Southwest Gas's online payment portal lets you pay from your computer or phone without calling or mailing a check
Southwest Gas operates swgas.com, where you can log into your account and pay your bill immediately using a bank account, debit card, or credit card. The payment goes through the same day you submit it if you pay before the cutoff time (usually 5 p.m. Mountain Time on business days). You do not need to set up anything in advance — you can pay as a guest using just your account number and ZIP code.
The site also lets you set up automatic payments, view your bill history, check your usage, and report problems. If you have never used the portal before, the first login requires your account number (on your bill) and the ZIP code associated with your account.
Key Takeaways
- You can pay a one-time bill on swgas.com without logging in by using your account number and ZIP code as a guest.
- Payments submitted before the daily cutoff (usually 5 p.m. Mountain Time) post the same business day; payments after that cutoff post the next business day.
- Setting up automatic payments through your bank account avoids late fees and takes only a few minutes on the portal.
- If you cannot access the website, you can pay by phone at 1-888-749-7243 or by mail, though both take longer than online payment.
Paying as a guest without creating an account
If you want to pay once without setting up a login, go to swgas.com and look for the "Pay My Bill" or "Make a Payment" button on the homepage. You will be asked for your account number (a 10-digit number on your bill) and the ZIP code on file. Enter the amount you want to pay and choose your payment method: bank account, debit card, or credit card.
Bank account payments are free. Debit and credit card payments carry a fee that Southwest Gas discloses before you confirm the payment — the fee varies depending on the card type and the payment processor. After you submit, you will receive a confirmation number. Write it down or take a screenshot; you will need it if you need to track the payment later.
Creating a login and setting up automatic payments
To create an account on swgas.com, click "Register" or "Create Account" and enter your account number, email address, and a password. Southwest Gas will send a verification email — click the link to confirm. Once you are logged in, you can set up automatic payments so your bill is paid on a date you choose each month.
Automatic payments pull from your bank account (no fee) or a card (with a fee). You choose the payment date, and Southwest Gas will deduct the amount due on that day. If your bill amount changes month to month, you can set it to pay the full amount due or a fixed amount. You can pause or cancel automatic payments anytime from your account settings.
What to do if your payment does not show up
Payments submitted before the cutoff time on a business day appear in your account the same day. If you paid after hours or on a weekend, the payment posts the next business day. Check your account on swgas.com a day after you submit to confirm it went through — look for the payment in your transaction history.
If a payment you made more than two business days ago still does not appear, or if you see a duplicate charge, contact Southwest Gas at 1-888-749-7243. Have your confirmation number ready. The company can trace the payment and correct any errors, though this may take a few business days.
Paying by phone or mail if you cannot use the website
If swgas.com is down or you do not have internet access, you can pay by phone at 1-888-749-7243. A representative will take your payment information over the phone. Phone payments are available 24/7, but the payment may take longer to post than an online payment.
You can also mail a check to the address on your bill. Write your account number on the check and mail it to the address listed in the "Pay Your Bill" section of your statement. Mail payments typically take 7 to 10 business days to post, so send them early if your due date is coming up.
Avoiding late fees and service interruption
Your due date appears on your bill. If you pay after that date, Southwest Gas may charge a late fee. Paying online before your due date is the fastest way to avoid this. If you are having trouble paying your bill, Southwest Gas offers budget billing (which spreads your costs evenly across the year) and hardship programs for customers facing financial difficulty — call 1-888-749-7243 to ask about these options.
If your bill goes unpaid for a certain period (the exact number of days varies by state), Southwest Gas may disconnect your service. Paying online or by phone immediately can prevent this. If your service has already been shut off, you will need to pay the full amount due plus a reconnection fee to restore it.
Checking your bill and usage on swgas.com
Once you log into your account, you can view your current bill and past bills going back several months. The bill shows your usage, the rate you were charged, and any taxes or fees. You can also see a graph of your usage over time, which helps you spot unusual spikes that might signal a leak or a problem with your appliances.
If your bill looks wrong, you can report it through your account or by calling 1-888-749-7243. Keep a copy of your bill for your records, especially if you dispute a charge.
Frequently Asked Questions
Can I pay my Southwest Gas bill with a credit card without a fee?
No. Credit card payments carry a fee that Southwest Gas discloses at checkout. Bank account payments are free. If you want to avoid the fee, use your bank account or pay by mail, though mail takes longer to post.
What happens if I set up automatic payments and my bill is higher than usual?
If you set automatic payments to the full amount due, your account will be charged whatever the bill is that month — higher or lower. If you set a fixed amount, you may underpay in cold months when heating use is high. You can adjust your automatic payment amount anytime in your account settings.
Is swgas.com secure for entering my bank account information?
Southwest Gas uses encryption to protect your information. Your bank account and card details are not stored on the site after the payment is processed. If you are uncomfortable entering your information online, you can pay by phone or mail instead.
How do I know if my payment went through?
You will receive a confirmation number immediately after you submit a payment online. Check your account on swgas.com the next business day — your payment should appear in your transaction history. If it does not, contact Southwest Gas at 1-888-749-7243 with your confirmation number.
Can I pay someone else's Southwest Gas bill online?
You can pay a bill if you have the account number and ZIP code, but Southwest Gas may not allow you to set up a login for an account that is not in your name. Call 1-888-749-7243 to ask about paying another person's bill or to arrange a one-time guest payment on their behalf.