The last day to pay is the 25th of the month before 5:00pm. If the 25th of the month falls on a weekend, payment will be due the following business day by 5:00 pm to avoid disconnection.
Please keep in mind that the 10% penalty is applied after the 15th of the month. In order to avoid any additional charges to your account, payment is due the 15th by 5:00 pm.