What is a REGO certificate for renewable electricity?

A REGO is an Ofgem-administered certificate recording eligible renewable electricity generation. Ofgem issues one certificate per megawatt-hour, or MWh, of eligible output [S1]. It supports disclosure of electricity sources. For your business's market-based Scope 2 reporting, the associated evidence must meet the applicable accounting quality criteria; a green label alone does not establish that [S2]. Checked October 2026.

Last checked 19 October 2026

What does a REGO certificate mean for your site?

A REGO is a certificate administered by Ofgem that records eligible renewable electricity generation [S1]. Why it matters for your site: it helps document a renewable electricity claim, but the claim still needs a clear accounting basis.

Ofgem issues one REGO for each megawatt-hour (MWh) of eligible renewable output. The scheme’s main use is Fuel Mix Disclosure, through which licensed suppliers disclose the fuels used to generate their electricity [S1].

Does a green tariff identify the electricity reaching your building?

A certificate records generation attributes. It does not trace particular electricity through the shared grid to your premises. GHG Protocol distinguishes attribute tracking from physical energy delivery [S2]. Ask which certificates support your purchased electricity and which consumption period they cover.

For example, assume your site purchases 20 MWh in a reporting period. Matching that quantity would require evidence covering 20 MWh: 20 × one certificate per MWh = 20 REGOs [S1]. This is quantity arithmetic, not confirmation that the evidence meets your reporting requirements or that a project has created extra renewable generation.

How do REGOs relate to market-based Scope 2 reporting?

Scope 2 covers emissions associated with purchased energy. The market-based method uses qualifying contractual information; the location-based method reflects generation where consumption occurs. GHG Protocol sets quality criteria for instruments and addresses double counting, cancellation and generation-period matching [S2].

Request the evidence behind the claim and the emission factor used. Its reporting FAQ also requires disclosure of the instrument categories and confirmation that quality criteria are met [S3]. Ask your reporting adviser to review the record before publishing a carbon statement.

Use carbon reporting and Scope 2 and the emissions scopes glossary for the wider accounting framework. Keep energy-cost analysis separate, using business electricity data.

Next step

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