ST. CLAIR COUNTY, ILLINOIS • 2026 PROPERTY TAX GUIDE
St. Clair County Property Tax: Find Your Bill, Pay Online, Check Records & Calculate Your Taxes
Looking for your St. Clair County property tax bill, payment status, parcel information or an estimate of your next tax bill? The county provides an official property tax inquiry, online payment portal, assessment records and taxpayer assistance programs.
This guide covers the actual St. Clair County, Illinois systems serving Belleville, O’Fallon, East St. Louis, Fairview Heights, Swansea, Shiloh, Cahokia Heights and surrounding communities.
START HERE
Where Can You Look Up or Pay St. Clair County Property Taxes?
For a property tax bill or payment history, start with the St. Clair County Property Tax Inquiry, the county-linked DEVNET system. It lets you search by an 11-digit parcel number, owner name or property address.
For online payment, the county Treasurer links directly to the Municipay payment system. For assessment values and exemptions, contact the St. Clair County Assessor. The County Clerk handles tax rates and certain delinquent-tax redemption matters.
Find your tax bill
Parcel search, property address, owner name, multiple tax years and receipts.
DEVNET Property Inquiry ↗Pay online
Use the Treasurer’s authorized payment processor for eligible current accounts.
Municipay Payment Portal ↗Check assessment
Review assessed value, property details and homestead exemptions.
County Assessor ↗Resolve delinquent taxes
Check tax-sale status, redemption procedures and amounts owed.
County Clerk ↗01 / PROPERTY RECORD SEARCH
How to Look Up St. Clair County Property Taxes by Address, Name or Parcel Number
The official St. Clair County Property Tax Inquiry offers Basic Search, Address Search, Sales Search, Advanced Search and Mobile Home Search. You can begin with information you already know rather than needing to visit the Treasurer’s office.
DEVNET / wEdge public parcel and tax record search
Exact lookup steps
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Open the Property Tax Inquiry.
Choose the DEVNET link above, or open the county Treasurer website and select Real Estate & Mobile Home Inquiry.
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Select Basic Search for a parcel number or owner name.
The Basic Search contains a field labeled 11 Digit Parcel Number or Owner Name. Enter one of these identifiers and click Search.
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Select Address Search if you don’t know the parcel number.
Enter the House Number (Low), optional House Number (High), Street Name and City. Start with the house number and street name when possible.
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Review the matching parcels.
Check the property address, parcel identification, owner information and municipality. Avoid selecting a similarly named property by mistake.
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Open the property’s detailed record.
Review the available valuation, tax-year and billing information. The county inquiry provides access to current and multiple prior-year tax information.
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Check taxes and payment status.
Compare the assessment information, billed amount, installments and posted payments for the tax year you need.
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Print or save the available record.
The Treasurer advises that taxpayers can verify posted payments and print receipts through its property tax inquiry, subject to processing time.
Other DEVNET searches you can use
| Search option | Available criteria | Best use |
|---|---|---|
| Basic Search | 11-digit parcel number or owner name | Fast property lookup when the tax bill or ownership name is known. |
| Address Search | House-number range, street, city | Searching a home without a parcel number. |
| Sales Search | Sale-price range and sale-date range | Reviewing available property transaction data. |
| Advanced Search | Property class, township, tax district and tax year | Narrowing records by jurisdiction or searching historical years. |
| Mobile Home Search | Mobile home number, owner name or site address | Finding mobile-home tax records. |
02 / ONLINE PAYMENTS
How to Pay St. Clair County Property Taxes Online
St. Clair County, Illinois uses Municipay as its county-linked online property tax payment service. You can open it through the official Treasurer website. The system supports card and ACH/electronic-check payments, subject to its current conditions and availability.
Municipay payment search
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Open the county’s authorized payment page.
Use the link above. If the portal displays a browser verification or JavaScript requirement, complete it in your browser to continue.
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Find the parcel using the payment search.
Follow the current portal prompts. The processor’s terms reference Parcel Search when adding payments.
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Confirm the property and current amount.
Make sure the parcel number, tax year, installment and amount due correspond to your property. Check whether penalties are included.
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Review the payment method and fee.
Select an accepted credit card or ACH/e-check method. Read the final fee and total charge before authorizing payment.
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Pay once and save your confirmation.
The processor specifically warns users not to refresh or leave the page while the payment processes. Keep the confirmation number and receipt.
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Verify that the payment posted.
The online payment terms say processing can take three to five business days. Check the DEVNET inquiry afterward; contact the Treasurer if the payment does not appear.
Do you need to create an account?
No account is required for checkout according to the payment processor’s published terms. Account registration is optional and may provide features such as payment history and a digital wallet.
03 / ONLINE PROCESSING COSTS
St. Clair County Online Property Tax Payment Fees
The authorized Municipay terms list the following processing charges:
The processor lists Visa, Mastercard, Discover and American Express. Processing charges are retained by the payment service rather than the County Treasurer and may be nonrefundable.
| Illustrative tax payment | Credit card processing fee | ACH processing fee |
|---|---|---|
| $500 | $12.50 | $1.50 |
| $1,000 | $25.00 | $1.50 |
| $2,500 | $62.50 | $1.50 |
| $5,000 | $125.00 | $1.50 |
Illustrations use the published 2.5% card fee and $1.50 ACH fee, not a live checkout quote. Verify the actual total in the authorized payment portal. The county’s general FAQ contains an older $2 e-check figure; the processor’s live terms should control the displayed checkout charge.
Read the payment processor’s terms →04 / 2026 COUNTY TAX CALENDAR
St. Clair County Illinois Property Tax Due Dates for 2026
The county published the following schedule for 2025 real estate taxes payable in 2026. The official calendar labels its dates tentative until further notice, so confirm time-sensitive arrangements with the Treasurer.
| Date | Event | Practical implication |
|---|---|---|
| May 26, 2026 | Tax bills mailed | Homeowners should have received the annual bill. |
| July 1, 2026 | First installment due | First-half payment deadline. |
| September 1, 2026 | Second installment due | Second-half payment deadline. |
| September 18, 2026 | Last day to avoid publication | Funds must reach the office by 4:30 p.m.; electronic payments stop at 3 p.m. for the weekend. |
| September 25, 2026 | Certified notices mailed | Notice stage for qualifying delinquent accounts. |
| September 28–October 2, 2026 | Newspaper publication period | Delinquency publication timetable. |
| October 16, 2026 | Tax-buyer registration deadline | Tax-sale administration deadline. |
| October 30, 2026 | Last day to pay before tax sale | Office receipt deadline 4:30 p.m.; electronic payment ends at 3 p.m. |
| November 2, 2026 | Annual tax sale | Qualifying delinquent taxes may be sold. |
05 / PROPERTY TAX ESTIMATOR
St. Clair County Illinois Property Tax Calculator
Property taxes are determined using the property’s taxable assessed value and the combined rate of its applicable taxing districts. Most ordinary real property in Illinois outside Cook County is assessed at approximately one-third of fair cash value before the applicable adjustments.
For the closest estimate, enter the Local Value or appropriate EAV from your official property record, qualifying exemptions and the combined tax rate from your tax bill. St. Clair County does not have one uniform tax rate for every parcel.
Estimate a St. Clair County Property Tax Bill
Planning tool only. It does not access government tax records or submit your information.
The rate is blank intentionally. Use your parcel’s real combined tax rate, not a generic countywide average.
How to read the tax calculation on a St. Clair County bill
The county Treasurer explains that exemptions are subtracted from the Local Value shown on the bill to determine Taxable Value. The combined tax rate represents the individual rates of the taxing bodies listed on the bill.
Taxable Value × Combined Tax Rate = Basic Property Tax
Example only: If the value used for the calculation is $80,000 and approved EAV exemptions total $6,000, the taxable value would be $74,000. If the property’s hypothetical combined tax rate is 8%, the basic annual tax would be $5,920 before any additional adjustments. The 8% is illustrative—not a verified rate for any specific St. Clair parcel.
The county has an official explanation at How Property Taxes Are Calculated.
06 / PROPERTY TAX RELIEF
St. Clair County Homestead, Senior, Disability and Veteran Exemptions
Eligible St. Clair County homeowners can reduce taxable assessed value through Illinois property tax exemptions. Some programs are administered by the County Assessor; the Board of Review also has responsibilities for specified exemptions and appeals.
| Program | Potential benefit | Who should investigate |
|---|---|---|
| General Homestead | Up to $6,000 EAV reduction in St. Clair County. | Qualifying owner-occupied principal residences. |
| Senior Citizens Homestead | Generally $5,000 EAV reduction. | Qualifying homeowners age 65 or older. |
| Senior Assessment Freeze | Qualifying assessed-value freeze at a base-year level. | Eligible senior residents meeting age, income and ownership rules. |
| Persons with Disabilities | Qualifying $2,000 EAV reduction. | Eligible owner-occupants with qualifying disabilities. |
| Veterans with Disabilities | Benefits vary by qualifying service-connected disability rating. | Eligible veterans and certain qualifying surviving spouses. |
| Returning Veterans | Qualifying temporary EAV exemption. | Eligible returning service members. |
| Homestead Improvement | Temporary exclusion of qualifying improvement-related assessed-value increases within statutory limits. | Homeowners making qualifying improvements. |
Senior Freeze income limit: check the correct assessment year
For the 2026 assessment year, the county’s current senior taxpayer guidance describes a household income limit of $75,000, along with other eligibility requirements. A previously issued 2025 application describes a different income limit. Do not use the 2026 eligibility amount to assume someone qualified for a previous tax year.
The Senior Assessment Freeze does not freeze the tax bill itself. Changes in rates and certain improvements can still affect what is owed.
How to apply for an exemption
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Open the County Assessor’s website.
Select Documents & Forms or the relevant exemption section.
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Choose the correct application.
The county maintains General Homestead, PTAX-324 Senior Homestead, PTAX-340 Senior Assessment Freeze, PTAX-342 Disabled Veterans and PTAX-343 Disability forms, among others.
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Read the form’s tax-year instructions.
Check age, income, occupancy, ownership, disability documentation and any renewal requirements.
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Complete the parcel and applicant fields.
Use the property index number and required supporting documents.
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Submit to the office identified for the program.
Do not assume every form goes to the Treasurer. Confirm the Assessor or Board of Review submission route.
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Confirm that the benefit appears on the next applicable record.
Review the assessment and tax bill when processed.
Homestead applications, senior programs, veterans and disability forms.
For homeowner exemption questions, the Assessor’s customer service team can be reached at (618) 825-2704 or homesteadexemptions@co.st-clair.il.us.
07 / PAYMENT OPTIONS
St. Clair County Monthly Property Tax Payment Plan and Partial Payments
St. Clair County provides more than the standard twice-yearly installment arrangement. Its Treasurer has a monthly payment plan through EquaPay and also discusses partial payments under the county’s collection procedures.
Option 1: Monthly budgeting through EquaPay
The Treasurer’s website links to EquaPay, a service designed to split eligible property tax payments into predictable monthly amounts, particularly for properties not already paid through mortgage escrow.
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Visit the county’s Monthly Payment Plan page.
Open the official Treasurer page linked below.
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Choose the EquaPay enrollment link.
Search your property by name, address or property ID.
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Create an account.
Choose a draft date and one of the payment methods offered by the service.
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Review the proposed monthly schedule.
EquaPay calculates payments based on the time remaining before the tax due date.
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Confirm enrollment and monitor the account.
Check the plan’s fees, draft dates, cancellation rules and tax payment posting.
Option 2: Partial payments to the Treasurer
The county says partial property tax payments are accepted by the Treasurer’s office, not by collector banks. Partial payment does not stop penalties on the unpaid portion after the applicable installment deadline.
08 / DELINQUENT PROPERTY TAXES
Late St. Clair County Property Taxes, Publication and Tax Sale
If either regular installment remains unpaid after its due date, penalties can apply. Continued delinquency may lead to newspaper publication and the annual tax-sale process.
Applicable late-payment penalties begin.
September 18, 2026 was the published last day to avoid delinquency publication.
October 30, 2026 is the county’s listed last day to pay before tax sale.
November 2, 2026 is the scheduled tax-sale date.
What should you do with a delinquent bill?
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Find the property in the official tax inquiry.
Record the parcel number and tax year.
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Check the current balance.
Review unpaid installments and penalties. Do not rely on the original amount printed on an old bill.
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Contact the Treasurer if the tax sale is approaching.
Ask about payment methods, deadlines and the exact amount required.
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If the taxes have already been sold, contact the County Clerk.
The Clerk administers delinquent-tax redemption services. Redemption amounts may include statutory interest, penalties and costs.
10 Public Square, Belleville, IL 62220
The Clerk’s website says mailed redemption payments should use acceptable certified funds or money orders and include the parcel number or address. Confirm the redemption payoff and payment instructions directly with the Clerk.
A tax sale does not always transfer immediate ownership. Redemption and possible tax deed proceedings have separate legal requirements under Illinois law.
09 / ASSESSMENT APPEALS
How to Appeal a St. Clair County Property Tax Assessment
A property tax assessment dispute is different from a tax collection dispute. The County Assessor values property, while the County Treasurer collects the resulting bill.
If you believe your home’s valuation is inaccurate, review its property record and any available comparable sales before filing with the Board of Review.
Practical appeal process
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Review your assessment information.
Check the Assessor’s property record for land area, building characteristics, classification and the assessed value.
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Check when assessments were published.
St. Clair County publishes assessment information by township. Use the official publication dates for the assessment year.
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Collect supporting evidence.
Use relevant comparable sales, property condition information and factual corrections.
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Read Board of Review rules.
The county’s published rules describe filing requirements, evidence and hearing procedures.
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Submit your appeal within the permitted period.
The Treasurer says the usual 30-day filing window begins with publication of the applicable revised assessments. Confirm the exact deadline for your township and assessment year.
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Review the Board’s decision.
If further appeal is appropriate, Illinois Property Tax Appeal Board procedures and deadlines may apply.
| Issue | Proper office or process |
|---|---|
| Incorrect property value | Assessor / Board of Review assessment appeal |
| Missing homestead exemption | Assessor or relevant exemption administrator |
| Questions about tax rates | County Clerk / relevant taxing district |
| Incorrect payment posting | County Treasurer |
| Judicial tax objection | Applicable circuit court process and statutory deadlines |
10 / COUNTY CONTACTS
St. Clair County Illinois Property Tax Offices and Contact Information
St. Clair County Treasurer
Use for: Tax bills, payments, posted receipts, partial payments and current delinquency questions.
Address: 10 Public Square, Belleville, IL 62220
Phone: (618) 825-2707
Email: treasurer@co.st-clair.il.us
Hours: Monday–Friday, 8:30 a.m.–4:30 p.m.
Official Treasurer Website ↗St. Clair County Assessor
Use for: Property assessments, valuation questions, property details and applicable exemptions.
Address: 10 Public Square, Belleville, IL 62220
Phone: (618) 825-2704
Email: assessor@co.st-clair.il.us
Official Assessor Website ↗St. Clair County Board of Review
Use for: Qualifying assessment appeals, certain exemptions and senior assessment matters.
Address: 10 Public Square, Belleville, IL 62220
Phone: (618) 825-2489
Email: boardreview@co.st-clair.il.us
Assessment and Board Resources ↗St. Clair County Clerk
Use for: Tax rate questions, property tax extensions and tax-sale redemption information.
Address: 10 Public Square, Belleville, IL 62220
Main county line: (618) 277-6600
Hours: Monday–Friday, 8:30 a.m.–5:00 p.m.
Official County Clerk Website ↗10 Public Square, Belleville, Illinois 62220
Parking and entrance arrangements may change during the county’s building renovation work. Check county notices before visiting.
11 / TROUBLESHOOTING
Common St. Clair Property Tax Problems and Solutions
| Problem | What to check | Next action |
|---|---|---|
| No property result | Correct Illinois portal, address spelling and parcel number. | Try DEVNET Basic Search or Address Search. |
| Bill not received | Property mailing address and parcel search. | Retrieve the record or contact the Treasurer. |
| Payment still shows unpaid | 3–5 business-day processing and payment confirmation. | Contact the Treasurer before submitting twice. |
| Incorrect property value | Assessor’s property record and valuation evidence. | Contact Assessor or Board of Review. |
| Homestead exemption missing | Qualification and application status. | Assessor’s exemption staff. |
| Escrow company hasn’t paid | Mortgage servicer payment status. | Check with servicer and Treasurer. |
| Older taxes sold | Tax year, sale status and redemption balance. | County Clerk’s redemption process. |
| Mobile home tax question | Mobile Home Search rather than ordinary parcel search. | Assessor for records, Treasurer for collection. |
| Moving to a new house | Assessment, exemptions and address update. | Notify the relevant county offices. |
12 / COMMON QUESTIONS
St. Clair County Illinois Property Tax FAQs
How do I look up St. Clair County property taxes?
Use the official St. Clair County Property Tax Inquiry at stclairil.devnetwedge.com. Search by 11-digit parcel number, owner name or property address.
Where can I pay St. Clair County Illinois property taxes online?
The County Treasurer links to the Municipay portal at payments.municipay.com/il_stclair/search. Confirm the parcel and balance, review fees, and keep your receipt.
What are the 2026 property tax due dates?
For 2025 taxes payable in 2026, the first installment was due July 1 and the second was due September 1, 2026.
How much does online property tax payment cost?
The online processor lists 2.5% for card payments, with a $2 minimum, and $1.50 for ACH/electronic checks. Verify the final charges at checkout.
Can I find previous years’ property tax records?
Yes. The County Treasurer indicates that the property inquiry supports current and multiple prior tax years. The available history depends on the record.
How do I get a property tax payment receipt?
Check the county’s Property Tax Inquiry after the payment posts. The Treasurer states that taxpayers can verify payment postings and print receipts through the inquiry system.
What is the St. Clair County property tax rate?
There is no single rate for every parcel. The combined tax rate depends on the taxing bodies serving the property. Look at the rate and taxing district breakdown on the official bill.
Can I pay St. Clair County taxes monthly?
The Treasurer links to the EquaPay monthly payment program for eligible accounts. Review the enrollment conditions, fees and monthly schedule on the official county page.
Can I make a partial payment?
The Treasurer says partial payments may be accepted at its office, but collector banks cannot accept them. Late-payment penalties can still apply to remaining balances.
What happens if I miss the property tax deadline?
Illinois late-payment penalties may apply, and continued delinquency can lead to publication and tax sale. Ask the Treasurer for the current payoff amount.
When is the 2026 St. Clair County property tax sale?
The county scheduled its annual tax sale for November 2, 2026, with October 30 as the published last collection date before sale.
Does St. Clair County offer a senior property tax exemption?
Yes. Qualifying residents age 65 and older may be eligible for the Senior Citizens Homestead Exemption and, depending on income and other requirements, the Senior Assessment Freeze.
How do I appeal my property’s assessed value?
Review the Assessor’s property record and official township publication dates, then use the Board of Review appeal procedures within the required filing period.
Is this information for St. Clair County, Michigan?
No. This guide is for St. Clair County, Illinois, whose county offices are in Belleville. St. Clair County, Michigan, uses different tax offices, rates, deadlines and payment systems.
Is PropertyTaxUSA.org an official St. Clair County payment service?
No. PropertyTaxUSA.org is an independent educational website. It does not operate the county payment portal, maintain official tax accounts or accept property tax payments.
OFFICIAL SOURCES
St. Clair County Property Tax Websites and Government References
- St. Clair County Treasurer — Main Website
- St. Clair County — DEVNET Property Tax Inquiry
- St. Clair County — Online Property Tax Payment
- Online Payment Processor Terms and Fees
- Treasurer — 2026 Real Estate Tax Collection Dates
- Treasurer — How Property Taxes Are Calculated
- Treasurer — Partial Payments
- Treasurer — Monthly Payment Plan
- St. Clair County Assessor
- Assessor — Exemption Documents and Forms
- Treasurer — Property Tax Appeals
- County Clerk — Tax Extension and Redemption Resources
- Illinois Department of Revenue — Property Tax Relief
Reviewed October 9, 2026. Always confirm live account balances, appeal deadlines, fees and tax-sale instructions with the responsible government office.