Calhoun County Property Tax Appeal Guide
In Calhoun County, file your appeal by July 31, 2026 at Calhoun County Equalization Department's online portal.
| Deadline | Michigan assessment appeals run through the local March Board of Review FIRST, then the Michigan Tax Tribunal. The March Board of Review convenes the Tuesday following the first Monday in March (the second Monday in March, or the alternate Tuesday/Wednesday following it if the local unit adopts that ordinance) and must complete its review and deliver the assessment roll by the first Monday in April. A homeowner must protest the assessment before the March Board of Review before the Tax Tribunal can acquire jurisdiction over a residential dispute (MCL 205.735a(6)). After the Board of Review decides, the owner appeals to the Michigan Tax Tribunal by filing a written petition on or before July 31 of the tax year for residential (and agricultural / timber-cutover) real property; commercial real, industrial real, developmental real, and the listed personal-property classifications are due on or before May 31. Local Board of Review filing deadlines are set by each city/township and posted with the assessment-change notice; the City of Detroit set its 2026 March Board of Review petition deadline at 4:30 p.m. EST March 9, 2026. |
|---|---|
| Lien date | December 31, 2025 |
| Appeal body | March Board of Review (local), then the Michigan Tax Tribunal (March BOR / MTT) |
| Assessor / district | Calhoun County Equalization Department |
| Online portal | File online |
How to File a Appeal in Calhoun County
- Gather your assessment notice — it lists your account number and any access code
- File online through Calhoun County Equalization Department's portal or by mail
- State your grounds and submit evidence (comparable sales, a licensed appraisal, or photos of defects)
- Request an informal review to try to settle before a formal March BOR / MTT hearing