How It Works

WattsWatt has been created to help households make better informed energy choices. Our guarantee to you is that you will never overpay for energy again. We only show you the information you need in order to select the best value tariff.

1. Register to use the WattsWatt service

Enter your email address and follow the simple confirmation steps. This allows us to verify you.

OR CALL! If you don’t want to register, you can simply give us a call on 0330 633 8811 and we can talk you through the tariff advice. We will need you to have your latest energy bill with you.

2. Select your address

All energy tariffs are dependent on where you live. Enter your address details as requested.

3. Choose how you’d like us to learn how much energy your household normally uses

You might see this described as ‘annual consumption’. There are four options.

  1. Authorise WattsWatt to access your smart meter data. This involves getting a code from the bottom of your in-home smart display which was provided by your supplier.
  2. Enter your annual consumption which can be found on your latest energy bill. You will have one annual consumption figure for the types of fuel you use, for example, one for gas and one for electricity. This will be an amount of kWhs (kilowatt hours) for both fuels.
  3. Tell us how large your home is and how many people live there. We will estimate your annual consumption. This is our least preferred option as it’s not precise.
  4. Read your annual consumption figures from your energy bill over the phone when you call.

Why does my annual household consumption matter? The way tariffs are calculated is based on a unit rate for every kilowatt (kWh) of fuel you use and a daily standing charge for each fuel. We need to know how many kWhs you use to work out the best value tariff for your energy needs.

4. Tell us how you would like to pay for energy

There are three main ways that households can pay for energy. The way you pay for energy affects the price of energy, so choose carefully.

  • By direct debit: This may be a fixed direct debit amount that is designed to cover your costs for the year, or may be a variable direct debit, which means you are only charged for what you use. Not all energy suppliers offer variable direct debits. All suppliers offer fixed direct debits.
  • When you receive an energy bill: This is called standard credit. By paying for energy this way you tend to pay a higher amount due to the debt risk that the energy supplier is accepting, should the bill not be paid. Direct debit or prepayment options are the cheapest payment types.
  • Prepayment: This is where the household pays for the energy before they use it. For households with smart meters, payments can be made digitally via an app, but for households without smart meters, a trip to a local top-up point will be required.

5. Check your personalised tariff results

WattsWatt will present a list of fixed tariffs that will provide you with the most energy for your money.

If you are on a standard variable tariff

All fixed tariffs that WattsWatts displays to you cost between 5% to 14% less than staying on a standard variable tariff. You will be far better off choosing a fixed tariff.

If you are already on a fixed tariff

You will need to check how the rates compare to the fixed tariff you are already on - please check the following:

  • Daily standing charge for each fuel
  • Unit rate for each fuel
  • Exit fee if choosing to leave the tariff - this normally around £50 a fuel

If the tariffs WattsWatt is listing are still better value after checking these rates, then you are best to switch.

6. Check the real life examples

We have included examples of how much a radiator, a fridge-freezer and a TV will cost to run. This helps households to see how the tariff will impact electricity and heat use.

Example WattsWatt Tariff

7. Time to switch

It’s easy to switch to your chosen tariff. Simply click switch and we will do the rest for you. Your switch should happen within 5 days and your new supplier will inform your previous supplier that you are leaving. You have a 14 day cooling-off period from the day after you click to switch. See FAQs here.

8. Note down your meter readings

If your meters aren’t yet smart-enabled, you’ll need to note down your meter readings to make sure you don’t overpay for any energy. Note your meter readings again when the new supplier informs you that your tariff switch is complete. See FAQs on meter readings here.

Got any questions? Search our FAQ here, drop us an email, or give us a call on 0330 633 8811.