EFFECTIVE DECEMBER 24, 2025, the United States Postal Service (USPS) is moving the postmark process from local application to regional sorting centers.

HOW THIS AFFECTS TAXPAYERS: USPS postmark change has raised concerns about the timeliness of property tax payments.  Department of Revenue recommends mailing payments earlier than usual.

POSTMARK DATE AND PROPERTY TAX PAYMENT TIMELINESS:

 Payments received by the proper official:

•  Within the five working day grace period – are considered timely, regardless of postmark (secs. 74.11 and 74.12, Wis. Stats.)
• After the grace period – must be properly addressed and postmarked befor midnight of the due date to be considered timely (sec. 74.69(1), Wis. Stats.)
• Late Payments – may be considered timely if the delay was due to a USPS delay or administrative error (sec. 74.69(2), Wis. Stats.)