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.
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: -$6,000 EAV (~$200/year savings)
- Senior Citizens Homestead (age 65+): -$5,000 EAV (~$165/year savings)
- Senior Citizens Assessment Freeze: Freezes assessment if income under threshold (~$65K limit, 2026)
- Disabled Veterans' Standard Homestead: $2,500-$10,000 EAV reduction based on disability rating
- Disabled Persons Homestead: -$2,000 EAV
- Returning Veterans Homestead: -$5,000 EAV one-time for veterans returning from active duty
- Home Improvement Exemption: Up to $25,000 in 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.
What's the Will County PTAX-300 form?
The PTAX-300 is the Property Tax Appeal Form used to file an assessment appeal with the Will County Board of Review. Available at the Supervisor of Assessments office or online. Deadlines vary by township, usually 30 days after publication of the new assessment notice.
Does Will County offer a homestead exemption?
Yes. The General Homestead Exemption reduces equalized assessed value (EAV) by $6,000 for owner-occupied residences. Senior Citizens Homestead Exemption (age 65+): additional $5,000. Senior Citizens Assessment Freeze (income limits apply): freezes assessment increases. 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 formal appeal with the Will County Board of Review using Form PTAX-300. (4) Final appeal to the Illinois Property Tax Appeal Board (PTAB). Bring 3-5 recent comparable sales within your township.