Madison County Issues 2025 Property Tax Multiplier

Final equalization factor set at 1.0000 after public hearing

Published on Mar. 10, 2026

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The Illinois Department of Revenue has announced that Madison County has been issued a final property assessment equalization factor, or "multiplier", of 1.0000 for the 2025 tax year. The multiplier is used to achieve uniform property assessments across counties, which is important for taxing districts that span multiple counties.

Why it matters

The equalization factor is a key part of the property tax assessment process in Illinois, ensuring fairness and consistency across counties. While the multiplier itself does not directly impact total tax bills, it plays a crucial role in determining how the overall tax burden is distributed among individual property owners.

The details

The property assessment equalization factor, or "multiplier", is an annual calculation made by the Illinois Department of Revenue to align property assessments across the state's 102 counties. This is particularly important for taxing districts like school districts and fire protection districts that span multiple counties. The final 2025 multiplier for Madison County was set at 1.0000 after a public hearing, meaning assessments in the county are at 33.32% of market value based on recent sales data. Last year's multiplier was also 1.0000.

  • The final 2025 equalization factor was issued on March 10, 2026.
  • The tentative 2025 multiplier was announced on December 18, 2025.

The players

David Harris

Director of the Illinois Department of Revenue, the state agency responsible for issuing the annual property tax equalization factors.

Madison County

A county in Illinois that has been assigned a final property assessment equalization factor of 1.0000 for the 2025 tax year.

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What they’re saying

“The property assessment equalization factor, often called the "multiplier," is the method used to achieve uniform property assessments among counties, as required by law.”

— David Harris, Director, Illinois Department of Revenue (riverbender.com)

What’s next

The 2025 equalization factor will be used to calculate property tax bills that are payable in 2026.

The takeaway

The annual property tax equalization process in Illinois is an important mechanism to ensure fairness and consistency in how the overall tax burden is distributed, even as assessments and tax rates can vary across the state's many local taxing districts.