| DOR posts on website: Final Statement of Taxes (SOT) from prior year | | 5/28/2026 12:00 AM | 5/28/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-05-28.ics | 2286 |
| 2% fire dues normally paid to towns, village and cities end of May through August 1 | | 5/28/2026 12:00 AM | 5/28/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-05-28a.ics | 2287 |
| DOR deadline: Utility Company Asset Report (UT-144) e-file with DOR | | 6/1/2026 12:00 AM | 6/1/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-06-01.ics | 2289 |
| DOR deadline: Statement of Assessment e-file with DOR – 2nd Monday of June or after Board of Review (sec. 70.53) | | 6/8/2026 12:00 AM | 6/8/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-05-08.ics | 2290 |
| DOR deadline: Municipal Assessment Report (MAR) including net new construction, e-file with DOR (sec. 73.03(5)) | | 6/8/2026 12:00 AM | 6/8/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-06-08a.ics | 2291 |
| DOR posts on website: Video Service Provider Report (SL-311) (approx.) | | 6/11/2026 12:00 AM | 6/11/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-06-11.ics | 2292 |
| Deadline: Initial meeting of BOR held (45 days from 4th Monday in April) | | 6/11/2026 12:00 AM | 6/11/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-06-11a.ics | 2293 |
| DOR posts on website: Manufacturing full value rolls | | 6/12/2026 12:00 AM | 6/12/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-06-12.ics | 2294 |
| DOR mails: Manufacturing Full Value Assessment Notices to taxpayers and municipal clerks | | 6/12/2026 12:00 AM | 6/12/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-06-12a.ics | 2295 |
| Clerks review full value rolls for correct taxation district and taxing jurisdiction identification | | 6/12/2026 12:00 AM | 6/12/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-06-12b.ics | 2296 |
| DOR posts on website: Town, Village, and City Taxes Bulletin (approx.) | | 6/16/2026 12:00 AM | 6/16/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-06-16.ics | 2297 |
| Expiration of local cigarette, liquor and malt beverage operator licenses, except in first class cities (secs. 125.04, 125.51, 134.65) | | 6/30/2026 12:00 AM | 6/30/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-06-30.ics | 2298 |
| DOR deadline: (even years only) – Tax District Exemption Summary Report (PC-226) e-file with DOR (sec. 70.337(2)) | | 7/1/2026 12:00 AM | 7/1/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-07-01.ics | 2299 |
| DOR deadline: Tax Incremental District Annual Report (PE-300) e-file with DOR | | 7/1/2026 12:00 AM | 7/1/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-07-01a.ics | 2300 |
| DOR deadline: Maintenance of Effort Report (SL-305) e-file with DOR | | 7/1/2026 12:00 AM | 7/1/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-07-01b.ics | 2301 |
| DOT makes quarterly highway aids payments | | 7/1/2026 12:00 AM | 7/1/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-07-01c.ics | 2302 |
| DOR posts to website: First dollar credit settlement reports | | 7/27/2026 12:00 AM | 7/27/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-07-27.ics | 2303 |
| DOR distributes: Exempt computer aid (sec. 79.095(4)) | | 7/27/2026 12:00 AM | 7/27/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-07-27a.ics | 2304 |
| DOR distributes: 100% ERIP, 15% county and municipal aid, supplemental county and municipal aid, and utility (sec. 79.02(2)(b)) | | 7/27/2026 12:00 AM | 7/27/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-07-27b.ics | 2305 |
| DOR distributes: Video service provider aid (sec. 79.097(3)(b)) | | 7/27/2026 12:00 AM | 7/27/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-07-27c.ics | 2306 |
| DOR distributes: School levy tax credit (sec. 79.10(7m)) | | 7/27/2026 12:00 AM | 7/27/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-07-27d.ics | 2307 |
| DOR distributes: First dollar credit (sec. 79.10(7m)(c)) | | 7/27/2026 12:00 AM | 7/27/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-07-27e.ics | 2308 |
| DOR deadline: Municipalities with a population >25,000 and counties e-file Combined Annual Financial Report with DOR (sec.86.303(5)(g)) | | 7/31/2026 12:00 AM | 7/31/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-07-31.ics | 2309 |
| DOR deadline: Provide DOR with form and publication changes for 2026 | | 7/31/2026 12:00 AM | 7/31/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-07-31a.ics | 2310 |
| DOR deadline: Municipalities to review preliminary equalized, TID and net new construction values (Aug 1) | | 7/31/2026 12:00 AM | 7/31/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-07-31b.ics | 2311 |
| DOR releases: Preliminary equalized, TID, and net new construction values for review (Aug 1) | | 7/31/2026 12:00 AM | 7/31/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-07-31c.ics | 2312 |
| Deadline: Second installment of property taxes paid to treasurer (sec. 74.11(8)) | | 7/31/2026 12:00 AM | 7/31/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-07-31d.ics | 2313 |
| Deadline: 2% fire dues paid to towns villages and cities (Aug 1) | | 7/31/2026 12:00 AM | 7/31/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-07-31e.ics | 2314 |
| DOA releases preliminary population estimate | | 7/31/2026 12:00 AM | 7/31/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-07-31f.ics | 2315 |
| 2026 Annual Assessor Meeting announced | | 8/3/2026 12:00 AM | 8/3/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-08-03.ics | 2316 |
| DOR deadline: Notify DOR of potential errors in the preliminary equalized values, TID values, and net new construction values | | 8/7/2026 12:00 AM | 8/7/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-08-07.ics | 2317 |
| Last day of grace period for second installment of property taxes paid to treasurer (sec. 74.11(8)) | | 8/7/2026 12:00 AM | 8/7/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-08-07a.ics | 2318 |
| DOR posts on our website: 2027 personal property aid estimates | | 8/14/2026 12:00 AM | 8/14/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-08-14.ics | 2319 |
| DOR releases: 2026 certified equalized, Tax Incremental District and net new construction values (sec. 70.57(1)(a)) | | 8/14/2026 12:00 AM | 8/14/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-08-14a.ics | 2320 |
| Deadline: Towns, villages and cities that received direct payment of school levy tax and first dollar credits forward to county treasurer (sec. 79.10 (7m)(cm)1.b) | | 8/14/2026 12:00 AM | 8/14/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-08-14b.ics | 2321 |
| DOR deadline: Form SL-311 Video Service Provider Report e-file with DOR | | 8/17/2026 12:00 AM | 8/17/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-08-17.ics | 2322 |
| DOR deadline: County settles lottery and gaming credit special charges with DOR | | 8/20/2026 12:00 AM | 8/20/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-08-20.ics | 2323 |
| DOR posts on website: County and Municipal Certificates of Equalized Value (approx.) | | 8/20/2026 12:00 AM | 8/20/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-08-20a.ics | 2324 |
| Deadline: County settles school levy tax and first dollar credits with taxing jurisdictions (sec. 79.10 (7m)(cm)1.b) | | 8/20/2026 12:00 AM | 8/20/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-08-20b.ics | 2325 |
| DOA certifies state tax/charges to county clerk – 4th Monday (sec. 70.60(1)) | | 8/24/2026 12:00 AM | 8/24/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-08-24.ics | 2326 |
| DOR posts on website: County and Municipal Levy Limit Worksheets (SL-202c and SL-202m) (approx.) | | 9/4/2026 12:00 AM | 9/4/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-09-04.ics | 2327 |
| Legal Holiday: Labor Day (sec. 995.20) – State Offices Closed | | 9/7/2026 12:00 AM | 9/7/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-09-07.ics | 2379 |
| DOR posts on website: 2026 revised estimate and 2027 original estimate shared revenue notices (sec. 79.015) | | 9/15/2026 12:00 AM | 9/15/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-09-15.ics | 2328 |
| DOR updates and posts on website: Master List of Taxation Districts, Underlying Taxing Jurisdictions and Municipal Code Reports | | 9/18/2026 12:00 AM | 9/18/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-09-18.ics | 2329 |
| DOR posts on website: Municipal Debt Limit Report (approx.) | | 9/21/2026 12:00 AM | 9/21/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-09-21.ics | 2330 |
| DOR certifies: Percent change in Consumer Price Index (CPI) (sec. 79.05(2m)) (approx.) | | 9/30/2026 12:00 AM | 9/30/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-09-30.ics | 2331 |
| DOR deadline: Request for Chargeback of Refunded or Rescinded Taxes (PC-201) e-file with DOR (sec. 74.41(1)) | | 10/1/2026 12:00 AM | 10/1/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-10-01.ics | 2332 |
| DOR deadline: Request to Share Non-Manufacturing Omitted Taxes (PC-205) e-file with DOR (sec. 74.315) | | 10/1/2026 12:00 AM | 10/1/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-10-01a.ics | 2333 |
| DOR deadline: Late lottery and gaming credit application | | 10/1/2026 12:00 AM | 10/1/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-10-01b.ics | 2334 |
| DOR deadline: Lottery credit audit payment due (Admin 20.12(2)(a)(2)) | | 10/1/2026 12:00 AM | 10/1/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-10-01c.ics | 2335 |
| DOR: Sends exempt computer aid estimates and video service provider aid estimates | | 10/1/2026 12:00 AM | 10/1/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-10-01d.ics | 2336 |
| DOR: Certifies school district equalized values to DPI (sec.121.06m) | | 10/1/2026 12:00 AM | 10/1/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-10-01e.ics | 2337 |
| DOR: Certifies/posts on website technical college and special district equalized values (approx.) | | 10/1/2026 12:00 AM | 10/1/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-10-01f.ics | 2338 |
| DOR: Sends expenditure restraint budget limit notices to qualifying municipalities | | 10/1/2026 12:00 AM | 10/1/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-10-01g.ics | 2339 |
| DOR: Begins notifying municipalities of 2026 municipal fee for manufacturing assessment (sec. 70.995(14)) | | 10/1/2026 12:00 AM | 10/1/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-10-01h.ics | 2340 |
| DOR: Posts on website: Tax Incremental Certification Reports (approx.) | | 10/1/2026 12:00 AM | 10/1/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-10-01i.ics | 2341 |
| State Trust Fund notices mailed (during month of October) | | 10/1/2026 12:00 AM | 10/1/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-10-01j.ics | 2342 |
| DOR deadline: Final Municipal Assessment Report (MAR) e-file with DOR to be used for preliminary major class comparison | | 10/5/2026 12:00 AM | 10/5/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-10-05.ics | 2343 |
| DOR begins production of equated mfg. assessment rolls, omitted property rolls, correction of error rolls, and producing final Statements of Assessment (sec. 70.995 (08)) to post on website | | 10/5/2026 12:00 AM | 10/5/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-10-05a.ics | 2344 |
| DOT makes quarterly highway aids payments | | 10/5/2026 12:00 AM | 10/5/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-10-05b.ics | 2345 |
| DOR posts on website: Apportionment forms Special district (PC-505) | | 10/14/2026 12:00 AM | 10/14/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-10-14.ics | 2346 |
| DOR posts on website: Apportionment forms Technical college (PC-401V) | | 10/14/2026 12:00 AM | 10/14/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-10-14a.ics | 2347 |
| DOR posts on website: Apportionment forms State and county (PC-400) | | 10/14/2026 12:00 AM | 10/14/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-10-14b.ics | 2348 |
| DOR posts on website: Statistical Reports (sec. 73.06) (approx.) | | 10/26/2026 12:00 AM | 10/26/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-10-26.ics | 2349 |
| DOR posts on website: 2026 Preliminary Major Class Comparison (Nov 1) and sends 70.05 non-compliance notices to municipalities | | 10/30/2026 12:00 AM | 10/30/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-10-30.ics | 2350 |
| Deadline: Tech colleges certify levy to municipalities (sec. 38.16(1)) | | 10/30/2026 12:00 AM | 10/30/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-10-30a.ics | 2356 |
| DOR deadline: 2026 TID creations, territory amendments and base value redetermination documents and fees due to DOR | | 11/2/2026 12:00 AM | 11/2/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-11-02.ics | 2351 |
| DOR deadline: 2027 TID personal property base value adjustment requests due to DOR | | 11/2/2026 12:00 AM | 11/2/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-11-02a.ics | 2352 |
| DOR deadline: Tech college e-file Form PC-401V with DOR | | 11/2/2026 12:00 AM | 11/2/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-11-02b.ics | 2353 |
| Lottery and gaming credit special charges and non-primary resident reports sent to county treasurers and municipal clerks (tax 20.12(2)(a)2) | | 11/2/2026 12:00 AM | 11/2/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-11-02c.ics | 2354 |
| DOR distributes oil pipeline terminal property tax to municipalities (sec. 76.24(2)(am)) | | 11/2/2026 12:00 AM | 11/2/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-11-02d.ics | 2355 |
| Annual Assessor Meeting held November – specific dates to be announced | | 11/2/2026 12:00 AM | 11/2/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-11-02e.ics | 2357 |
| Deadline: Special districts certify tax levy to municipalities | | 11/2/2026 12:00 AM | 11/2/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-11-02f.ics | 2358 |
| DOR deadline: Municipal light, heat & power installment due to DOR (sec. 76.28(3)(c)) | | 11/10/2026 12:00 AM | 11/10/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-11-10.ics | 2359 |
| Deadline: School districts send certified school levy to municipal clerks (sec. 120.12 (3), Wis. Stats.) | | 11/10/2026 12:00 AM | 11/10/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-11-10a.ics | 2360 |
| DOR posts on website: Tax Increment Worksheet (PC-202) (approx.) | | 11/12/2026 12:00 AM | 11/12/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-11-12.ics | 2361 |
| DOR certifies: 74.41 chargebacks and 74.315 omitted taxes to municipalities and other taxing jurisdictions | | 11/13/2026 12:00 AM | 11/13/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-11-13.ics | 2362 |
| DOR deadline: State and County (PC-400) and Special District (PC-505) Apportionment Forms e-file with DOR | | 11/16/2026 12:00 AM | 11/16/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-11-16.ics | 2363 |
| DOR pays final shared revenue payments and sends notices to municipalities and counties | | 11/16/2026 12:00 AM | 11/16/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-11-16a.ics | 2364 |
| DOR sends and posts on website: Maximum credit value and maximum credit for lottery and gaming and first dollar credits (sec. 79.10 (2)) | | 11/20/2026 12:00 AM | 11/20/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-11-20.ics | 2365 |
| DOR sends and posts on website: School levy tax credit amount and estimated major state aids (full disclosure) | | 11/20/2026 12:00 AM | 11/20/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-11-20a.ics | 2366 |
| DOR posts on website: Statement of Taxes (PA-632a) (approx.) | | 11/23/2026 12:00 AM | 11/23/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-11-23.ics | 2367 |
| Legal Holiday: Thanksgiving (sec. 995.20) – State Offices Closed | | 11/26/2026 12:00 AM | 11/26/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-11-26.ics | 2380 |
| DOR notifies municipal clerk if Final Municipal Assessment Report (MAR) is not filed | | 12/1/2026 12:00 AM | 12/1/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-12-01.ics | 2368 |
| DOR posts on website: Debt Margin Report | | 12/11/2026 12:00 AM | 12/11/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-12-11.ics | 2369 |
| DOR deadline: County and Municipal Levy Limit Worksheet e-file with DOR | | 12/15/2026 12:00 AM | 12/15/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-12-15.ics | 2370 |
| DOR posts on website: Updated Manufactured/Mobile Home publication for Lottery and Gaming Credit (Prop 076) (approx.) | | 12/16/2026 12:00 AM | 12/16/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-12-16.ics | 2371 |
| DOR posts on website: 2027 Calendar (approx.) | | 12/16/2026 12:00 AM | 12/16/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-12-16a.ics | 2372 |
| DOR deadline: Statement of Taxes filed with DOR (sec. 69.61) | | 12/21/2026 12:00 AM | 12/21/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-12-21.ics | 2373 |
| DOR deadline: Tax Increment Worksheet e-file with DOR | | 12/21/2026 12:00 AM | 12/21/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-12-21a.ics | 2374 |
| Deadline: Issue property tax bills 74.09(5) | | 12/21/2026 12:00 AM | 12/21/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-12-21b.ics | 2375 |
| Deadline: Tax district clerk delivers roll to refund excess escrow amount within 15 days | | 12/21/2026 12:00 AM | 12/21/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-12-21c.ics | 2376 |
| Legal Holiday: Christmas Eve – State Offices Closed | | 12/24/2026 12:00 AM | 12/24/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-12-24.ics | 2381 |
| Legal Holiday: Christmas Day (sec. 995.20) – State Offices Closed | | 12/25/2026 12:00 AM | 12/25/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-12-25.ics | 2382 |
| DOR deadline: Final or Amended Municipal Assessment Reports (MAR) e-file with DOR | | 12/30/2026 12:00 AM | 12/30/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-12-30.ics | 2377 |
| DOR deadline: 2026 Tax Incremental District project and allocation amendment documents due to DOR | | 12/30/2026 12:00 AM | 12/30/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-12-30a.ics | 2378 |
| Legal Holiday: New Year’s Eve – State Offices Closed | | 12/31/2026 12:00 AM | 12/31/2026 11:59 PM | | Yes | https://www.revenue.wi.gov/EventDownloads/Governments/2026-12-31.ics | 2383 |