2026 fiscal calendar
Know the tax date before it becomes a penalty date.
Tax bills, payment rules, and valuation-review windows are controlled by the local jurisdiction and the governing state framework. The verified record below separates published figures from dates that require confirmation with Grant County Treasurer and Land Information/Real Property Listing; municipal assessors perform local valuation.
Effective rate
no single countywide effective rate is published; 2026 rates vary by municipality, school district, and other taxing districts.
Statement mailing
2026 property tax bills must be issued by December 21, 2026 (the third Monday in December) under Wis. Stat. §74.09(5); local municipal treasurers mail the bills.
Payment deadline
For 2026 taxes payable in 2027: first installment or full payment due January 31, 2027 to the treasurer named on the bill; second installment due July 31, 2027. Grant County states its online county portal handles current second installments due July 31 and delinquent taxes, while December/January payments are limited to listed municipalities and delinquent accounts.
Valuation protest
2026 appeal/protest dates are municipality-specific. Wisconsin DOR's 2026 Open Book/Board of Review calendar lists each municipality's dates; written or oral notice of intent to object is due at least 48 hours before the first Board of Review meeting, and PA-115A must be filed by the first two hours of that meeting.
Critical payment warning
Do not assume a grace period.
The verified county record identifies the payment timing above but does not establish a universal penalty schedule for this page. Late charges, interest, collection costs, tax-sale procedures, and lien or foreclosure timelines can depend on state law and the local collector’s process. If the deadline is close or a balance is delinquent, contact the tax collector directly and request the current payoff amount in writing.
Treat the published payment deadline as a hard operational date and retain your receipt or confirmation number.
Read the calendar in order
From assessment to collection
1. Valuation and notice
Review the assessment notice as soon as it arrives. The protest window may run from the notice date rather than from the payment due date.
2. Statement and account review
Match the tax statement to the parcel or account number and confirm exemptions, assessed value, taxing units, credits, and balance.
3. Payment confirmation
Use the official collector channel, then save the receipt, transaction reference, and date posted. A bank submission is not always the same as a county posting date.