The property tax cycle in Iowa takes a total of eighteen months from start to finish. It begins with the assessor determining the assessed values and classification for individual parcels of property January 1st of the assessment year. The first half payment for property taxes related to this assessment is due in the fall of the next year and the second half payment is due in the spring of the year following the first half payment. As an example, the assessment for January 2023 would have the associated taxes due in the fall of 2024 and the spring of 2025.
In Iowa, the local assessor establishes the valuation and classification of the property, the county auditor determines levy rates based on budgets provided from local levying authorities and the tax base applicable to each authority. The county auditor then bills the taxes and they are collected by the county treasurer. The county treasurer then allocates the collected tax dollars to each authority. There are over 2,000 levying authorities in the state.