The fastest way to pay CMP is online through their website or mobile app, by phone, or by mail — each method takes a few minutes and shows your payment right away.

Central Maine Power (CMP) gives you several ways to settle your bill, and the method you choose depends on what works for your schedule and how you like to handle money. Online payment through CMP's website or their mobile app is the quickest route — you can pay any time of day, see your balance update instantly, and keep a record right there. If you prefer talking to a person, you can call CMP's payment line. If you want to mail a check, that works too, though it takes longer to process.

The key thing to know is that CMP does not charge a fee for paying online, by phone, or by mail. Some utilities charge extra for certain payment methods, but CMP does not. That means you can pick whichever way is easiest for you without worrying about hidden costs.

Key Takeaways

  • You can pay online through CMP's website or mobile app without any fee, and your payment shows up immediately.
  • Phone payment is available by calling CMP's customer service line, and you can pay with a debit card, credit card, or bank account.
  • Mailing a check to CMP takes 7 to 10 business days to process, so send it early if your due date is coming up.
  • Setting up automatic payments through your bank or CMP's website means you never have to remember to pay again.
  • Your bill shows a due date — paying after that date may result in a late fee, so mark it on your calendar.

Paying online through CMP's website or app

Go to CMP's website (cmpco.com) and look for the "Pay My Bill" or "Make a Payment" button, usually near the top of the page. You will need your account number, which appears on your bill, and either a debit card, credit card, or bank account information. The website will walk you through the payment step by step and show you a confirmation number when it is done.

CMP also has a mobile app you can download on iPhone or Android. The app works the same way as the website — log in with your account number and password, enter your payment amount, and choose your payment method. Many people find the app easier because it is always on their phone and you can pay in seconds.

One important detail: online payments usually go through the same day you make them, but CMP may take one business day to post the payment to your account. That means if you pay on a Friday evening, it might not show as paid until Monday. If your due date is the next day, pay a day or two early to be safe.

Paying by phone

Call CMP's customer service line at 1-800-696-1000. A representative will ask for your account number and the amount you want to pay, then walk you through entering your payment information over the phone. You can pay with a debit card, credit card, or by giving your bank account details.

Phone payments are processed the same day you call, and you will get a confirmation number to write down. This method is useful if you have questions about your bill or your account while you are paying, because you can ask the representative right then.

Paying by mail

Write a check or money order, include your account number on the check, and mail it to the address shown on your bill. CMP's mailing address is usually printed at the bottom of your statement. Put the check in an envelope and send it to that address.

Mail takes 7 to 10 business days to reach CMP and be processed. If your due date is coming up, do not wait — mail your payment at least two weeks before the due date to make sure it arrives on time. If you mail it too close to the due date and it arrives late, CMP may charge a late fee even though you sent it early.

Setting up automatic payments so you never miss a due date

The easiest way to never worry about paying your CMP bill is to set up automatic payments. You can do this through CMP's website by logging into your account, going to the payment or billing section, and selecting "Automatic Payments" or "Recurring Payments." You choose the amount and the date each month, and CMP pulls the money from your bank account or card automatically.

You can also set up automatic payments through your own bank. Log into your bank's website, go to the bill pay section, and add CMP as a payee. Then schedule a payment for the due date each month. Your bank will mail a check to CMP on your behalf, so this method takes a few days longer than CMP's own automatic system, but it works just as well.

With automatic payments, you do not have to remember the due date or take time to pay each month. If your bill amount changes (which it usually does with heating or cooling seasons), you can adjust the automatic payment amount anytime through your account.

What happens if you pay late

CMP's bills show a due date, usually 20 to 25 days after the bill is mailed. If you pay after that date, CMP charges a late fee. The amount of the late fee depends on your bill total, but it is usually a percentage of what you owe — check your bill or CMP's website for the exact amount.

If you are having trouble paying your bill on time, contact CMP before the due date. They have programs that may help, such as budget billing (which spreads your costs evenly across the year) or hardship programs for people facing financial difficulty. Calling ahead is better than paying late, because it keeps the late fee off your account.

Understanding your bill before you pay

Before you pay, take a minute to read your bill and make sure the amount makes sense. Your CMP bill shows your usage in kilowatt-hours (kWh), the rate you are charged per kWh, and the total amount due. If the amount seems much higher than usual, check whether the weather was extreme that month (heating in winter or air conditioning in summer uses more power) or whether you had any changes in how you use electricity.

Your bill also shows a breakdown of charges: the supply charge (the actual electricity you used), delivery charges (the cost to get it to your home), and any taxes or fees. If you see a charge you do not recognize, call CMP before you pay and ask about it. They can explain what each line means.

Frequently Asked Questions

Can I pay my CMP bill with a credit card online?

Yes, CMP accepts credit cards, debit cards, and bank account payments on their website and mobile app. There is no fee for any of these payment methods. You can also pay by credit card over the phone by calling 1-800-696-1000.

What if I pay my bill but it still shows as unpaid on my account?

Online and phone payments usually post within one business day. If you paid more than a day ago and it still shows unpaid, log into your account or call CMP to check the status. Have your confirmation number ready. If the payment went through, it should appear within 24 hours.

Is there a way to pay my CMP bill without going online?

Yes. You can pay by phone at 1-800-696-1000, by mailing a check to the address on your bill, or by setting up automatic payments through your bank. All three methods work without using CMP's website or app.

What is the due date on my CMP bill?

The due date is printed on your bill, usually near the top or bottom. It is typically 20 to 25 days after the bill is mailed. If you pay after this date, a late fee applies. You can also log into your CMP account online to see your due date anytime.

Can I change my automatic payment amount or date?

Yes. Log into your CMP account on their website, go to the automatic payments section, and update the amount or date. Changes usually take effect on your next scheduled payment. If you set up automatic payments through your bank instead, log into your bank account to make changes there.