An electricity bill usually includes your usage charges, daily supply charge, applicable taxes or fees, and any discounts, concessions or solar feed-in credits. Check the billing period, meter readings and whether the reading is actual or estimated, then compare your usage with earlier bills to spot unusual changes. Your rates may vary by time of use, tariff, retailer or contract, so review the plan details and any upcoming price changes. If something looks wrong, contact your retailer first; you can also compare plans through Energy Made Easy.