Offtaker of Last Resort levelisation process schedule 2026 to 2027

Publication type:
Guidance
Publication date:
Scheme name:
OLR

Below are the dates and deadlines for the Offtaker of Last Resort (OLR) supplier levelisation process for the year 1 April 2026 to 31 March 2027. 

The levelisation process will only run if a Backstop Power Purchase Agreement (BPPA) is in effect in the OLR year 1 April 2025 - 31 March 2026. If the OLR process is activated, we will carry out levelisation periodically and annually. 

The periodic levelisation schedule for the OLR year 1 April 2026 - 31 March 2027 includes the key dates and deadlines for the levelisation process.

Periodic levelisation timetable

Quarterly Period Deadline for submission of BPPA generation data to Ofgem Date on which Ofgem will send out invoices/ credit  notices to all relevant suppliers Deadline for submitting payments into the levelisation account Date on which Ofgem will make relevant payments from the levelisation account
1 April - 30 June 2026 10 July 2026 28 July 2026 11 August 2026 21 August 2026
1 July - 30 September 2026 16 October 2026 30 October 2026 13 November 2026 27 November 2026
1 October - 31 December 2026 15 January 2027 29 January 2027 12 February 2027 23 February 2027
1 January - 31 March 2027 16 April 2027 30 April 2027 14 May 2027 28 May 2027

The schedule for the annual levelisation process includes the key dates and deadlines for the yearly reconciliation process for 1 April 2026 - 31 March 2027.

Annual levelisation timetable

OLR Year Deadline for submission of BPPA generation data to Ofgem Date on which Ofgem will send out invoices/ credit  notices to all relevant suppliers Deadline for submitting payments into the levelisation account Date on which Ofgem will make relevant payments from the levelisation account
1 April 2026 - 31 March 2027 03 August 2027 07 September 2027 20 September 2027 30 September 2027

Further information on what is required as part of the levelisation process is available on the OLR Essential Guide for Suppliers.

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Offtaker of Last Resort