How to Pay Your Cook County Property Tax Bill
Where Your Property Tax Payment Goes and How to Send It
Cook County property taxes are collected by the Cook County Assessor's Office and the Cook County Treasurer's Office. The Treasurer's Office handles the actual payment collection, and you send your check or set up a payment to them, not to your municipality or your mortgage lender (though your lender may collect taxes from you as part of your escrow account). The tax bill itself comes from the Assessor's Office, which determines the assessed value of your property, but payment goes to the Treasurer.
You can pay by mail, online through the Treasurer's website, by phone, or in person at a Treasurer's office. The Treasurer accepts checks, money orders, credit cards, debit cards, and electronic bank transfers. If you pay by mail, send your payment to the Cook County Treasurer's Office at 69 West Washington Street, Chicago, IL 60602, and include your property index number (PIN) on the check. Online payment through cookcountytreasurer.com is the fastest way to confirm your payment was received and to see your account status immediately.
Key Takeaways
- Property tax bills in Cook County are issued twice per year, typically in May and September, and each bill covers six months of taxes.
- You can pay online at cookcountytreasurer.com, by mail to the Treasurer's Office, by phone at 312-603-5500, or in person at any Treasurer's office location.
- Late payments trigger a penalty of 1.5 percent per month on the unpaid balance, starting the day after the due date.
- If you own your home with a mortgage, your lender may pay taxes on your behalf from your escrow account, so check your mortgage documents to understand your responsibility.
- The Cook County Assessor's Office determines your tax amount, but the Treasurer's Office collects payment—send money to the Treasurer, not the Assessor.
Understanding Your Property Tax Bill and Due Dates
Cook County sends property tax bills twice per year. The first bill, issued in May, covers taxes for January through June. The second bill, issued in September, covers July through December. Each bill shows the due date, which is typically 30 days from the issue date, though the exact date varies slightly year to year. The bill lists your property index number (PIN), the assessed value of your property, the tax rate, and the total amount owed.
Your bill may also show a breakdown by taxing body—the school district, forest preserve, library, and other local entities that receive a portion of your property tax payment. The Cook County Treasurer collects all of these portions together and distributes them to each body. You do not pay each entity separately; you pay one bill to the Treasurer.
If you do not receive a bill by the due date, you are still responsible for paying on time. Contact the Treasurer's Office to confirm your address on file and request a duplicate bill. Late payment penalties begin accruing the day after the due date, so do not assume a missing bill excuses the payment.
Payment Methods and How to Confirm Receipt
The Cook County Treasurer's Office accepts payment through five main channels. Online payment through cookcountytreasurer.com is available 24 hours a day and shows your payment status immediately. Phone payment can be made by calling 312-603-5500 during business hours; you will need your PIN and a credit or debit card. Mail payment should include your PIN on the check or money order and be sent to 69 West Washington Street, Chicago, IL 60602; mail payments take 7 to 10 business days to post to your account.
In-person payment at any Cook County Treasurer's office location allows you to pay by cash, check, or card and receive a receipt on the spot. The main office is at 69 West Washington Street in Chicago, and satellite offices are located throughout the county. Electronic bank transfer (ACH) can be set up through your bank's bill-pay system; instruct your bank to send the payment to the Cook County Treasurer at the address above, and include your PIN in the memo line.
Regardless of method, keep proof of payment. If you pay online or by phone, print or screenshot the confirmation page. If you pay by mail, use certified mail with return receipt. If you pay in person, request a receipt. These records protect you if a payment is lost or misapplied to the wrong property.
Late Payments, Penalties, and What Happens If You Do Not Pay
Property tax payments are due 30 days from the bill issue date. If payment is not received by the due date, a penalty of 1.5 percent per month accrues on the unpaid balance, beginning the day after the due date. This penalty compounds monthly, so a $2,000 unpaid bill will owe $30 in penalties after one month, $60.45 after two months, and so on. The penalty applies whether you received the bill or not.
If property taxes remain unpaid for a full year, the Cook County Treasurer's Office may file a tax deed sale. This is a public auction of your property to recover the unpaid taxes, penalties, and costs. The process typically takes 18 to 24 months from the first missed payment, but the threat is real. If your property is sold at tax deed, you lose ownership unless you redeem the property by paying the full amount owed plus additional costs within a redemption period (which varies depending on the type of sale).
If you cannot pay the full amount by the due date, contact the Treasurer's Office immediately. Some payment plans or deferrals may be available depending on your circumstances, though these are not automatic. The Treasurer's Office is more likely to work with you if you reach out before the payment is late rather than after.
If Your Mortgage Lender Pays Your Taxes Through Escrow
Many homeowners with mortgages do not pay property taxes directly. Instead, the lender collects a portion of the property tax bill each month as part of the mortgage payment and holds it in an escrow account. When the tax bill is due, the lender pays the Treasurer on your behalf. This arrangement is common but not universal—it depends on your loan terms and whether you have a sufficient down payment.
If your lender pays your taxes, you will not receive a bill from the Treasurer. Instead, you will receive an escrow analysis statement from your lender once per year, showing how much was collected and paid. If the analysis shows that your escrow account is short, your lender may increase your monthly payment to build up the account. If there is a surplus, your lender may decrease your payment or send you a refund.
Even if your lender pays, you should verify that the payment was made on time. Request a copy of the paid tax bill from the Treasurer's Office or check your account online at cookcountytreasurer.com using your PIN. If your lender fails to pay and a penalty accrues, you may have a claim against the lender, but you are ultimately responsible for ensuring the bill is paid.
Finding Your Property Index Number and Accessing Your Tax Account Online
Your property index number (PIN) is a 14-digit identifier unique to your property. It appears on your property tax bill, your deed, and your mortgage documents. You need the PIN to pay online, by phone, or to look up your account. If you cannot find your PIN, you can search for it on the Cook County Assessor's website (cookcountyassessor.com) by entering your address, or you can call the Assessor's Office at 312-443-7550.
Once you have your PIN, you can view your tax account at cookcountytreasurer.com. The online portal shows your current bill balance, payment history, due dates, and any penalties or interest accrued. You can also set up an account to receive email notifications when a new bill is issued or when a payment is due. This is a free service and does not require you to pay online; it simply alerts you so you do not miss a due date.
The Cook County Assessor's website also allows you to view your property's assessed value, the tax rate applied to your property, and a breakdown of which taxing bodies receive a portion of your payment. Understanding this breakdown can help you see where your tax dollars go and may be useful if you want to appeal your assessment or attend a local taxing body's budget meeting.
Disputing Your Assessment or Requesting a Tax Reduction
If you believe your property's assessed value is too high, you can file a formal objection with the Cook County Assessor's Office. The objection must be filed by a specific deadline, which is typically in early summer (the exact date varies by year). You can file online through the Assessor's website or by mail. Filing does not stop you from paying your current tax bill on time; you still owe the full amount while your objection is being reviewed.
A successful objection may result in a lower assessed value, which would reduce your future tax bills. However, the process takes several months, and there is no may provide of success. You may want to hire a property tax attorney or assessor to help you build your case, especially if your property is valuable or if you believe the assessment is significantly off.
Some Cook County residents also may have access to for tax exemptions or deferrals based on age, disability, or income. These programs are administered by the Assessor's Office, not the Treasurer. Contact the Assessor's Office at 312-443-7550 to ask whether you may be may be able to access for any reduction or exemption.
Frequently Asked Questions
What if I pay my property tax bill late but before the tax deed sale?
You can pay at any time before the property is sold at tax deed auction. However, you will owe the full unpaid balance plus all penalties and interest accrued since the due date. The longer you wait, the larger the penalty grows. Paying as soon as possible after the due date minimizes what you owe.
Can I set up automatic monthly payments instead of paying twice per year?
The Cook County Treasurer does not offer automatic monthly payment plans for property taxes. You must pay when each bill is due (typically twice per year). However, if your lender collects taxes through escrow, your lender may allow you to adjust your monthly mortgage payment to spread the tax cost evenly throughout the year.
What if I receive a bill for a property I no longer own?
Contact the Cook County Assessor's Office immediately with proof that you no longer own the property (such as a deed transfer). The Assessor will update the ownership record, and future bills will go to the new owner. You are not responsible for taxes on a property you do not own, but you may need to provide documentation to prove the sale date.
Can I pay my Cook County property taxes with a credit card without a fee?
The Cook County Treasurer accepts credit and debit card payments online and by phone, but a processing fee applies (the fee amount varies and is shown before you complete the payment). Paying by check, money order, or electronic bank transfer does not incur a fee. If you want to use a credit card for rewards, factor in whether the rewards value exceeds the processing fee.
How do I know if my property is scheduled for a tax deed sale?
The Cook County Treasurer publishes a list of properties scheduled for tax deed sale on its website. You can search by PIN or address. If your property appears on the list, you still have time to pay the full amount owed plus costs to stop the sale. Contact the Treasurer's Office immediately if you see your property listed.