Boulder, CO Sales Tax Rate
The combined sales tax rate in Boulder, Colorado is 9.195% (2.9% state, 1.335% county, 3.86% city and 1.1% special district). Calculate the sales tax on any purchase in Boulder. Rates effective July 2026.
- State tax
- 2.9%
- County tax (Boulder)
- 1.335%
- City tax (Boulder)
- 3.86%
- Special district tax
- 1.1%
- Combined rate
- 9.195%