South Korea has decided that the answer to its data centre power problem is geography. On 26 August 2026, the Ministry of Climate, Energy and Environment and the state utility Korea Electric Power Corp (KEPCO) presented the design of the country's first regional industrial electricity pricing system at a public hearing. The framework divides the country into zones and gives the deepest discounts to users in the south, where most nuclear and renewable generation sits, according to a report by Tech Times. Developers of AI data centres in the south could receive a cut worth up to 18 won per kWh, roughly 10 per cent off the national industrial average of 181.9 won per kWh.
The reform arrives as the Strait of Hormuz disruption has raised the cost of the liquefied natural gas (LNG) that sets Korea's wholesale power price in most hours.
Why the capital region is full
Greater Seoul draws about 40 per cent of its industrial electricity from outside the region, a KEPCO official said at the hearing, which drives up the cost of long-distance transmission. Data centre vacancy in Seoul has fallen to 1.1 per cent, and larger facilities must pass a power grid impact assessment that now adds two to three years to approvals. More than 55 per cent of KEPCO's transmission projects were delayed as of late 2025, according to the report.
The south has the opposite problem. The Honam region accounted for 32 per cent of Korea's renewable generation in 2025, but much of that output faces curtailment because north-south transmission cannot move it to Seoul at scale. A regional tariff is meant to move consumption to where the power already is, rather than waiting years for new lines.
Under the proposed map, rates in southern Seoul and southern Gyeonggi, home to the core semiconductor cluster, would fall by only around 1 won per kWh. Northern Seoul, Incheon and northern Gyeonggi would see cuts of 6 to 10 won, and Gangwon, Daejeon, Chungcheong and Sejong cuts of 10 to 15 won, with the largest reductions further south.
The government flagged the change in early August. Climate Minister Kim Sung-hwan said the regional differential rate system "that takes transmission costs into account" would be implemented in the second half of the year after the public hearing, with the size of cuts set "at a level that the Korea Electric Power Corporation can bear," Seoul Economic Daily reported. A dedicated rate plan for large AI data centres is also due within the year.
The LNG option that was dropped
Korea had considered a more direct route. The AI Data Centre Special Act, which cleared the National Assembly's legislation committee on 6 May 2026, designates AI data centres as national strategic facilities and supports site selection, permits and power supply. An earlier version included an exemption allowing data centres built outside the Seoul region to sign direct power purchase agreements with LNG-fired generators.
The Ministry of Climate and Energy opposed that clause, arguing that tying gas plants to specific data centres could burden the national grid and conflict with the principle of regional production and consumption. It was removed. The Deputy Prime Minister and Science Minister, Bae Kyung-hoon, told lawmakers that the 260,000 GPUs the government has planned would require about 500 MW, and that total demand including domestic and foreign companies could exceed 5 GW, but that ministries had agreed the current supply outlook could support it. "We have determined that supply will be sufficient under the current power conditions until 2030," he said.
Where Hormuz comes in
Korea's wholesale power price, the system marginal price, is set by LNG-fired generation most of the time. An analysis published by the newsletter Energy Korea in March, citing Korea Power Exchange statistics, said LNG plants set the marginal price 88.7 per cent of the time as of February 2025. It noted that Korea Gas Corporation holds long-term contract volumes with Qatar that transit the Strait of Hormuz, and that replacement spot cargoes from the US and Australia were available but expensive.
The price impact arrives with a lag. The landed cost of LNG feeds into Korean fuel cost calculations four to six months after spot purchases, meaning the cargoes bought at crisis prices in March and April were due to reach the wholesale market in the third quarter. The International Energy Agency (IEA) says spot LNG prices in Asia averaged USD 17.5 per million British thermal units in the second quarter of 2026, up 45 per cent year on year.
That puts pressure on KEPCO, which has already raised industrial tariffs repeatedly since 2022 while holding residential tariffs flat. Industrial prices rose from 105.5 won per kWh in 2021 to 181.9 won per kWh by the end of 2025, about 80 per cent in four years, according to the Energy Korea analysis. KEPCO's total debt exceeds 200 trillion won.
Two policies pulling in different directions
The regional tariff and the Hormuz shock push in different directions. The tariff lowers costs for data centres that move south. Higher LNG costs raise the wholesale price everywhere, and KEPCO's finances limit how much of a discount it can afford. The minister's caveat that cuts must stay at a level KEPCO can bear reflects that constraint.
For data centre developers, the south now offers lower tariffs, more available grid capacity and proximity to nuclear and renewable generation that does not depend on imported gas. The trade-off is distance from customers and fibre hubs in the capital region, and the need for new network links.
The government's broader energy plan will settle some of these questions. A draft of the 12th Basic Plan for Electricity Supply and Demand is scheduled for October, and the climate ministry is reviewing permits for an LNG combined-cycle plant within the southwestern semiconductor complex.
What to watch
The first marker is the final rate design and its start date, which the government has said will come in the second half of 2026. The second is the dedicated AI data centre tariff. The third is whether KEPCO raises industrial tariffs again as Hormuz-era LNG costs reach the wholesale market. If it does, the southern discount will be measured against a higher base, and the case for moving data centres away from gas-heavy supply will only grow.