Wisconsin Property Tax Objection — 2026 Guide

How to File an objection Your Property Tax Assessment in Wisconsin

The general objection process in Wisconsin:

1. Meet the deadline: Wisconsin assessment appeals run on a municipal Board of Review (BOR) session, not a single statewide calendar date. Each municipal (town, village, or city) BOR meets annually at any time during the 45-day period beginning on the 4th Monday of April, and may not convene sooner than 7 days after the assessment roll is completed and open for examination ("Open Book") under Wis. Stat. §70.45 (Wis. Stat. §70.47(1)). To preserve the right to object, the property owner must give the BOR clerk written or oral notice of intent to file an objection at least 48 hours before the board's first scheduled meeting, then file the written Objection Form for Real Property Assessment (Form PA-115A) with the clerk within the first 2 hours of that first meeting (Wis. Stat. §70.47(7)(a)). The board may waive the 48-hour notice for good cause shown during the first 2 hours of the session, or for proof of extraordinary circumstances through the 5th day of the session (Wis. Stat. §70.47(7)(a)) — but a property owner who is granted a hearing waiver loses the right to later appeal to the Department of Revenue or to file an excessive-assessment claim. The exact session start date is set by each individual municipality within the 45-day window, so there is no single statewide 2026 date.
2. File a objection: Contact your county's BOR or file online through your county's online portal.
3. Gather evidence: Market analysis, recent comparable sales, and documentation of property defects or errors.
4. Attend your hearing: Present your evidence to the Board of Review.
5. Escalate if needed: After the initial hearing, consider Municipal Board of Review (BOR) — the town, village, or city board hears the formal objection; the owner must give the clerk written or oral notice of intent to file at least 48 hours before the first scheduled meeting and file the written Objection Form (PA-115A for real property) within the first 2 hours of that meeting; the BOR meets during the 45-day period beginning the 4th Monday of April and may raise, lower, or sustain the assessment after hearing (Wis. Stat. §§70.47, 70.47(7), 70.47(9)(a)).