Wisconsin Property Tax Appeal Guide | Property Tax Edge
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Wisconsin

Midwest · 72 counties

Complete property tax appeal guide for Wisconsin homeowners — rates, deadlines, exemptions, and step-by-step appeal instructions.

Wisconsin Department of RevenueModerate to Appeal
1.32%
Effective Tax Rate
Rank #10 nationally
100%
Assessment Ratio
100% of full value
$266,500
Median Home Value
latest Census/ACS estimate
$3,792
Median Annual Tax
Per year
1

Open Book is informal — your objection must reach the Board of Review clerk 48 hours before its first meeting; don't wait for a formal notice

2

Homestead Credit up to $1,460 for income under $24,680

3

Among the highest effective tax rates in the US

Appeal Deadline

Notice of intent at least 48 hours before the Board of Review's first meeting, plus Form PA-115A within its first two hours

Open Book is NOT a filing deadline — it is an informal review period when the assessor can still change the roll. To preserve an appeal you must give the Board of Review clerk notice of intent to object, written or oral, at least 48 hours before the board's first scheduled meeting (§70.47(7)(a)), then file a completed, signed Objection Form PA-115A before or during the first two hours of that meeting. Object to the property's TOTAL value, not land and improvements separately. The board may waive the 48-hour notice for good cause, and under §70.47(3)(ak) may waive both requirements up to the end of the fifth day of the session on proof of extraordinary circumstances. The board meets in the 45-day period beginning the fourth Monday in April — April 27 to June 10, 2026 — but no sooner than 7 days after Open Book; exact dates are set locally.

Verified August 2026 against the official source · official source · always confirm the current date with your county

Understanding Wisconsin's Assessment Ratio

100%
100% of full value

Wisconsin assesses at 100% of market value, so your assessed value should equal what your property is worth on the open market.

This makes appeals straightforward: if comparable homes in your area sold for less than your assessed value, you have grounds for an appeal.

How to Appeal Your Property Tax in Wisconsin

1

Review your assessment during the Open Book period (informal — not a filing deadline)

2

Give the Board of Review clerk notice of intent to object at least 48 hours before its first meeting

3

File the signed Objection Form PA-115A before or during the first two hours of that meeting

4

Attend the Board of Review hearing and object to the TOTAL property value

5

Appeal to Circuit Court within 90 days of the Board decision

Appeal Body
Board of Review → Circuit Court → Court of Appeals

Exemptions & Relief Programs

Homestead Exemption
Homestead Credit: income-based credit up to $1,460 for income under $24,680
Senior / Disabled Exemption
Homestead Credit available to all qualifying homeowners regardless of age

Key Statutes & Legal References

§
Wis. Stat. §70.32 (100% full value)
§
Wis. Stat. §70.47 (Board of Review)
§
Wis. Stat. §70.48 (Circuit Court appeal)

Wisconsin Property Tax Code

Governing Code
Wisconsin Statutes — Chapter 70 (General Property Taxes)
Assessment Authority
Municipal Assessor
Appeal Board
Board of Review
Assessment Cycle
Annual

Key Statutes

Wis. Stat. §70.32
Assessment of Real Property
Requires assessment at 100% of fair market value.
Wis. Stat. §70.47
Board of Review
Establishes the municipal Board of Review for hearing assessment appeals.
Wis. Stat. §73.01
Tax Appeals Commission
Creates the Wisconsin Tax Appeals Commission for formal appeals.
Wis. Stat. §70.11
Exemptions
Lists all property exempt from general property taxation.

Major Exemptions

Lottery and Gaming Credit
Owner-occupied primary residence
Varies (based on school levy)
First Dollar Credit
All taxable real property
Varies
Veteran/Surviving Spouse
100% disabled veteran
Full exemption
Official Code

Wisconsin Appeal Tools

Use these tools to build your appeal case for Wisconsin:

Over-Assessment Calculator
County Appeal Guides
Jurisdiction Intelligence
CAD Interactive Map
Sales Comparables Tool
Deadline Manager

Quick Wisconsin Calculator

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Assessment ratio: 100% · Rate: 1.32%

Quick Links

Over-Assessment Calculator
Find a Consultant
Deadline Manager
Community Forum
Moderate to Appeal
High effective rate; the Board of Review process is unique and the 48-hour notice of intent is easy to miss

Taxing Authority

Local Assessor
Assessment Frequency
Annual

Ready to Appeal Your Wisconsin Property Tax?

Use our free tools to calculate your potential savings, find a local consultant, and manage your appeal deadlines.

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Wisconsin's assessment ratio study

How closely Wisconsin assessors' values actually track real sale prices — and whether you can use that in an appeal.

Applied directly in appealsLatest study: 2025

Equalized Values with per-municipality assessment ratios (Summary of Aggregate Ratios)

Your municipality's assessment ratio is printed on every Wisconsin tax bill — use it to convert assessed value to implied full value. If a 79% ratio implies a full value of $367,600 and your home is worth less, that supports both a §70.47 Board of Review objection and a later §74.37 excessive-assessment claim or §70.85 DOR revaluation request.

Official Wisconsin dataCompare all 50 states + DC

Supplemental, Escape & Corrected Bills in Wisconsin

Wisconsin sends no supplemental or prorated bills; the only surprise charges are omitted-property back taxes (reaching 2 prior years) folded into the current bill, and corrections of palpable errors. Homeowner remedies run through the Board of Review and the January 31 claim deadlines of Wis. Stat. 74.33/74.35/74.37.

Omitted Property Assessment

Real property omitted from assessment in either of the 2 previous years (and pre-2024 personal property similarly); assessor enters it on the current roll with a notation of the year omitted, and the back tax is collected with the current levy.

Appeal window: Contest at the Board of Review when the omitted assessment appears (file objection before/at the BOR session); afterwards, claims under 74.35 (unlawful tax) or 74.37 (excessive assessment) filed with the municipal clerk by January 31 of the year the tax is payable, then circuit court within 90 days of disallowance.

Correction of Errors / Palpable Error Adjustments

Assessor corrections in the succeeding year's assessment (70.43) and municipal correction of palpable errors discovered in the tax roll after taxes were extended (74.33) - double assessment, nonexistent property, exempt property taxed, etc.

Appeal window: Taxpayer-initiated relief mirrors the claim statutes: 74.33 requests to the governing body; refund/recovery claims under 74.35 or 74.37 due by January 31 of the year the contested tax is payable; suit within 90 days of the claim being disallowed.

Full details & sources →Got one of these bills? Track its deadline →
AI Evidence Packet · $49

Build your Wisconsin appeal evidence packet

Our AI assembles a professional evidence packet — cover letter, comparable-sales analysis, assessment ratio check, hearing script, and your state's filing instructions. $49 one-time, no subscription, no percentage of your savings. You file it with your county; we don't file or represent you.

We prepare the evidence — you submit it. The $49 is charged when the packet is generated, not when an appeal succeeds. See a sample packet.

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Wisconsin property tax appeals — frequently asked questions

When is the property tax appeal deadline in Wisconsin?+

In Wisconsin, the appeal window is Notice of intent at least 48 hours before the Board of Review's first meeting, plus Form PA-115A within its first two hours. Open Book is NOT a filing deadline — it is an informal review period when the assessor can still change the roll. To preserve an appeal you must give the Board of Review clerk notice of intent to object, written or oral, at least 48 hours before the board's first scheduled meeting (§70.47(7)(a)), then file a completed, signed Objection Form PA-115A before or during the first two hours of that meeting. Object to the property's TOTAL value, not land and improvements separately. The board may waive the 48-hour notice for good cause, and under §70.47(3)(ak) may waive both requirements up to the end of the fifth day of the session on proof of extraordinary circumstances. The board meets in the 45-day period beginning the fourth Monday in April — April 27 to June 10, 2026 — but no sooner than 7 days after Open Book; exact dates are set locally. Always confirm the exact date with your local local assessor or appeal board, as it can vary by county.

How do I appeal my property tax assessment in Wisconsin?+

The general process: 1) Review your assessment during the Open Book period (informal — not a filing deadline); 2) Give the Board of Review clerk notice of intent to object at least 48 hours before its first meeting; 3) File the signed Objection Form PA-115A before or during the first two hours of that meeting; 4) Attend the Board of Review hearing and object to the TOTAL property value; 5) Appeal to Circuit Court within 90 days of the Board decision. Appeals are heard by the Board of Review → Circuit Court → Court of Appeals.

What is the average property tax rate in Wisconsin?+

Wisconsin's effective property tax rate is about 1.32% of value — roughly $3,792 per year on the state's median home value of $266,500. Assessments are made at 100% of full value.

What exemptions can lower my property tax in Wisconsin?+

Common relief includes the homestead exemption (Homestead Credit: income-based credit up to $1,460 for income under $24,680) and senior relief (Homestead Credit available to all qualifying homeowners regardless of age). Eligibility and amounts vary — check with Wisconsin Department of Revenue.

Is it worth appealing my property taxes in Wisconsin?+

If your assessed value is higher than what your home would realistically sell for, an appeal can lower your bill — often for the life of the assessment. Use the free over-assessment calculator to estimate your potential savings before you file.