Who does these studies?

The official studies are done by the Illinois Department of Revenue. These are done by the county and by township when enough data is available. The Supervisor of Assessments Office also does studies to compare to the Department’s as well as more detailed studies of townships and property classes.

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1. What is an equalization factor (multiplier)?
2. Why does state law require equalization factors?
3. Who does these studies?
4. What information is used for these studies?
5. What years sales will be used for 2016 assessments?
6. What factors influence equalization factors (multipliers)?
7. What happens if township equalization factors (multipliers) are not applied at the county level?
8. Does an equalization factor automatically increase or decrease taxes?
9. Does an increase in equalization factor usually result in an increase in an individual’s tax bill?
10. How do I know if an equalization factor has been applied to my property?
11. Does farm land receive a multiplier based on sales of farm property?
12. If I have additional questions?