| Issuer and registry | Ofgem |
| Unit | 1 certificate = 1 MWh |
| Valid for | UK consumption. RE100 treats the UK as its own market, separate from the EU |
| Periods | Grouped by compliance period, which runs April to March |
| Public data | Accredited stations and certificate statistics, published under the Open Government Licence |
How buying works
REGOs are used by suppliers for fuel mix disclosure and by companies for market-based Scope 2 claims. They are bought through suppliers, traders and auctions, and redeemed against UK consumption for the relevant period.
Market conditions
After a sharp rise in 2022 and 2023, REGO prices fell as supply caught up with demand, and analysts describe the market as oversupplied. Prices differ by technology, with biomass and non-biomass increasingly treated separately.
What to check before buying
- UK consumption only. An EU Guarantee of Origin does not cover a UK site, and a REGO does not cover an EU site.
- Compliance period matching your reporting year.
- Technology, especially if your policy excludes biomass.