6. Cost of subcontracted work, materials and other external expenses

Expenses are allocated to the financial year to which they relate.

€ Million

2023

2022

Subcontracted work

91

74

Materials

27

27

IT costs

88

86

Other external expenses

50

49

Total

256

236

The cost of subcontracted work, materials, and other external expenses rose by € 20 million in 2023 compared to 2022. This increase is mainly attributable to price indexation and an increase in the work carried out for the energy grid in 2023. In addition, housing and sector project costs were higher.

Auditor's fees

Fees charged by Ernst & Young Accountants LLP in the financial year for the audit of the financial statements of Enexis Holding N.V. and Enexis Netbeheer B.V. amounted to € 0.7 million in 2023 (2022: € 0.7 million), and for other audit services € 1.0 million (2022: € 0.1 million), and for other assurance services € 0.1 million (2022: € 0.1 million). No services of any other type were provided. The audit expenses for 2022 have been paid.