NDPL customers can easily pay bills from its official website www.ndpl.com . To pay bill you will be required to enter your Contract Account No (CA NO.) Some important points : You can pay your bills using your valid Credit card/Debit card/Cash card. Limit on payment through Credit Card / Debit Card – Rs.10,000/- for a Kno during one billing cycle. Please note that you must make the payment through Credit/Debit card at least three days before the due date to avoid the late payment surcharge. Online Bill Payment facility is available at below link : http://www.ndpl.com/Display-Content.aspx?RefTypes=1&RefIds=521&page=Bill%20Payment