Iresa Limited typically sends out bills on a monthly basis. Customers can expect to receive their billing statements at the beginning of each month, detailing their usage and any charges incurred during the previous billing cycle. This monthly billing cycle helps customers to stay informed about their energy consumption and manage their payments effectively. Additionally, Iresa may provide options for customers to access their bills online, which can make it easier to keep track of expenses. For the most accurate and up-to-date information on billing frequency or payment options, it is advisable to visit the official Iresa website. There, customers can find specific details relevant to their accounts and services.