Boulder, CO Sales Tax Rate and Calculator
The combined rate is 9.195% as of July 1, 2026. Enter an amount to see the tax.
Updated October 2026Calculate Sales Tax in Boulder, CO
Tax Breakdown
Tax Details
Boulder sales tax rate: 9.195%
The combined sales tax rate in Boulder, CO is 9.195% as of July 1, 2026: 2.9% state, 1.335% Boulder County, 1% RTD, 0.1% Cultural Facilities District and 3.86% city. Boulder has about 108,250 residents.
At 9.195%, a $500 purchase in Boulder adds $45.98 in tax and a $2,000 one adds $183.90. With a median household income of $85,364 (Census ACS 5-Year 2023), that larger bill equals about 11% of a week's income here.
Among the 3 Colorado places covered on this site, Boulder ranks highest. Rates run from 8.15% in Broomfield to 9.195% in Boulder.
Boulder is a home-rule city that collects its own 3.86% tax; food and drink for immediate consumption carries a higher city rate. Read from the Colorado DOR rate dashboard (DR 1002); not yet confirmed on the City of Boulder's own rate page. Groceries are exempt from the Colorado state rate. The local tax on groceries in Boulder is not verified here and is not included. Rates can change at the start of each quarter. Source: Colorado revenue department, read October 13, 2026.
Colorado Sales Tax Rates
State Rate
2.90%
Boulder Local Rate
6.295%
Boulder Combined
9.195%
Local rates vary by city, county and special district. State rate source: Colorado revenue department (the 2.9% state rate is listed in the DR 1002 rate dashboard, an interactive report rather than a page of text), checked October 13, 2026.
Exemptions & Taxable Items
- • Groceries are exempt from the Colorado state rate. The local tax on groceries in Boulder is not verified here and is not included
- • Clothing is subject to sales tax
- • Prescription medicine is generally exempt
Sales Tax Examples in Boulder
| Purchase Price | Sales Tax | Total Cost |
|---|---|---|
| $25.00 | $2.30 | $27.30 |
| $100.00 | $9.20 | $109.20 |
| $500.00 | $45.98 | $545.98 |
| $1,000.00 | $91.95 | $1,091.95 |
Based on the Boulder combined rate of 9.195% (July 1, 2026).
Sales Tax FAQ, Boulder, Colorado
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Disclaimer: For informational purposes only. Not tax, legal, or financial advice.