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Mahaska County Courthouse

Assessor: Formula for Calculating Taxes

Use this formula to help calculate a tax bill, or visit our Property Tax Estimator Tool on the Beacon website under the "More" tab in the top ribbon of the search page.

Assessed Value x Rollback - Military Credit (if applicable) x Tax District Levy - Credits/Exemptions (such as Homestead Credit) = Your Tax Bill

Example:

  • ($100,000 x 50%) - $1,852 x 0.0301234 - $100 = Tax Bill
     
  • ($50,000 - $1,852) x 0.0301234 = Tax Bill
     
  • ($48,148 x 0.0301234) - $100 = Tax Bill
     
  • $1,450.38 - $100 = Tax Bill

In Iowa, taxes are paid a year behind on the assessment year for which the value is effective.  For example, taxes on the January 1, 2021 assessments will be paid in September of 2022 and March of 2023.