Start by checking the billing period, your meter readings and whether the supplier used actual or estimated readings. Next, review the unit rate, standing charge, VAT and any balance carried forward, then compare the total with your payments and previous bills. Send regular meter readings and contact your supplier promptly if anything looks wrong or you are struggling to pay; they may offer support or an affordable repayment plan. Check GOV.UK for current help with energy costs and consider comparing tariffs, while remembering that savings depend on your usage, property and available deals.