ChartJavascript is required to render chart Estimated network costs per domestic customer (GB average).Source: Ofgem analysis of network companies’ cost information .Information correct as of: March 2019 This chart shows our estimate of trends in the annual cost of the different components of network charges for a domestic customer with a fixed amount of consumption. Balancing Services Use of System charges are not included in the chart. Click the ‘more information’ tab above for a summary of the latest trends, an explanation of network costs and for further detail on how we calculate the costs. Policy Areas:Electricity - distribution Electricity - transmission Gas - distribution Gas - transmission Data Table Estimated network costs per domestic customer (GB average) Annualised network costsElectricity (transmission)Electricity (distribution)Gas (transmission)Gas (distribution) Apr-1532969120 May-1532969120 Jun-1532969120 Jul-1532969120 Aug-1532969120 Sep-1532969120 Oct-1532969120 Nov-1532969120 Dec-1532969120 Jan-1632969120 Feb-1632969120 Mar-1632969120 Apr-16391019120 May-16391019120 Jun-16391019120 Jul-16391019120 Aug-16391019120 Sep-16391019120 Oct-16391019120 Nov-16391019120 Dec-16391019120 Jan-17391019120 Feb-17391019120 Mar-17391019120 Apr-1737909114 May-1737909114 Jun-1737909114 Jul-1737909114 Aug-1737909114 Sep-1737909114 Oct-1737909114 Nov-1737909114 Dec-1737909114 Jan-1837909114 Feb-1837909114 Mar-1837909114 Apr-1835859113 May-1835859113 Jun-1835859113 Jul-1835859113 Aug-1835859113 Sep-1835859113 Oct-1835859113 Nov-1835859113 Dec-1835859113 Jan-1935859113 Feb-1935859113 Mar-1935859113 Apr-19358710114 May-19358710114 Jun-19358710114 Jul-19358710114 Aug-19358710114 Sep-19358710114 Oct-19358710114 Nov-19358710114 Dec-19358710114 Jan-20358710114 Feb-20358710114 Mar-20358710114 More information Estimated network costs per domestic customer: At-a-glance summary The majority of network costs for a domestic customer are for the use of the gas and electricity distribution networks. For a household whose consumption does not change, on average across GB network costs in 2019/20 will increase for gas distribution, electricity distribution, and gas transmission. For electricity transmission, costs compared to the previous charging year will rise broadly in line with inflation. Actual costs will vary depending on where a customer lives, how much energy they use, and what type of meter they have. What are network costs? Suppliers are charged for the costs to build, maintain, improve and operate the energy networks. Most of the networks are owned by monopoly businesses. Therefore through regulation, we limit the revenue that these companies can recover from customer charges to run the networks. The network charges paid by suppliers vary depending on where their customers live, what type of meter they have, when energy is used and how much energy they use. In total, these charges accounted for approximately a fifth of a dual fuel bill in 2019. Different charges apply for the high voltage/pressure transmission networks (which take electricity and gas around Great Britain) and the lower voltage/pressure distribution networks, which connect customers to the overall networks. As well as the charges to suppliers that are considered here, electricity generators and gas producers are also charged for their use of the networks. It is important to note that trends in network costs will therefore also affect supplier costs indirectly through wholesale prices. Methodology Network costs are calculated by combining charging information published by the network companies with assumptions about consumption and losses for domestic customers. All costs are calculated for medium annual typical domestic consumption values of 12,000kWh for gas and 3,100kWh of electricity, which is held fixed across the charging years. The actual network costs a supplier incurs to serve a customer will depend on how much energy is used, the timing of its use as well as the charges that apply from one year to the next. The costs shown are GB averages, calculated by taking a simple unweighted average of the tariffs that apply in different regions of the country. The costs are expressed in nominal money (i.e. the amount of money a customer ‘pays over the counter’), rather than in real terms (i.e. after adjusting for inflation). For electricity, the costs reported are for a standard unrestricted meter. Balancing Services Use of System charges are not included on the chart. These charges cover the cost of services used to balance the electricity system and internal system operator operating costs. The methodology we use to calculate these charges is consistent with our methodology for the Default Tariff Cap. Further details on the calculations are available in our Default Tariff Cap publications. Further information You can find further information on the different components making up an energy bill at Understand your gas and electricity bill. To see how the network fits together, visit The energy network: How it works for you. Date correct March 2019 Policy areas Electricity - distributionElectricity - transmissionGas - distributionGas - transmission