What GMP Bill Pay is and how to use it
Green Mountain Power (GMP) Bill Pay is the online payment system that lets you pay your electric bill through GMP's website or mobile app without writing a check or calling a phone number. You can set up a one-time payment, schedule recurring payments for the same day each month, or pay immediately if your bill is due soon.
The system accepts payments from a bank account (ACH transfer) or debit card. There is no fee to pay by bank account. Debit card payments carry a fee that GMP shows you before you confirm the transaction — typically a few dollars depending on the payment amount. You do not need to create a separate account; if you have a GMP customer number, you can log in with your existing online account credentials.
GMP Bill Pay works 24 hours a day, seven days a week. Payments made before 8 p.m. Eastern Time on a business day usually post to your account the next business day. Weekend and holiday payments process on the next business day after that.
Key Takeaways
- Bank account payments through GMP Bill Pay have no fee, while debit card payments charge a small fee shown before you confirm.
- You can pay once, set up a monthly recurring payment, or schedule a payment for a specific future date through the same online portal.
- Payments made before 8 p.m. Eastern Time on a business day post the next business day; weekend payments post the following business day.
- If you do not have internet access, you can pay by phone, mail, or automatic bank draft without using the online system.
How to set up a one-time payment
Log into your GMP online account at greenmountainpower.com using your customer number and password. If you do not have an online account yet, you can create one on the same page by entering your account number and zip code.
Once logged in, look for the "Pay My Bill" or "Make a Payment" button — the exact label varies slightly depending on whether you are on the website or app. Select the payment method (bank account or debit card), enter the amount you want to pay, and choose the date you want the payment to go through. Review the details, including any fee, and confirm.
You will see a confirmation number on screen and receive an email receipt. Keep the confirmation number in case you need to check on the payment status later. The payment will not appear on your bill immediately; GMP updates your account balance once the payment posts, which usually takes one business day.
Setting up automatic monthly payments
Automatic payments (sometimes called autopay or recurring payments) deduct money from your bank account on the same day each month. This is useful if you want to stop thinking about your bill and avoid late fees. You set it up through the same GMP online account.
Go to "Pay My Bill," select "Set Up Automatic Payments" or "Recurring Payment," and choose your bank account as the payment method. Enter the amount — you can pay the full bill amount, a fixed dollar amount each month, or a percentage of the bill. Pick the day of the month you want the payment to happen (for example, the 15th). GMP will deduct that amount automatically every month until you cancel.
If your bill amount changes month to month (which is normal for electric bills), you have two options: pay a fixed dollar amount each month and adjust it when your usage changes, or pay the full bill amount and let GMP deduct whatever your current bill is. The second option means you do not have to remember to update the amount, but your payment will vary.
Paying by phone, mail, or automatic bank draft
If you do not use the online system, you can pay by phone by calling GMP's customer service line at 1-888-835-4672. A representative can process a one-time payment from your bank account or debit card. Phone payments are available during business hours, and the same fees apply: no fee for bank account, a fee for debit card.
To pay by mail, send a check or money order to the address printed on your bill. Include your account number on the check. Mail payments take longer to post — typically five to ten business days depending on mail delivery — so send it early if your due date is approaching.
Automatic bank draft (also called direct debit) is different from online autopay. With bank draft, GMP pulls money directly from your checking account on a set day each month, and you authorize it through your bank rather than through GMP's website. Ask GMP customer service if you want to set this up; it is available but less commonly used than online autopay.
What to do if a payment fails or does not post
If a payment fails, GMP will send you a notice explaining why — usually because the bank account or debit card information was incorrect or the account had insufficient funds. Log back into your account, check the payment status, and try again with corrected information.
If you made a payment and it has been more than two business days and the amount still does not show on your bill, log into your account and look for a "Payment History" or "Recent Transactions" section. This will show you whether the payment posted and when. If the payment shows as pending, wait one more business day. If it shows as failed, contact GMP customer service at 1-888-835-4672 to ask why and to resubmit.
Do not make a second payment right away if the first one fails — wait for GMP to confirm the failure, or you may end up paying twice. If you are unsure, call customer service and ask them to check the status before you pay again.
Late payments and what happens if you miss the due date
Your bill has a due date printed on it. If payment is not received by that date, GMP may charge a late fee (the amount varies and is shown on your bill). If you miss the due date, pay as soon as you can to avoid additional fees and to prevent your service from being interrupted.
GMP does not immediately shut off service for a single late payment. However, if your account falls significantly behind — usually 60 days or more — GMP will send a disconnection notice. You then have a window of time (usually 10 to 14 days) to pay or contact GMP to discuss a payment plan before service is shut off.
If you are having trouble paying your bill, contact GMP before the due date. They offer payment plans and may have programs to help customers with financial hardship. Calling ahead is much better than waiting for a disconnection notice.
Frequently Asked Questions
Is there a fee to pay my GMP bill online?
No fee if you pay from a bank account. Debit card payments have a fee that GMP shows you before you confirm the payment — usually a few dollars depending on the amount. Bank account payments are the cheapest option.
Can I change or cancel a payment after I schedule it?
Yes, but only before it posts. Log into your account, find the scheduled payment in your payment history, and look for a "Cancel" or "Edit" option. Once the payment has posted (usually the next business day), you cannot cancel it, but you can contact GMP customer service to discuss a refund or credit.
What if I pay too much by accident?
GMP will credit the overpayment to your account and apply it to your next bill. If you want a refund instead, contact customer service at 1-888-835-4672 and ask them to process one. Refunds typically take one to two weeks.
Do I have to use GMP Bill Pay, or can I pay another way?
You do not have to use it. You can pay by phone, mail, automatic bank draft, or in person at a GMP office. Bill Pay is just the fastest and most convenient option if you have internet access.
What if my internet is down or I cannot access the website?
Call GMP customer service at 1-888-835-4672 to pay by phone, or mail a check to the address on your bill. Both options work anytime, and there is no fee for either method.