Save up to £220* on our competitive green tariffs plus a £50 donation to Zero Carbon World and free boiler service (usually £84)!

We are proud to be the energy partner for Zero Carbon World, helping people switch to green energy that leads to fewer emissions and cleaner air for people and animals alike. Not only that, but we’re donating £50 to Zero Carbon World and a free boiler service for each and every person who switches their energy supply to us using this webpage. To ensure we can make this donation, please start your quote below and complete your switch online.

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Switch to renewable energy for savings that save the planet

Get a quote

Green Energy. Great Savings. Simple

You love a hassle-free service, we love saving the planet. Working together, we can do both! Each person who signs up to our renewable energy helps make our atmosphere that little bit cleaner, cutting down on the air pollution that has a detrimental impact on our health, and the emissions that are damaging our environment. Renewable energy, and award-winning customer service - what's not to love?

* Savings are compared to standard variable tariffs offered by Big Six Energy Suppliers for an average customer as defined by Ofgem

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FREE Boiler service with the Gas Boiler Service Plan through HomeServe

Having a reliable boiler to bring heating and hot water to your home is a daily essential. But just like a typical car service, you need to get it checked regularly to make sure it's working properly. That's why Tonik have teamed up with HomeServe, one of the UK's leading home assistance providers, to offer a Gas Boiler Service plan through HomeServe completely FREE in the first year (usually £84) for renewing customers. A HomeServe approved Gas safe® registered engineer will conduct a service on your boiler free of charge. They will also offer advice and tips on using your heating more efficiently. Having your boiler serviced regularly may reduce the risk of a breakdown and may also help to prolong its life.

Please note:

Owing to the Covid-19 pandemic HomeServe need to prioritise emergencies and put their most vulnerable customers first, but don't worry your first Gas Boiler Service will still take place after 6 months of your plan start date.

Offer Terms & Conditions

Gas Boiler Service Plan Terms & Conditions

Here's how it pays to join Tonik!

When you switch your energy supply to Tonik, our award-winning customer service and sustainably priced green energy come as standard, but there’s more – we reward our members for each step they take to help rid our skies of dirty, fossil fuel emissions.

Switch to green energy with us and we'll donate £50 to say thanks!

Refer your friends. You get £25 off your bill. They get £25 too.

Get a free gas boiler service through HomeServe usually £84

Switch to green energy in just two minutes


Get a quote

Get a quote

Get a quote

Choose your renewable energy tariff and then we'll take a few quick details.


Leave t he rest to us

Sit back. Relax. Feel good about the good you've done for the planet.

Ask a question?