Calhoun County property tax appeal 2027: deadline, forms and how to file
To appeal a Calhoun County assessment, file with the Calhoun County Board of Review by mail or in person; in Illinois the deadline is 30 days after the township assessment list is published (Cook County uses township filing windows). Confirm the exact date on your notice or with the assessor; we add each county's 2027 date here when it is published.
Each county publishes its assessment list or changes in a local newspaper, township by township, on or before December 31 (35 ILCS 200/12-10). Dates vary by county.
Data as of 20 Oct 2026 · Calhoun County Board of ReviewCheck your own assessment
Free. We compare the value on your notice with recent sales of similar homes nearby and tell you whether an appeal is worth filing. Have your assessment notice and tax bill handy.
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How to file in Calhoun County
- Step 1
File the appeal
Use the method your notice lists, usually Form PTAX-230, by the deadline on the notice.
- Step 2 · before the hearing
Prepare and submit your evidence
Overvaluation must be shown by a preponderance of the evidence; a uniformity (equity) claim needs clear and convincing evidence. The strongest evidence is a recent arm’s-length purchase of your home, or an appraisal as of January 1. Otherwise use at least three comparable sales, or for equity at least three similar nearby homes with their assessments and property record cards, in a grid. Bring a photo of your home and its property record card.
- Step 3
Meet, then hear
An informal review with Township assessor or Supervisor of Assessments comes first; if you decline the offer, the Calhoun County Board of Review hears the case. Most reductions happen at the first step.
Before you file: how to read your notice · evidence that works · informal vs formal hearing · when not to appeal
Forms
| Form | Number | Use | Format |
|---|---|---|---|
| Board of Review Complaint - Non-Farm Property | PTAX-230 | Board of Review complaint for non-farm property (linked from the county Forms & Links page) | |
| Board of Review Complaint - Farm Land | PTAX-227 | Board of Review complaint for farmland (linked from the county Forms & Links page) | |
| Calhoun County Board of Review Official Rules | — | Board of Review rules (document is titled Official Rules 2024) | |
| Residential Appeal (Property Tax Appeal Board) | PTAB-1A | Only after the Board of Review decides: the state appeal, due 30 days after the board’s written notice. Can also be filed online through PTAB eFile. | Fillable PDF |
Appeal levels
| Level | Who hears it | Deadline | Cost |
|---|---|---|---|
| Informal review | Township assessor or Supervisor of Assessments | Before the Board of Review deadline | Free |
| Board of Review | Calhoun County Board of Review | 30 days after the assessment list is published | Free |
| Property Tax Appeal Board | Illinois Property Tax Appeal Board (state) | 30 days after the Board of Review’s written decision | No filing fee |
| Court | Circuit court (administrative review), or a tax objection in Calhoun County circuit court | 35 days after the PTAB decision; tax objections follow the tax-bill penalty date | Court costs |
What evidence the board accepts
Overvaluation must be shown by a preponderance of the evidence; a uniformity (equity) claim needs clear and convincing evidence. The strongest evidence is a recent arm’s-length purchase of your home, or an appraisal as of January 1. Otherwise use at least three comparable sales, or for equity at least three similar nearby homes with their assessments and property record cards, in a grid. Bring a photo of your home and its property record card.
Calhoun County questions
When is the Calhoun County appeal deadline for 2027?
No 2027 date is published yet. The board’s rule: Petition must be filed within 30 days after the Supervisor of Assessments publishes the assessment list in the newspaper, on the original prescribed form (not a faxed copy), with each copy carrying an original signature and all written and documentary evidence attached. After a tentative notice the owner has 5 days from the date on the notice to request a hearing.
How do I appeal my assessment in Calhoun County?
File the Board of Review Complaint - Non-Farm Property with the Calhoun County Board of Review, Clerk of the Board of Review (Supervisor of Assessments), 301 S County Road, P.O. Box 307, Hardin, IL 62047. Mailed complaints count as filed on the postmark date.
Should I talk to the assessor first?
Yes. The township assessor or the Calhoun County Supervisor of Assessments can fix record errors informally. Still file with the Calhoun County Board of Review by the deadline: a board complaint is required before any state appeal.
What evidence works best?
A recent arm’s-length purchase of your home or an appraisal as of January 1. Otherwise, at least three comparable sales, or three similar nearby homes with lower assessments, with property record cards and photos.
How do I contact the Calhoun County Supervisor of Assessments?
Mail: Clerk of the Board of Review (Supervisor of Assessments), 301 S County Road, P.O. Box 307, Hardin, IL 62047. Phone: 618-576-9700 x1. Hours and walk-in details: calhouncountyil.gov.
What if the Board of Review says no?
Appeal to the Illinois Property Tax Appeal Board within 30 days of the board’s written decision. There is no fee, and you can file online through PTAB eFile. A lowered value on an owner-occupied home carries over for the rest of the assessment period.
Check whether yours is over-assessed
Nearby counties
Jersey County · Greene County · Pike County · Scott County · Macoupin County · Morgan County · Madison County
- Calhoun County - Supervisor of Assessments
- Calhoun County - Board of Review
- Calhoun County - Supervisor of Assessments Forms & Links
- Calhoun County Board of Review Official Rules (PDF, scanned)
- Illinois State Board of Elections County Officers directory
- 35 ILCS 200/16-55 — Board of Review complaints
- 35 ILCS 200/12-10 — Publication of assessments
- 35 ILCS 200/16-160 — Appeal to the Property Tax Appeal Board
- Illinois DOR — Assessment Appeals
- Property Tax Appeal Board — Filing your appeal
- Property Tax Appeal Board — FAQ
- U.S. Census Bureau, county population estimates (2024) and county gazetteer (2024).