The Tax division of our office provides tax services including annually calculating the rate for various taxing districts by working with taxing authorities and the Board of Review. We make sure that the rates used in calculating taxes are within the legal limits established by law or the vote of the people.
The Clerk also collects all delinquent (past due) taxes from sold properties and issues tax deeds. The tax redemption area of our office computes and collects payments for past due or unpaid taxes. Call our tax line at (815) 319-4253 for questions or more information.
Sales Tax information from the Illinois Department of Revenue website
The 2024 Tax Extension was completed on April 3rd. Confirmation of the 1.0000 Final Multiplier was received from the IL Department of Revenue on March 27th. Certified Tax Computation Reports will be mailed to all taxing districts next week. Additional tax reports are posted below. Thank you.
New - the 2025 CPI (for taxes payable and collected in 2026) is posted below.
Tax Records
2025 CPI 2.9% (collected in 2026) & CPI History
2024 EAV Reports - All Districts
2024 Tax Computation Reports - FINAL 4-03-25
2024 PTELL Worksheets - FINAL 4-03-25
2024 District Rates by Tax Code
2024 Municipal & School District Tax Rates
2024 Highest & Lowest Tax Rates
2024 Tax District Listing by District Type
2024 Tax Extension Detail Report - All Districts
2024 Tax Extension Summary Report by Tax Code
2024 Tax Extension Summary Report by Township
2024 District Extension by Parcel & Classification
2024 Tax Code Detail within District
2024 Tax Code Value within District
2024 District Value within Tax Code
2024 Assessed Value by Tax Code within Tax District
2024 Taxable Assessed Valuations by Tax Body
2024 Exemptions Abstract by Township & Summary
2024 Township EAV within District Value
2024 Township Equalization Factors
2024 Top 25 Taxpayers - Winnebago County
2024 TIF District Tax Extension Reports
2024 TIF Tax Extension Detail Reports
2024 TIF Parcel Report by TIF District - includes Exempts
2024 TIF Parcel Extension by District
2024 TIF Loss in Extension by District
2024 Tax Extension Pie Chart Totals
2024 Enterprise Zone Abatement Report
2024 Enterprise Zone Abatement Report by District
2024 SSA Parcel Extension by District
2024 SSA Import Summary & District Detail
2024 Commercial & Industrial Abatements
2024 Housing Opportunity Tax Abatements
2024 Winnebago County Confirmation of Final Multiplier 3-27-25
2024 Revenue Recapture Credit Adjustment MEMO
2024 Revenue Recapture Certification - Totals by District 11-15-24
2024 Estimated EAV Reports - All Districts 7-23-24
2024 Winnebago County Confirmation of Tentative Multiplier 10-31-24
2024 Winnebago County Certification of Tentative Multiplier 10-01-24
2024 CPI 3.4% (collected in 2025) & CPI History
Truth in Taxation Certificate of Compliance
Winnebago County Taxing District Contact Info List - March 2025