CNG's online bill payment system lets you pay from your computer or phone without writing a check or calling in
Southern Connecticut Gas (CNG) offers online bill payment through their website and mobile app. You can set up a one-time payment or recurring automatic payments, and most payments post within one to two business days. The system accepts bank account transfers and credit or debit cards, though card payments may carry a processing fee.
To get your free guide, you need your CNG account number (found on your bill), a valid email address, and either a bank account or card. The whole setup takes about five minutes. Once you enroll, you can pay any time without logging in to your utility account — some people set it and forget it with autopay, while others prefer to pay manually each month.
Key Takeaways
- You can pay online through CNG's website or mobile app using a bank account or card, with most payments reaching your account in one to two business days.
- Autopay (automatic recurring payments) removes the need to remember your due date, though you can cancel or change the amount at any time.
- Bank account payments typically have no fee, while credit and debit card payments usually charge a processing fee of 2 to 3 percent.
- You need your account number from your bill and a valid email address to enroll in online payment.
- If you miss a payment or want to dispute a charge, contact CNG directly — the payment processor cannot reverse transactions.
How to enroll in CNG online bill pay
Start by visiting CNG's website and looking for the "Pay My Bill" or "Online Payments" link, usually in the top navigation or under "Account" options. Click through to the payment portal and select "New User" or "Enroll." You will be asked to enter your account number, which appears on your bill near the top left or right side.
Next, create a login username and password for the payment portal. This is separate from any CNG account login you may already have. Provide a valid email address — CNG will send payment confirmations and reminders here. Choose whether you want to pay by bank account or card. If you choose a bank account, you will need your routing number and account number; if you choose a card, you will need the card number, expiration date, and CVV.
Review the terms and submit. You should receive a confirmation email within minutes. Keep this email for your records. Your first payment can usually be made immediately, though some banks take up to one business day to process the transfer.
One-time payments versus autopay
A one-time payment means you log in or call each month to pay your bill manually. This gives you full control over the amount and timing, and you can see your balance before deciding how much to pay. One-time payments are useful if your bill varies significantly or if you want to review charges before paying.
An autopay (automatic recurring payment) withdraws money from your bank account or card on a date you choose — usually a few days before your due date. You set the amount once, and it repeats each billing cycle. Autopay removes the risk of forgetting a payment and triggering a late fee. You can change the amount, pause, or cancel autopay at any time through your online account or by calling CNG.
If you choose autopay, make sure your bank account or card has enough funds on the payment date. If a payment fails, CNG will typically send a notice and may charge a late fee. You can then pay manually or update your payment method and try again.
Payment methods and fees
CNG accepts two main payment methods online: bank account transfer and card (credit or debit). Bank account transfers are the cheapest option — there is typically no fee, and the money moves directly from your checking or savings account. This method takes one to two business days to post.
Credit and debit card payments usually charge a processing fee, typically 2 to 3 percent of the payment amount. A $100 payment might cost $2 to $3 in fees. Some people use cards only when they need to pay quickly or want to earn rewards, accepting the fee as a trade-off. Check your card's rewards program — some cards offer cash back on utility payments, which can offset the fee.
CNG does not accept cash, checks, or money orders through the online system. If you prefer those methods, you can mail a check to the address on your bill or pay in person at a CNG office or authorized payment location.
What to do if your payment doesn't go through
If a payment fails, CNG will send you a notice by email or mail, usually within a few days. Common reasons include insufficient funds, an expired card, or a closed bank account. Check your email first — the notice will explain why the payment was rejected.
Log back into your online account and try again with a different payment method or updated information. If you used a card, make sure the expiration date and CVV are current. If you used a bank account, confirm the account is still active and has funds available. You can also call CNG directly to discuss payment options or set up a manual payment over the phone.
If you are unable to pay your full bill, contact CNG about a payment plan or hardship program. Many utilities offer extended payment arrangements or bill assistance for customers facing financial difficulty. Do not ignore the bill — late payments trigger fees and can eventually lead to service disconnection.
Keeping your payment information secure
CNG's payment portal uses encryption to protect your banking and card information. Look for "https://" and a padlock icon in your browser's address bar — this means the connection is secure. Never share your login credentials with anyone, and do not use the same password as your email or other accounts.
If you use a shared computer, log out completely when you finish paying. Clear your browser history if you are concerned about others seeing your activity. On a mobile phone, use the official CNG app rather than a web browser when possible — apps are generally more secure than websites.
If you suspect fraud or unauthorized charges, contact CNG immediately. The payment processor cannot reverse a transaction once it posts, but CNG can investigate and may be able to help. Keep your confirmation emails as proof of payment in case you need to dispute a charge later.
Troubleshooting common online payment problems
If you forget your password, click "Forgot Password" on the login page. CNG will send a reset link to your email. If you do not receive the email, check your spam folder or contact CNG support.
If you cannot find your account number, look at your most recent bill — it appears near the top. If you have lost your bill, call CNG and provide your name, address, and phone number. They will give you the account number over the phone.
If the payment portal is down or you see an error message, try again in a few minutes. If the problem persists, use the CNG mobile app or call customer service to pay by phone. CNG's website status page or social media accounts usually post notices about planned maintenance or outages.
Frequently Asked Questions
How long does it take for an online payment to show up on my account?
Bank account payments typically post within one to two business days. Card payments may take slightly longer. If you pay close to your due date, the payment may not post in time to avoid a late fee, so plan ahead. You will receive a confirmation email immediately after submitting payment, even if the money has not yet reached CNG.
Can I set up autopay and still make extra payments when I want?
Yes. Autopay handles your regular monthly payment, and you can make additional one-time payments anytime through your online account. This is useful if you want to pay down your balance faster or if you receive a bill adjustment. Log in and select "Make a Payment" to add a one-time payment on top of your autopay amount.
What happens if I set up autopay but my account gets paid off early?
If your balance reaches zero before your autopay date, CNG will not charge you. The system recognizes a zero balance and skips the payment. If you have a credit balance (CNG owes you money), that credit will apply to your next bill. Check your account online a few days before your autopay date if you think your balance might be zero.
Is there a fee to use CNG's online payment system?
There is no fee to enroll or use the system itself. Bank account payments have no processing fee. Card payments charge a fee (usually 2 to 3 percent) that goes to the payment processor, not to CNG. You will see the fee amount before you confirm the payment, so you can decide whether to proceed.
Can I pay someone else's CNG bill online?
You can pay a bill if you have the account number and are authorized by the account holder. The online system does not require you to be the account owner, but CNG recommends that the account holder enroll in online payments themselves for security. If you are paying on behalf of someone else, ask them for their account number and set up a separate enrollment under your own email address.