You will often see either usage charges and supply charges on your energy bill. Usage charges are measured in kilowatt hours (kWh) of electricity or Megajoules (MJ) for gas. In addition to your usage, energy retailers will also charge customers for supplying their property with electricity or gas, usually charged as a daily cost (cents per day).

You will continue to pay a supply charge so long as your property has gas or electricity connected to your home. If you go away on holiday for a few weeks, your usage may be lower during that time, but your supply charge will remain the same.

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