The cost of electricity in the UK is determined by Ofgem's Energy Price Cap, which is reviewed every three months. As of the final quarter of 2024 (October–December), the average unit rate for households on a standard variable tariff paying by direct debit is 24.5 pence per kilowatt hour [1], with one source citing 24.67p/kWh [2]. These figures represent national averages; actual rates vary slightly by region and payment method. In addition to the unit rate, customers pay a daily standing charge of approximately 60.99 pence [1] or 57.21 pence [2] to cover grid maintenance and supply infrastructure costs.

These price-cap rates apply only to standard variable tariffs. Customers on fixed-term contracts pay rates locked in at the time they signed, while those using prepayment meters or paying on receipt of a bill typically face slightly higher charges than direct-debit payers. To estimate your bill, multiply your usage in kWh by the unit rate and add the daily standing charge multiplied by the number of days in your billing period. For example, 100 kWh at 24.5p/kWh costs £24.50 plus standing charges.

Since the Energy Price Cap does not limit total bills—only the per-unit price—your actual cost depends entirely on your consumption. For the most accurate rate applicable to your specific situation, check your latest energy statement or contact your supplier directly. Some sources calculate an "all-inclusive" cost per kWh by spreading standing charges across typical usage, which may reach around 28p/kWh, but this differs from the unit rate shown on your bill.