South Korea Overhauls Industrial Electricity Tariffs, First Since 1977, to Boost Renewables Integration

South Korea’s Ministry of Climate, Energy and Environment and Korea Electric Power Corp. (KEPCO) unveiled a revised seasonal and time-of-day electricity tariff for industrial users, following review by the Electricity Committee. The plan represents the first major overhaul of the industrial tariff structure since 1977, reflecting a shift toward more renewable energy.

The reform aims to align pricing with the changing energy mix, encouraging consumption when solar and wind output is high and overall supply is more plentiful. Officials say the update addresses the growing role of renewables in Korea’s power generation and the need to better match demand with available supply.

Under the proposal, spring, summer and autumn high-cost periods will shift. The hours that currently incur the highest tariffs—11 a.m. to noon and 1–3 p.m.—will move to the middle of the load spectrum, while the 6–9 p.m. window will become the highest-load period.

The top-tier peak price will be 16.9 won per kWh in summer and winter, and 13.2 won per kWh in spring and autumn. The lowest rate, charged during off-peak periods, will be 5.1 won per kWh, up from the current level.

In addition, Officials announced a temporary discount on weekends and public holidays during spring (March–May) and autumn (September–October). From 11 a.m. to 2 p.m. on those days, tariffs will be halved for five years, through December 31, 2030, to incentivize consumption when renewable generation is typically higher.

Why this matters beyond Korea: for U.S. readers, the changes illustrate how a major Asian economy is pursuing demand-side management to integrate more renewables, potentially stabilizing grid reliability while controlling costs for large manufacturers and tech exporters. Time-of-use pricing can influence production planning for Korea-based components and electronics, with potential implications for global supply chains and pricing in related sectors.

Context for non-Korean readers: the policy comes from Korea’s central planning bodies and KEPCO, the country’s dominant power utility, and it follows a long-standing approach that historically kept coal-fired plants operating with relatively flat output. The move toward seasonal and time-of-day differentiation reflects broader efforts to decarbonize and modernize the grid as renewable capacity expands.