Key terms and issues explained

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On this page you will find a range of key terms explained for business energy. Please click on a letter below to be taken to a list of terms and on "show" to read the explanation.


An additional and exceptional charge added to the usual energy charge(s). This often happens where a supplier requires a customer to pay a fee for leaving a contract before the contract end date.


The process of changing gas or electricity supplier, or changing to a new tariff with the same supplier.

Switching costs

The costs incurred by customers in finding and switching supplier. Switching costs are classified into a variety of categories, including: transaction costs, contractual costs, uncertainty costs, psychological costs, shopping costs and search costs. In addition to the above, firms can also incur costs when customers switch supplier.

Switching site

An online comparison and switching service that helps consumers to compare prices on a range of products and services.

Switching window

The period in which a consumer is eligible to switch supplier, in response to an End of Contract Notification, in which they will not be subject to any Termination Fees or be required to notify their supplier of their intention to switch.