The Department of Energy and Climate Change (DECC) has found that participating households had saved a total of £2.7 million across 27 collective switching schemes.
More than 21,000 people have saved an average of £131 off their energy bills by taking part in the schemes. A scheme in Nottingham saved an average of £225 per household.
Energy secretary Ed Davey said: “Up and down the country, collective switching schemes have saved people money and increased engagement in the energy market.
“Collective switching gives power to communities by bringing people together to find the best deal for them.”
Davey also added that the Decc would continue to facilitate new schemes, and a further 77 local authorities are planning to run new collective switching schemes.