Green energy tariffs comparison (July 2026)
Go 100% renewable without paying more. Compare the best green electricity deals for July 2026 — many now sit below the £1,862 price cap.
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Green energy is no longer a premium. For July 2026 the best 100% renewable electricity tariffs — from suppliers such as Octopus, Good Energy, Ecotricity, So Energy and E.ON Next — are priced at or below the new £1,862 price cap. The cap rises 13.5% on 1 July, but a fixed green deal locks your rate, so switching now can cut your bill and your carbon at the same time. The catch: most cheap green tariffs are “100% renewable” only via REGO certificates, not by buying matching power in real time — if you want genuinely additional clean energy, pick a supplier that builds or buys its own generation.
Renewable energy that also saves money
Green tariffs used to carry a price premium. That has changed: many 100% renewable electricity deals are now priced competitively, and the cheapest green fixes beat the Standard Variable price cap — which is especially valuable with the cap rose to £1,862/yr on 1 July 2026. Roughly 40% of households are already on a fixed deal and unaffected by that rise; everyone still on the capped variable tariff will pay about £18 a month more unless they switch.
We compare the whole market on your real usage — including green fixed, variable and time-of-use (EV and heat-pump) tariffs — so you can cut both your bill and your carbon footprint. Enter your postcode and usage to see the renewable deals available where you live.
Best green energy tariffs for July 2026
Below is a snapshot of the green tariff types competing hardest right now and how each stacks up against the £1,862 cap. Exact prices vary by region and usage, so always run a personalised comparison — the figures here are typical dual-fuel direct-debit positions for July 2026.
Rates verified July 2026 against the confirmed 1 July Ofgem cap (£1,862/yr typical dual-fuel direct debit). “Below the cap” compares a fixed green deal’s annual cost with the new capped Standard Variable cost at typical usage.
What ‘green’ really means: REGO vs genuinely renewable
Not every “100% renewable” tariff is equal. The label can mean two very different things, and knowing the difference helps you avoid greenwash and pick the deal that matches your priorities.
REGO-backed (certificate matched)
The supplier buys Renewable Energy Guarantees of Origin (REGO) certificates equal to your annual use. It proves an equivalent amount of renewable power was generated somewhere on the grid over the year — but the supplier may not buy that power directly, and certificates can be cheap to acquire. Most budget “100% renewable” tariffs work this way. Still cleaner on paper than a fossil tariff, and usually the lowest priced.
Genuinely additional
The supplier owns wind, solar or hydro generation, signs long-term power-purchase agreements with renewable generators, or reinvests in new capacity. This adds clean energy to the grid rather than just re-labelling existing supply. Good Energy and Ecotricity are the best-known examples. Often priced around the cap rather than below it — you pay a little for real-world additionality.
And green gas?
There is far less genuinely renewable gas on the grid. “Green gas” tariffs usually carbon-offset your gas or blend in a small share of biomethane — useful, but not the same as 100% renewable electricity. For heating, the bigger carbon win is usually a heat pump on a renewable electricity tariff rather than a green-gas add-on.
Which suppliers offer the greenest tariffs
Good Energy
One of the few suppliers sourcing power directly from renewable generators — strong on genuine additionality, typically priced near the cap.
Ecotricity
Reinvests in building new wind and solar capacity (“bills into mills”). A genuinely-additional choice for impact-focused households.
Octopus Energy
100% renewable electricity, invests in its own generation and storage, and runs the best green EV and off-peak smart tariffs — often the cheapest green option overall.
So Energy
100% renewable electricity with competitively-priced fixed deals — a popular value pick for green fixes ahead of the July rise.
E.ON Next
Supplies 100% renewable-backed electricity as standard across its tariffs, with widely available green fixed deals.
OVO Energy
100% renewable electricity with smart and EV-friendly options, plus solar and heating add-ons for cutting whole-home carbon.
Availability and exact pricing depend on your region, meter type and usage. Run a comparison to see which of these are live for your postcode and how each compares to the new cap.
How to compare green fixed tariffs
1. Check the green credential
Decide whether REGO-matched is enough or you want genuinely additional supply. Both count as 100% renewable, but the impact differs.
2. Compare total annual cost
Look at the full yearly figure on your usage, not just the headline rate — include unit rates, standing charges and any exit fees, and compare against the £1,862 cap.
3. Fix before 1 July to beat the rise
A green fix locks your rate, so switching before the cap climbs protects you from the 13.5% increase. Take a meter reading on 30 June.
The July 2026 numbers, in context
The cap was confirmed by Ofgem on 27 May 2026 and only affects Standard Variable tariffs — the gas increase (about 24%) is far steeper than electricity (about 5%) because of wholesale gas costs. The next cap review is due 1 October 2026; current forecasting from Cornwall Insight points to roughly £1,899/yr for October (current-TDCV basis), so a green fix now offers both savings and certainty.
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Green energy tariff FAQs
Are green energy tariffs more expensive in 2026?
Not any more. Many 100% renewable electricity tariffs are competitively priced, and the cheapest green fixes sit below the £1,862 price cap that takes effect on 1 July 2026. Comparing the whole market on your usage usually surfaces a green deal that also beats your current rate.
Can a green deal still beat the £1,862 cap?
Yes. The cap applies to Standard Variable tariffs; a fixed green deal is set independently, and several 100% renewable fixes are currently priced below the new cap at typical usage. Locking one in before 1 July protects you from the 13.5% (£221/yr) increase.
What makes a tariff ‘100% renewable’ — REGO or real?
Most “100% renewable” tariffs are backed by REGO certificates, which match your annual use with renewable generation on the grid. The greenest suppliers go further by owning generation or signing power-purchase agreements — genuinely additional clean energy. Both are labelled 100% renewable, but additionality has more real-world impact.
Which suppliers offer the greenest tariffs?
Good Energy and Ecotricity stand out for genuinely additional, directly-sourced renewable power. Octopus Energy, So Energy, E.ON Next and OVO all supply 100% renewable-backed electricity, with Octopus also leading on cheap green EV and off-peak smart tariffs. Availability depends on your region.
Does the July 2026 cap rise affect green fixed deals?
No. The 1 July rise to £1,862 only changes the Standard Variable (capped) tariff — about 40% of accounts on a fixed deal are unaffected. A green fix keeps your rate steady until it ends, so switching before the rise is one of the surest ways to avoid the extra ~£18 a month.
Why is gas rising more than electricity in July?
The July cap reflects higher wholesale gas costs, so gas unit rates climb about 24% while electricity rises only around 5%. Gas goes to 7.33p/kWh and electricity to 26.11p/kWh. That makes 100% renewable electricity — and electrified heating on a green tariff — relatively more attractive.
Will energy prices fall later in 2026?
The next cap review is due 1 October 2026. Current forecasting from Cornwall Insight points to around £1,899/yr for October (current-TDCV basis) — broadly flat rather than a sharp fall — so waiting is unlikely to beat a good green fix you can lock in today.
Should I take a meter reading before 1 July?
Yes — submit a meter reading on 30 June. It ensures your usage up to that date is billed at the cheaper pre-July rate, and your new (or higher) rate only starts from 1 July. It is a quick, free way to avoid being charged the higher rate for energy you used earlier.
Compare green energy deals before the cap rises
100% renewable, competitively priced, many below the new £1,862 cap — compare and switch today.
No obligation. Reviewed July 2026.
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