Boulder, ColoradoSales Tax Rate 2025

The City of 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+

If you make retail sales in Colorado subject to the state sales tax from a business located in a taxing district, district sales tax is generally due on your sales of tangible personal property. In Colorado, districts have varying sales tax rates.

Some areas impose combined state, county, and city fees. Out-of-state retailers making taxable transactions to customers in the town are required to collect and remit this combined fee percentage based on the destination of the goods. To help you identify the correct rates in any city, you may look up the rate by address and ZIP code in our calculator.