Boulder County government offices are closed Wednesday, June 19, in observance of Juneteenth. Primary Elections Vote Center locations are open.

Your Taxes at Work
Panoramic view of the back range of the northern Colorado Rockies from Reynolds Ranch Open Space

Your Taxes at Work


“The health of our community as a whole depends on ensuring the well-being of all of our individual members. Your tax dollars contribute to a more vibrant, active and caring community for everyone by supporting a breadth of needs ranging from roads, trails and land use projects to programs that promote and protect the interests and health of our residents.” – Boulder County Commissioners

There are two primary ways that you directly contribute tax dollars to Boulder County:

Property Taxes

Property taxes within Boulder County vary according to your location within municipal and special district boundaries. Received collectively by the Boulder County Treasurer, your property taxes are then apportioned to the various governmental agencies and special tax districts to which you belong, including your local school district, fire protection district, municipality and/or water district. In all, there are 135 taxing entities that receive a portion of your property taxes each year in Boulder County alone.

Boulder County uses its portion of property tax revenue to provide essential services directly to residents as well as indirectly through funding for local nonprofit agencies.

Although an $800,000 property in a Home Rule City (e.g. Boulder, Louisville, Longmont, etc.) may have a higher tax bill than an $800,000 property in unincorporated Boulder, the county’s budget receives the same amount of revenue from both properties.

Two properties with the same valuation may have different tax rates because they are in different tax districts.

(see How Property Taxes Are Calculated.)

Property Tax Distribution

This chart reflects most tax bills in the county, but not a tax bill for someone in a metro or special district (e.g. Erie) where there are additional taxing entities.

Sales and Use Taxes

Sales taxes are collected at the point of purchase when you buy retail goods within Boulder County.

Sales & Use Taxes are collected by the State of Colorado and reapportioned back to the counties and municipalities in which they were collected. Boulder County receives 1.185 percent of the value of all purchases made in Boulder County. The total sales tax rate in Boulder County varies from location to location based on varying municipal sales tax rates.

Use taxes are assessed on motor vehicles during vehicle registration, and on the purchase of building and construction materials at retail prices, collected when a building permit is obtained. The breakdown between sales and use taxes is generally around 86% sales taxes and 14% use taxes; these percentages vary slightly year to year.

Where Do Tax Dollars Go?

The Boulder County tax dollars that you pay (summary), whether through property taxes or sales and use taxes, help support key infrastructure and services such as:

  • Transportation and road maintenance
  • Public safety, including law enforcement, courts, wildfire mitigation, jail, and emergency services
  • Health & Human Services
  • Environmental health and protection
  • Elections
  • Conservation and Open Space
  • General governmental operating costs

Combined with a variety of other funding sources, your tax dollars also contribute to help provide a breadth of other services that collectively create a healthy community. Through funding supplied by grants, state and federal allocations, your local taxes, fees and other revenue sources, Boulder County government is able to offer:

  • Health programs that provide vaccinations, protect the public health and educate community members.
  • Community Services programs that enable career growth, encourage self-sufficiency, involve children, families and aging adults in beneficial activities, and promote financial stability and homeownership.
  • Housing and Human Service programs that protect the welfare of children and older adults.
  • Financial support to nonprofit organizations that are at the very heart of our community and provide essential services.
  • A countywide Sustainability Initiative to preserve the health of our environment into the future, including pollution prevention, waste reduction and energy and resource conservation.
  • Parks and Open Space programs that protect local habitat and provide beautiful places to catch a breath of fresh air and get some exercise.
  • Transportation improvements that help make our roads and transit programs better, safer and more accessible for all members of the community.

In addition to paying property taxes, voters in Boulder County continuously show their commitment to investing in and improving their community by passing special ballot issues that enact specific property or sales and use taxes.

Some of these special tax funds include:

  • Developmental Disabilities/Health and Human Services Property Tax: Funding for local nonprofits and programs that serve the developmentally disabled; funding to support health and human services programs that have suffered funding cutbacks from other sources
  • Worthy Cause: Funding for capital improvement projects by local human services non-profit agencies
  • Open Space Sales Tax: Various taxes to support acquisition, trails and maintenance of open space.
  • Public Safety Sales Tax: A sales tax that provides funds for a jail expansion, construction of an addiction recovery center, and ongoing support for jail programs
  • Transportation Sales Tax: Includes increased transit, regional trails and bikeway shoulders
  • Housing & Human Services: Transparency: Funding to local nonprofit agencies to supporting safety net services to low-income and/or at-risk or vulnerable county residents.
  • Sustainability: Provides nationally recognized services for county employees, residents, and businesses, and provides resources, knowledge, and motivation to make sustainability an integral part of the county’s public service mission.
  • Wildfire Mitigation: Funding for wildfire mitigation efforts to proactively address the increasing risk of climate-driven wildfires through strategic forest and grassland management projects (using Fireshed partnerships) and the Wildfire Partners program.
  • Emergency Services: Funding for emergency response in Boulder County.

Contact Us

Commissioners’ Office


Commissioners' website


Commissioners’ Office
Boulder County Courthouse
Third Floor
1325 Pearl St.
Boulder, CO 80302
Map and Directions
Hours: 8 a.m. to 4:30 p.m.

Mailing Address

PO Box 471
Boulder, CO 80306