2023 WI Act 12 – TID Adjustment Process

August 30, 2023

To: TID Lists, Assessors
Municipal Clerks and Treasurers

Note: Disregard this message if you do not have a Tax Incremental District (TID) in your municipality.

The Wisconsin Department of Revenue (DOR), State and Local Finance Division is providing additional information about the impact of 2023 Wisconsin Act 12 to Tax Incremental Districts (TIDs).

General 2023 WI Act 12 Information

  • Effective – January 1, 2024
  • Exempts certain personal property from taxation
  • Allows municipalities with TIDs affected by this change to request DOR adjust a TID’s base value to account for exempt personal property


  • Due date – October 31 to request an adjustment effective in the following tax year
  • DOR will review requests received:
    • By October 31, 2023 – for adjustment in the 2024 tax year
    • Between November 1, 2023 and October 31, 2024 – for adjustment in the 2025 tax year


Additional Information


Contact us at tif@wisconsin.gov