Renewables Obligation Certificate (ROC) issue schedule 2025 to 2026

Renewables Obligation (RO)

The deadlines for data submission for the purpose of issuing Renewables Obligation Certificates (ROCs) and the dates by which Ofgem intends to issue ROCs for the period April 2025 to March 2026.

Month and year of generation

A: Date by which ROC output data must be received

B: Date by which Ofgem intends to issue ROCs

April 2025

30 June 2025

21 July 2025

May 2025

31 July 2025

21 August 2025

June 2025

31 August 2025

22 September 2025

July 2025

30 September 2025

15 October 2025

August 2025

31 October 2025

17 November 2025

September 2025

30 November 2025

15 December 2025

October 2025

31 December 2025

15 January 2026

November 2025

31 January 2026

16 February 2026

December 2025

28 February 2026

16 March 2026

January 2026

31 March 2026

15 April 2026

February 2026

30 April 2026

15 May 2026

March 2026

31 May 2026

15 June 2026

If an operator has problems submitting ROC output data to Ofgem within the timeframes, we should be notified before the relevant date in Column A. If data for Renewables Obligation Certificates (ROCs) is submitted to Ofgem after the date shown in Column A it will be suspended and Ofgem will look to generators to provide reasons as to why the data was submitted late. In these cases, it is unlikely that ROCs will be issued by the date shown in column B.

Micro-generating stations

Operators of micro-generating stations with a declared net capacity of 50 kW or less (or their agents) that have notified Ofgem that they want ROCs to be issued on an annual basis, must provide data for output and input electricity for the period 1 April 2025 to 31 March 2026 by 31 May 2026 at the latest. Our generator guidance and agent guidance provides more information on this.

For individual micro-generating stations in Northern Ireland we provide detailed instructions in the register user guide. In the majority of cases, data should be submitted via the register.

Contact us

In the event of a problem with the register, email us at renewable.outputdata@ofgem.gov.uk. If you need to speak to a member of the Renewables team directly, please call our helpline on 020 7901 7310.