South Korea Restructures Industrial Electricity Tariffs by Sector to Aid SMEs

The South Korean government is overhauling industrial electricity tariffs by sector, a reform the administration says could mostly benefit small and mid-sized firms, though large corporations may see a mixed mix of gains and costs. Officials with the Ministry of Climate, Energy and Environment say the change aims to better align prices with how different industries use power, and to help businesses manage energy costs more predictably.

Under the plan, the industrial electricity rate is expected to fall on average by about 1.7 won per kilowatt-hour, with some variations depending on usage patterns. For companies whose power consumption remains constant across the year, the reduction is projected to be around 1 won per kWh. The tariff system divides industrial customers into two categories based on supply contracts: those under 300 kW are classified as “Gap,” while larger users are “Eul.” The ministry estimates that about 97 percent of Eul customers, roughly 30,000 firms, will see lower charges.

Impact will vary by sector. Small and mid-sized enterprises that operate more during daytime hours could see larger savings—roughly 2.7 won per kWh—while large firms may gain about 1.1 won per kWh. Companies that run only during weekday business hours, from 9 a.m. to 6 p.m., could see even larger reductions, with analyses suggesting a 16 to 18 won per kWh decrease in some cases.

The government also announced temporary weekend discounts designed to boost electricity use during periods of high renewable output. If firms shift some activity to weekend daytime hours, the tariff benefits would be greater. In spring and fall, weekends and holidays from 11 a.m. to 2 p.m. will receive a 50 percent discount on industrial tariffs. The policy, intended to help absorb intermittent solar and wind output, will run through 2030, giving industries a five-year window to adjust.

In addition, firms can combine the tariff changes with the Plus Demand Response program, which pays companies to increase consumption during times of low demand. When used together with weekend discounts, the effective cost of electricity could fall to about 20–30 percent of weekday peak rates for participating customers.

But the reform could hurt sectors that cannot easily adjust operations. In particular, steel and cement producers, which rely on flexible scheduling to capitalize on cheaper night-time power, may see higher overall costs under the new structure. Beginning in the late afternoon through the early morning, off-peak rates would rise by about 5.1 won per kWh, potentially eroding some cost advantages that steelmakers have enjoyed by shifting production to late hours.

Industry executives have warned that the tariff rethink does not always align with sector realities. Steelmakers point to continuous operation needs and rising energy prices in recent years, including several increases since 2021, as well as stiff competition from cheaper overseas steel. They also note that future processes such as hydrogen-reduced steel will demand substantial electricity, making a stable, industry-sensitive tariff framework crucial for long-term competitiveness.

Petrochemical producers, many with 24-hour operations, could see mixed outcomes. Some facilities can adjust to daytime or weekend schedules, but others operate around the clock, limiting the potential savings from tariff shifts. The semiconductor sector, likewise, faces constraints: 24/7 production lines and climate-controlled clean rooms mean halting production to dodge peak hours is often impractical, limiting the immediate benefits from the redesign.

Samsung Electronics is cited as a key example of Korea’s electricity intensity. The company was the nation’s top industrial electricity user in 2024, with power consumption in its Device Solutions unit rising from 2022 through 2024. Even a 1 won per kWh rise could cost Samsung roughly 29 billion won annually given current consumption, underscoring the policy’s potential impact on Korea’s largest exporters and, by extension, U.S.-Korea trade and supply chains.

The government said it would allow deferral requests from industries that need more time to adjust, with a deadline set for September 30. If regional electricity pricing is introduced later this year, officials say it could offset some losses from sector-wide changes. Officials also suggested the broader aim of the reform is to enable more effective use of renewable energy and to respond to output-control needs during spring and autumn, while pursuing regional pricing to ease transmission costs and support balanced regional growth.

For U.S. readers, the policy matters because Korea’s manufacturing backbone—semiconductors, automobiles, steel, and chemicals—drives significant global supply chains. Changes in Korea’s energy costs and their sensitivity to industry characteristics could influence export prices, factor into decisions by multinational suppliers and investors, and affect the cost structure of electronics and other energy-intensive products that flow into American markets. Monitoring how Korea calibrates sector-specific tariffs, DR participation, and regional price signals will be important for assessing potential ripple effects on global markets and U.S.–Korea economic relations.