We have 1 billing cycle for all customers. Gas bills are due on the 10th of each month. A 10% penalty will be added to all accounts not paid in full on the 11th. To avoid penalty when mailing your bill, your payment must be postmarked no later than the 9th. If you are using a bill pay service, please allow 5 to 7 working days for us to receive your payment. Failure to receive bill DOES NOT relieve customer of payment and penalty.