Illinois property tax
Official source data 2024
On a $400,000 home in Illinois
$8,049
estimated annual property tax
ACS 2020-2024 ratio of medians. This estimate does not use your parcel’s assessment or district tax rates.
Make it your number.
Your actual bill depends on your local assessment, exemptions, and taxing districts.
A home value. A yearly budget.
These scenarios use the same 2.01% effective rate. They do not predict an individual tax assessment.
| Home value | Annual estimate | Monthly budget |
|---|---|---|
| $100,000 | $2,012 | $168 |
| $150,000 | $3,018 | $252 |
| $200,000 | $4,024 | $335 |
| $250,000 | $5,030 | $419 |
| $300,000 | $6,036 | $503 |
| $350,000 | $7,043 | $587 |
| $400,000 | $8,049 | $671 |
| $450,000 | $9,055 | $755 |
| $500,000 | $10,061 | $838 |
| $600,000 | $12,073 | $1,006 |
| $750,000 | $15,091 | $1,258 |
| $1,000,000 | $20,122 | $1,677 |
| $1,250,000 | $25,152 | $2,096 |
| $1,500,000 | $30,182 | $2,515 |
| $1,750,000 | $35,213 | $2,934 |
| $2,000,000 | $40,243 | $3,354 |
Property tax by county.
102 counties and county equivalents in Illinois. Median taxes and values come from ACS 2024.
| County | Effective rate | Median tax paid | Your value estimate |
|---|---|---|---|
| Cook County | 1.91% | $6,191 | $7,631 |
| DuPage County | 2.05% | $8,007 | $8,183 |
| Lake County | 2.58% | $8,923 | $10,325 |
| Will County | 2.24% | $7,173 | $8,977 |
| Kane County | 2.26% | $7,382 | $9,030 |
| McHenry County | 2.36% | $7,274 | $9,444 |
| Winnebago County | 2.39% | $3,930 | $9,556 |
| Madison County | 1.92% | $3,319 | $7,674 |
| St. Clair County | 2.03% | $3,665 | $8,131 |
| Champaign County | 2.06% | $4,353 | $8,233 |
| Sangamon County | 1.99% | $3,512 | $7,968 |
| Peoria County | 2.24% | $3,552 | $8,964 |
| McLean County | 2.17% | $4,524 | $8,683 |
| Rock Island County | 2.28% | $3,425 | $9,109 |
| Kendall County | 2.37% | $7,651 | $9,493 |
| Tazewell County | 2.11% | $3,536 | $8,444 |
| LaSalle County | 2.11% | $3,418 | $8,445 |
| Kankakee County | 2.21% | $4,266 | $8,860 |
| Macon County | 2.12% | $2,696 | $8,471 |
| DeKalb County | 2.45% | $5,974 | $9,810 |
| Vermilion County | 1.81% | $1,757 | $7,230 |
| Williamson County | 1.72% | $2,690 | $6,880 |
| Adams County | 1.58% | $2,573 | $6,330 |
| Whiteside County | 2.04% | $2,598 | $8,176 |
| Boone County | 2.18% | $4,735 | $8,732 |
What can change your bill?
The ACS effective rate is a ratio of medians, not a statutory rate. Local assessed values, levies, classification, caps and exemptions determine the actual bill.
Exemptions & assessment
General homestead maximum is $6,000 outside Cook and its contiguous counties; contiguous counties use $8,000 and Cook $10,000. Assessment and equalization rules differ. This editable example uses $6,000.
Payment dates & appeals
Many counties use June 1 and September 1 installments; accelerated and late-billing schedules differ. Cook's usual first installment is March 1, and its second date is set locally. Confirm the county collector's bill.
A written complaint goes to the county Board of Review. Many filing periods run 30 days after assessment-list publication, while Cook uses its own township schedule. Ask the board for the specific deadline.
Check Illinois’s official property-tax guidance
Use an assessed value, exemption, and local millage
This separate scenario needs your assessor’s inputs. An exemption applies only to eligible levies; do not apply it to the county’s historical effective rate.
Good questions. Clear answers.
How much is property tax on a $400,000 home in Illinois?
The historical effective-rate estimate is $8,049 per year, or $671 a month. It multiplies $400,000 by 2.01%.
Is the effective rate the rate on my tax bill?
No. It is median real-estate taxes paid divided by median home value in the ACS 2020-2024 survey. Your taxing districts, assessed value, classification and exemptions determine your bill.
Can I subtract a homestead exemption from this estimate?
Use the separate statutory scenario with a qualifying levy. Subtracting an exemption from an ACS effective-rate estimate can double-count relief already reflected in taxes paid.
Does a higher purchase price change my assessment?
Assessment rules and reassessment dates vary by state and locality. Contact the linked official property-tax office before relying on a historical county ratio.
How do I appeal a property-tax assessment?
Read the deadline and procedure on your assessment notice, then use the official state guidance above to locate your assessor or review board. County survey data does not establish your appeal deadline.
Check the source.
Data as of 2024. Retrieved .
- www2.census.gov / Geos20245YR.txt
- www.census.gov / notes-on-acs-estimate-and-annotation-values.html
- www2.census.gov / acsdt5y2024-b01003.dat
- www2.census.gov / acsdt5y2024-b25077.dat
- www2.census.gov / acsdt5y2024-b25103.dat
- www2.census.gov / acsdt5y2024-b25064.dat
- www2.census.gov / acsdt5y2024-b19013.dat
- tax.illinois.gov / taxrelief.html As of 2026-10-02
- tax.illinois.gov / answer.695.html As of 2026-10-02
- tax.illinois.gov / answer.334.html As of 2026-10-02
- tax.illinois.gov / publication_of_factors.pdf As of 2026-10-02