Start by checking your recent bill for your usage, supply address, tariff type and current rates. Compare plans on the usage rates, daily supply charge, discounts, contract terms, exit fees and any solar feed-in tariff—not just the advertised discount. Government comparison sites such as Energy Made Easy in most states and Victorian Energy Compare can show estimated costs based on your circumstances, while your retailer can explain plan details. Your actual bill will depend on your household’s usage, so treat estimates as a guide and check the contract before switching.