16. Volume- and tariff-related timing differences
| In millions of CHF | Grid utilisation | General ancillary services/balancing energy | Active power losses (individual ancillary services) | Reactive energy (individual ancillary services) | Power reserve | Solidarised costs | Total volume- and tariff-related timing differences | Thereof surpluses | Thereof deficits | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Balance at 31.12.2023 | 118.8 | 539.0 | 227.3 | 15.8 | 466.4 | – | 1,367.3 | – | 1,367.3 | |||||||||
| Change in 2024 | –2.0 | –438.7 | –132.0 | –2.1 | –8.0 | – | –582.8 | |||||||||||
| Change from the intermediary business in 2024 | – | – | – | – | –441.2 | – | –441.2 | |||||||||||
| Balance at 31.12.2024 | 116.8 | 100.3 | 95.3 | 13.7 | 17.2 | – | 343.3 | – | 343.3 | |||||||||
| Change in 2025 | –79.1 | –249.9 | –134.0 | –5.9 | 0.9 | 1.2 | –466.8 | |||||||||||
| Change from the intermediary business in 2025 | – | – | – | – | 68.5 | 103.2 | 171.7 | |||||||||||
| Balance at 31.12.2025 | 37.7 | –149.6 | –38.7 | 7.8 | 86.6 | 104.4 | 48.2 | –188.3 | 236.5 | |||||||||
| Current portion | 8.8 | – | – | 4.6 | 28.8 | – | 42.2 | – | 42.2 | |||||||||
| Negative figures represent surpluses, and positive figures deficits. | ||||||||||||||||||
Volume- and tariff-related timing differences arise from the differences between the costs and income for a year and can be broken down as follows:
2025
| In millions of CHF | Total | Grid utilisation | General ancillary services/balancing energy | Active power losses (individual ancillary services) | Reactive energy (individual ancillary services) | Power reserve | Solidarised costs | Further activities | 2 | Eliminations | 3 | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Net turnover | 1,483.5 | 598.3 | 627.1 | 249.4 | 22.9 | 2.2 | – | – | –16.4 | |||||||||
| Other operating income | 27.2 | 2.4 | 0.3 | – | – | 0.1 | – | 24.4 | – | |||||||||
| Procurement costs | –462.6 | –7.1 | –346.3 | –109.8 | –15.8 | – | – | – | 16.4 | |||||||||
| Operating expenses1 | –295.7 | –236.5 | –31.3 | –4.1 | –0.7 | –2.4 | – | –20.7 | – | |||||||||
| Depreciation/amortisation and impairment losses | –168.0 | –158.6 | –4.9 | –0.7 | –0.1 | –0.4 | – | –3.3 | – | |||||||||
| Imputed interest and income taxes (EBIT) | –117.6 | –119.4 | 5.0 | –0.8 | –0.4 | –0.4 | –1.2 | –0.4 | – | |||||||||
| Change in volume- and tariff-related timing differences (excl. intermediary business) | 466.8 | 79.1 | 249.9 | 134.0 | 5.9 | –0.9 | –1.2 | – | – | |||||||||
| Net turnover from intermediary transactions | 136.6 | 136.6 | – | |||||||||||||||
| Procurement costs from the intermediary business | –308.3 | –205.1 | –103.2 | |||||||||||||||
| Change in volume- and tariff-related timing differences from the intermediary business | –171.7 | –68.5 | –103.2 | |||||||||||||||
| 1 For segment reporting, the costs of capitalised self-constructed assets are deducted from operating expenses and are therefore not included in total operating income. | ||||||||||||||||||
| 2 Congestion management is included in the other activities. | ||||||||||||||||||
| 3 Active power losses are a separate internal balance group. As a result, internal transactions occur between the general ancillary services/imbalance energy and active power loss segments. | ||||||||||||||||||
2024
| In millions of CHF | Total | Grid utilisation | General ancillary services/balance energy | Active power losses (individual ancillary services) | Reactive energy (individual ancillary services) | Power reserve | Further activities | 2 | Eliminations | 3 | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Net turnover | 1,825.1 | 550.7 | 930.7 | 323.5 | 17.3 | 17.5 | – | –14.6 | ||||||||
| Other operating income | 18.7 | 1.9 | 0.3 | – | – | 0.1 | 16.4 | – | ||||||||
| Procurement costs | –684.5 | –44.0 | –460.5 | –180.9 | –13.7 | – | – | 14.6 | ||||||||
| Operating expenses1 | –276.5 | –227.6 | –23.7 | –3.1 | –0.7 | –7.6 | –13.8 | – | ||||||||
| Depreciation/amortisation and impairment losses | –160.9 | –152.7 | –4.9 | –0.5 | –0.2 | –0.4 | –2.2 | – | ||||||||
| Imputed interest and income taxes (EBIT) | –139.1 | –126.3 | –3.2 | –7.0 | –0.6 | –1.6 | –0.4 | – | ||||||||
| Change in volume- and tariff-related timing differences (excl. intermediary business) | 582.8 | 2.0 | 438.7 | 132.0 | 2.1 | 8.0 | – | – | ||||||||
| Net turnover from intermediary transactions | 627.7 | 627.7 | ||||||||||||||
| Procurement costs from intermediary transactions | –186.5 | –186.5 | ||||||||||||||
| Change in volume- and tariff-related timing differences from the intermediary business | 441.2 | 441.2 | ||||||||||||||
| 1 For segment reporting, the costs of capitalised self-constructed assets are deducted from operating expenses and are therefore not included in total operating income. | ||||||||||||||||
| 2 Congestion management is included in the other activities. | ||||||||||||||||
| 3 Active power losses are a separate internal balance group. As a result, internal transactions occur between the general ancillary services/imbalance energy and active power loss segments. | ||||||||||||||||