According to the CRU[1] as of June 2020, wholesale and network costs comprise circa 70% of electricity bills, with the remainder divided between supply costs, the PSO levy and VAT. For gas, wholesale and network account for circa 62% of the bills, with the remainder consisting of supply costs, the carbon tax, and VAT.
[1] CRU20125 Factsheet Domestic electricity and Gas bills in Ireland
