Kane County, IL: Property Tax Deadlines, Exemptions and CPA Help

Kane County follows the Fox River from Elgin in the north through St. Charles, Geneva and Batavia to Aurora in the south. Its property tax system looks like the rest of Illinois, but the details that trip owners up are local: bills go out on one schedule, while assessment appeal deadlines differ township by township. Here is what to know about Kane County property tax bills, exemptions and appeals.

Paying the bill

The Treasurer mails one bill containing two coupons. For tax year 2025, the first installment was due June 1, 2026 and the second on September 1, 2026. You can pay online (e-check is free), in a drive-up drop box, by mail with the coupon, at the Treasurer's office in Geneva, at many local banks with the coupon, or at the County Clerk's Aurora and Elgin branch offices by personal check or money order.

Late payers get a staged calendar. In 2026, a publication fee was added to unpaid bills in mid-September, online e-checks stopped on October 14, personal checks in person stopped on October 16, and the tax sale was set for October 26 with no payments accepted that day. Kane also offers a prepayment program with an application on the Treasurer's site, which some owners use to smooth cash flow.

Exemptions

The county lists the same core exemptions as the rest of Illinois: general homestead, senior homestead, the low-income senior assessment freeze, persons with disabilities, veterans with disabilities (with an annual renewal option) and returning veterans. Kane borders Cook, so the general and senior homestead exemptions can reduce assessed value by up to $8,000. The senior freeze income limit rises to $75,000 for the 2026 assessment year, payable in 2027. The general, senior, disability and veterans applications can be filed online.

Appeals depend on your township

Kane assesses by township, and each township has its own final filing date after assessment notices are published. For 2026, the county's schedule included Dundee on July 9, St. Charles on July 20, Geneva on August 17, Batavia on August 31, Aurora on October 13 and Elgin on November 2. Your own notice states your deadline, and missing it ends your appeal for that year. Appeals address the assessment only, not the tax rate. After the Board of Review rules, you have 30 days from the postmark to go to the state Property Tax Appeal Board.

Neighbors and cities

Kane County includes Aurora (which also reaches into DuPage, Will and Kendall), Elgin, Geneva, Batavia, St. Charles and Montgomery. We also help residents with ties to India sort out NRE and NRO accounts and other cross-border reporting.

How we can help

For homeowners, we review your exemptions and assessment notice and help you judge whether an appeal is worth the effort. For landlords and small businesses along the Fox River corridor, we prepare returns, handle payroll and bookkeeping, and plan for property tax as a deductible state and local tax item where the rules allow. For decisions about your own property, speak with a qualified professional.

Frequently asked questions

General information only, not tax, legal or accounting advice for your situation. Rules, limits and deadlines change; confirm the current rules with the official source or a qualified professional before you act. Reading this page does not create a professional relationship with CPA Tax Payroll and Accounting Corp.