Will County, Illinois · 2026 data · Effective rate ~2.10%
Will County Property Tax
Will County has an average effective property tax rate of approximately 2.10%, slightly above the Illinois state average. With median home value around $280,000, the typical Will County homeowner pays about $5,880 per year in property tax. Rates vary by township and school district.
Median Will County property tax
~$5,880 per year
On Will County median home value of ~$280,000 at 2.10% effective rate
Will County property tax by home value
| Home value | Annual tax | Monthly | First installment (Jun 1) |
|---|---|---|---|
| $150,000 | $3,150 | $263 | $1,575 |
| $200,000 | $4,200 | $350 | $2,100 |
| $250,000 | $5,250 | $438 | $2,625 |
| $300,000 | $6,300 | $525 | $3,150 |
| $400,000 | $8,400 | $700 | $4,200 |
| $500,000 | $10,500 | $875 | $5,250 |
Approximate. Actual property tax varies by township (Joliet, Plainfield, New Lenox, etc.), school district, and exemptions claimed.
Estimate
- Illinois tax bills combine many overlapping districts, and the composite rate differs by township and municipality within Will County.
- The table applies an estimated 2.1% average effective rate, taken from secondary sources rather than an official figure. Exemptions — homeowner, senior, senior freeze, veterans — materially reduce a bill and are not in it.
The county treasurer's bill and the assessor's valuation are authoritative. Appeal deadlines are short and are set by township.
Will County property tax lookup
To look up a specific property's tax:
- Visit the Will County Treasurer website: willcountyillinois.com
- Click "Property Tax Search" or "View Tax Bills"
- Enter your PIN (Property Index Number) OR street address
- View current bill, payment history, exemptions claimed, and assessment details
Your PIN appears on your tax bill or assessment notice. The format is XX-XX-XX-XXX-XXX (14 digits total). If you can't find it, the Supervisor of Assessments office at 815-740-4658 can look it up by address.
Will County exemptions to apply for
- General Homestead Exemption: up to -$8,000 EAV (saves $8,000 × your tax rate, e.g. $640 a year at 8%)
- Senior Citizens Homestead (age 65+): up to -$8,000 EAV more
- Senior Citizens Assessment Freeze: Freezes the assessment for household income of $75,000 or less (tax year 2026)
- Disabled Veterans' Standard Homestead: -$2,500 EAV at a 30-49% rating, -$5,000 at 50-69%, and the first $250,000 of EAV exempt at 70% or more
- Disabled Persons Homestead: -$2,000 EAV
- Returning Veterans Homestead: -$5,000 EAV for the tax year a veteran returns from active duty in an armed conflict and the year after
- Home Improvement Exemption: Up to $75,000 of value added by improvements exempt for 4 years
FAQs about Will County property taxes
What is the property tax rate in Will County?
Will County's average effective property tax rate is approximately 2.10%, slightly above the Illinois state average of 1.97%. Total millage varies by township and school district from about 7.5% to 12% of equalized assessed value (EAV), but EAV is roughly 33% of market value in Illinois, so effective rates work out to around 2%.
How do I look up my Will County property tax?
Use the Will County Treasurer's online property search at willcountyillinois.com (Treasurer section). You can look up by PIN (Property Index Number), address, or owner name. The portal shows current and past tax bills, payment status, and assessment information.
Which form do I use to appeal an assessment?
Assessment complaints go to the Will County Board of Review on the Board's own complaint form, available from the Supervisor of Assessments office or online. Deadlines vary by township, usually 30 days after the new assessments are published.
Does Will County offer a homestead exemption?
Yes. Because Will County borders Cook County, the General Homestead Exemption takes up to $8,000 off the equalized assessed value (EAV) of an owner-occupied home, and the Senior Citizens Homestead Exemption (age 65+) up to another $8,000. The Senior Citizens Assessment Freeze holds the assessment for seniors with household income of $75,000 or less (tax year 2026). Apply at the Will County Supervisor of Assessments office.
When are Will County property taxes due?
Property tax in Will County is paid in two installments. 1st installment due June 1. 2nd installment due September 1. Late penalty: 1.5% per month. The bill is for the prior year's tax (you pay in 2026 for 2025 taxes assessed in early 2025).
What towns are in Will County?
Largest: Joliet (county seat, pop. ~150K), Plainfield, Bolingbrook, Naperville (partly), Romeoville, New Lenox, Crest Hill, Lockport, Tinley Park (partly), Frankfort. Each has its own township and school district assessment, so property tax rates vary.
How do I appeal my Will County assessment?
(1) Receive your assessment notice (around January). (2) Request informal review at the Supervisor of Assessments office. (3) If unresolved, file a formal complaint with the Will County Board of Review. (4) Final appeal to the Illinois Property Tax Appeal Board (PTAB). Bring 3-5 recent comparable sales within your township.