On 2 September 2026, the Federal Council approved the annual report and annual financial statements of the Decommissioning Fund and the Waste Disposal Fund (STENFO). The two funds hold CHF 9.998 billion (2024: CHF 9.652 billion). They are financed by the operators of nuclear installations and cover the costs of decommissioning nuclear power plants and disposing of the radioactive waste arising after nuclear power plants are taken out of service.
In 2025, investment markets achieved predominantly positive returns. STENFO benefited from this and, for the third consecutive year, recorded a surplus in both funds compared with the defined target value.
Waste Disposal Fund for Nuclear Power Plants
At the end of 2025, the fund’s accumulated capital amounted to CHF 6.964 billion (2024: CHF 6.665 billion). Compared with the target amount of CHF 5.902 billion (based on the expected decommissioning and disposal costs, which are recalculated every five years in a cost study), this resulted in a surplus of CHF 1.062 billion at the end of 2025 (2024: surplus of CHF 860 million).
Decommissioning Fund for Nuclear Installations
This fund ensures the financing of the costs of decommissioning and dismantling nuclear installations as well as disposing of radioactive waste. At the end of 2025, the fund’s accumulated capital amounted to CHF 3.034 billion (2024: CHF 2.987 billion). Compared with the target amount of CHF 2.762 billion (based on the expected decommissioning and disposal costs, which are recalculated every five years in a cost study), this resulted in a surplus of CHF 272 million at the end of 2025 (2024: surplus of CHF 211 million).