Operational Costs Levy

This dataset includes the actual, forecast, and excess CfD Operational Costs and demand volumes for the current and historic operational periods.

An electricity supplier must make a payment (“an operational cost payment”) to the CfD counterparty for each day that supplier makes an electricity supply during an operational cost period. The amount of an operational cost payment to be paid by a supplier for a day is equal to the amount of electricity supplied by that supplier on that day multiplied by the operational levy rate.

Any amounts received by the CfD counterparty greater than the costs it incurred in respect of the relevant period must be paid back to electricity suppliers.

This dataset is updated following the end of each financial year.

Data and Resources

Additional Info

Field Value
Last Updated December 8, 2025, 07:14 (UTC)
Created December 8, 2025, 07:13 (UTC)
Actual Demand (TWh)

The actual Demand for a relevant period
Actual OCL Paid (£m)

The actual Operational Costs Paid by Suppliers received by the CfD counterparty
Actual Operational Costs (£m)

The actual Operational Costs for a relevant period calculated once a period has completed
Effective OCL Rate (£/MWh)

The effective Operational Costs Levy rate is the OCL rate less the refund rate for a relevant period
Excess Operational Costs (£m)

Excess Operational Costs for a relevant period
Forecast Demand (TWh)

The forecasted demand for a relevant period
Forecast Operational Costs (£m)

The forecasted operational costs for a relevant period
OCL Rate (£/MWh)

Operational Costs Levy rate for a relevant period
Period End

CfD period end date
Period Start

CfD period start date
Refund Rate (£/MWh)

Refund Rate for a relevant period