglas County
303-660-7465
www.douglas.co.us

Eagle County
970-328-8860
www.eaglecounty.us

Elbert County
303-621-3120
www.elbertcounty-co.gov

Jefferson County
303-271-8330
www.jeffco.us

Larimer County
970-498-7020
www.larimer.org

Summit County
970-453-3440
https://www.summitcountyco.gov

Weld County
970-353-3845
720-652-4200
https://www.weldgov.com/Home

Federal Income Tax

Internal Revenue Service
Information
800-829-1040
Forms Line
800-829-3676
Tele-tax
800-829-4477
https://www.irs.gov/