Compare estimated annual costs using your actual usage, not just the advertised cents-per-kilowatt-hour rate. Check the daily supply charge, tariff type, discounts and whether they depend on paying on time, direct debit or other conditions. Also look for contract terms, exit fees, price-review rights, solar feed-in rates and any concessions you may receive. Energy plans and offers vary by state or territory, so use the Australian Government’s Energy Made Easy website where available, then confirm the details with the retailer before switching.