Best energy deals and suppliers: Electricity and gas comparison

We’ve seen energy bills fall due to cuts in the energy price cap. For a typical household that uses gas and electricity and pays by direct debit, the cap dropped on 1 July 2024 from £1,690 to £1,568 per year – a reduction of £122, or around 7%. That’s a long way from the eye-watering £3,280 price cap on 1 April 2023, but is still a significant sum and it may rise again later in 2024.

You may already be on the cheapest deal, but some households can cut their bill by switching, so it’s worth checking.

Here we’ve set out what you need to know, from the types of tariffs to a step-by-step guide to switching.

Tariff. A tariff is a pricing plan that energy providers use to charge customers for their electricity and gas use. The price you pay for your energy use will depend on the tariff you sign up for, like a mobile phone plan.
Kilowatt-hour (kWh). A kilowatt-hour is the unit of energy that suppliers use to bill households for their energy use. Each energy tariff will charge customers an amount per kWh used.
Standing charge. Energy suppliers also typically charge a fixed daily fee for providing you with energy, no matter how much you use. This is charged for each energy source, so if you have gas and electricity you’re charged 2 separate standing charges. Customers who pay by monthly direct debit will usually receive a bill listing 2 amounts: the cost of energy used and the total standing charge for that period.

What types of electricity and gas tariffs are there?

We’ve set out the key need-to-knows for the different types of energy deals available, including any fees involved.

Standard tariff

This type of energy tariff, sometimes called a standard variable rate (SVR) or “default” tariff, is one where the unit price you pay for your energy can go up and down with the energy market. You’re not locked into a contract, so if you find a cheaper tariff elsewhere you can switch without any exit fees. But these tariffs are rarely the cheapest deal.

Fixed tariff

This locks in the unit price of your energy for a period of time: 1, 2, 3 or even 5 years. This can be a way to guard against future price increases caused by fluctuations in the energy market. However, you’ll typically be hit with a penalty fee if you want to switch before your fixed contract period is up.

Dual fuel tariffs

This just means you’re getting electricity and gas from the same supplier. Sometimes referred to as “bundling”, dual fuel energy tariffs can be cheaper, as suppliers have even more reason to want you to stay.

Time-of-use tariff

Designed to encourage you to use energy at times when supply is cheaper, these charge different unit rates depending on the time of day you use energy. Economy 7 is an example. These plans charge less for energy consumed at off-peak periods, usually a 7-hour period from late at night to the early hours of the morning, hence the “7” in the name.

Pre-payment tariffs

These tariffs are for those who have a pre-payment meter and pay in advance for gas and electricity by topping up their meter using prepay tokens, cards or a key. This is typically one of the most expensive ways to power your home.

“Green” energy tariffs

A “green” tariff can be 1 of 2 things: Either the supplier will promise to match your usage with generation from renewable sources of energy, or it will contribute towards environmental schemes on your behalf.

Feed-in tariffs

This is where you’ve installed solar panels or wind turbines at your property, and the energy suppliers pay you for the energy you produce. There are no longer any new feed-in tariffs available on the market, but existing customers with feed-in tariffs can switch suppliers without losing the payments they receive from selling energy back to the national grid.

How to choose the best energy deal

1. Shop around every year. Many households have no idea how much they can save by switching energy provider. Keeping an eye on the latest tariffs can help you save potentially hundreds a year.
2. Make a note of when your current tariff ends. If you’re on a fixed tariff, it’s a great idea to check what deals are available with other suppliers via comparison sites shortly before your current fix ends. This way you can switch over quickly and start saving sooner.
3. Get your details right. When using comparison sites, it’s helpful to get your household details as accurate as possible. Some sites have helpful options to estimate how much energy you’re likely to use based on the type of building you live in and how many people are in your household. But calculating your actual energy use based on past meter readings can give you a more accurate forecast of how much a particular tariff will cost you.
4. Find the right tariff for your usage. If you’re usually out of the house at work during the day, it might make sense to shop for time-of-use tariffs that mean you pay less for energy use at night. Electric vehicle owners who want to charge their vehicles from home can also benefit from these types of tariffs, particularly if they can plug their cars in overnight.
5. Could you save money with a dual fuel tariff? If your household uses gas and electricity, you may find it cheaper to go with one supplier for both fuel sources. This is because suppliers can offer deals designed to stop you from wanting to switch.

How much could you save?

To illustrate how much it’s possible to save by shopping around for your energy supplier, here is an example of 2 dual fuel tariffs (paid by direct debit) with prices fixed for 12 months for a 3-bedroom home in the Birmingham suburb of Edgbaston.

These projections are based on dual fuel tariffs paid by direct debit and fixed for 12 months. Usage figures are based on typical annual domestic consumption values published by industry regulator Ofgem. These are 11,500kWh for gas and 2,700kWh for electricity.

You can check whether you can make savings by using the free, quick tool on our partner Uswitch's site.

Most costly 1-year fixed dual fuel tariff we found in April 2024

• Projected annual cost = £1,878.16 per year
• Estimated monthly cost = £156.51
• Exit fee (per fuel) = £75

Cheapest 1-year fixed dual fuel tariff we found in April 2024

• Projected annual cost = £1,627.03 per year
• Estimated monthly cost = £135.59
• Exit fee (per fuel) = £25

How to switch your energy supplier: Step by step

1. Collect the information you’ll need to identify a new supplier. You’ll need your postcode, the name of your current supplier, the name of your current energy tariff and your annual energy usage or costs.
2. Use a comparison site to identify a new suitable tariff. Comparing providers this way can give you a quick, personalised estimate of savings you could make. It may also be worth contacting your current supplier to ask if it will match a better offer elsewhere.
3. Consider your options. While a key factor affecting your choice is likely to be price, it’s worth considering a provider’s customer service reputation, how easy the new tariff would be to switch away from if required later and whether the tariff markets itself as being green.
4. Look for the switching guarantee. Some suppliers offer the Energy Switch Guarantee, designed by energy market watchdog Ofgem, which gives customers confidence that their switch will be handled correctly. Providers who have signed up to the guarantee promise to pay customers £30 compensation if their switch takes longer than 30 days.
5. Confirm your contract and payment method. You’ll be offered several payment methods. Paying by monthly direct debit can usually save you money.
6. You have time to change your mind. You have a 14-day cooling-off period from the time you sign your contract to back out penalty-free if you change your mind.
7. Wait for your new supplier to get in touch. Your new supplier will contact you with a switching date. This usually takes around 2 weeks.
8. Settle up with your current supplier. You’ll need to submit a closing meter reading to your current supplier before it closes your account. You should then receive a final bill within 6 weeks. If your account is in credit, you should receive a refund within that time.

Best energy companies

Although price is a huge decider when it comes to picking your energy provider, it shouldn’t be the only factor at play. You’ll want to choose the provider that’s trusted and holds a good reputation for the way it treats its customers.

While picking from this ever-changing list can be daunting, shopping around and doing your research can help you to find the perfect option, whether you’re looking for the cheapest deal on the market, renewable energy, great online service, smart meters or a local firm.

Here are the suppliers that the charity Citizens Advice has given the highest customer service scores for October to December 2023, based on data from industry regulator Ofgem, customer surveys and information from the suppliers themselves.

• Shell Energy
• Outfox The Market
• E.ON Next
• Utility Warehouse

Ready to compare energy?

Frequently asked questions

We’ve put together a list of the most asked energy questions by our users.

• Do I have to contact my current supplier if I switch?

  No. New suppliers take care of everything, including cancellation of your old tariff. Similarly, new suppliers will organise the switch date. This means you won’t be charged twice for the service. You may need to supply a final meter reading with your old supplier and also make sure you cancel your direct debit after your final payment, just to be on the safe side.

• How long does switching take?

  Most switches are done within 17 days, but it can take up to 3 weeks. Your new supplier will let you know your exact switch date. Also check if the supplier you want to switch to is signed up to the Energy Switch Guarantee. The guarantee means suppliers have to stick to certain rules such as allowing a 14-day cooling-off period if you change your mind or aren’t happy with your service.

• Will I be billed twice?

  New suppliers will only start charging from your switch date. So no, you shouldn’t be charged twice. Do cancel your direct debit though, just to make sure.

• When do I begin paying my new supplier?

  The old supplier will send you a final bill for the period up to the switch date. On that date, the new supplier takes over.

• Will I be charged an exit fee for leaving my current supplier?

  If you switch within the 6–7 weeks before the end of your current plan, the exit fee will be waived. This is a rule put in place by Ofgem and all suppliers have to follow it.

• Should I cancel direct debits?

  After the final payment, cancel your direct debit just to be on the safe side.

Energy prices rise and fall. Get guidance on whether it's the right time to switch by using the personalised quick checker from our partner, Uswitch.