Dane County WI Property Tax: Board of Review Appeals (2026)
Researched from official Dane County sources · Updated August 2026
You already have the deadline and the forms. The part you can't look up is whether your own assessment would actually hold up — this checks it against real comparable sales and shows you the dollar gap, in about two minutes.
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Dane County doesn't run a single, countywide property tax appeal — each of its cities, villages, and towns assesses and hears appeals separately, through the same two-step process state law requires everywhere in Wisconsin: an informal Open Book period, then a formal written objection to that municipality's Board of Review on Wisconsin's Form PA-115A. In Madison, the county's largest city, the 2026 Open Book ran May 4–8 and the formal objection deadline was Friday, May 15 at 4:30 p.m., ahead of Board of Review meetings that started May 18 — dates the city sets fresh every year. Wisconsin law requires every municipal Board of Review to convene sometime in the 45-day window beginning the 4th Monday of April, so exact dates vary town to town and city to city across the county. Property taxes themselves are billed on a shared calendar: the first installment is due January 31 to your local municipal treasurer, with any second installment due July 31 to the Dane County Treasurer — except Madison, which offers its own multi-installment schedule through July 31.
How assessments work in Dane County
Wisconsin assessors work at the municipal level — Dane County itself has no assessor's office setting individual property values. Instead, the Wisconsin Department of Revenue calculates an Equalized Value for each municipality every year, released countywide and publicly each August 15, which places every municipality's locally assessed values on a common basis for apportioning county, school, and technical college taxes fairly. Your assessed value — the figure that actually drives your individual bill — is set by your own city, village, or town assessor using market sales, cost, and income approaches, per Wisconsin DOR guidance for property owners.
Madison's own process starts with a Board of Assessors review of objections (the city's population lets it use this intermediate body under state law) before a case ever reaches the formal municipal Board of Review — a quasi-judicial panel of appointed city residents that meets mid-summer through early fall. Commercial-property objections in Madison require additional documentation: income/expense statements, a gross rent statement for 2–7 unit properties, and a commercial sales questionnaire for anything acquired in the prior year.
Before you read another page of forms and filing rules, find out if there's actually a gap between your assessment and what comparable homes sold for. Two minutes, and you'll know whether the rest of this guide is worth your time.
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Whether you should appeal
The question is whether your municipality's assessed value holds up against what truly comparable properties near you sold for as of the assessment date. If it doesn't, gather the comparable sales, and either resolve the discrepancy informally during Open Book — often the fastest path, since it's a direct conversation with the assessor before any formal filing — or move to a written PA-115A objection if Open Book doesn't fix it.
Timing matters more in Wisconsin than in most states: to preserve your right to object, you generally must give the Board of Review clerk written or oral notice of intent to object at least 48 hours before the board's first scheduled meeting, then file the completed PA-115A objection form within the first two hours of that first meeting — Madison's own process (a fixed written deadline ahead of the Board of Assessors, rather than the 48-hour/2-hour default) is a city-specific variant, so always confirm your own municipality's exact procedure with its clerk or assessor before the season opens.
Step-by-step how to file
1. Find your municipal assessor. Dane County has dozens of separate assessing units; look up your city, village, or town assessor directly — Madison residents use the City Assessor's Office.
2. Use Open Book first. This is an informal review of your property record — room counts, permits, and other factual details — where many disputes get resolved before a formal filing is ever needed. Madison's 2026 Open Book ran May 4–8; other municipalities set their own dates within the state's assessment-roll timeline.
3. Give timely notice of intent to object, if your municipality follows the standard 48-hour rule.
4. File Form PA-115A, the Objection to Real Property Assessment, with your municipal clerk by your unit's deadline — in Madison, 4:30 p.m. on the fixed date the city sets each spring (May 15 in 2026).
5. Attend your Board of Review (or Board of Assessors, in cities that use one). Bring your comparable sales, appraisal, or other evidence; commercial owners should bring income/expense documentation.
6. Missed your deadline? Most municipalities allow a waiver request at one of the Board of Review's first several meetings — Madison grants it automatically at the first meeting and requires "extraordinary circumstances" at the second through fifth.
7. Still disagree after the Board of Review? Wisconsin property owners can seek further review through certiorari action in circuit court, or, for manufacturing property specifically, through the state's separate Board of Assessors process administered by the Department of Revenue.
Credits and relief programs
Lottery and Gaming Credit. A direct, dollar-for-dollar reduction on the property tax bill for Wisconsin residents who own and occupy a dwelling as their primary residence as of the January 1 certification date — it doesn't apply to rentals, vacant land, or business property, and only one credit is allowed per primary residence. It isn't automatic: apply through your county or municipal treasurer, generally by January 31 after you receive your tax bill (a late-application window runs through October 1). The credit amount is recalculated each year from a state-set maximum credit value multiplied by your property's school tax rate.
Homestead Credit. A separate, income-based credit claimed on your Wisconsin income tax return (Schedule H or H-EZ) rather than applied to the property tax bill directly — available to lower-income homeowners and renters. Check current-year income limits and the maximum credit directly with the Wisconsin Department of Revenue, since both are indexed and change annually.
When are property taxes due?
Most of Dane County follows a two-installment schedule: January 31 to your local municipal treasurer, and July 31 to the Dane County Treasurer for any remaining balance. The City of Madison instead offers a four-installment option (January 31, March 31, May 31, and July 31) alongside the option to pay in full by January 31. Missed installments become due in full immediately, with a combined monthly interest and penalty of 1.5% of the unpaid principal added starting February 1.
Contacts
- City of Madison Assessor's Office: City-County Building, 210 Martin Luther King Jr. Blvd., Room 103, Madison, WI 53703 · 608-266-4531 · assessor@cityofmadison.com
- Dane County Treasurer: City-County Building, 210 Martin Luther King Jr. Blvd. #114, Madison, WI · treasurer.danecounty.gov
- Wisconsin Department of Revenue — property assessment guidance: revenue.wi.gov
- For other Dane County municipalities, contact your own city, village, or town assessor and treasurer directly — Dane County itself does not set individual assessments.
Dane County appeal FAQs
Who assesses my property in Dane County?
Your own city, village, or town — Dane County has no countywide assessor. The Wisconsin Department of Revenue separately calculates an Equalized Value for each municipality each year, released August 15, but that figure doesn't replace your local assessed value.
What is the Dane County property tax appeal deadline?
There isn't a single countywide deadline — each municipality sets its own within the state's rule that every Board of Review must meet sometime in the 45-day window starting the 4th Monday of April. Madison's 2026 formal objection deadline was May 15 at 4:30 p.m., ahead of Open Book (May 4–8) and Board of Review meetings starting May 18; confirm your own municipality's dates with its clerk or assessor.
What is Open Book in Wisconsin?
An informal review period before the formal appeal process, where you can discuss your assessment and correct factual record errors directly with your local assessor — often resolving a dispute before any written objection is needed.
What form do I use to formally object to my Dane County assessment?
Form PA-115A, Objection to Real Property Assessment, filed with your municipal Board of Review clerk. Under the state's default rule, you must give notice of intent to object at least 48 hours before the board's first meeting and file the written form within the first two hours of that meeting; some cities, including Madison, use a different fixed deadline instead.
What if I miss my Board of Review objection deadline?
Most municipalities let you request a waiver at one of the board's first several meetings. Madison grants the waiver automatically at its first meeting of the season; from the second through fifth meetings, you must show extraordinary circumstances.
What is the Wisconsin Lottery and Gaming Credit?
A direct credit on your property tax bill for Wisconsin residents who own and occupy a dwelling as their primary residence as of the January 1 certification date. It is not automatic — apply through your county or municipal treasurer, generally by January 31 after receiving your bill, with a late window through October 1.
Is there an income-based property tax credit in Wisconsin?
Yes, the Homestead Credit, claimed on your Wisconsin income tax return (Schedule H or H-EZ) rather than applied directly to your property tax bill. Income limits and the maximum credit are set by the Department of Revenue and change annually.
When are Dane County property taxes due?
Most of the county pays the first installment by January 31 to the local municipal treasurer and any remaining balance by July 31 to the Dane County Treasurer. Madison offers a four-installment option (Jan. 31, Mar. 31, May 31, July 31) or payment in full by January 31.
You already have the deadline and the forms. The part you can't look up is whether your own assessment would actually hold up — this checks it against real comparable sales and shows you the dollar gap, in about two minutes.
Free · no account · we never sell your address
This guide is researched from public sources and updated periodically; deadlines and procedures can change — always confirm with the county before filing. Grove Hopper is a research tool, not a law firm or tax advisor.