Southwest Gas offers three online payment methods: through your account on their website, through their mobile app, or by setting up automatic payments from your bank
The fastest route is logging into your Southwest Gas account at swgas.com and paying directly from there. You can pay with a debit card, credit card, or bank account. If you do not have an online account yet, you will need to create one using your account number (found on your bill) and either your zip code or the phone number on file.
You can also download the Southwest Gas mobile app to iOS or Android devices and pay the same way. Automatic payments let you set a recurring payment on a schedule you choose — either the full bill amount or a fixed dollar amount — so you never have to remember to pay manually.
Key Takeaways
- You can pay online at swgas.com with a debit card, credit card, or bank account transfer without creating an account if you use the one-time payment option.
- The Southwest Gas mobile app lets you pay, view your bill, and check your account balance from your phone.
- Automatic payments can be set up to deduct money from your bank account on a date you choose each month.
- Online payments typically post to your account within one business day, though payments made after 5 p.m. Mountain Time may post the next day.
- If you do not have internet access or prefer to pay by phone, Southwest Gas accepts payments at 1-877-489-4427.
Paying without logging into an account
If you want to make a one-time payment without setting up an online account, go to swgas.com and look for the "Pay My Bill" or "Make a Payment" button on the homepage. You will need your account number and the amount of your bill. Enter your payment method — debit card, credit card, or bank account — and confirm.
This route takes about five minutes and does not require you to remember a password. However, you will not be able to see your payment history or set up automatic payments this way. If you plan to pay online regularly, creating an account saves time.
Setting up an online account and logging in
Go to swgas.com and select "Create Account" or "Register." You will need your Southwest Gas account number, which appears on your paper bill or in any email from Southwest Gas. You can also find it by calling 1-877-489-4427.
After entering your account number, Southwest Gas will ask you to verify your identity using either your zip code or the phone number associated with your account. Once verified, create a username and password. Write these down or save them in a password manager so you do not lose them.
Once logged in, you can view your current bill, payment history, usage history, and account details. The "Pay Now" button is usually at the top of the page. Select your payment method, enter the amount, and confirm. You will receive a confirmation number immediately.
Using the Southwest Gas mobile app
Download the Southwest Gas app from the Apple App Store or Google Play Store. Log in with the same username and password you use on the website, or create a new account directly in the app using your account number.
The app shows your current balance, due date, and usage. Tap "Pay Bill" to make a one-time payment or set up automatic payments. You can use a debit card, credit card, or bank account. The app also sends notifications when your bill is ready and when a payment is due, which can help you avoid late fees.
Setting up automatic payments
Automatic payments remove the risk of forgetting to pay. Log into your account on swgas.com or open the mobile app, then look for "Autopay," "Automatic Payments," or "Recurring Payments" in the settings or account menu.
You will choose a payment date each month — for example, the 15th or the day after your bill is issued. You can set it to pay your full bill amount or a fixed dollar amount. Southwest Gas will deduct the payment from your bank account on that date every month until you cancel.
To cancel automatic payments, log back into your account and turn off the autopay setting, or call 1-877-489-4427. Changes usually take effect within one to two business days.
Payment timing and posting
Online payments made before 5 p.m. Mountain Time typically post to your account the same business day. Payments made after 5 p.m. Mountain Time or on weekends and holidays usually post the next business day.
Your due date does not change based on when you pay online. If your bill is due on the 20th and you pay on the 21st, you may be charged a late fee even though the payment posts quickly. Pay before your due date to avoid this. If you are unsure of your due date, check your bill or log into your account.
Troubleshooting common payment issues
If your payment is declined, the most common reasons are an expired card, insufficient funds, or a mismatch between the address on file and the address you entered. Check that your card has not expired and that your bank account has enough money. If you are using a debit or credit card, make sure the billing address matches what your card issuer has on file.
If you cannot log into your account, select "Forgot Password" on the login page and follow the steps to reset it. Southwest Gas will send a link to the email address on file. If you do not receive the email within a few minutes, check your spam folder. If you still cannot access your account, call 1-877-489-4427 and a representative can help you regain access or process a payment over the phone.
If you see a payment on your bill that you did not make, or if a payment you made does not appear after two business days, contact Southwest Gas immediately at 1-877-489-4427. Have your account number and the confirmation number from your payment ready.
Frequently Asked Questions
Is there a fee to pay my Southwest Gas bill online?
No. Southwest Gas does not charge a fee for online payments made through their website or mobile app using a bank account transfer. Some credit card processors may charge a fee if you use a credit card, but Southwest Gas itself does not add a charge for online payment.
Can I pay my bill with a credit card online?
Yes, Southwest Gas accepts credit cards online, but some credit card companies may treat this as a cash advance and charge you a fee. Check with your credit card issuer first. Paying with a debit card or bank account transfer avoids this issue.
What if I pay online but my bill shows as unpaid?
Online payments usually post within one business day. If more than two business days have passed and your payment still does not show, log into your account and look for a confirmation number from your payment. Call 1-877-489-4427 with that number so Southwest Gas can locate the payment and update your account.
Can I schedule a payment for a future date?
The standard online payment option processes immediately or the next business day. For recurring payments on a set schedule, use automatic payments instead. Some payment systems allow you to schedule a single future payment, but this varies — check the payment screen when you log in to see if that option appears.
What should I do if I need to stop an automatic payment?
Log into your Southwest Gas account on swgas.com or the mobile app and turn off the autopay setting in your account menu. Changes take one to two business days. If you need to stop a payment immediately, call 1-877-489-4427 before your scheduled payment date.