Stage 1 fire restrictions, enacted for unincorporated areas of western Boulder County.

Business Personal Property

Business Personal Property Overview

About Business Personal Property

The Personal Property Section of the Assessor’s Office establishes values for business personal property (the assets owned by businesses) for ad valorem property tax purposes.

By April 15 of every year, businesses in Boulder with a total actual value of their personal property assets greater than $52,000 are required to send the Boulder County Personal Property Section a declaration listing all the assets they owned as of January 1, along with information regarding the original date and cost of acquisition for those assets. Even if assets were disposed of after January 1, they must be declared because current Colorado law does not provide for prorated assessments. The Assessors Personal Property staff takes the information provided by the taxpayer and calculates a value for each business; a Notice of Valuation is mailed by June 15.

If you have also filed a paper declaration, please note that on your online form.

The Assessor is located at 1325 Pearl St. Courthouse, Boulder on the Pearl Street Mall. The mailing address is: PO Box 471, Boulder, Colorado 80306.

New business owners may be unaware of the basic rules and procedures regarding the personal property assessment process, so please review the information in the first paragraph at the top of this page, and feel free to call the Personal Property Division at 303-441-3530 with any questions. Leasing Companies can also call this number.

Valuation Appeals

Appeals for Business Personal Property are accepted from June 15–June 30 each year. Outside of these dates:

Declaration Schedules

BPP Notice of Valuation

Valuing Business Personal Property

Business Personal Property is not taxable until the assessment date following the year in which the property is acquired and first put into use. Property value is not prorated.

The valuation and taxable status, as of January 1, remains for the entire year even if the property is:

  • Damaged
  • Conveyed
  • Enters or leaves the state
  • Changes taxable status after the assessment date

When any of these changes occur, taxpayers need to modify their asset listing when filing their declaration schedule the following year.

Appraisal Methodology for Business Personal Property

The Assessor determines the actual value of property by assessing:

  • Market
  • Cost
  • Income

Market Approach

Consists of comparing fair market sales of comparable property.

Estimates of the current selling price of the owner’s furniture and equipment. The selling price is then rolled back to the appropriate level of value used for Real Property.

Cost Approach

Estimates the material and labor costs to replace the subject property with a similar property.

Estimates the current replacement cost and the total accrued depreciation of the item. The estimate of value is then rolled back to the appropriate level of value used for Real Property.

Income Approach

Converts net income from rent to a potential worth.

Applies to leased or rented equipment when net income can be converted into an estimate of value. The value is then factored back to the appropriate level of value.

Natural Resource Properties

  • Oil and Gas Leasehold and Lands The valuation for assessment for producing oil and gas leaseholds and lands is 87.5% of the selling price of oil and gas sold or transported from the premises from primary recovery during the preceding calendar year; or 75% of the selling price of oil or gas sold or transported during the preceding calendar year from secondary recovery, tertiary recovery, or recycling project facility.

Equipment and improvements or buildings of natural resource properties are valued separately by using the three approaches to value: market, cost and income.

Mobile Equipment Located in Several Counties

The owner must show the following information with their Business Personal Property schedule:

  • Kind, description, and serial number of equipment
  • The counties in which the equipment will be located
  • Estimated time in each county
  • Mobile equipment includes drilling rigs

The Assessor in the county of original assessment will determine a value that is apportioned to each county.

Note: Some equipment is classified as type “F”, or as special mobile equipment, and is valued and taxed by the local county clerk. This property should be declared as such on the Personal Property Declaration Schedule filed by the owner.

Assessment Date

Colorado law states that January 1 is the assessment date. The Assessor determines the current use and condition of the property as of January 1 each year.

Assessed Value

The Assessor multiplies the actual value by the assessment rate of 29% to arrive at an assessed value. The assessed value is multiplied by a mill levy (tax rate) to calculate the taxes for the property.

Actual value results from the taxpayer’s Original cost factored to a Replacement Cost New, depreciated to the original year of acquisition, and factored to the base year.

Note: This assessment value does not include residential property, oil and gas lands, and producing mines.

For more information, please contact the Assessor’s Office Personal Property Department at 303-441-3530.

Contact Us


Phone: 303-441-3530
Fax: 303-441-4996


Mailing Address

PO Box 471
Boulder, CO 80306-0471

Hours: 7:30 a.m. to 5 p.m.
Closed Friday


Assessor Boulder and Longmont Drop Boxes


1325 Pearl St., 2nd floor
Boulder, CO 80302
Hours: 7:30 a.m. to 5 p.m.
Map and Directions Boulder Location


515 Coffman St., Suite 114
Hours: 7:30 a.m. to 5 p.m.
Monday only
Map and Directions Longmont Location


1755 S Public Road
Hours: 7:30 a.m. to 5 p.m.
Tuesday only
Map and Directions Lafayette Location