Verified April 2026
How to Calculate Sales Tax in San Juan, Colorado
2026 Step-by-Step Guide for Businesses & Consumers
Current San Juan Sales Tax Rate
| Jurisdiction | Rate |
|---|---|
| Colorado State Sales Tax | 2.900% |
| County Sales Tax | 6.500% |
| City / Municipal Tax | 1.000% |
| Total Combined Rate | 10.400% |
How to Calculate Sales Tax in San Juan
-
1
Find the combined rate
The combined sales tax rate in San Juan is 10.400%. This equals: Colorado state rate of 2.900% + County 6.500% + City 1.000%.
-
2
Convert the percentage to a decimal
10.400 ÷ 100 = 0.1040
-
3
Multiply by your purchase amount
Example: $100.00 × 0.1040 = $10.40 in sales tax
-
4
Add tax to the original price
$100.00 + $10.40 = $110.40 total cost
What's Taxable in Colorado?
Most tangible personal property is taxable in Colorado. Check with the
Colorado Department of Revenue for specific exemption categories.
Do You Have Nexus in Colorado?
Economic Nexus Threshold
If your business has over $100,000 in annual
Colorado sales or 200 transactions,
you are required to collect and remit Colorado sales tax. This applies to out-of-state remote sellers too.
Expert Sales Tax Tips for San Juan
Out-of-State Sellers
Selling into Colorado from out of state? Register before you cross the $100,000 threshold to avoid back taxes and penalties.
Frequently Asked Questions
Sales Tax Calculator
Using 10.400% rate for San Juan
$
Tax Amount
$0.00
Total with Tax
$100.00
Rate applied: 10.400% combined