Property Tax Calculation

Your property taxes are determined by multiplying the actual value times the assessment rate times the mill levy. The assessment rate on residential properties is 11.5%. The assessment rate for commercial and industrial purpose is 25%. The assessment rate is fixed by law and is the same statewide.

Simple Calculation

  • Let's assume the market value of your home has been determined to be $60,000 and the statewide residential assessment rate is 11.5%. This would mean the assessed value of your home would be $6,900 ($60,000 X .115 = $6,900).
  • Let's also assume the total mill levy determined by the local taxing authorities, your particular taxing district has been set to 125.000 mills.
  • Multiply the assessed value of your property ($6,900) by the mill levy (125 mills or .125). The taxes on your home would be $862.50, which is your share of the total responsibility to support the programs for which the taxes are budgeted.
  • Actual Market Value ($60,000) X .115 (State Residential Assessment Fee) = $6,900 (Assessment value)
  • Assessed Value ($6,900) X .125 (Mill Levy) = $862.50 (Tax Amount)

View Harper County's Tax Unit map.

Assessment Ratios

Property TypeAssessment RateClass: Rural or Urban
Residential – Includes homes, apartments, and condominiums11.5 %R
Commercial – Real property used for commercial or industrial purposes25%C
Residences on farm homesteads11.5%F
Agriculture Land – Land used to develop agricultural use30%A
Agriculture Improvements – Improvements on land devoted to agricultural use25%A
Vacant Lots – Vacant land with no improvements
Non-Profit – Real property owned and operated by not-for-profit organizations12%N
Tax exempt property0%E
All Others – Rural and urban real property not elsewhere classified30%O