Prepayment meter tariffs

With this type of meter you pay for the energy as you use it. However the tariff rate set on your meter may not always exactly reflect the published tariff rate. In this instance the payments you make to top up the meter, will be compared to the amount due based on the published tariff rates, and any differences will be shown on your statement.

Prepayment tariffs are structured to contain a standing charge element. This ensures that all Prepayment customers will receive the same effective service, and the money you pay properly reflects the cost of supplying you.

The quarterly standing charge covers the fixed costs of providing the energy supply e.g. the cost of linking the mains supply to your home, providing a meter, reading your meter, processing your payments through our network of agents and processing and sending out your statements. The standing charge is paid irrespective of the amount of electricity or gas you use.

Prepayment Electricity - Standard Rate, Domestic Tariff open/close

The majority of customers who use most of their electricity during the day, and who do not in the main use electricity to heat their house and/or to produce hot water are likely to benefit from this tariff. Your bill is based on:

  • A standing charge
  • A unit charge for the units of electricity you have used

The price for a unit of electricity is the same whether you use it day or night.

One unit is 1 kilowatt of electricity or gas used for one hour (kWh).

Prepayment Electricity - Economy 7 Rate, Domestic Tariff open/close

Customers with a two rate meter fitted, who use most of their electricity at night to heat their house and/or to produce hot water are likely to benefit from this tariff. The tariff has:

  • A standing charge
  • A higher unit charge for electricity used during the day
  • A much cheaper rate for units of electricity you use during a 7-hour period at night

One unit is 1 kilowatt of electricity or gas used for one hour (kWh).

The quarterly standing charge for Prepayment Economy 7 electricity is more expensive because a timeswitch or radio tele-switch is provided and because it has two registers instead of one.

Prepayment Gas open/close

Your bill is based on:

  • A standing charge
  • A unit charge for the units of gas you have used

Find out more about npower electricity and gas prices.

Credit meter tariffs

Switching Supplier open/close

Joining npower

If you have a prepayment meter with a debt of less than £500 for either gas or electricity you may be able to transfer the debt to your new account with npower. If you decide to go ahead and transfer your supply to npower you will receive a letter from your current supplier advising you have an outstanding debt. You will then need to contact us with a meter reading and to agree that your current supplier can provide us with details of your outstanding debt. We will liaise with your current supplier regarding the transfer of your debt and provide you with updates on how this progresses.

Changing Supplier

If you'd like to switch to a prepayment tariff with another supplier and there's a debt of less than £500 for either electricity or gas on your npower account, you may be able to transfer the debt to your account with your new supplier. We may still object to your transfer if you owe us money. If we object we will write to you and advise you of the next steps. You will need to contact your preferred supplier with a current meter reading and ask them to let you transfer your outstanding balance to your new account with them. We'll need to provide details of your outstanding balance to your preferred supplier. In line with data protection rules, you’ll need to agree to this data being exchanged, so your preferred supplier will ask for your consent when you speak to them. You’ll also need to give them your meter number [MPAN/MPRN]. In the meantime we’ll carry on supplying you.