Ad Valorem filing deadline approaching – June 1, 2021

May 25, 2021

To: Ad Valorem Taxpayers


The Wisconsin Department of Revenue (DOR) would like to remind you of the upcoming June 1, 2021 filing deadline.

Forms due June 1, 2021

  • AC-001 Airline
  • RA-001 Railroad
  • PI-001 Oil Pipeline
  • PF-001 Gas Pipeline
  • CR-800 Conservation/Regulation
  • MP-800 Association of Municipal Electrics

Note: DOR will apply a non-appealable late filing penalty to all reports filed after the June 1, 2021 extended due date.

If you have any questions, contact us at utility@wisconsin.gov.​​