Like every major energy provider, Reliant Energy charges late fees to customers who don't make their bill payments on time. Here's some info that may be helpful: It's possible to get a payment extension, and if granted, customers are allowed extra time without having their electricity disconnected. Potential fees include 5% late fees, a disconnection fee (if a disconnection occurs) and a disconnect recovery fee. You'll find details about Reliant energy plans, rates and reviews at HomeEnergyClub.com.