Our mission

We face a climate emergency.

Urgent action is required to switch the world to low carbon power, and yet, our energy system is broken: tied to fossil fuels, needlessly complex, and overpriced for those who can least afford it.

We want to change that. We believe that nothing should stand in the way of people making green energy choices.

Our mission is to help every home and business in the UK switch to renewable energy.


Business done better

We’re a certified B Corp; part of a growing movement of companies around the world that believe business must be used as a force for good. Beyond helping homes and organisations switch to renewable energy, that means verifying the green claims of the suppliers we recommend, ensuring green energy is affordable for all, and doing all we can to reduce negative environmental impacts in our own operations. You can find out more about the B Corp movement here.
The ‘B Corp Pending’ logo is used by accredited businesses that have been trading for less than a year.

About our suppliers

We only list tariffs where the supplier can guarantee that 100% of the electricity sold is matched by energy from renewables – sun, wind, water and biofuels. You can find out more about how we determine whether a tariff can be listed on our site in our Supplier and Tariff Selection Policy. If you have suggestions on how we can improve this policy, drop us an email.


Working in partnership

We’re working with the UK’s leading businesses, NGOs, councils and renewable energy suppliers to put the record straight, and in the process, make it as simple as possible for people to switch to cheap, green energy. If you’d like to find out how your organisation can work with us, download our partnerships brochure.

Partnership Brochure

What do we mean by 'green energy'?

Power stations, wind turbines and solar farms all feed their energy into the Grid, like rivers running into a big pond. When you switch to green energy, your supplier guarantees that however much electricity you take out of the ‘pond’, the same amount of clean energy will be put in. The more people who switch to clean tariffs, the more renewable energy goes into the pond and the cleaner it gets.


How we cover our costs

Our costs are covered by the commission we receive from energy companies when members switch – usually around £30 for each fuel (electricity or gas). The commission doesn’t affect the price of the tariffs, which are the same price as they are on suppliers’ own sites (apart from where we’ve negotiated an exclusive deal that’s only available through Big Clean Switch).


What we do with the commission

When a member joins us through one of our charity or corporate partners, we pass on half of the commission directly to the partner, who usually uses it to support good causes. The rest is used to pay off the money we’ve spent to create the campaign. We won’t make any profit for the first year or two, after which at least 5% of any profits will go to good causes tackling climate change, on top of the commission we pass back to partners.


Renewable Energy Sources

 Here’s a summary of where all our supply partners source their renewable electricity:
Figures for hydro may include electricity sourced from rivers, wave and tidal. Co-op Energy figures relate to their ‘Community Power’ tariff. Co-op Energy partners with Octopus Energy – for all other Co-op Energy tariffs, please refer to Octopus Energy fuel mix below.
  • Wind
  • Solar
  • Hydro
  • Biofuels
  • Bulb
    51 40 9
  • Bristol Energy
    48 8 6 38
  • Co-op Energy
    70 25 5
  • Ecotricity
    99 1
  • Good Energy
    57 18 5 20
  • GoTo Energy
    66 17 17
  • Octopus Energy
    18 32 1 49
  • People's Energy
    34 33 33
  • So Energy
    44 30 19 7