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How to compare energy tariffs

Comparing is quick and easy. You can use energy comparisons sites or speak to energy suppliers directly to see what deals are out there.

To accurately compare energy tariffs look at your latest Energy Bill or Annual Summary so you can make a note of the following:

  • The name of your energy tariff(s) and the unit rates
  • Your energy consumption figures costs
  • Any exit fees or additional charges

The above information should be all that’s required for an energy comparison site to give you a good indication of other deals. However, before you switch it’s a good idea to use one of the three additional energy comparison tools, outlined below, to compare the new tariff with your old one.


The Tariff Comparison Rate (TCR)

This Tariff Comparison Rate is a quick way of comparing energy tariffs from different gas and electricity suppliers – but it isn’t personalised to you.


You’ll find Tariff Comparison Rates in energy suppliers’ communications, on their websites and on sites that compare energy prices. Suppliers use them as a way to advertise their gas and electricity tariffs (and how competitive they are) in much the same way mortgage and credit card providers do with APRs.

The main thing to bear in mind about Tariff Comparison Rates is that they are a quick way to compare each supplier’s energy tariff and prices. There will be a TCR for each type of energy tariff – shown in pence per kWh (p/kWh), based on medium usage.

Tariff Comparison Rates can provide a useful starting point when comparing gas and electricity prices, but it’s still important to find out what’s right for you based on more personalised information. For that, you’ll want to have to hand your personal projection or personal energy consumption.


The Tariff Information Label


The Tariff Information Label is a standard way of presenting key facts you need to know about a specific energy tariff.


1. Current tariff information

The name of the energy supplier the Tariff Information Label applies to.
Tariff name
For example, Online Standard.
Tariff type
For example, variable tariff with no end date.

2. Payments and charges

Payments method
This shows the ways you can pay for the named tariff (e.g. via direct debit).
Unit rate
This is the rate you will pay for every unit of electricity or gas you use. It will be displayed in pence per kWh).
Standing charge
A standing charge is a fixed cost associated with energy provided to you – it includes things such as meter reading, maintenance and the cost of keeping you connected to the network. It will be displayed in pence per day (p/day).

3. Tariff terms

Price guaranteed until
The cost of the specific tariff is guaranteed to remain the same until this date or beyond.
Exit fees
This is how much it will cost you to cancel the tariff early. . If your tariff has exit fees then they don’t apply as of 49 days before the tariff end date, which gives you time to shop around so you’re always on the best deal.

4. Discounts and extra services

Discounts and additional charges
Sets out any discounts associated with the named tariff (e.g. for managing your account online), along with any additional charges.
Additional products or services included
This highlights any extra products or services, such as supermarket loyalty points.

5. Consumption and charges

Assumed annual consumption
This is the annual consumption of a medium user.
Estimated annual cost
This is a figure that represents the annual cost a medium user will pay on the tariff. It will be shown in pounds per year (£/year).

6. Tariff Comparison Rate

Tariff Comparison Rate (TCR):
This is a quick way to help you compare your tariff with others. Find out more about TCRs here.

Tariff Information Label

Tariff Information Label

Personal projection

Just like it says, this is personal to you and estimates your annual energy cost for the next 12 months.


The personal projection is useful when shopping around. That’s because it estimates how much you’re likely to pay for energy over the next 12 months, making it easier to compare energy tariffs.

Your personal projection will be shown as an annual cost in pounds (£), and will be displayed on your energy bill in the ‘Could you pay less?’ box. It will also appear on your annual energy summary and on any price increase notices. Plus, you can request a personal projection from your energy supplier at any time.

Before you sign up to a new gas or electricity tariff, the supplier must give you a personal projection – and they will have to tell you what’s included in the calculation. This will allow you to accurately compare energy tariffs.

Start comparing energy tariffs
Price comparison sites are a good way to accurately compare energy prices, from different suppliers.


Learn how to compare energy tariffs

View Ofgem’s extensive list of accredited energy comparison sites to help calculate how you could save by switching.