PROP TX-OMITTED PROPERTY

Session: 104th General Assembly
Year: 2026
Bill #: HB4637
Category: Revenue
Position: Support
Mandate?
Revenue Loss?
Authority Preemption?

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Summary as Introduced

Amends the Property Tax Code. In counties with fewer than 3,000,000 inhabitants, provides that property that receives an erroneous homestead exemption for the current assessment year or for any of the 3 prior assessment years may be considered omitted property. Provides for penalties and interest to be imposed on that omitted property. Provides that any arrearage of taxes or interest that might have been assessed against that omitted property shall not be chargeable to certain bona fide purchasers of the property. Effective immediately.

Staff Analysis

HB 4637 seeks to tighten the enforcement of property tax exemptions and establish a clearer process for recovering unpaid taxes resulting from administrative or taxpayer errors. The bill specifically targets "erroneous homestead exemptions" in counties with fewer than three million inhabitants, providing local tax officials with expanded authority to treat these errors as "omitted property."

Under current Illinois law, omitted property refers to real estate that was either not assessed or was improperly assessed in previous years, leading to a shortfall in tax revenue. The proposed amendment to Section 9-265 of the Property Tax Code would allow a chief county assessment officer to reclassify any portion of a property that received an unauthorized homestead exemption as omitted property. This authority extends to the current assessment year and the three immediately preceding years. Once a property is identified as having received an erroneous exemption, the county would be empowered to utilize all standard legal remedies to collect the back taxes, along with applicable interest and penalties.

The legislation also addresses the financial consequences of these errors by establishing a standard interest rate for the resulting tax arrearages. If a property is found to have benefited from an improper exemption, interest would be charged at a rate of 10 percent per annum. This interest begins accruing from the date the correct tax bill should have been received and continues until the taxes are paid. This provision is designed to ensure that the public treasury is made whole for the duration that the funds were withheld due to the incorrect exemption.

A significant portion of the bill is dedicated to protecting "bona fide purchasers," individuals or entities who buy a property without knowledge of any underlying tax issues. The proposal stipulates that if a person acquires a property for value and has no notice of an erroneous homestead exemption, they will not be held liable for the arrearage of taxes or interest that accrued before their purchase. This protection applies as long as the buyer’s rights to the property were established after the exemption was granted but before the county officially listed the property as omitted. This "innocent purchaser" clause prevents new homeowners from being unfairly penalized for the mistakes or omissions of previous owners.

House Bill 4637 provides county assessors with a more robust mechanism for auditing homestead exemptions and recovering lost revenue, while simultaneously shielding new property owners from unforeseen debts. By treating erroneous exemptions as omitted property, the bill aims to increase the accuracy of the tax rolls and ensure that property tax burdens are distributed according to the law.



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