Sales Tax in Alamosa, Colorado in 2025

We'll walk you through how the sales tax rate is determined for Alamosa and address some common questions you may have. We'll also cover how to collect, audit, and remit sales tax in Alamosa.

Plus, we’ll share the best solution that will ensure you are always compliant across the entire sales tax lifecycle.

Disclaimer: Our sales tax data is updated on a quarterly basis.

Alamosa Sales Tax Rate 2025

Alamosa is located in Alamosa County in Colorado, United States, and has a sales tax rate of 8.40%. This includes local and state sales tax rates.

Here is the breakdown of the Alamosa's sales tax:

Tax Jurisdiction	Sales Tax Rate
State Tax	2.90%
County Tax	3.00%
City Tax	2.50%
Combined Rate	8.40%

This rate applies to the following zip codes in Alamosa:

District	Zip Codes	Combined Sales Tax Rate
Alamosa County	81101	8.40%

How Does the Alamosa Sales Tax Compare to the Rest of Colorado?

Alamosa’s 8.40% sales tax rate is 2.80% lower than the highest sales tax rate in Colorado, which stands at 11.20% in cities like Winter Park.

It is 5.50% higher than the lowest sales tax rate in Colorado, which stands at 2.90% in cities like Arapahoe.

To give you a better idea, here’s a comparison of Alamosa sales tax rates with a few other cities in Colorado:

City	Sales Tax Rates
Winter Park	11.20%
Durango	8.40%
Alamosa	8.40%
Silverthorne	8.375%
Arapahoe	2.90%

What Creates Sales Tax Nexus in Alamosa?

Alamosa has the same sales tax nexus rules as Colorado. 

Read More: Check out this detailed guide on Sales Tax in Colorado.

You have sales tax nexus in Alamosa if you meet one of the following conditions:

• Physical nexus: Businesses with a physical location in Colorado must follow all sales tax licensing and collection rules if the retailer maintains any place of business in the state directly, indirectly, or by a subsidiary. A place of business may include an office, distribution center, salesroom, warehouse, storage space, or even a home office of a Colorado-based employee. 
• Employees: A retailer will have nexus through an employee who is a salesperson or a representative of the business.
• Economic nexus: Businesses must collect Colorado sales tax if their retail sales into the state during the current calendar year exceed $100,000. 

What Products Are Exempt from Alamosa Sales Tax?

Alamosa follows the same sales tax rules as Colorado and doesn't have any special exemptions. 

The items exempt from sales tax in Alamosa are:

• Food purchased for human consumption, except for hot food ready to be eaten or heated in the store. 
• Gas, electricity, coal, wood, and fuel oil sold for residential use. 
• All prescription drugs dispensed by a practitioner with a valid prescription. 
• Certain medical supplies and materials.
• Farm equipment, such as farm tractors, irrigation equipment, dairy equipment, and more.

Who Needs a Sales Permit in Alamosa?

You need a sales permit if you are a retailer located in Alamosa or if you have a sales tax nexus.

You can register for a sales tax permit online via the Colorado Department of Revenue Website or offline by submitting form CR 0100. 

How to Collect Sales Tax in Alamosa

Colorado is a destination-based sales tax sourcing state. 

This means that when you make a taxable retail sale to a customer in Alamosa, whether from outside or within the state, you must apply the sales tax rate according to the buyer's shipping address.

Learn more about origin-based and destination-based sales tax sourcing here.

How to File and Pay Sales Tax in Alamosa

You can file Alamosa sales tax returns using the following methods:

• Automated: Let Zamp handle your Colorado sales tax filing and remittance so you won’t have to deal with sales tax returns ever again.
• Online: If you have more than one business location, you must file a separate return in the Revenue Online Website for each location.
• Approved Sales Tax Software: Vendors with multiple locations can use Approved Sales Tax Software, which will automatically generate electronic XML files that can be uploaded to Revenue Online.
• Sales Tax Spreadsheet E-Filing: Multiple location filers who don’t use the Approved Sales Tax Software can use Sales Tax Spreadsheet E-Filing.
• Offline: You can select the applicable forms and mail them to:
  Colorado Department of Revenue
  
  Denver, CO 80261-0013