2018 Personal Property Assessment Information 

View our latest news: St. Charles County Assessor to Mail 2018 Personal Property Assessment Forms
Forms are due by March 1, 2018. Late filing penalties will be applied on May 1.

Visit our Personal Property Assessment E-File site to file online. Please see the graphic below for the location of your unique access code on the form. You need this code to file online. Visit our Personal Property Assessment Confirmation Database to confirm receipt of your form.
Assessment Form 2018 Graphic


The Assessor is charged with placing a fair market value on property as of the tax date. The property tax in Missouri is “ad valorem” meaning the taxes are based on the property value. 

The Assessor has no jurisdiction or responsibility for taxing jurisdiction budgets or establishing the tax rate.

Please note: Information maintained by this office is for Assessment purposes only and should not be used to verify or transfer ownership. All maps maintained, provided and/or purchased are based on Assessment information and do not represent a legal survey of the parcels shown and shall not be used for conveyance or the establishment of property boundaries.


Do I Need a Certificate of Nonassessment (Tax Waiver)?

Tax Bills

Your tax bill is comprised of 3 key components:
  • Assessment Authority
  • Taxing Authority
  • Collection Authority

Assessment Authority

The assessment authority (Assessor’s Office) is responsible for establishing the fair market value of all property within St. Charles County as of the tax date. This assures the tax burden is distributed fairly among those responsible for payment.

Taxing Authority

The taxing authority (school, city, fire districts, etc.) establishes the tax rate based on the budgetary requirements needed to appropriately fund the services provided within their jurisdiction.

Collection Authority

The collection authority (Collector’s Office) is responsible for collecting the amount of tax assigned to each property owner.