Casper's online bill payment system lets you pay water, sewer, and city utility charges from your computer or phone without visiting an office or mailing a check.

The City of Casper operates a bill payment portal where you can view your account, set up one-time payments, and arrange automatic recurring payments. You'll need your account number (printed on your bill) and a valid payment method — debit card, credit card, or bank account transfer. Payments typically post within one to two business days, though the city charges a convenience fee for credit and debit card payments.

This guide walks you through the payment process, explains what fees apply, and shows you how to avoid common mistakes that delay your payment or create confusion with your account.

Key Takeaways

  • You can pay Casper water and utility bills online through the city's official portal using your account number and a debit card, credit card, or bank account.
  • Credit and debit card payments include a convenience fee (the exact percentage varies), but bank account transfers typically have no fee.
  • Automatic recurring payments save time if your bill amount stays roughly the same month to month, but you should still review your bill each month to catch errors.
  • Payments usually post within one to two business days, so plan ahead if your due date is approaching.
  • If you cannot pay the full amount, contact the City of Casper directly to discuss payment plans or hardship options before your bill becomes overdue.

How to access the Casper bill payment portal

Visit the City of Casper's official website and look for the utility billing or online payment section. You will need to enter your account number, which appears on your printed bill in the upper right corner or top left, depending on your bill format. If you do not have a bill handy, you can call the Casper Utilities Department at (307) 235-8200 to confirm your account number before you start.

Once you log in, the portal displays your current balance, due date, and payment history. Review the balance carefully — if it looks wrong, do not pay yet. Contact the city to clarify the charge before submitting payment, because paying an incorrect amount can create confusion when the error is later corrected.

Payment methods and fees

The city accepts three payment methods through its online portal: debit card, credit card, and bank account transfer (ACH). Each carries different costs.

Credit and debit card payments include a convenience fee charged by the payment processor. This fee is a percentage of your payment amount and is added to your total charge — it is not included in your bill. The exact percentage varies depending on the processor the city uses at any given time, so check the portal before you confirm payment to see the fee amount.

Bank account transfers (ACH) typically have no fee and are the cheapest way to pay if your bank account is linked to the portal. The transfer takes one to two business days to post, so initiate it a few days before your due date to avoid a late payment.

One-time payments versus automatic recurring payments: You can pay once for a single bill, or set up automatic payments that deduct the same amount on the same day each month. Automatic payments are convenient, but your bill amount may change seasonally (water use often rises in summer), so review your bill each month to make sure the automatic amount is still correct.

What happens after you submit payment

Once you submit payment through the portal, you will receive a confirmation number on screen and usually via email. Save this number — it proves you paid and when. The payment typically posts to your account within one to two business days, though bank transfers may take slightly longer if your bank processes them slowly.

If your payment does not appear on your account within three business days, log back into the portal and check the payment history section. If the payment still shows as pending, contact the Casper Utilities Department. Have your confirmation number ready.

Late payments and what to do if you cannot pay in full

If your bill is due and you cannot pay the full amount, contact the City of Casper Utilities Department before the due date. The city may offer a payment plan that spreads your balance over several months, or it may discuss hardship options depending on your situation. Calling ahead is much better than letting the bill go unpaid — unpaid utility bills can result in service disconnection and damage to your credit.

The Casper Utilities Department phone number is (307) 235-8200. Have your account number ready when you call, and be prepared to explain your situation. The city handles these conversations regularly and can often work with you if you reach out before the account becomes severely overdue.

How to set up automatic payments

Log into the bill payment portal and look for an option to set up recurring or automatic payments. You will select your payment method (bank account transfer is recommended to avoid fees), the amount you want to pay each month, and the day of the month the payment should be deducted.

Choose a payment date that gives you time to review your bill first — for example, if your bill is due on the 20th, set the automatic payment for the 18th. This gives you two days to spot any errors and cancel the payment if needed. After you set it up, the system will send you a confirmation, and you should receive a reminder email before each automatic payment is processed.

Even with automatic payments, check your bill each month. Automatic payments are set to a fixed amount, but your actual bill may vary. If your bill is consistently higher or lower than your automatic payment, log back in and adjust the amount to match your actual usage.

Troubleshooting common payment problems

Payment rejected: If your card or bank account is declined, the portal will show an error message. Common reasons include an expired card, insufficient funds, or a mismatch between the address on your account and the address on your payment method. Update your payment information and try again. If the problem persists, contact your bank or card issuer to confirm the account is active and has no fraud blocks.

Duplicate or missing payments: If you submitted a payment and it does not appear after three business days, check the payment history in the portal first. If it shows as completed but your bill balance has not changed, contact the city — the payment may be in a processing queue. If the payment does not appear in the history at all, you may need to resubmit it. Do not submit the same payment twice without confirming the first one failed.

Automatic payment deducted the wrong amount: If an automatic payment was for more or less than expected, log into the portal and review the amount you set up. If it is wrong, cancel the recurring payment and set up a new one with the correct amount. Contact the city if you were overcharged and need a refund.

Frequently Asked Questions

Can I pay my Casper water bill by phone?

The City of Casper Utilities Department accepts phone payments. Call (307) 235-8200 during business hours. You will need your account number and a payment method ready. Phone payments may also include a convenience fee, so ask about the cost before you provide your payment information.

What if I pay online but my bill shows as unpaid the next day?

Online payments typically take one to two business days to post. If your payment was submitted yesterday, it is likely still processing. Check the portal again in a day or two. If more than three business days have passed, contact the Casper Utilities Department with your confirmation number to track the payment.

Can I set up automatic payments for a different amount each month?

The automatic payment system is designed for a fixed amount each month. If your bill varies significantly (for example, higher in summer due to water use), you can either pay manually each month or set the automatic payment to a conservative amount and pay the difference manually when the bill arrives. Alternatively, contact the city to ask if they offer budget billing, which averages your annual costs into equal monthly payments.

Is there a way to avoid the credit card convenience fee?

Yes. Use a bank account transfer (ACH) instead of a credit or debit card. Bank transfers typically have no fee and take one to two business days to post. If you do not want to link your bank account, you can mail a check to the city, though that takes longer and you lose the convenience of online payment.

What should I do if I think my bill is wrong?

Contact the Casper Utilities Department before you pay. Have your account number and bill ready, and explain what looks incorrect — for example, a sudden spike in charges or a charge you do not recognize. The city can review your account and correct errors. Paying first and disputing later makes the process slower and more complicated.