Billing & Payment Info

How to Pay Your Bill

We offer several convenient ways to pay your bill. Pay online, by mail, by phone or in person. You can even set it up to be paid automatically each month! Choose the one that works best for you.

Pay Online

Visit  Be sure to have your 16-digit account number handy. Note: Our payment partner, Paymentus, charges $1.95 per transaction for e-check, credit card and debit card payments.  Want to avoid the transaction fee? There is no charge to pay by e-check through My Account. Not registered? Visit

Automatic Payment

Save time and money and sign up for Auto Pay. Your bill will be paid on time, every time, directly from your checking or savings account on the date it is due. No stamps are required. You’ll still receive a copy of your bill before the due date, so you will have time to ask any questions before payment. Best of all, it’s totally free! To enroll in the program, log on to My Account or contact our customer service center.

Go Paperless!

Save Time. Save Money. Sign up for your paperless billing and payment programs on the My Account page.  Not registered? Click here and be sure to have your account number handy.

Paperless Billing 11-20162

Pay by Mail

Use the envelope provided with your bill, and send your payment along with the payment stub. No cash, staples or paper clips please. Mail to: Hawaii American Water, P.O. Box 7150, Pasadena, CA 91109-7150

Pay by Phone

If you do not have questions about your bill, you can pay by phone using your Visa or MasterCard by calling 1-855-748-6066. Be sure to have your account number handy. Please note that our payment vendor, Paymentus, charges $1.95 per transaction.

Want to avoid the transaction fee? There is no charge to pay by e-check through My Account. Not registered? Visit

Pay In Person at Local Payment Location

For our customers who prefer to pay in person, stop by our local office located at 6700 Kalanianaole Highway, Suite #206 in Honolulu. Our office is open Monday through Friday, 9:00 a.m. to 4:00 p.m.