Call Green Mountain Energy customer service at 1-866-222-9891 to pay your bill over the phone
Green Mountain Energy's phone payment line is available during business hours. You will need your account number (found on your bill) and a payment method ready — either a checking account, savings account, or debit card. The representative will process the payment while you are on the call, and you will receive a confirmation number.
Phone payments typically post to your account within one business day. If you are calling close to your due date, confirm with the representative that the payment will arrive on time. Some customers prefer phone payments because they can ask questions about their bill or account at the same time.
Key Takeaways
- Green Mountain Energy's phone payment number is 1-866-222-9891, and you need your account number and a bank account or debit card to pay.
- Phone payments usually post within one business day, so call at least one day before your due date if you are cutting it close.
- You will receive a confirmation number on the call, which you should keep for your records.
- If you prefer not to call, Green Mountain Energy also accepts payments online through their website and by mail.
- Late fees apply if payment does not arrive by the due date shown on your bill, regardless of the payment method you choose.
What information you need before calling
Gather these details before you dial so the call moves quickly. Your account number appears on your bill in the upper right corner or near your name. If you cannot find it, you can look it up on the Green Mountain Energy website using your email address and password.
Have your payment method ready: either your checking or savings account number and routing number, or your debit card number and expiration date. The representative will ask for the last four digits of your Social Security number or date of birth to verify your identity. Write down the confirmation number the representative gives you — this is your proof of payment.
When to call to avoid late fees
Your due date is printed on your bill. If you are paying by phone, call at least one business day before that date. Payments made on the due date itself may not post in time, and Green Mountain Energy will charge a late fee even if you called to pay.
If you have already missed your due date, call anyway. Late fees apply, but paying immediately stops additional charges from accumulating. Ask the representative whether the late fee will be waived if you set up automatic payments going forward — some utilities offer this as an incentive.
Other ways to pay your Green Mountain Energy bill
Phone payment is one option, but not the only one. You can pay online through the Green Mountain Energy website or mobile app without waiting on hold. Online payments also post within one business day and let you choose the exact payment date.
You can mail a check to the address on your bill, but mail typically takes five to seven business days to arrive. If you mail a payment, send it at least a week before your due date. You can also set up automatic payments from your bank account, which removes the need to remember to pay each month.
What to do if your payment does not post
If you called and received a confirmation number, the payment will post. Check your account online or on your next bill to confirm. If more than two business days have passed and the payment still does not show, call customer service again with your confirmation number.
If you paid by phone but did not receive a confirmation number, call back immediately. The representative may not have completed the transaction, or there may have been an error. Do not assume the payment went through without that number.
Avoiding common phone payment mistakes
The most common mistake is calling on the due date itself and assuming the payment will post in time. It will not. Call at least one day earlier. Another mistake is paying without writing down the confirmation number — if there is a dispute later, you have no proof you called.
Do not give out more information than the representative asks for. You should never need to provide your full Social Security number, only the last four digits. If a representative asks for your password or full account details unprompted, hang up and call the number on your bill to verify you reached Green Mountain Energy.
Frequently Asked Questions
Can I pay my Green Mountain Energy bill by phone without a bank account?
No. Green Mountain Energy requires either a checking or savings account, or a debit card. Credit cards are not accepted for phone payments. If you do not have a bank account, you can pay online or by mail instead.
Is there a fee to pay my bill by phone?
Green Mountain Energy does not charge a fee for phone payments. The cost is the same whether you pay by phone, online, or by mail.
What time should I call to pay my bill?
Call during Green Mountain Energy's business hours, which are typically Monday through Friday, 8 a.m. to 6 p.m. central time. Call times may vary by season. Check the phone number on your bill for current hours.
Can I set up automatic payments over the phone?
Yes. When you call to pay, ask the representative to set up automatic payments from your bank account. You will need to provide your account number and routing number. Automatic payments remove the need to call each month.
What if I call to pay but the line is busy?
Try calling back in a few minutes, or pay online instead. Online payments are available 24 hours a day and post within one business day, just like phone payments.