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Tonik Energy

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Tonik Energy

Tonik Energy invites customers to ‘be part of the clean energy revolution’ and supplies only 100% renewable electricity tariffs. Should you switch to Tonik?

Tonik Energy promises customers cheaper bills and greener energy. It says its ambition is to halve customers’ energy bills by 2022 by helping them to produce their own energy.

At the moment, Tonik sells only 100% renewable electricity tariffs. It lets customers choose whether to include 10% green gas - this is produced from animal and vegetation waste. 

Tonik's greenest tariff offsets 90% of fossil fuel generated gas by investing in carbon reduction projects.

Based in Birmingham, Tonik counts its customers as part of its ‘positive energy club’ and gives them information on their energy usage and how to save.

Besides gas and electricity, Tonik sells solar pv panels, chargers for electric vehicles and heating insurance from HomeServe. It plans to sell home batteries later in 2019.

Read on to find out how Tonik’s customer service compares or compare gas and electricity prices with Which? Switch to see if it can save you money on energy.

Tonik Energy customer score

Tonik came joint fourth (with not-for-profit firm Ebico) out of 30 energy companies rated by 7,429 members of the public in the annual Which? energy companies customer satisfaction survey. 

Tonik customers gave generally good feedback and ratings across the areas of its service we asked about, but were especially complimentary about its bills, online customer service and being value for money.

Tonik customer score breakdown

The graphic below shows the breakdown of Tonik’s scores from our latest survey.

Find out how Tonik Energy compares with other energy companies included in our survey. See the full results of the best and worst energy companies 2019.

Which? verdict on Tonik Energy

It’s the first time we’ve had enough responses from Tonik Energy customers to be able include the firm in our survey, and it scores very well in comparison to other suppliers included. 

It is ranked well above the Big Six energy suppliers, and one position above Ovo Energy – the largest ‘challenger’ brand.

The top-scoring firm (Octopus Energy) achieved five stars out of five in each category, but Tonik Energy wasn’t far off.

Value for money was rated the full five stars by Tonik customers. Tonik Energy often sells cheap tariffs which have no exit fees. Plus it pays 3% interest on credit balances. 

One of its tariffs is designed specifically for electric vehicle owners.

Customers were impressed with both the accuracy and clarity of Tonik’s bills. It was one of just three firms in our latest survey to achieve five stars from customers on both aspects.

Online customer service was also praised highly in our survey. Customer service on the phone was rated four stars out of five, indicating that customers find it good (rather than excellent).

Tonik Energy’s efforts to help customers understand and reduce their energy consumption were also rated good by its customers.

Pros: Customers consider its bills, online service and value for money as excellent, it pays 3% interest on credit balances on some tariffs

Cons: Does not currently supply customers with prepayment meters

Tonik electricity sources

Tonik Energy in the news


February: Tonik Energy announced that it will increase the price of its standard variable tariff (Life Energy) by 14% from 1 April. This is the date that Ofgem is increasing the price cap and allowing energy companies to charge customers more.

Customers will pay £144 extra per year and the tariff will cost £1,192 per year for a medium energy user. It’s still less than the maximum permitted by the cap though, which many other suppliers plan to charge.


August: Customers on the Life Energy variable tariff paid £34 more per year on average after Tonik raised prices by 6%.