Colorado Sales Tax Guide

Just like a trail guide through the majestic Rockies, this guide will lead you through the sometimes steep and treacherous terrain of sales tax Colorado. Unpacking the complexity of Colorado’s sales tax can be challenging. This guide aims to provide a comprehensive understanding of the intricacies of the sales tax Colorado businesses need to know.

US State

Base Tax Rate

Tax rate range

Economic Nexus Threshold for taxable transactions

Filing Due Dates for state




20th of the month following the reporting period

What is the sales tax rate in Colorado?

The state sales tax rate in Colorado is 2.9%. But that’s not the whole picture. Colorado operates a “home-rule” system, meaning that municipalities can set their own sales tax rates. This can make the combined sales tax rate in some Colorado locations as high as 11.2%.

When should your business collect Sales Tax in Colorado?

If your business has a sales tax nexus in Colorado, it is obligated to collect and remit sales tax. Nexus can be established in various ways, including through a physical presence or economic activity in the state. So the requirement to collect sales tax applies regardless of whether the sale is made at a retailer’s location in Colorado or delivered to the customer at a location in Colorado.

Colorado Physical Sales Tax Nexus

A physical sales tax nexus in Colorado is formed when a business maintains a physical presence in the state.

Sales Tax Physical Nexus checklist for Colorado

The following conditions might establish a physical nexus in Colorado:

  • Operating an office or warehouse
  • Employing residents in the state
  • Storing inventory in the state
  • Regularly conducting meetings or business activities

Colorado Economic Nexus: Revenue, Thresholds and Transactions

In Colorado, an economic nexus is established if your business has more than $100,000 in gross sales or services in the state over the past calendar year.

Which services are taxable in Colorado?

Not all services are taxable in Colorado. However, even non-taxable services may be subject to sales tax if they are provided as part of a transaction involving the sale of tangible personal property.

There are also a few exemptions, with taxable services that include:

  • Furnishing rooms or accommodations
  • Telecommunication services
  • Information and software services 

Colorado Sales Tax on Products: How to Calculate What Your Business Should be Charging

To determine the sales tax to charge, multiply the total price of the taxable item by the combined sales tax rate of the location where the sale is made. 

How Much is the Colorado Clothing Tax? 

The sale of clothing is subject to the state sales tax rate of 2.9% and local surtaxes which can bring the total clothing sales tax up to 11.2% in Colorado. 

Colorado Online Sales Tax: Are SaaS and Digital Services Taxable?

SaaS and digital services are generally not taxable in Colorado, but it’s important to check the specific circumstances and consult the Colorado Department of Revenue’s Sales Tax Guide for more information.

SaaS Sales Tax Colorado: Does my Business Need to Charge Sales Tax for SaaS in Colorado?

Colorado as a state does not charge Colorado SaaS Sales Tax. However, it’s important to note that some home-rule cities in Colorado, such as Denver, may subject SaaS sales to their local retail sales tax rate under certain criteria.

How can a business get a sales tax permit in Colorado?

Businesses can apply for a Colorado sales tax license online through the Colorado Department of Revenue’s Colorado Taxpayer Access Point (COFTAP).

Collecting Sales Tax in Colorado as a Business

Businesses in Colorado should collect sales tax based on the tax rate of their customer’s location (destination-based sales tax).

Colorado Sales Tax Return Due Dates Explained

Sales tax returns in Colorado are typically due on the 20th of the month following the reporting period.  The due dates for quarterly filing are as follows:

Q1 (Jan – Mar): April 20

Q2 (Apr – Jun): July 20

Q3 (Jul – Sep): October 20

Q4 (Oct – Dec): January 20

Corporations must file their sales tax returns by the 15th day of the fourth month following the close of the taxable year. Typically, this means April 15 for a calendar year filer.

Denver has its own tax regulations, and returns and payments are due on or before January 31. If the due date falls on a holiday or weekend, the return will be considered due on the next business day.

What is the required frequency for sales tax returns in Colorado?

The frequency for filing sales tax returns in Colorado is determined by the amount of sales tax your business collects.

How to file sales tax in Colorado in 4 easy steps


Do a Nexus Check

Review your business’s activities to confirm whether you have established a sales tax nexus in Colorado.


Calculate what sales tax you owe

Determine the total amount of sales tax your business has collected from Colorado customers during the filing period.


File your sales tax return

You can file your sales tax return online via the Colorado Department of Revenue’s Taxpayer Access Point or by mail.


Make the payment

Pay any sales tax owed at the time of filing. You can pay online or by mail.

Colorado’s sales tax can be complex due to its home-rule system. However, understanding the sales tax obligations of your business can help ensure compliance and avoid penalties. This guide was written to be a map that helps to guide you through the rocky paths of sales tax. But sales tax can leave you lost in the wilderness even with the best map at hand, and it only becomes more complex when your sales increase or you start selling in multiple states of the US.

That’s where Complyt comes in. We make automated sales tax compliance simple and easy. Contact us so we can airlift you to the top of this Sales Tax mountain.