Boulder, ColoradoSales Tax Rate 2025

Boulder is located in Boulder County, Colorado. Boulder sales tax rate is 9.05%.

The total sales tax rate in Boulder comprises the state tax, the sales tax for county, and any applicable special or district taxes. The city also imposes an additional sales tax of 3.86%. The table below provides a breakdown of the sales tax rate by jurisdiction.

Combined Sales Tax Rate	9.05%
Colorado	2.90%
Boulder County	1.19%
Boulder	3.86%
District / Special Tax	1.10%

Boulder Sales Tax Calculator

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The TaxHero sales tax calculator provides a combined sales tax rate based on a full address lookup. A complete address ensures precision since ZIP codes may cross different tax jurisdictions. Results are for reference and may need additional context for compliance. Contact us today for a demo and learn how TaxHero can support your business.

Boulder District and Special Tax Rates+

To help you identify the correct sales tax rate in Boulder, you may look up the sales tax rate by address and ZIP code in our calculator.

Boulder Tax Department Contact Information+

State: Colorado Department of Revenue
City: Boulder Tax Department
Contact: 303-441-3051

ZIP codes in Boulder, CO+

80301 80302 80303 80304 80305 80306 80307 80308 80309 80310 80314 80321 80322 80323 80328 80329

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