On 6 December 2022, the Slovak parliament approved a law for the introduction of a windfall tax on electricity companies. The windfall tax applies the period from 1 December 2022 to 31 December 2024 with an installed capacity exceeding 0.9 megawatts, as well as by energy suppliers. The windfall tax applies at a rate of 90% on the price per megawatt hour exceeding a specified range of EUR 50 to EUR 250 per megawatt hour.

Electricity producers using hydropower or biomass are exempt from windfall tax.