The fastest way to pay Avista is online through their website or mobile app, by phone, or by mail — and each method has different timing and fees

Avista Utilities serves customers in Washington, Oregon, and Idaho with electricity and natural gas. When your bill arrives, you have several ways to send payment, and the method you choose affects how quickly Avista records it and whether you pay a fee. Online payment through Avista's website or app is free and usually posts within one business day. Phone payments and in-person payments at authorized locations are also available but may carry fees. Mail takes longer — typically 7 to 10 business days — so use it only if you have time before your due date.

The due date on your bill is when Avista must receive the payment, not when you send it. This distinction matters most for mailed checks and phone payments, which take time to process. If you are cutting it close to your due date, online payment is your safest option because it posts fastest and you get an immediate confirmation.

Key Takeaways

  • Avista's website and mobile app offer free online bill payment that posts within one business day, with no transaction fees for debit cards, credit cards, or bank accounts.
  • You can pay by phone at 1-800-227-9187, but Avista charges a fee for this convenience method that varies by payment type.
  • Mailed checks take 7 to 10 business days to reach Avista and post to your account, so send them well before your due date to avoid late fees.
  • Setting up automatic payments through Avista's website prevents missed due dates and late fees, and the service is free.
  • If you cannot pay in full, contact Avista before your due date to discuss payment plans or assistance programs rather than waiting until after the deadline.

Paying online through Avista's website or app

Log in to your Avista account at avistautilities.com using your account number and password. If you do not have an online account, click "Register" and enter your account number, service address, and email. Once logged in, select "Pay My Bill" or a similar option in the menu. You will be asked to choose a payment method — debit card, credit card, or bank account. Avista does not charge a fee for any of these options when you pay through their website.

Enter the amount you want to pay. You can pay less than the full balance if needed, though paying the full amount by the due date prevents late fees. Confirm the payment and you will receive a confirmation number immediately. The payment usually posts within one business day, though Avista recommends allowing up to two business days before assuming there is a problem.

Avista's mobile app works the same way. Download it from the Apple App Store or Google Play, log in with your account credentials, and select the payment option. Mobile payments are also free and post on the same timeline as website payments. Many customers find the app faster than logging into a computer, especially if you pay on the go.

Paying by phone or setting up automatic payments

Call Avista's payment line at 1-800-227-9187 to pay by phone. Have your account number and payment method ready. Avista charges a fee for phone payments — the amount varies depending on whether you use a debit card, credit card, or bank account, so ask before you confirm the payment. This fee is separate from your bill and will appear on your next statement. Phone payments typically post within one to two business days.

To avoid phone fees and the risk of missing a due date, set up automatic payments instead. Log into your Avista account online, go to "Autopay" or "Automatic Payments," and link your bank account or card. Choose the date you want the payment to come out each month — Avista recommends a few days before your due date. Automatic payments are free and remove the need to remember to pay each month. You can change or cancel automatic payments anytime through your account.

If you use your bank's bill pay feature instead of Avista's autopay, the payment still reaches Avista but timing depends on your bank. Most banks send payments within 1 to 3 business days, so plan accordingly and submit early if your due date is soon. Avista's autopay is usually faster and more reliable because it comes directly from Avista's system.

Paying by mail or at authorized locations

If you prefer to mail a check, write your account number on the check and mail it to the address shown on your bill. Avista's mailing address varies by state, so always use the address printed on your statement — do not use a general company address. Mail typically takes 7 to 10 business days to arrive and be processed, so send it at least two weeks before your due date to avoid a late fee. Keep a copy of the check or take a photo of the front and back for your records.

Some Avista customers can pay in person at authorized payment locations, though this option is limited and varies by region. Check Avista's website or call 1-800-227-9187 to learn about there is a location near you. In-person payments usually post the same day or next business day, making them faster than mail but less convenient than online payment. You will receive a receipt at the time of payment.

Understanding your due date and late fees

Your bill shows a due date, usually 20 to 25 days after the bill date. Avista considers a payment late if it is not received by that date. If you pay online or by phone, the payment counts as received on the day Avista processes it, not the day you submit it — so submit online payments at least one business day before the due date to be safe. If you mail a check, Avista counts the payment as received when it arrives at their office, not when you drop it in the mail.

If your payment arrives after the due date, Avista charges a late fee. The amount depends on your bill size and state regulations. Late fees also trigger a notice on your account and can affect your credit report if the account goes to collections. If you know you will miss a due date, contact Avista before it passes to discuss a payment plan or extension. Many customers do not realize that calling before the deadline can prevent a late fee entirely.

What to do if you cannot pay your full bill

If you cannot pay the full amount by the due date, contact Avista immediately at 1-800-227-9187. Do not wait until after the due date passes. Avista offers payment plans that let you spread the balance over several months, and they may not charge a late fee if you set up the plan before the due date. A payment plan is a formal agreement, so get the terms in writing and confirm the new payment dates.

Avista also administers assistance programs for customers with low income or hardship. These programs may help cover part or all of your bill. Ask Avista about programs like the Low Income Home Energy Assistance Program (LIHEAP) or Avista's own assistance fund. may be able to access and benefit amounts vary by state and income level. If you are struggling to pay, mentioning hardship when you call can open doors to resources you might not know about otherwise.

If your account has already been disconnected for non-payment, you will need to pay the full past-due balance plus a reconnection fee to restore service. Reconnection typically happens within one business day of payment, though emergency reconnections may be available in some cases. Disconnection is expensive and disruptive, so reaching out before that point is always the better choice.

Keeping track of your payment and account status

After you pay, log back into your Avista account within one or two business days to confirm the payment posted. Your account should show the payment amount, the date it was received, and your new balance. If a payment does not appear within the expected timeframe, contact Avista to verify it was processed. A missing payment is rare, but checking gives you peace of mind and time to follow up if something went wrong.

Save your payment confirmation number or receipt, especially for online or phone payments. If a dispute arises about whether Avista received your payment, the confirmation number proves you sent it and when. For mailed checks, keep a copy of the check or a photo of the front and back. These records protect you if Avista's system shows a different amount or date than what you sent.

Set a reminder on your phone or calendar for a few days before your due date so you do not forget to pay. If you travel, work irregular hours, or simply want one less thing to think about, automatic payments remove this burden entirely and ensure your account stays current.

Frequently Asked Questions

Does Avista charge a fee for online payments?

No. Avista does not charge a fee for payments made through their website or mobile app, regardless of whether you use a debit card, credit card, or bank account. Phone payments and some other methods may have fees, but online is always free.

How long does it take for a mailed check to post?

Mail typically takes 7 to 10 business days to reach Avista and be processed. Send your check at least two weeks before the due date to avoid a late fee. The due date on your bill is when Avista must receive the payment, not when you mail it.

Can I set up automatic payments so I never miss a due date?

Yes. Log into your Avista account online and look for "Autopay" or "Automatic Payments." Link your bank account or card and choose the date you want the payment to come out each month. Automatic payments are free and post on schedule.

What happens if I pay late?

Avista charges a late fee if your payment is not received by the due date. The fee amount depends on your bill size and state. Late fees can also trigger a notice on your account and affect your credit if the account goes unpaid for several months. Contact Avista before the due date if you cannot pay in full.

Can Avista help me if I cannot afford my bill?

Yes. Call Avista at 1-800-227-9187 to ask about payment plans, which spread your balance over several months. Avista also administers assistance programs for customers with low income or hardship. Programs and benefit amounts vary by state and income level.