Boulder, Colorado Sales Tax Calculator (2026)
7.86% total combined rate — includes state and local taxes.
Boulder’s total rate is about 7.86%, supporting green initiatives and sustainable city programs.
Boulder Sales Tax Calculator
Enter a purchase amount — we’ll calculate the total with Boulder’s tax rate.
Rate
7.86%
Tax
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Total
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The current combined rate for Boulder is 7.86%.
Boulder Sales Tax Breakdown
- State Rate: 2.90%
- City Rate: 3.86%
- County Rate: 1.00%
- Special Rate: 0.00%
- Total: 7.86%
About Boulder
Boulder applies a mix of city and county taxes to fund environmental, public, and educational projects.