South Korea Overhauls Industrial Electricity Tariffs to Shift Demand Toward Daytime
South Korea’s climate and energy ministry, together with Korea Electric Power Corporation (KEPCO), unveiled a plan to revise industrial electricity tariffs to reflect a shift toward renewable power. The proposal, which has cleared the Electricity Committee, would apply to roughly 38,000 companies and is designed to encourage daytime consumption when renewable output is higher and fossil-fuel generation is lower.
Under the proposed changes, weekday electricity charges would vary by time of day. The daytime period from 9:00 a.m. to 3:00 p.m. would be lowered to a mid-tier rate. In the late afternoon and early evening, from 6:00 p.m. to 9:00 p.m., charges would move from the mid-tier to the highest tier.
The plan also stipulates changes to the actual price levels. The lowest rate, historically used at night, would rise by 5.1 won per kilowatt-hour. The highest rate, meanwhile, would fall depending on season: by 16.9 won per kWh in summer and winter, or by 13.2 won per kWh in spring and fall.
In addition, the proposal offers a 50% discount on the 11:00 a.m. to 2:00 p.m. window on weekends and public holidays during the spring (March–May) and autumn (September–October) seasons, when power output from solar and other renewables is often plentiful and grid stress can occur.
For industrial customers using around 300 kW, the plan would keep 8:00 a.m. to 11:00 a.m. charges unchanged, lower the rates from 11:00 a.m. to 6:00 p.m., and raise costs again from 6:00 p.m. to 8:00 a.m. the next day. The overall intent is to shift periods of high demand toward times when the grid can shoulder it more readily.
The changes are slated to take effect on the 16th of the following month, with a grace period available until September 30 for those applying to delay implementation. Officials say the policy will reduce the burden on industry, with about 97% of affected firms—roughly 38,000 companies—expected to see lower bills, particularly small and medium-sized enterprises that operate more during daytime hours.
Why this matters beyond Korea: the move reflects how energy policy is increasingly using price signals to align industrial demand with renewable supply, a topic of growing interest for U.S. policymakers and manufacturers. Time-of-use and demand-response approaches can influence operating costs for energy-intensive U.S. suppliers, affect global supply chains, and inform how other countries structure tariffs to encourage cleaner power while safeguarding industrial competitiveness. As Korean firms adjust to higher daytime solar output and lower fossil-fuel use, the policy offers a concrete example of leveraging pricing to support grid reliability, decarbonization, and industrial resilience—issues central to energy security and manufacturing in the United States.