March 1: 2021 M-Form Deadline Approaching

February 19, 2021

To: Manufacturers


  • Disregard this reminder if you already filed or requested an extension to file your 2021 M-Forms
  • Annual filing of M-Forms is a statutory requirement for all state-assessed manufacturers

The Wisconsin Department of Revenue (DOR) would like to remind state-assessed manufacturing property owners of the upcoming deadlines for filing 2021 Manufacturing Property Returns (M-Forms).

March 1 – Filing Deadline (2021 Forms M-L, M-P, M-R)

See our website for information on how to download and electronically file (e-file) these forms.

  • Form M-P (PA-750 P) – Manufacturing Personal Property Return
  • Form M-R (PA-750 R) – Manufacturing Real Estate Return
  • Form M-L (PA-750 L) – Leased, Rented, or Loaned Personal Property Return

April 1 – Extended Filing Deadline (Forms M-L, M-P, M-R)

Late Filing Penalty

If you do not file your M-Form or file it late, you will receive a non-filing penalty and lose the right to appeal your assessment. See Late filing penalty.

If you have questions, visit our website or contact the Manufacturing & Utility Bureau District Office responsible for the location of your manufacturing property.