Tax Calculation Process & Tax Worksheet

Mathematics of Property Tax

To determine the amount of your property taxes, several values are needed. These values are the Fair Market Value (FMV), Assessed Value (ASV), and the Millage Rate. The Millage rate is determined by the proposed budget divided by the tax digest. The Millage Rate is defined as dollars per $1,000 of assessed value. Example: 2021 unincorporated rate is.027171 which equals approximately $27.17 per $1000 of assessed value.

  • Fair Market Value (FMV) × 40% = Assessed Value
  • Assessed Value (ASV) × Millage = Tax
  • Tax digest = Total of all Assessments
  • Millage Rate = Proposed Budget divided by Tax digest
  • Millage is usually expressed as dollars per $1,000 of Assessed Value

Example: In 2021, the County millage rate was set at .027171. The ASV of property with an FMV of $100,000 would be 40%, or $40,000. Multiply the ASV of $40,000 by the millage rate of .027171 to get a close estimate of the property tax amount. In this example, the property tax would be approximately $1,086.84.

Tax Calculation Worksheet

Use only to estimate taxes.

The Tax Calculation Worksheet is a tool to estimate taxes only. We do not certify the tax computation as true and accurate. A change in millage rates, values, and fees can affect the total tax amount. No warranties, expressed or implied, are provided with the use of this worksheet. The county, its elected officials, officers, employees, and agents assume no legal responsibilities for the information or accuracy contained in the computation including any action taken from reliance on the calculation of tax, and shall have no liability for any damages, losses, costs, or expense including, but not limited to attorneys fees arising from the use or misuse of the information calculated. The User's use thereof shall constitute an agreement by the User to release the county, its elected officials, officers, employees, and agents from such liability. By using this information, the User is stating that the above Disclaimer has been read and that he/she has full understanding and is in agreement with the contents.

Download the 2023 Tax Calculation Workbook (XLSX).