A high electricity bill can occur due to several causes. Among the causes that can result in a high electricity bill are as follows:

• Addition of new electrical appliances at home
• Use of electrical appliances over an extended period
• Billing reading period exceeding 31 days
• Estimated electricity bill adjusted after the actual meter reading is obtained
• Faulty electricity meter (meter accuracy error percentage exceeding 3%)

For confirmation, consumers may contact the licensee to check the cause of the increase in the electricity bill. If the high electricity bill is due to a faulty electricity meter, the licensee is required to replace the consumer's meter and re-adjust the consumer's electricity bill.