How to Pay Your Southwest Gas Bill Online, by Phone, or Mail

The fastest way to pay Southwest Gas is through their online account portal or mobile app, where you can set up a one-time payment or automatic monthly payments

Southwest Gas serves customers in Nevada, Arizona, and New Mexico. You can pay your bill the same day you receive it, or set up automatic payments so the bill comes out of your bank account on a date you choose. The company does not charge extra fees for online or phone payments, but some payment methods (like credit cards through third-party processors) may add a small fee that you see before confirming.

Your account number appears on your bill and in any past statements. You will need it to pay by phone or to set up automatic payments. If you pay online through Southwest Gas directly, you can usually use just your account number or your phone number associated with the account.

Key Takeaways

• Southwest Gas's online portal and mobile app let you pay when ready without fees, and you can schedule payments for a future date if you want to time them with your paycheck.
• Automatic payments remove the need to remember a due date each month and can be set up or changed anytime through your online account.
• Phone payments through Southwest Gas's customer service line take a few minutes and work if you do not have internet access or prefer speaking to someone.
• Mailing a check or money order takes 7 to 10 business days to reach Southwest Gas, so send it well before your due date to avoid a late payment.
• Third-party payment processors (like PayPal or credit card companies) may charge a convenience fee that Southwest Gas does not control.

Paying online through your Southwest Gas account

Go to the Southwest Gas website and select "Pay My Bill" or "Login to My Account." Enter your account number and the phone number or email address on file. Once you are logged in, you will see your current balance and due date.

Click the option to make a payment. You can choose to pay the full balance, a partial amount, or the minimum due. Select your payment method (bank account or debit card), enter the account or card details, and choose whether to pay when ready or on a specific future date. The system will show you a confirmation screen with the amount and date before you submit. Once submitted, you will receive a confirmation number by email or on screen.

Payments made before 5 p.m. Mountain Time on a business day usually post the same day. Payments made after hours or on weekends post the next business day. If you set a future payment date, Southwest Gas will process it automatically on that date.

Setting up automatic monthly payments

Automatic payments mean your bill comes out of your bank account on the same day each month, so you never have to remember to pay. Log into your Southwest Gas account online, go to "Billing" or "Payment Settings," and select "Enroll in AutoPay" or "Set Up Automatic Payments."

Choose the date you want the payment to come out each month (usually between the 1st and the 28th). You can select whether to pay the full bill amount or a fixed dollar amount. Southwest Gas will send you a confirmation email, and you can change or cancel the automatic payment anytime through your account.

If your bill varies month to month (as most utility bills do), you can set the payment to be the full current balance, and it will adjust automatically. If you prefer a fixed amount, make sure it covers your typical bill so you do not fall behind.

Paying by phone

Call Southwest Gas customer service at 1-702-709-9833 (Nevada), 1-602-371-2727 (Arizona), or 1-575-526-6000 (New Mexico). A representative will ask for your account number and the amount you want to pay. Have your bank account or debit card information ready.

Phone payments are processed the same way as online payments — when ready if you call during business hours on a weekday, or the next business day if you call after hours or on a weekend. You will receive a confirmation number at the end of the call. Write it down or ask the representative to email it to you.

Southwest Gas does not charge a fee for phone payments made directly through their customer service line. If you use a third-party payment processor accessed by phone, that processor may charge a fee.

Paying by mail

Write a check or money order for the amount due and include your account number on the check. Mail it to the address shown on your bill — Southwest Gas has different mailing addresses for Nevada, Arizona, and New Mexico customers, so use the one on your statement.

Mail payments take 7 to 10 business days to arrive and be processed. Send your payment at least two weeks before your due date to make sure it arrives on time and avoids a late fee. Keep a copy of the check or a photo of the front and back for your records.

Do not mail cash. If you do not have a checking account, use a money order from a grocery store, bank, or post office. Money orders cost a small fee (usually $1 to $3) but provide a receipt and tracking number.

What to do if you cannot pay the full amount

If you cannot pay your full bill by the due date, contact Southwest Gas before the due date to discuss your options. You may be able to set up a payment plan that spreads the balance over several months, though this may include a small fee or interest depending on your account history and the amount owed.

Southwest Gas can also connect you with local information programs if you are facing hardship. Ask the representative about programs in your state — Nevada, Arizona, and New Mexico each have different resources, and Southwest Gas can tell you which ones you may be able to contact.

Paying even a partial amount before the due date shows good faith and may help if you need to negotiate a plan. Late payments can result in a reconnection fee if your service is shut off, so reaching out early is better than waiting.

Frequently Asked Questions

Can I pay my Southwest Gas bill with a credit card?

You can pay with a debit card through Southwest Gas's website or phone line at no extra charge. Credit card payments may be available through third-party processors, but those processors typically charge a convenience fee of 2 to 3 percent. Check the fee before you confirm the payment.

What if I pay online but my payment does not show up right away?

Payments made during business hours on weekdays usually post the same day. Payments made after 5 p.m. Mountain Time or on weekends post the next business day. If more than one business day has passed and the payment still does not appear, call customer service with your confirmation number and they can look it up in their system.

Can I change or cancel an automatic payment I already set up?

Yes. Log into your Southwest Gas account, go to your payment settings, and select the automatic payment to edit or remove it. Changes take effect on your next scheduled payment date. If you need to cancel before then, call customer service to make sure the upcoming payment does not process.

Is there a fee for paying my bill online?

Southwest Gas does not charge a fee for online payments made through their website or mobile app using a bank account or debit card. Third-party payment processors may charge a fee, which they will show you before you confirm the payment.

What happens if my payment is late?

Late payments may result in a late fee added to your next bill. If your account falls significantly behind, Southwest Gas may shut off your service and charge a reconnection fee to turn it back on. Contact Southwest Gas as soon as you know you will be late — they may work with you on a payment plan.