Weighted average cost of capital (WACC) – imputed interest rate

The imputed interest rates for renewable energy support instruments in 2026 are as follows:

  • Market premiums for large-scale hydropower valid for funding applications in 2024: 4.28% (previous year: 5.10%)
  • Investment contributions for funding applications in 2025:
    Hydropower: 4.28% (previous year: 5.10%)
    Biomass: 4.28% (previous year: 5.10%)
    Geothermal: 4.63% (previous year: 5.45%)
    General photovoltaic systems: 3.75% (previous year: 4.58%)
    Large-scale alpine photovoltaic plants: 4.28% (previous year: 5.10%)
    Wind turbines: 4.45% (previous year: 5.28%)

Documents

Explanatory material

Swiss Economics studies

IFBC studies

Specialist staff
Last modification 02.03.2026

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