PLC is the project topic on automated billing system for electricity. As the data will be sended directly through the 230 v power line , for that we have to place a power line modem in consumer's house as well as electricity board. so that each consumer will have diff consumer code to differentiate each house. so the monthly unit will be noted and sent to board, corresponding bill will be displayed. the person sitting in the office can control the electricity to each house.so while at the case of not paying the bill, they can cut the fuse and also remake it. It can also cut the fuse automatically at the case of overload, certain value have to be set as limit for each case. each consumer in same area can be recognized by his consumer code . suppose if we have transformers in between , again we have to place power line modem before and after transformers to overcome the problem .