Cost of sales and contracted work

The cost of sales and contracted work increased by €40 million compared with 2020.

The increase in the purchase costs is mainly attributable to purchases of energy, owing to the increase in TenneT's rates, with an impact of around €10 million, and higher costs for purchasing for network losses owing to increased energy prices, with an impact of around €44 million. This was partly offset by a decrease in contracted work owing to a decrease in external costs (around €14 million) by making more use of internal resources.