2025 MAR Filing Deadline Today – June 9, 2025

June 9, 2025

To: Statutory Assessors
Public Assessors
Cc: Municipal Clerks

The Wisconsin Department of Revenue (DOR), State and Local Finance Division would like to remind assessors of today's 2025 filing deadline for the Municipal Assessment Report (MAR).

MAR Filing Information

MAR Non-filer List

  • Summary of unfiled MAR reports (attached)
    • Report includes non-filers as of 1:00 a.m. today, Monday, June 9, 2025
  • Review the non-filer list to ensure DOR received your filing

Non-filed or Late-filed Forms

If you do not file by today, Monday, June 9, 2025, the following may occur:

  1. Municipal reporting – municipality receives a reduced levy limit due to the lack of new construction information
  2. TID reporting prior year's non-manufacturing full value is certified for the current year. This may result in less tax increment dollars available to the municipality.

Note: If you do not file a MAR by today's 11:59 p.m. deadline, DOR's Equalization Bureau will file a formal complaint against your certification with the Office of Technology & Assessment Services, requesting a review and possible revocation of your assessor certification under state law (sec. 73.09(7), Wis. Stats.).

Questions?

Contact the district office in your area.​