Property tax in Kane County, Illinois
In Kane County, the property tax bill comes from the Kane County Treasurer. Every due date for the 2025 Taxes Payable 2026 bill has passed, and the county had not posted the next cycle's dates when we checked. You can look up and pay the bill on the county's own payment page. Taken from Kane County's own pages, checked September 23, 2026.
The median property tax bill in Kane County, Illinois is $7,382 a year, which is about 2.26% of the county's median home value of $327,000. That effective rate is higher than the typical Illinois county (1.81%) and higher than the national median (0.81%). These are American Community Survey 5-year estimates (2024); your own bill depends on your home's assessed value and any exemptions.
Who sends the property tax bill in Kane County, and how do you pay it?
The bill comes from the Kane County Treasurer. The value it is based on is set by a separate office, the Kane County Supervisor of Assessments, with the township assessors, which is who to ask if the value looks wrong. For how to look up and pay the bill, go to the county's own payment information.
Township assessors value homes, and a decision of the Board of Review can be taken to the Illinois Property Tax Appeal Board. The exemptions on the county's pages (general homestead, senior, senior assessment freeze, disability, veterans, home improvement) are the state's programs, applied for through the county. E-check payments online are free; card payments carry a processor fee of 2.35%. Besides the Treasurer's office in Geneva and its 24-hour drop box, the County Clerk's branch offices in Aurora and Elgin take payments by personal check or money order. Partial payments are not accepted. If an escrowing lender pays late, the lender is responsible for the penalties, not the homeowner's escrow account. Mobile homes get a separate bill with a $100 late fee.
When are property taxes due in Kane County?
Every due date for the 2025 Taxes Payable 2026 bill has passed, and Kane County had not posted the next cycle's dates when we checked on September 23, 2026. If that bill is still unpaid, the late-payment rules below apply to it. Counties usually repeat the schedule, but confirm the new dates on your next bill. For the 2025 Taxes Payable 2026 bill, Kane County splits the bill into 2 payments, the first due June 1, 2026 and the last September 1, 2026. There is no grace period. Illinois law charges interest of 1.5% a month, or part of a month, starting the day after the due date. On the first installment that is 1.5% from June 2, rising 1.5% on the 2nd of each month to 7.5% from October 2; on the second installment it is 1.5% from September 2 and 3.0% from October 2. Payments after September 15 also carry a $10 publication fee, postmarks are not honored after October 1, and payments after October 16 must be cash, cashier's check or money order. The last day to pay is Friday, October 23, 2026, and unpaid taxes go to the tax sale on Monday, October 26, 2026, after which they must be redeemed through the County Clerk. The Treasurer's general FAQ still says the last Friday in October, but this year's schedule ends on October 23.
| Payment | Due | Note |
|---|---|---|
| First installment | June 1, 2026 (passed) | Bills for 2025 taxes were mailed on or before May 1, 2026. Mailed payments count if the post office, not a postage meter, dates the postmark on or before the due date. |
| Second installment | September 1, 2026 (passed) | Many Kane County banks accept on-time payments at their drive-ups if you bring the payment coupon; the banks stop taking payments after the second due date. |
From Kane County's published schedule, checked September 23, 2026. If a date falls on a weekend or holiday, the county's own rules on the next business day apply.
Estimate the property tax on a home in Kane County
Enter a home's market value for a ballpark at Kane County's average effective rate of 2.26% (Census). The real bill depends on the home's assessed value, the millage where it sits and any exemptions.
Estimated property tax: $7,390 / year
Property tax in Kane County at a glance
| Measure | Value |
|---|---|
| Median annual property tax | $7,382 |
| Median home value | $327,000 |
| Effective tax rate | 2.26% |
| Typical Illinois county rate | 1.81% |
| National median county rate | 0.81% |
Effective rate = median real estate taxes paid divided by median home value. Source: U.S. Census Bureau, American Community Survey 5-year estimates.
How does Kane County compare in Illinois?
Among Illinois's 102 counties, Kane County has the 8th highest effective property-tax rate: 7 rank higher and 94 rank lower. That places it among the most heavily taxed counties in the state. Nationally, it ranks 36th of 3135 US counties by effective rate. See every Illinois county ranked.
How much do homeowners in Kane County actually pay?
The median is only the middle bill. Across Kane County's 140,301 owner-occupied homes, 89.3% pay $3,000 or more a year in property tax, 93% pay at least $2,000, and 2.2% pay under $800. Another 1.9% report paying no property tax at all, which usually means an exemption covers the whole bill.
| Annual bill | Homes | Share |
|---|---|---|
| Under $800 | 3,107 | 2.2% |
| $800 to $1,499 | 2,597 | 1.9% |
| $1,500 to $1,999 | 1,494 | 1.1% |
| $2,000 to $2,999 | 5,168 | 3.7% |
| $3,000 or more | 125,320 | 89.3% |
| No property tax paid | 2,615 | 1.9% |
Owners with a mortgage pay a median of $7,753 and owners without one pay $6,609. Owners who have paid off a home have usually held it longer, and in states that cap how fast an existing owner's assessment can rise, long-held homes carry lower assessed values. Census table B25103.
How does the Kane County property tax bill compare with local incomes?
The median property tax bill of $7,382 is about 6.1% of the median income of Kane County homeowner households, $120,129 a year. That compares two middles, so a retiree in a long-held home can pay a far larger share. 76% of Kane County's occupied homes are lived in by their owners; renters pay property tax too, just folded into rent.
Have property taxes gone up in Kane County?
Yes. The median bill went from $6,286 in 2015-2019 to $7,382 in 2020-2024, a 17.4% rise. Over the same span the median home value moved 37.2%, from $238,300 to $327,000. Bills rose more slowly than values, which is what assessment caps and falling millage rates do: the county is taxing a smaller share of each home's worth.
Two Census ACS 5-year periods with no survey years in common, in each period's own dollars. A change counts only if it exceeds the combined 90% margin of error.
Property tax in counties next to Kane County
Kane County borders 5 counties.
| County | Effective rate | Median bill | Median home value |
|---|---|---|---|
| DeKalb County, IL | 2.45% | $5,974 | $243,600 |
| Kendall County, IL | 2.37% | $7,651 | $322,400 |
| McHenry County, IL | 2.36% | $7,274 | $308,100 |
| Kane County, IL (this county) | 2.26% | $7,382 | $327,000 |
| DuPage County, IL | 2.05% | $8,007 | $391,400 |
| Cook County, IL | 1.91% | $6,191 | $324,500 |
How is a home assessed in Kane County?
Illinois assesses homes at 33.33% of market value in every county, Kane County included. How Illinois assesses and reappraises homes.
Is there a homestead exemption in Kane County?
Yes. Illinois's General Homestead Exemption is $6,000 of equalized assessed value in most counties, $8,000 in counties next to Cook, and $10,000 in Cook County. That is the Illinois rule, and it applies in Kane County. Illinois's exemptions and relief programs in full.
Kane County does not add relief programs of its own beyond the Illinois ones (checked September 23, 2026).
How to appeal your Kane County property assessment
In Kane County you appeal to the Kane County Board of Review. The deadline: Within 30 days after your township's assessment changes are published in the newspaper; a complaint mailed by U.S. Postal Service counts as filed on its postmark date. For 2026 the deadlines run township by township, from July 9, 2026 (Dundee) to October 21, 2026 (Plato); Aurora, Kaneville and Virgil are due October 13, 2026. Deadlines for Burlington, Campton, Elgin and Hampshire had not been posted as of September 23, 2026. How to file. Checked September 23, 2026 against the official appeal rules.
How Illinois's appeal process works, including the next level if the first one turns you down.
Illinois rules from primary state sources, reviewed September 7, 2026; sources on the Illinois page.
Work out your own numbers
-
How much house can I afford?
Your income, debts and down payment against the 28/36 rule lenders actually use, with Kane County's tax rate to hand.
-
Mortgage calculator
Monthly payment with principal, interest, tax and insurance, plus what an extra payment saves you.
-
Illinois income tax
Brackets, standard deduction and what Illinois actually taxes.
-
Sales tax in Kane County
The other local tax: combined state and local rate for this county.
Sources
- Median real estate taxes paid and median home value for Kane County, Illinois: U.S. Census Bureau, American Community Survey 5-year estimates (2020-2024), tables B25103, B25077, B25102, B25119 and B25003; the five-year comparison uses the 2015-2019 estimates. Neighboring counties: Census county adjacency file.