This page helps with Property Tax tasks in Will County, Illinois, including tax searches, PIN-based tax bill lookups, assessment searches, payment options, and where to contact the right office.

The Will County Treasurer handles tax bill and payment questions, while the Will County Supervisor of Assessments is the official source for assessment and exemption information.

For a broad property tax search, use the Will County real estate tax search. It supports searches by name, address, or parcel number.

  • Owner name, entered as last name then first name
  • Property address
  • Parcel number, entered without dashes

As you type, the search tool may show suggestions. Choosing a suggestion narrows the results to that record.

  • Enter a name, address, or parcel number in the search field.
  • Select a suggested match if one appears.
  • Use the check boxes on the results page to refine the list.
  • Review the tax year, owner name, property address, parcel number, and installment payment status shown for the record.

Creating an account is optional, but it is needed to schedule payments and use monitoring or eAlert features.

PIN tax bill inquiry

If you already have the Property Index Number, use the real estate tax information inquiry. Enter the 14- or 16-digit PIN without dashes, then submit the form.

The inquiry page is also useful when a mortgage company, bank, or taxpayer needs to look up a specific parcel by PIN. Mortgage companies and banks must submit one check per PIN.

The Will County Supervisor of Assessments provides property assessment and exemption information. Its property search options include address, sales, subdivision, owner name, property class, search portal, map search, PIN search, and township browsing.

For an address-based lookup, use the Will County property address search. You may enter a street number, a street name, or both. City or town may be added to narrow the search, but it is not required.

The Supervisor of Assessments states that 2025 valuations are for the 2025 assessment year, payable in 2026. Tax rates are established by local taxing bodies, not by the Supervisor of Assessments.

Payment options for Will County property taxes

Will County lists several ways to pay property taxes.

Payment method Key details
Mail Mail payment to 302 N. Chicago St., Joliet, IL 60432. Make checks payable to Will County Treasurer.
Phone Pay by phone at (815) 680-2953. Checking or savings withdrawal is free; convenience fees apply to other payment types such as credit cards.
In person The Treasurer’s Office accepts cash, check, and credit cards. Subsequent taxes are accepted in office Monday through Friday, 8:30 a.m. to 3:30 p.m.
Drop box A secure drop box is available at the Will County Building, 302 North Chicago Street, Joliet, IL 60432-4059. Make checks payable to Will County Treasurer.
Local banks Property taxes may be paid at more than 100 participating branch locations.

Tax payment installments are due in early June and early September, and Will County offers an email reminder signup for upcoming payment deadlines.

Delinquent taxes and tax sale information

Prior year taxes, also called back taxes, are taxes that were not paid during the levy year and were sold at the Annual Tax Sale. The Will County Clerk Tax Redemption Department is the office where sold taxes are redeemed or paid.

At a tax sale, only the unpaid tax balance is sold. The house itself is not sold by the Treasurer’s Office, and the Treasurer’s Office does not report the matter to credit agencies.

After the tax sale, redemption is handled through the Will County Clerk’s Office. Redemption periods depend on property classification, and penalties may increase the longer taxes remain unredeemed.

Senior citizen tax deferral

The Will County Treasurer facilitates the Senior Citizens Real Estate Tax Deferral Program for the State of Illinois. This program lets qualified senior citizens defer all or part of property tax and special assessment payments on a principal residence.

The deferral works like a loan against the property’s market value. Deferred amounts are borrowed from the State of Illinois, a lien is filed on the property, and three percent simple interest is charged on deferred amounts.

Applications and recovery agreements are mailed in December, and completed forms must be submitted by the March 1 deadline each year. The maximum yearly deferral is $7,500, and the total deferred amount, including interest and lien fees, is limited to 80% of the taxpayer’s equity in the property.

Will County property tax contacts

Use these contacts for tax bills, payments, assessments, exemptions, and sold tax redemption questions.

  • Will County Treasurer, 302 N. Chicago Street, Joliet, IL 60432
    Phone: (815) 740-4675
    Fax: (815) 740-4695
    Email: [email protected]
    Office hours: Monday - Friday 8:30 AM - 4:30 PM
  • Will County Supervisor of Assessments Office, 302 N. Chicago Street, Joliet, IL 60432
    Phone: (815) 740-4648
    Office hours: Monday - Friday, 8:30 am to 4:30 pm
  • Will County Clerk Tax Redemption Department, 302 N. Chicago Street, Joliet, IL 60432
    Phone: (815) 724-1880
    Email: [email protected]

Common questions

Where can I search Will County property taxes online?

Use the Will County real estate tax search for name, address, or parcel number searches. Use the PIN-based inquiry page when you already have the 14- or 16-digit Property Index Number.

What if I do not know my PIN?

The PIN inquiry page includes an option for users who do not have their PIN. The Supervisor of Assessments property search also supports address-based searching.

Who handles Will County property tax bill questions?

Tax bill questions should go to the Will County Treasurer. Assessment and exemption questions should go to the Will County Supervisor of Assessments.

Where do I pay sold or delinquent taxes?

Sold taxes are redeemed through the Will County Clerk Tax Redemption Department. Prior year taxes that were sold at the Annual Tax Sale are not paid through the regular Treasurer payment process.

Can I pay Will County property taxes after hours?

Yes. Will County lists a secure drop box at the Will County Building, 302 North Chicago Street, Joliet, IL 60432-4059, for after-hours payments by check payable to Will County Treasurer.