Per statute, the Treasurer's Office bills and collects property taxes, based on assessed valuations provided by the County Assessor and mill levies set by more than 100 taxing authorities (County, School District, Municipalities, and Special Districts). In addition, the Treasurer bills and collects certified special assessments for special improvement, local improvement, and general improvement districts. Collected taxes and special assessments are then apportioned and disbursed to the various taxing authorities.

The Treasurer's Office is impacted by growth in the County. Each new parcel created by development means more taxes to be billed, collected, accounted, and disbursed. Growth in tax levying authorities and additional special assessment districts leads to more complicated billing, accounting, and disbursing procedures. Annually, delinquent taxes against real property are sold at tax lien sales; and some personal property may be seized and sold for tax payment.

The Treasurer's service fees are established by statute. This is one of the few county offices which generates more direct revenue than it expends. However, given that the Assessor's main function is to establish a property tax generation base, and statutes have not provided revenue sources for the Assessor, the Treasurer's tax fees should be viewed as a funding source for the combined cost of property tax generation (assessment and collection) rather than as surplus to the Treasurer's office.

The Treasurer's Office is also responsible for all banking relationships as well as the investment of county funds in accordance with Colorado State Statutes. Investments earnings generated by the Treasurer are credited to most funds in proportion to their balances.