Overview of Business Licenses in the City of Boulder

A Business License is required for any business operating in Boulder. The application can be submitted on Boulder's Online Tax System.

Who needs a business license in the City of Boulder and why?

The City of Boulder is considered a home-rule city, meaning it administers Boulder sales tax separately from the State of Colorado. Therefore, all businesses engaged in business in the city must have a City of Boulder business license.

The Boulder Revised Code defines engaged in business in the city as: performing or providing services, or selling, leasing, renting, delivering, or installing tangible personal property for storage, use, or consumption within the city.

Engaged in business in the city includes, without limitation, any one of the following activities by a person:

(a) Directly, indirectly, or by a subsidiary, maintaining a building, store, office, salesroom, warehouse, or other place of business within the city;

(b) Sending one or more employees, agents, or commissioned sales persons into the city to solicit business or to install, assemble, repair, service, or assist in the use of its products, or for demonstration, or for any other reason;

(c) Maintaining one or more employees, agents, or commissioned sales persons on duty at a location within the city;

(d) Owning, leasing, renting, or otherwise exercising control over real or personal property within the city; or

(e) Making more than one delivery into the city within a twelve-month period by any means other than a common carrier.’

.(f) Who is a retailer or vendor in the state of Colorado making more than one delivery into the city within a twelve month period; or

(g) Making retail sales sufficient to meet the definitional requirements of economic nexus.

The Boulder Revised Code defines Person as:

“A natural person, corporation, firm, partnership, association, organization and any other group acting as a unit, as well as individuals. It also includes an executor, administrator, trustee, receiver or other representative appointed according to law. Whenever the word person is used in any provision of this code prescribing a penalty or fine as to partnership or associations, the word includes the partners or members thereof, and as to corporations, includes the officers, agents or members thereof who are responsible for any violation of such section. Person includes the plural as well as the singular.” (1-2-1 – B.R.C., 1981)

The City of Boulder Revised Code requires that all types of businesses physically located in Boulder be licensed and approved by the City before operating, regardless of whether the business makes sales of taxable property or services. If a business has more than one location in the city, each location needs a separate license.

Please keep in mind that a City of Boulder Business License comes with a tax filing requirement. There is always a tax filing requirement even if tax due is $0. The City of Boulder presumes tax liability unless it receives a tax return indicating otherwise.

Apply for a business license.

Under the "Registration" header, click "Complete a Business License Application"


  • Retail stores
  • Restaurants & Bars
  • Convenience stores & Gas stations
  • Grocery stores

The City of Boulder has a Special Event Taxpayer license available, so that you can register for the specific event you’re attending and can file your tax return right after the event ends. The registration and return process is streamlined for businesses who are only briefly in the City. Businesses who are based in the City of Boulder or who regularly do business in the City of Boulder for reasons other than special events, such as soliciting future business, do not qualify for the Special Event Taxpayer License and instead need a regular business license.

Please note that even if no sales will be made, if you are a business or organization attending or sponsoring a special event, a license is still required.

Register for a Special Event license.

Under the "Registration" header, click "Register for a Special Event"

We update the list of special events that are available based on information received from the event organizers.


  • Vendors or sponsors at city-sponsored special events
  • Vendors or sponsors at private special events


  • 501(c)(3) registered non-profits who only plan to distribute literature and will not be making any sales or soliciting donations.

Even if the business is considered 501(c)(3) tax exempt, sales tax must be collected and remitted on any sales made.

Detailed information on many tax topics is available in the form of Tax Regulations.

View a full list and text of all the City Tax Regulations.


  • Places of worship
  • Educational organizations
  • Animal welfare groups
  • Scientific groups
  • Public safety organizations
  • Government organizations

The City of Boulder requires that all businesses conducting business in Boulder, taxable or not, have this license. This includes service-based businesses.


  • Banks
  • Hair salons & aesthetic services
  • Medical services & Personal care providers
  • Law firms
  • General Contractors
  • Plumbers, Electricians, HVAC technicians, etc.
  • Professional Coaching, Therapy, Counseling, etc.
  • Events & entertainment
  • Artist, Photographer, Creator, etc.

Please refer to the City Manager Rule which establishing minimum requirements for an Application of a Sales and Use Tax (Business License) or Exempt Institution License for additional information: 3-17-3.A(19) - Establishing minimum requirements for an application for a Sales and Use Tax License or an Exempt Institution License

Effective October 1, 2021, the City of Boulder adopted Ordinance No 8457 establishing an economic nexus standard for remote sellers. This ordinance was developed by home rule municipal tax professionals, in conjunction with the business community and the Colorado Department of Revenue, as part of a sales tax simplification effort.

Economic Nexus requires remote sellers with no physical nexus in Boulder to collect and remit sales tax on retail sales of tangible personal property, commodities, and/or services. Economic nexus levels the playing field between brick-and-mortar retail stores and remote sellers and shifts the responsibility of remitting tax on online sales from the purchasers of goods and services to the retailer.

Please see our Guidance for Remote Sellers page for more information.

Apply for a Business License

Boulder Online Tax System

The Boulder Online Tax System is used for business license applications as well as for tax returns.

Complete a Business License Application

  • Click “Complete a Business License Application” under “Registration” to begin.

How to Renew your Business License

Prepare the required information

Gather the following information. Note: Boulder business licenses are issued on a site-by-site basis. Make sure you have the following information for each site, and make sure you renew each license in your Action Center.

  • Contacts
    • Names
    • Phone numbers
    • Email addresses
  • Current mailing address
  • Current location address(es)
  • Closure date (if the business has ceased operations)

Log on to Boulder Online Tax

Once you have logged in to Boulder Online Tax, under Action Center, click Renew License. Remember to renew each licensed location if you have multiple locations.

Renew your license

Complete the renewal process. Renewals are free if completed online before December 31, 2023. Business licenses renewed after December 31 will be assessed a $25 late renewal fee. If the business has changed locations within City Limits, there will be a $25 fee to license the new location.

For additional assistance please review our detailed Business License Renewal guide.

Como renovar su licencia commercial

Prepare la información requerida

Notar: Las licencias comerciales están ligadas a una ubicación. Asegúrese de tener la siguiente información para cada ubicación de su negocio y renovar su(s) licencia(s) comercial(es) en el ‘Action Center’.

  • Contactos
    • Nombres
    • Números de teléfono
    • Correos electrónicos
  • Dirección postal
  • Dirección donde su ubica(n) su(s) negocio(s)
  • Fecha del cierre (en caso que su negocio dejó de operar)

Ingrese a Boulder Online Tax

Boulder Online Tax System

En el ‘Action Center’ busque el enlace ‘Renew License’. Si su negocio tiene varias ubicaciones, recuerde que debe renovar una licencia para cada ubicación.

Renovar licencia comercial

Complete el proceso de renovación. La renovación de licencias es gratuita si se lleva a cabo a tiempo. Si su negocio ha cambiado de ubicación dentro de los límites de la ciudad de Boulder, habrá un costo de $25 para tramitar una licencia con la nueva ubicación.