Pass-through costs are fees paid to other companies who operate and maintain the electricity network. For domestic customers these are all combined into a single standing charge.

These charges are approved each year by the Utility Regulator and are charged by all energy suppliers – but the amounts may vary.

Types of Electricity Pass-through Costs

There are two types of pass-through costs for domestic electricity customers:

Distribution charges

Also referred to as Distribution Use of System (DUoS), this covers the cost of transporting electricity through the network directly to your home and is charged by NIE Networks.

Transmission charges

Also known as Transmission Use of System charges (TUoS), these charges cover the cost of transporting electricity from the generating station to the network and are charged by the Systems Operators Northern Ireland (SONI).