Owing to the inadequately known and developed deep sub-surface of Switzerland, the legislature has identified the high exploration risk for geothermal resources as a major technical barrier for development. In order to offset the financial implication of the high exploration risk inherent in geothermal power projects of Switzerland, up to 60% of the total sunk subsurface development cost of prospecting, finding and testing the resource may be reimbursed. Financing comes from a small portion (CHF 0.001 per kWh) of the grid surcharge (CHF 0.023 per kWh). (See reference below for more details.) IEA/IRENA Global Renewable Energy Policies and Measures Database © OECD/IEA and IRENA, [November 2020]