Rate Breakdown

Property taxes in Clark County are calculated by multiplying the assessed value (minus exemptions) by the total local millage rate.

How Property Tax Works in Clark County

Property tax in Clark County follows a straightforward assessment cycle that begins each July. The County Assessor’s Office evaluates all real estate within the county, determining the “market value” of each property on July 1. This value is then multiplied by the county’s millage rate—expressed in mills, or thousandths of a dollar per dollar of assessed value—to calculate the annual tax bill. The current combined millage rate, comprised of the county, township, schools, and any special districts, is published each year and can be accessed through the Clark County Treasurer’s website. Because the assessed value is used for the entire year, any major changes in property condition or market conditions are not reflected until the next assessment cycle.

Available Exemptions

Illinois offers several exemptions that Clark County residents can apply for to reduce their taxable base. Eligible taxpayers should submit a completed exemption request form through the county’s online portal or in person at the Treasurer’s office.

• Homestead Exemption: Homeowners can receive a standard exemption equal to a predetermined percentage of their property’s assessed value, reducing the taxable amount by a fixed number of mills.
• Senior Citizen Exemption: Seniors aged 65 or older with a primary residence in the county qualify for a higher exemption amount, provided they meet income thresholds.
• Disability Exemption: Individuals with a documented disability that limits income or ability to maintain a home may receive an exemption equal to the amount of their disabled veteran or blindness disability deduction.
• Veteran Exemption: Full‑time veterans and surviving spouses may apply for a standard exemption, while honorably discharged veterans with service‑connected disabilities may qualify for an additional exemption.

Payment Schedule & Deadlines

Clark County taxes are due twice a year. The first installment—covering the period from July 1 to December 31—must be paid by September 30. The second installment—covering January 1 to June 30—must be paid by September 30 of the following year. Property taxes may be paid in full, or borrowers can opt for an installment plan that allows payments in four equal quarterly installments, as long as each installment is made on or before the due date.

Failure to meet the deadline results in a 1% late payment surcharge, plus potential penalty interests that compound annually. A delinquent account will receive a notice of default after the second installment is unpaid, eventually leading to a lien sale or property tax foreclosure if the balance remains unpaid.

Appealing Your Assessment

Residents who believe their assessment is inaccurate may file an appeal with the Clark County Assessors' Office. The procedure consists of the following steps:

• Submit Your Claim: Complete the online appeal form or submit a hard copy by mail. Include supporting evidence such as recent appraisal reports, photographs, or market sales data.
• Review & Hearing: The assessor will review the claim and, if necessary, schedule a formal hearing where you can present evidence and argue your case.
• Decision: The appraisal board will issue a written decision. If the appeal is denied, you may request a final review by the Illinois Department of Local Government Finance within 30 days.
• Timeline: Appeals must be filed within 60 days of receiving the assessment notice to ensure timely consideration.

By understanding the assessment process, exemptions, payment schedule, and appeals pathway, Clark County residents can navigate their property tax obligations with confidence and precision.