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National Grid incurs a cost for the day to day operation of the transmission system; this cost is recovered via the BSUoS (Balancing Services Use of System) charge. Generators and suppliers are liable for these charges, which are calculated daily as a flat tariff.
National Grid is obligated under the terms of our transmission licence to provide a forecast of BSUoS charges for the incentive scheme period. BSUoS charges are dependent on the balancing actions we take each day, so we provide an updated BSUoS forecast every month.
The latest forecast can currently be found in the MBSS (Monthly Balancing Services Summary)Historical charges can also be found here.