Q: When are property taxes due for the current year?
A: For 2024 taxes (payable 2025), the first installment is due November 14, 2025, and the second installment is due January 16, 2026. Payments must be postmarked by January 31, 2026 to avoid penalties.
Q: What tax credits are available and how do I apply?
A: The primary tax credit is the Homeowner Exemption, which reduces your assessed value by up to $10,000 if you own and occupy your home as your primary residence. This credit requires a separate application to the Supervisor of Assessments and is not automatic. Senior citizen exemptions may also be available. Contact the Supervisor of Assessments to verify eligibility and apply.
Q: How does the Homestead exemption work?
A: Illinois offers a Homeowner Exemption (often called homestead) that reduces your Equalized Assessed Value (EAV) by up to $10,000. This is not automatic - you must apply with the Supervisor of Assessments office. The exemption helps limit assessment increases rather than reducing market value.
Q: When are properties reassessed and how can I appeal?
A: Property assessments are updated annually, with the Supervisor of Assessments reviewing market values and making adjustments. If you disagree with your assessment, you can appeal to the Board of Review. Contact the Supervisor of Assessments office for current appeal deadlines and procedures.
Q: What are the penalties for late payment?
A: Late payment penalties and interest charges apply to property taxes not paid by the due dates. Contact the County Treasurer's office for current penalty rates and interest charges on delinquent accounts.
Q: Can I pay my property taxes online?
A: Yes, Williamson County accepts online property tax payments by credit card or electronic check (e-check). Note that online payments may not immediately reflect in your account history, and credit card processing fees may apply.
Q: Why is my tax rate different from my neighbor's?
A: Tax rates vary by location within Williamson County based on which special taxing districts serve your property. Different school districts, fire districts, municipalities, and other special districts create different total tax rates even for properties in the same general area.
Q: What triggers a supplemental tax bill?
A: Supplemental taxes are issued when property changes ownership, new construction is completed, major improvements are made, or assessment corrections occur during the tax year. These create additional tax liability for the affected portion of the year.
