Thornton Taxes

Consumer Sales Tax Rates

The total combined sales tax rate in Thornton is 8.6%, and is comprised of the following taxes...

	City of Thornton		3.75%
	State of Colorado		2.90%
	RTD/CD/SD		1.20%
	Adams County		0.75%
	Total		8.60%

Forms for Merchants and Businesses - Online and Paper

New!  Merchants, you may now pay your sales tax electronically.

• Sales and Use Tax Return
• E911 Return
• Claim for Refund

Information and Code

• Thornton Taxes Explained
• Taxation Code
• Taxation Regulations
• Tax Information Brochures
• Business Licenses
• Construction Use Tax
• New Business List
• FREE! Sales & Use Tax Seminars

About the Sales Tax Division

The City’s Sales Tax Division is responsible for collection of the following taxes and fees: sales, use, lodging and telephone taxes, and E911 surcharges. We assist businesses and the public in understanding how Thornton’s taxes apply to their operations or purchases. The Sales Tax Division is also responsible for auditing businesses to ensure that they are in compliance with the City Code.

Property taxes are administered by the County. Please contact Adams County directly for questions regarding your property taxes.

Want quick answers to common questions? Visit our new "Thornton Connected"...     Taxes FAQ

Contact Info

City of Thornton/Sales Tax Division
9500 Civic Center Drive, Suite #2050
Thornton, CO 80229
303-538-7400 Phone
303-538-7556 Fax
Hours: Monday-Friday 8:00am-5:00pm
Email: Sales Tax