Boulder County
•
Colorado (CO)
23 ZIP Code
Boulder County, CO Sales Tax Rates 2026
2026 sales tax rate guide for Boulder County, CO. Average combined tax rate is 6.53% with local jurisdictions ranging up to 9.44%.
Average Combined Rate
6.53%
Estimated Tax Range: 5.18% - 9.44%
⚡ Direct Tax Answer & Key Takeaway
As of 2026, the local county sales tax rate in Boulder County (Colorado) is 1.19%. Combined sales tax rates across cities in this county range from 5.18% to 9.44% (averaging 6.53%).
County Tax
1.19%
Average Combined Rate
6.53%
Max Local Rate
9.44%
Indexed Cities
13
Cities & Towns in Boulder County
| City | Combined Sales Tax Rate | Action |
|---|---|---|
| Boulder | 9.04% | View Tax Rates → |
| Longmont | 8.71% | View Tax Rates → |
| Superior | 8.96% | View Tax Rates → |
| Niwot | 5.18% | View Tax Rates → |
| Nederland | 9.44% | View Tax Rates → |
| Allenspark | 5.18% | View Tax Rates → |
| Pine Brook Hill | 5.18% | View Tax Rates → |
| Eldorado Springs | 5.18% | View Tax Rates → |
| Gold Hill | 5.18% | View Tax Rates → |
| Bonanza Mountain Estates | 5.18% | View Tax Rates → |
| Hidden Lake | 5.18% | View Tax Rates → |
| Valmont | 5.18% | View Tax Rates → |
| Leyner | 5.18% | View Tax Rates → |
📋 State Tax Rules & Compliance Guide
Sourcing Rule:
Destination-based
Groceries & Food:
Exempt (0% Tax)
Clothing & Apparel:
Taxable at standard rate
SaaS & Digital Goods:
Non-Taxable
Economic Nexus Threshold:
$100,000 in sales or 200 separate transactions
Official Tax Authority:
Colorado Department of Revenue ↗
Interactive Sales Tax Calculator
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ZIP Codes in Boulder County
❓ Frequently Asked Questions
Key questions and answers regarding sales tax rates, exemptions, and compliance.