Compare the estimated annual cost using your actual electricity or gas usage, not just the advertised discount or supply charge. Check usage rates, daily supply charges, conditional discounts, contract terms, exit fees, renewable options and whether rates can change. If you have solar, look closely at the feed-in tariff and how it affects your overall bill, rather than choosing the highest advertised credit alone. Use the Australian Government’s Energy Made Easy website, or Victorian Energy Compare if you live in Victoria, then confirm the final offer and terms with the retailer.