Estimates for planning, not a tax bill or tax advice. County Property Tax is an independent reference site. We are not a county assessor, appraisal district, treasurer, tax collector or state revenue department, we cannot change your assessment or bill, and we do not file exemptions or appeals for anyone.
How the estimates work
Each county calculator multiplies the value you enter by the county's assessment ratio (and, in Cook County, the Illinois equalization factor), subtracts the exemptions you tick for each taxing unit that grants them, and applies the adopted tax rates for the area you pick. Rates, ratios and exemption amounts come from the county or state office named next to them, with the tax year. Your real bill can differ because of special assessments and fees, partial-year exemptions, assessment caps that depend on your property's history, tax ceilings and freezes, rounding by the tax office, and taxing units that only cover part of a city.
Rates change every year
Local governments adopt new rates each year, usually in late summer or fall, and assessors send new values each spring. We show the latest adopted rates we could confirm from an official source and label the year. When a newer year is published we update the page and its date.
Deadlines and exemptions
Due dates, exemption amounts, eligibility rules and appeal deadlines are summarized from the county or state office and linked. Offices sometimes move dates (for example, when bills are delayed). Always confirm a deadline on your notice or with the office before you rely on it.
No paid relationships
We carry no affiliate links and are not paid by tax consultants, appeal firms, lenders, realtors or any government office. The site may be supported by display advertising; advertisers have no say over our data or pages.
Corrections
If you find an error, tell us through the contact page. We fix mistakes and note material changes on the page.