How to pay your Illinois American Water bill online, by phone, or by mail
Illinois American Water lets you pay your bill through their website, by phone, through automatic bank withdrawals, or by mailing a check. The fastest method is online through your account at illinoisamericanwater.com — you can pay immediately without waiting for mail delivery. If you prefer not to use the website, you can call their customer service line or set up autopay so the payment happens without you having to remember each month.
Your bill arrives by mail or email depending on what you chose when you set up your account. The due date is printed on the front of the bill, usually 15 to 20 days after the bill date. Paying after the due date triggers a late fee, which appears on your next bill.
Key Takeaways
- Pay online at illinoisamericanwater.com using your account number and password, or set up a one-time guest payment if you do not have an account.
- Automatic bank withdrawals (autopay) prevent missed payments and require you to set them up once through your online account or by calling customer service.
- Phone payments go through their automated system or a representative, and you will need your account number and a payment method ready.
- Mailed checks should be sent to the address on your bill at least one week before the due date to arrive on time.
- Late fees apply if payment is not received by the due date, so confirm your payment method reaches them before that date.
Paying online through your account
Go to illinoisamericanwater.com and select "Pay My Bill" or "Login" at the top of the page. Enter your account number and password. If you do not have an online account, you can create one by selecting "Register" and providing your account number, service address, and email. Once you are logged in, your bill balance appears on the dashboard.
Click "Make a Payment" and enter the amount you want to pay. You can pay the full balance, a partial amount, or set up a future-dated payment if your bill is not due for several days. Choose your payment method — debit card, credit card, or bank account. Credit card payments may include a processing fee, which the website will show you before you confirm. Bank account payments (ACH) usually have no fee. Review the confirmation screen, then submit.
You will receive a confirmation number immediately. The payment posts to your account within one business day for bank transfers and same-day for card payments. Keep the confirmation number in case you need to reference the transaction later.
Setting up automatic payments (autopay)
Autopay withdraws your bill amount from your bank account on a date you choose each month, usually around your due date. This prevents late fees from missed payments and removes the step of paying manually. Log into your account at illinoisamericanwater.com, go to "Account Settings" or "Billing," and look for "Autopay" or "Automatic Payments."
Select your bank account as the payment method and choose the day of the month you want the payment to come out. Most customers choose the due date or a few days before. You can change or cancel autopay anytime through your account, and you will receive an email confirmation when the payment processes each month.
If you do not have an online account or prefer to set up autopay by phone, call Illinois American Water customer service at the number on your bill and ask to enroll. You will need to provide your bank account number and routing number.
Paying by phone
Call the customer service number on your bill. An automated system will ask for your account number and guide you through payment options. You can pay with a debit card, credit card, or bank account. If you prefer to speak with a representative, you can stay on the line or select that option when prompted.
Phone payments process immediately, and you will receive a confirmation number. Credit card payments may carry a processing fee. Have your payment method information ready before you call so the process moves quickly.
Paying by mail
Write a check or money order payable to Illinois American Water. Include your account number on the check. Mail it to the address printed on your bill — this address is specific to your service area and ensures the payment reaches the right location.
Mail your payment at least one week before the due date to account for delivery time. Payments are considered received on the date they arrive at Illinois American Water, not the date you mail them. If your payment arrives after the due date, a late fee will be added to your next bill.
What happens if you miss a payment
If payment is not received by the due date, Illinois American Water adds a late fee to your account. The amount of the fee varies but is shown on your next bill. You can still pay the full amount owed, including the late fee, through any of the payment methods above.
If you fall behind on multiple bills, the company may send a disconnect notice warning that service will be shut off if payment is not made within a set timeframe (usually 10 to 15 days). If you are struggling to pay, contact customer service before the disconnect date — some programs may be available to help you keep service active while you catch up.
Understanding your bill and account number
Your account number appears at the top of your bill and in your online account. You need this number to pay online, by phone, or to set up autopay. If you cannot find your account number, check your bill or log into your online account. The number is also on any past bills you have received.
Your bill shows the amount due, the due date, and the service address. It also lists your water usage for the billing period and any adjustments or credits applied to your account. If you have questions about what you are being charged, you can review the detailed breakdown on your bill or contact customer service.
Frequently Asked Questions
Can I pay my bill without creating an online account?
Yes. You can pay by phone, mail, or through a one-time guest payment on the website. For a guest payment, go to illinoisamericanwater.com, select "Pay My Bill," and choose "Pay as Guest." You will enter your account number and service address instead of logging in.
Is there a fee to pay online or by phone?
Bank account payments (ACH) have no fee. Credit and debit card payments may include a processing fee, which the website or phone system will show you before you confirm the payment. The fee is typically 2 to 3 percent of the payment amount.
How long does it take for a mailed check to post?
Mailed payments are recorded on the date they arrive at Illinois American Water, which is usually 5 to 10 business days after you mail them. If the due date falls within that window, the payment may be late. Mail your check at least one week early to be safe.
What should I do if I cannot pay my full bill by the due date?
Contact Illinois American Water customer service before the due date. You may be able to set up a payment plan, request a brief extension, or learn about programs that help with water bills. Calling before you miss the due date is better than waiting, as it shows good faith and may prevent a late fee.
Can I change my payment method after I set up autopay?
Yes. Log into your account, go to "Account Settings" or "Billing," and update your payment method. Changes take effect on your next scheduled payment. You can also call customer service to make changes by phone.