An energy retailer is the company that sells electricity or gas to you, sends your bills and manages your plan; the distributor generally maintains the poles, wires and pipes in your area. When comparing retailers, check the estimated annual cost, usage and supply charges, solar feed-in rates, contract conditions, discounts and exit fees—not just the headline offer. Use the government-backed Energy Made Easy comparison service to review available plans using your postcode and usage details. Your final costs depend on your household’s consumption and the plan terms, so contact the retailer directly if anything is unclear.