UniSource Energy bill payment options and where to send payments

UniSource Energy serves customers in southern Arizona through two utilities: Tucson Electric Power (TEP) and Arizona Gas and Electric (AzGE). You can pay your bill online through their website, by phone, by mail, or in person at payment centers. The fastest way is online — payments post the same day if submitted before the cutoff time, usually around 5 p.m. Arizona time on business days.

If you pay by mail, send your check or money order to the address printed on your bill. Mail payments typically take 7 to 10 business days to reach UniSource and post to your account, so plan ahead to avoid late fees. Never send cash through the mail.

You can also set up automatic payments from your bank account or pay by phone by calling the customer service number on your bill. Phone payments may carry a small fee depending on the payment method you choose.

Key Takeaways

  • Online payments through UniSource's website post the same day if submitted before the cutoff time on business days.
  • Mail payments take 7 to 10 business days to arrive and post, so send them at least two weeks before your due date to avoid late fees.
  • You can set up automatic monthly payments from your bank account to avoid missing due dates.
  • Phone payments are available by calling the number on your bill, though some payment methods may include a fee.

Paying online through UniSource's website

Go to the UniSource Energy website and look for the "Pay My Bill" or "Make a Payment" button, usually located on the homepage. You will need your account number, which appears on your bill, and a valid payment method — debit card, credit card, or bank account information.

Enter your account number and the amount you want to pay. Review the payment details carefully before confirming. Once submitted, you will receive a confirmation number. Save this number in case you need to reference the payment later. The payment posts to your account immediately, though it may take one business day to appear in your online account history.

If you are paying a bill that is already past due, online payment still works the same way. The payment will be credited to your account, but late fees that have already been added to your bill will not be removed automatically — you may need to contact UniSource to discuss those charges.

Setting up automatic payments to avoid missed due dates

Automatic payments pull money from your bank account on a date you choose each month, usually around your bill's due date. To set this up, log into your UniSource account online or call customer service. You will provide your bank account number and routing number, and choose whether you want to pay the full bill amount or a fixed amount each month.

Automatic payments are free when you use a bank account (not a credit or debit card). Once set up, the payment happens without you having to do anything, which means you will never miss a due date. You can change or cancel the automatic payment anytime through your online account or by calling customer service.

If your bill amount varies significantly month to month, you can set the automatic payment to cover your average bill, then pay any difference manually when the actual bill arrives. This gives you flexibility while still protecting you from late fees on at least part of the balance.

Mailing a check or money order to UniSource

Write your account number on the check or money order. Include the payment stub from your bill if you have it — this helps UniSource match the payment to your account faster. Mail your payment to the address printed on your bill.

UniSource typically has different mailing addresses for TEP and AzGE customers, so check your bill to use the correct one. Mail takes 7 to 10 business days to arrive, and UniSource may need another 1 to 2 business days to process and post the payment. If your due date is within two weeks, do not rely on mail — use online payment or phone payment instead.

Keep a record of when you mailed the payment. If you are concerned the payment did not arrive, you can check your account online after 10 business days to confirm it posted. If it did not, contact UniSource with your mailing date and check number.

Paying by phone or at a payment center

Call the customer service number on your bill to pay by phone. You will need your account number and a payment method ready. Phone payments may include a fee if you use a credit card, though bank account payments are usually free. The payment posts to your account the same day if you call before the cutoff time.

Some UniSource customers can also pay in person at authorized payment centers in the Tucson area. These locations accept cash, checks, and cards. Call customer service to find the nearest payment center and confirm their hours, as locations and hours change.

Understanding late fees and what happens if you miss a due date

Your bill shows a due date, usually 15 to 20 days after the bill is issued. If payment is not received by that date, UniSource adds a late fee to your account. The fee amount varies but is typically a percentage of your bill or a flat amount — check your bill or account online to see what UniSource charges.

If you miss a payment, your account will show as past due. UniSource may send you a reminder notice, and if the balance remains unpaid for 30 to 60 days, they may threaten to disconnect your service. If you cannot pay the full amount, contact UniSource immediately to discuss a payment plan or other options. Many utilities offer extended payment arrangements for customers facing hardship.

Paying online or setting up automatic payments eliminates the risk of missing a due date because of mail delays or forgetfulness. If you have a history of late payments, automatic payment is the simplest way to stay current.

Reading your UniSource bill to find the due date and account number

Your UniSource bill is organized into sections. The account number appears near the top, usually in the upper right corner. The due date is also near the top, often labeled "Due Date" or "Payment Due By." The amount due is displayed prominently, usually in a box or highlighted section.

The bill also shows your service address, the billing period (the dates the bill covers), and a breakdown of charges by category — generation and transmission, distribution, and any taxes or surcharges. If you have questions about specific charges, you can reference the line items when you call customer service.

Keep your bill or take a photo of it before you pay, so you have the account number and due date for future reference. If you receive your bill by email, save the PDF or take a screenshot.

Frequently Asked Questions

What time do online payments need to be submitted to post the same day?

Online payments submitted before 5 p.m. Arizona time on a business day typically post the same day. Payments submitted after 5 p.m. or on weekends and holidays post the next business day. Check the UniSource website for the exact cutoff time, as it may vary.

Can I pay someone else's UniSource bill if I have their account number?

Yes, you can pay another person's bill online or by phone if you have their account number. The payment will be credited to that account. However, you cannot view their account details or make changes to their service without authorization from the account holder.

What should I do if my online payment was submitted but never posted to my account?

Wait one business day after submission, then log into your account to check if the payment appears. If it does not, contact UniSource customer service with your confirmation number. They can trace the payment and confirm whether it was received and processed.

Is there a fee for paying my UniSource bill online?

No fee applies when you pay online using a bank account. If you use a credit or debit card, UniSource may charge a convenience fee. Check the payment screen before confirming to see if a fee applies to your chosen payment method.

Can I set up automatic payments for just part of my bill?

Yes, you can set automatic payments for a fixed amount each month, even if it is less than your full bill. This works well if your bill varies and you want to cover a base amount automatically while paying the difference manually when the bill arrives.