Gas & Electricity Tariff Prices per kWh

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There are a number of costs that go into making up your annual energy bill, but the price you pay for your actual gas and electricity can be broken down into two distinct parts – the standing charge and the unit rate.

  • Standing charge - this is a fixed amount that you are charged each day, regardless of how much gas or electricity you use.
  • Unit rate - this is the price you will pay per unit, measured in kilowatt hours (kWh) of energy, so it can fluctuate depending on how much energy you use.

Although energy tariffs without standing charge are available, all contracts come with a unit price for gas and electricity, that’s either fixed or variable depending upon the type of deal you’re on.

Each energy supplier will set its own rate, but figures from the Energy Savings Trust show that standing charges for electricity are usually around 20p per day, although you may be charged between 5p and 60p per day. Gas is charged at an average rate of 24p per day, but can be anywhere between 10p and 80p per day.

Both gas and electricity consumption is measured in kWh. The unit rate you pay will vary depending upon the energy price plan you’re on, and even the region you live in, but the average cost of electricity per kWh is 14.37p, and the average gas cost per kWh is 3.80p.

What is a kilowatt hour (kWh)?

A kilowatt hour (kWh) is a measure of energy that equates to 1,000 watts – or 1 kilowatt (kW) of energy being used for one hour. The performance of every electrical household appliance is measured in watts, and you can find the wattage of any item on its packaging or label.

How work out how much energy is used by an appliance

When you know the wattage of an appliance, you can then work out how many kWhs you spend running it by multiplying the wattage by the number of hours used, then dividing this figure by 1,000.

So, if you have a 200W desktop computer and use it for ten hours, you will have spent 2kWh running this device - 200(Watts) multiplied 10(hours) = 2,000, then 2,000 divided by 1,000 = 2kWh.

How work out how much it costs to run an appliance

If you want to know how much money it costs to run your 200W computer, you need to multiply the kWhs used by your electricity supplier’s rate – so if your supplier charges the average UK electricity price of 14.37p per kWH, it would cost 28.74p to run it for 10 hours.

If you want to work out how much it costs to run other household appliances, such as washing machine and televisions, check out our Energy Running Costs Calculator.

How are energy bills calculated?

When calculating the price of your energy bill, your energy provider will monitor how many kilowatt hours of gas and electricity you use over a certain period of time, and then multiply this by the price per unit set in your tariff.

The number of days covered by the billing period is then multiplied by the tariff’s daily standing charge cost. The two figures are then added together to give you a total figure for your bill.

What are the current gas and electricity unit rates?

The tables below show the current leading electricity and gas tariffs on the market, by average unit cost per kWh. These figures should be used only as an indication of price, as the actual price charged for any specific tariffs will be different depending on where in the country you live.

In order to get accurate results for your property, it’s important to carry out a full market comparison by entering your postcode in the box at the bottom of the page. Full details of tariff unit prices and standing charges will be displayed within this comparison.

Electricity tariffs by unit (kWh) rate

Supplier Tariff Avg. kWh unit price (ex VAT) Annual Standing Charge (ex VAT)  
ScottishPower Online Fix and Save August 2018 12.376 pence £114.28 Compare prices
ScottishPower Help Beat Cancer Fix and Save August 2019 Online 12.376 pence £142.82 Compare prices
Sainsbury's Energy Price Promise December 2018 12.803 pence £87.86 Compare prices
British Gas All Online January 2019 12.942 pence £86.87 Compare prices
Sainsbury's Energy Price Freeze November 2018 13.211 pence £87.86 Compare prices
Extra Energy Bright Fixed Price Oct 2019 v1 13.351 pence £100.38 Compare prices
E.ON E.ON Saver Fixed 1 Year v13 (Paper Billing) 13.395 pence £57.09 Compare prices

Gas tariffs by unit (kWh) rate

Home gas and electricity price comparison


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