Renewables obligation level calculations: 2027 to 2028

The Renewables Obligation scheme places an annual obligation on UK electricity suppliers to present to Ofgem (the scheme’s administrator) a specified number of Renewables Obligation Certificates (ROCs) per megawatt hour of electricity supplied to their customers during each obligation period.

The Secretary of State is required to publish the level of the obligation (in ROCs per megawatt hour) 6 months before the start of each obligation period (which runs from April to March).

This note sets out the level of the obligation for the 2027 to 2028 period and explains the underpinning methodology. It also gives an indication of what the level of the obligation for Great Britain may be once the exemption for certain manufacturing businesses is implemented under the British Industrial Competitiveness Scheme.