The due date for NIPSCO bills generally falls within a few weeks after the billing date, typically around twenty-one days after the bill is issued. Each customer's bill will have a specific due date stated on it, and it is important for customers to review their individual statements to find this information. NIPSCO aims to provide customers with enough time to review their usage and make the necessary payments. If a customer is unsure about their specific due date, they can refer to the billing section on the NIPSCO website, where useful resources and information can be found. Always keep an eye on the due date to avoid any late fees or service interruptions. Payment methods and assistance options are also available on the NIPSCO site for customer convenience.