Green energy tariffs were once a premium product for eco-conscious households willing to pay more. In 2026, the landscape has changed significantly — and the choice between green and standard tariffs is no longer as clear-cut as it used to be.
What a Green Tariff Actually Means
A 100% green electricity tariff means your supplier matches your electricity usage with renewable energy certificates (REGOs — Renewable Energy Guarantee of Origin). These certificates are purchased from renewable generators to prove that an equivalent amount of green electricity was put into the grid. Crucially, the electricity coming into your home is the same grid mix as everyone else's — the green element is an accounting mechanism, not a physical connection to a wind farm.
Are Green Tariffs More Expensive in 2026?
Not necessarily. The wholesale cost of renewable electricity has fallen significantly, and several suppliers now offer tariffs that are 100% green-matched at rates at or below the Ofgem cap. Octopus Energy's green tariffs, Good Energy, and Ecotricity are the main players — with Octopus in particular offering competitive rates. The premium for green certification has narrowed to 0-3% above non-green equivalent tariffs for many deals.
How to Switch
- Check your current tariff end date and any exit fees
- Use an Ofgem-accredited comparison site and filter for green tariffs
- Enter your actual annual kWh usage (not Ofgem typical figures) for an accurate cost
- Initiate the switch — your new supplier handles everything, including notifying your old supplier. The process takes 5-10 working days and your supply is never interrupted
Things to Check
Not all green tariffs are equal. Check whether the supplier uses REGOs only, or whether they also directly fund new renewable generation. Suppliers like Good Energy and Ecotricity invest in building new UK renewable capacity — arguably a more meaningful form of green energy. Compare green energy tariffs available today.
