The fastest way to pay Southwest Gas is online through their website or mobile app, by phone, or by mail — each method takes a few minutes and posts to your account within one to three business days.
Southwest Gas serves customers in Arizona, Nevada, and New Mexico. The company offers several payment channels so you can choose what fits your routine. Online and mobile payments are fastest and cost nothing. Phone payments work if you prefer speaking to someone. Mail is slowest but requires no account setup.
Your bill shows a due date, usually 20 to 25 days after the bill date. Paying by the due date keeps you current and avoids late fees. If you miss the due date, Southwest Gas typically charges a late fee and may eventually disconnect your service.
Key Takeaways
- Pay online at swgas.com, through the Southwest Gas mobile app, or by phone at 1-877-860-6025 without paying a fee.
- Mail payments to the address on your bill, but allow at least 10 business days for the payment to reach and post to your account.
- Set up automatic payments (autopay) through your online account to have the bill amount deducted on your due date each month.
- If you cannot pay the full amount by the due date, contact Southwest Gas before the deadline to discuss payment arrangements or hardship programs.
- Late fees apply if payment arrives after the due date, and service disconnection can happen 30 to 60 days after a missed payment.
Paying online or through the mobile app
Log into your account at swgas.com using your account number and password. If you do not have an online account, you can create one by entering your account number and zip code. Once logged in, select "Pay My Bill" and choose the payment amount and date.
You can pay with a debit card, credit card, or bank account. Debit and credit card payments post within one business day. Bank account payments (ACH transfers) may take two to three business days. Neither method charges a fee through Southwest Gas's website.
The Southwest Gas mobile app offers the same payment options and speed. Download it from the Apple App Store or Google Play, sign in with your account credentials, and follow the same steps as the website.
Paying by phone
Call Southwest Gas at 1-877-860-6025 to pay by phone. Have your account number and payment method (debit card, credit card, or bank account) ready. A representative will process your payment while you are on the call.
Phone payments post within one to two business days. There is no fee to pay by phone. This method works well if you do not have internet access or prefer to speak with someone before sending money.
Paying by mail
Write a check or money order payable to Southwest Gas. Include your account number on the check. Mail it to the address shown on your bill — do not send payment to the corporate office, as it will be delayed.
Mail payments take 7 to 10 business days to arrive, plus another 2 to 3 business days to post to your account. Plan ahead if you pay by mail. If your payment arrives after the due date, you will be charged a late fee even if you mailed it on time.
Setting up automatic payments
Autopay removes the need to remember your due date each month. Log into your online account, go to "Billing & Payments," and select "Autopay." Choose the payment amount (full bill or a fixed amount), the payment date, and your payment method.
Payments are deducted automatically on the date you choose, usually your due date. You can change or cancel autopay anytime through your account. If your bill amount changes, the autopay amount stays the same unless you update it manually.
Autopay works with debit cards, credit cards, and bank accounts. There is no fee. This is the simplest way to stay current and avoid late fees.
What to do if you cannot pay on time
If you know you cannot pay by the due date, contact Southwest Gas before the deadline. Call 1-877-860-6025 or use the chat feature on swgas.com. Explain your situation and ask about a payment arrangement — the company may allow you to split the bill into two or more payments over a set period.
Southwest Gas also offers hardship programs for customers facing financial difficulty. These programs may include extended payment plans, bill discounts, or referrals to local assistance organizations. You must contact the company to learn what programs may be available in your situation.
If you do not contact Southwest Gas and miss the due date, a late fee is added to your next bill. If you miss multiple payments, the company may disconnect your service 30 to 60 days after the first missed payment. Reconnection requires payment of all arrears plus a reconnection fee.
Understanding your bill and due date
Your Southwest Gas bill shows the service period (the dates your meter was read), the amount due, and the due date. The due date is typically 20 to 25 days after the bill date. Some bills show a "final notice" or "disconnection notice" if you are behind on payments — these require immediate action.
The bill also lists your account number in the upper right corner. Use this number when paying by phone, mail, or online. If you lose your bill, you can find your account number by logging into swgas.com or calling 1-877-860-6025.
Your bill may include charges for natural gas usage, delivery fees, taxes, and other adjustments. If you have questions about specific charges, contact Southwest Gas customer service. Do not delay payment while disputing a charge — pay on time and ask about the charge separately.
Frequently Asked Questions
Is there a fee to pay my Southwest Gas bill online?
No. Southwest Gas does not charge a fee for online, mobile app, or phone payments. Mail payments are also free, but they take longer to post. Some third-party payment processors may charge a fee if you use their service instead of Southwest Gas's official channels.
How long does it take for my payment to show up on my account?
Online and mobile app payments post within one business day. Phone payments post within one to two business days. Bank account (ACH) payments may take two to three business days. Mail payments take 7 to 10 days to arrive plus 2 to 3 days to post, so plan at least two weeks ahead.
What happens if I pay after the due date?
A late fee is added to your next bill. If you continue to miss payments, Southwest Gas may disconnect your service 30 to 60 days after the first missed payment. Reconnection requires payment of all past-due amounts plus a reconnection fee.
Can I set up autopay with a credit card?
Yes. Autopay accepts debit cards, credit cards, and bank accounts. Choose your preferred payment method when you set up autopay in your online account. You can change the payment method anytime.
What should I do if I think my bill is wrong?
Contact Southwest Gas customer service at 1-877-860-6025 to discuss the charge. Pay your bill on time while the issue is being reviewed — late fees apply even if you are disputing an amount. The company will investigate and adjust your bill if an error is found.