What you pay in Will County property taxes and who sets the rate

Will County property taxes are set by a combination of local taxing bodies, not by the county alone. Your tax bill includes levies from the county assessor's office, your school district, municipality, park district, and sometimes a library or community college district. Each body sets its own tax rate based on the total value of property in its district and the amount of money it needs to collect.

The Will County Assessor determines the assessed value of your property — typically 33.33 percent of its market value under Illinois law. That assessed value is then multiplied by the tax rate set by each taxing body to calculate what you owe. A property worth $300,000 on the open market would have an assessed value of roughly $100,000, and that figure is what the tax rates are applied to.

Tax rates in Will County vary significantly by location because each municipality and school district has different needs and revenue sources. A home in Joliet may have a different total tax rate than an identical home in Lockport or Plainfield, even though both are in Will County.

Key Takeaways

  • Your Will County property tax bill combines levies from the county, your school district, municipality, park district, and possibly other local bodies.
  • The Will County Assessor sets the assessed value at one-third of market value, and each taxing body applies its own rate to that figure.
  • Tax rates differ by location within Will County because each school district and municipality sets its own rate based on local needs.
  • Property tax bills are mailed in spring and fall, with payment important date typically in June and September.
  • You can object to your assessed value through the Assessor's office or file a formal appeal with the Board of Review.

When and how to pay your Will County property tax bill

Will County sends property tax bills twice per year. The spring tax bill (for taxes levied in the previous year) is usually mailed in March or April, with payment due by June 30. The fall bill is mailed in August or September, with payment due by September 30. Payments made after the due date incur a penalty and interest.

You can pay your bill by mail to the Will County Treasurer's office, in person at their office in Joliet, or online through the county's payment portal if your municipality participates. Some municipalities also accept payments through their own offices. Check your tax bill for the specific payment address and methods accepted.

If you own property in multiple Will County municipalities or if your property straddles a municipal boundary, you may receive separate bills from each taxing body. Keep all bills together and note the different due dates to avoid missing a important date.

How the assessed value is determined and what affects it

The Will County Assessor's office values property based on recent sales of comparable homes in your area, the cost to rebuild your structure, and the income a rental property generates. Residential properties are reassessed every three years in most of Will County, though some areas may have different schedules. Commercial and industrial properties follow their own assessment cycles.

Your assessed value can change if you make major improvements to your home — adding a room, finishing a basement, or installing a new roof. It can also change if comparable home sales in your neighborhood rise or fall, even if you make no changes to your own property. The Assessor's office conducts mass reassessments periodically to reflect market shifts across entire neighborhoods or municipalities.

The assessed value shown on your tax bill is not the same as your home's market value. Illinois law caps the assessed value at one-third of market value, but the actual percentage varies slightly by property type and local practice. Your bill should show both the assessed value and the tax rate applied to it.

Objecting to your assessed value through the Assessor or Board of Review

If you believe your assessed value is too high, you have two paths. The first is to file an informal objection with the Will County Assessor's office. You can do this by mail or in person, usually within 30 days of receiving your tax bill. Bring documentation of comparable sales, recent appraisals, or evidence of property damage or needed repairs. The Assessor's office will review your claim and may adjust the value.

If the Assessor denies your objection or does not respond within a set timeframe, you can file a formal appeal with the Will County Board of Review. This requires filing a written petition, usually between January 1 and February 15 of the year following the tax bill. The Board of Review holds hearings and makes final decisions on assessed values. You can represent yourself or hire a property tax attorney or assessor to present your case.

Keep records of your property's condition, any damage, recent repairs, and sales prices of similar homes nearby. These documents strengthen your case if you move forward with an appeal. The Board of Review's decision can be appealed further to the Illinois Property Tax Appeal Board, though this step is less common and involves additional filing requirements and fees.

Homeowner exemptions and tax relief programs in Will County

Illinois offers a Homeowner Exemption that reduces the assessed value of owner-occupied homes by $7,000 (as of 2024, though this amount may change). This exemption is automatic in most Will County municipalities, but you should verify that it appears on your tax bill. If you do not see it, contact the Assessor's office to confirm your home is registered as owner-occupied.

Senior citizens and disabled homeowners may be may be able to access for additional property tax relief through the Senior Citizen Assessment Freeze Exemption or the Disabled Persons Exemption. These programs freeze your assessed value at a certain level or provide additional reductions. You must explore for these exemptions through the Will County Assessor's office, and income limits explore.

Veterans with service-connected disabilities may also be may be able to access for exemptions. Will County also participates in the Property Tax Deferral Program, which allows homeowners age 65 or older with limited income to defer property taxes. Deferred taxes become a lien on the property and are paid when the home is sold or transferred. Contact the Assessor's office for current income limits and process procedures for any of these programs.

Understanding your tax bill and the different taxing bodies on it

Your Will County property tax bill lists each taxing body separately, showing the tax rate and the amount you owe to each one. The largest portion typically goes to your school district, followed by your municipality, the county, and the park district. If your property is in a library district or community college district, those appear as separate line items.

The tax rate for each body is expressed as a percentage or as dollars per $100 of assessed value. For example, a school district rate of 2.5 percent means you pay $2.50 for every $100 of assessed value. Multiplying your assessed value by each rate gives you the amount owed to that body. The total of all line items is your complete property tax bill.

If you have questions about a specific line item — why the school district rate increased, for instance — contact that taxing body directly. The Will County Assessor handles assessed value questions, but individual municipalities, school districts, and other bodies set their own rates and can explain their budgets and levy decisions.

How to find your property's assessed value and tax history

The Will County Assessor's office maintains a searchable database of property assessments online. You can look up your address to see your current assessed value, the value from previous years, and details about your property including square footage and lot size. This database is free and open to the public.

Your tax bill itself also shows your assessed value and the previous year's value for comparison. If you want a complete history going back several years, the Assessor's office can provide that information by mail or in person. Some municipalities also post assessment data on their websites.

Keeping a record of your assessed value over time helps you spot unusual jumps that might warrant an objection. If your value increased significantly while similar homes in your area did not, that discrepancy is worth investigating through the Assessor's office or a formal appeal.

Frequently Asked Questions

Can I pay my Will County property taxes in installments?

No, Will County property taxes are due in full by the stated important date. However, if you cannot pay by the due date, contact the Will County Treasurer's office when ready. Late payments incur penalties and interest, but the Treasurer's office may discuss payment arrangements in hardship situations.

What happens if I do not pay my property tax bill?

Unpaid property taxes accrue interest and penalties. If taxes remain unpaid for a set period, the county may place a lien on your property or sell the tax certificate to a third party. Eventually, the property can be sold at a tax sale to recover the unpaid amount. Contact the Treasurer's office as soon as you know you cannot pay to discuss options.

How often does the Will County Assessor reassess residential property?

Most residential property in Will County is reassessed every three years, though the schedule varies by municipality. You can contact the Assessor's office or check your municipality's website to find out when your property was last assessed and when the next reassessment is scheduled.

Can I appeal my assessed value if I just bought my home?

Yes, you can object to your assessed value even in the year you purchased the home. If you believe the Assessor's value does not reflect what you actually paid or the property's condition, file an objection with the Assessor's office or the Board of Review within the stated timeframe.

Where do my property taxes go?

Your property taxes are divided among multiple local bodies: your school district receives the largest share, followed by your municipality, Will County, and your park district. Each body uses its portion to fund schools, police and fire services, roads, parks, libraries, and other local services. Your tax bill shows the breakdown by body.