Property Tax for Illinois (2026)
Illinois (IL) Key Facts
Effective Property Tax Rate
2.27%
Tax Level
High compared to national average
Assessed By
County assessor
Payment Frequency
Varies by county (annual or semi-annual)
How This Calculator Works in Illinois
This calculator estimates your annual Illinois property tax based on your home's value and the state's average effective rate of 2.27%. Enter your property value to see your estimated annual tax bill.
Illinois Overview
Illinois has an effective property tax rate of 2.07%, above the national average of ~1.11%. A defining feature of the state's system is that second-highest in nation. Cook County uses triennial reassessment; equalizers adjust values, making it important for homeowners to understand local assessment practices and available exemptions.
How Illinois Compares
Illinois's property tax rate of 2.27% compares to Indiana at 0.85% and Wisconsin at 1.85%. The relatively high rate means property taxes are a significant expense for homeowners.
| State | Top Rate | Notes |
|---|---|---|
| Indiana | 0.85% | Indiana has a property tax rate of 0.85%. |
| Wisconsin | 1.85% | Wisconsin has a property tax rate of 1.85%. |
| Missouri | 0.97% | Missouri has a property tax rate of 0.97%. |
Illinois's property tax rate of 2.27% compares to a national average of approximately 1.11%. This is above the national average.
Tips for Illinois Residents
- 1Illinois's effective property tax rate of 2.07% is above the national average of ~1.11%. Key feature: second-highest in nation.
- 2Cook County uses triennial reassessment; equalizers adjust values. Always verify your assessed value matches your property's actual condition and features.
- 3Appeal your property tax assessment if comparable sales in your area suggest your home is overvalued — Illinois allows formal protests through the county or local assessor's office.
- 4Check whether you qualify for Illinois's homestead exemption or other relief programs (senior, disabled, veteran) — these can meaningfully reduce your annual tax bill.
- 5Illinois property taxes are deductible on your federal return subject to the $10,000 SALT cap. With a 2.07% rate, a $350,000 home owes roughly $7,245/year before exemptions.