Frequently asked questions
Here is a selection of questions we are frequently asked about energy suppliers, energy tariffs and the switching process.
We hope you find your answer here. If you still need help switching, contact us.
Cut your energy bills
Those switching energy suppliers using Which? Switch between 1 January and 21 October 2009 saved an annual average of £263.
Why wait to start saving? Compare gas and electricity tariffs now to find the best energy deal for you.
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Preparing to switch FAQs
- What information do I need to switch energy suppliers?
- How can I find out who my current energy supplier is?
- How do I find my electricity (MPAN) number?
- How do I find my gas (MPRN) number?
- Should we expect any price changes in the next coming months? When is the right time to switch?
- What is the best way to make savings?
- What is the most accurate way to enter my current tariff? By spend or usage? Annual or monthly figures?
Switching eligibility FAQs
- Can I switch if I am about to move house?
- Can I switch if I'm renting a property?
- Are there any reasons why I may not be able to switch?
- I'm a prepayment customer, can I switch?
Choosing a new supplier FAQs
- What payment methods are available?
- Why are some savings in red and some in black on the results page? Does the colour matter?
Switching process FAQs
- How does the switching process work? What do I need to do?
- Will my current energy service be interrupted?
- If I switch supplier, how long do I have to stay with my new supplier for?
- If I have a complaint or something goes wrong in the switching process, who do I contact?
After you've switched FAQs
- What happens if I switch and my new supplier changes their prices?
- What if I change my mind?
- When should I hear from my new energy supplier?
Which? Switch FAQs
- Why should I switch with Which? Switch rather than directly with an energy supplier?
- Do you work with all the energy suppliers?
- How frequently do you update your website?
- Why are the savings featured on your site different from those on another comparison service?
- How does Which? Switch make money?
- What different energy tariffs are available on this website?
- Why are some tariffs not featured on your site?
- Why are the rates on the website different from those that I am currently paying to the same energy supplier?
- Why can I receive quotes from some suppliers, but not complete the switching process with them on your site?
Energy supplier FAQs
- Do you work with all the energy suppliers?
- How can I contact energy companies directly?
- What are the benefits of switching energy supplier?
- How do I complain about an energy supplier?
- Why can I not find a specific energy supplier on your site?
Tariff FAQs
- Are there any energy tariffs featured on Which? Switch for the over 60s?
- Do you include historical energy tariffs in your comparisons?
- How do I find out if I am on an IGT tariff?
- What are IGT energy tariffs?
- What are online only energy tariffs?
- What is a capped tariff?
- What is Economy 7? And how can I change to this energy tariff?
- What is green energy?
- What are the requirements for green energy tariffs?
- What is a fixed energy tariff?