This page helps with Property Tax tasks in McHenry County, Illinois, including looking up a tax bill, making a payment, checking due dates, and finding the right office for assessment, exemption, redemption, or rate questions.
Most taxpayers start with the McHenry County Property Tax Inquiry for bill lookup and online payment, then contact the Treasurer, Assessments Office, County Clerk, or Recorder based on the specific issue.
McHenry County Property Tax Inquiry
Use the McHenry County Property Tax Inquiry to search current property tax information and begin an online payment.
- Parcel Number or PIN
- Owner name
- Property address
The search page includes basic, address, sales, advanced, and mobile home search options.
- Enter the parcel number, PIN, owner name, or address in the parcel criteria box.
- Select search to open the matching property result.
- Use the green “PAY TAXES” button when payment is available.
- Add the tax item to the cart and open the shopping cart.
- Complete the payment screens, register for reminder notifications if desired, and print a receipt.
eChecks are free. Debit cards, credit cards, and digital wallet payments have a 2.4% fee, and the Treasurer’s Office receives no portion of that fee.
Tax bill lookup and payment options
The Treasurer’s property tax page also routes taxpayers to bill lookup, online payment, duplicate bill printing, payment options, bank payment information, mobile home tax information, and tax sale information.
You can use the county’s lookup and payment page to reach the same property tax inquiry service.
For current-year property tax bill questions, tax amount due questions, and payment option questions, the County Treasurer’s Office is the public contact.
Important 2026 property tax dates
The Treasurer lists these dates for 2025 property taxes payable in 2026.
| Date | Property tax event |
|---|---|
| June 9, 2026 | First installment due |
| June 10, 2026 | 1.5% interest per month begins on late first-installment payments under Illinois State Statute |
| September 9, 2026 | Second installment due |
| September 10, 2026 | 1.5% interest per month begins on late second-installment payments under Illinois State Statute |
| November 10, 2026 | Last day to pay using credit or debit cards in the Treasurer’s Office |
| November 11, 2026 | Last day to use online payment options |
| November 13, 2026 | Last day to pay taxes to avoid the tax sale, with a 5 p.m. cutoff and no postmark |
| November 16, 2026 | Tax sale begins at 9 a.m. |
Assessment, exemption, and tax rate questions
Property tax tasks in McHenry County are split among several offices. Contact the office that matches the issue instead of sending every question to the Treasurer.
- For assessed value questions or concerns that a value is too high, contact the township assessor.
- For exemptions, assessment notices, tax appeals, name or address changes, farm and special assessments, or mapping, contact the McHenry County Assessments Office.
- For tax rates and tax levy questions, contact the McHenry County Clerk’s Office.
- For deeds, release of lien questions, recorded land records, and quit claim deed forms, contact the McHenry County Recorder’s Office.
The McHenry County Assessments Office maintains current and past assessments, applies exemptions and preferential assessments, supports township assessors, handles assessment notices, and maintains parcel numbering and mapping records.
Property tax exemptions
Exemptions reduce the equalized assessed value of a property, not the tax rate. The actual bill still depends on local tax rates.
McHenry County lists several property tax exemption programs through the property tax exemptions page, including general homestead, senior homestead, low-income senior assessment freeze, senior real estate tax deferral, disability, veteran, accessibility improvement, and home improvement exemptions.
| Program | Key benefit or rule |
|---|---|
| General Homestead Exemption | Reduces equalized assessed value by up to $8,000 for owner-occupied residences. |
| Senior Citizen’s Homestead Exemption | Reduces equalized assessed value by up to $8,000 for taxpayers age 65 or older during the taxable year. |
| Low-Income Senior Citizens Assessment Freeze | Freezes the equalized assessed value at the base year for qualified seniors with household income within the stated limit. |
| Senior Citizens Real Estate Tax Deferral Program | State loan program for qualified seniors, with loans up to $7,500 annually for property taxes. |
| Homestead Exemption for Persons with Disabilities | Reduces equalized assessed value by $2,000 annually for qualifying owner-occupied homes. |
| Home Improvement Exemption | Excludes up to $25,000 of equalized assessed value increase for qualifying improvements for up to 4 years. |
Senior assessment freeze updates
For the Low-Income Senior Citizen Assessment Freeze Homestead Exemption, McHenry County lists updated maximum household income limits beginning with the 2026 property tax year payable in 2027.
| Property tax year | Payable year | Household income year | Maximum household income |
|---|---|---|---|
| 2025 | 2026 | 2024 | $65,000 |
| 2026 | 2027 | 2025 | $75,000 |
| 2027 | 2028 | 2026 | $77,000 |
| 2028 | 2029 | 2027 | $79,000 |
For 2026 payable 2027 senior freeze applications, the due date to the Assessment Office is July 1, 2026.
Delinquent taxes and tax redemption
If unpaid taxes have been sold at the annual tax sale, the County Clerk’s Office handles tax redemption. The Clerk’s Office can provide an estimate of redemption.
Current-year taxes are paid to the County Collector before the tax sale. After the tax sale occurs, redemption must be handled through the County Clerk’s Office.
Partial payments and payment plans are not accepted for delinquent tax redemption. Payment must be made in full by cashier’s check, official check, money order, or exact cash.
For more detail on sold taxes, redemption status, and redemption estimates, use the County Clerk’s tax redemption information.
How McHenry County calculates property taxes
The County Clerk’s Tax Extension Department calculates tax rates for local taxing districts in McHenry County. Tax extension is the rate calculation process, not an extension of a payment due date.
The tax bill is based on property value, equalization, exemptions, and the combined property tax rate. The Clerk’s Property Tax 101 page explains the general sequence from fair cash value to taxes due.
- The township assessor determines the fair cash value and assessed value.
- An equalization factor may be applied to reach the required assessment level.
- The state multiplier is applied to determine state equalized value.
- Exemptions are subtracted to determine taxable value.
- The County Clerk’s property tax rate is applied.
- The Treasurer collects the taxes due.
McHenry County property tax contacts
Use these contacts for property tax lookup, payments, assessments, exemptions, tax rates, redemption, and recorded property records.
- McHenry County Treasurer’s Office, 2100 N. Seminary Ave., Woodstock, IL 60098. Mailing address: Office of Treasurer, 2200 N. Seminary Ave., Woodstock, IL 60098. Treasurer Services hours: 7:30 AM - 5:00 PM Monday - Friday. Phone: (815) 334-4260. Fax: (815) 338-1737. Email: [email protected].
- McHenry County Assessments Office, 667 Ware Rd., Room 106, Woodstock, IL 60098. Mailing address: Office of Assessments, 2200 N. Seminary Ave., Woodstock, IL 60098. Phone: (815) 334-4290. Fax: (815) 338-8522. Email: [email protected].
- McHenry County Clerk’s Office, 667 Ware Rd., Room 107, Woodstock, IL 60098. Mailing address: McHenry County Clerk, 2200 N. Seminary Ave., Woodstock, IL 60098. Phone: (815) 334-4242. Fax: (815) 334-8727. Tax redemption email: [email protected]. Tax extension email: [email protected].
- McHenry County Recorder’s Office. Phone: (815) 334-4110. Email: [email protected].
Common questions
Where can I look up and pay McHenry County property taxes online?
Use the McHenry County Property Tax Inquiry. You can search by PIN, parcel number, owner name, or address, then use the payment option when available.
Who handles property tax bill and payment questions?
The McHenry County Treasurer’s Office handles property tax bills, tax amounts due, and payment options. Call (815) 334-4260 or email [[email protected]](mailto:[email protected]).
Who should I contact about exemptions or a missing exemption?
Contact the McHenry County Assessments Office for exemption questions. The office can be reached at (815) 334-4290 or [[email protected]](mailto:[email protected]).
What should I do if my taxes have been sold?
Contact the McHenry County Clerk’s Office immediately for redemption information. The tax redemption phone number is (815) 334-4242, and the email is [[email protected]](mailto:[email protected]).
Are property taxes due even if I do not receive a bill?
Yes. Under Illinois law, taxes are due and must be paid on time whether or not a tax bill is received.
Does tax extension mean my due date is extended?
No. Tax extension is the process the County Clerk’s Office uses to calculate property tax rates for taxing districts. It is not an extension of the payment due date.