Profit is back, but tariffs still rule
- KEPCO returned to strong profit in 2025, with net profit of Won 8,667 billion after Won 3,622 billion in 2024.
- The main business is simple: buy or generate power, then sell electricity across Korea under regulated tariffs.
- Lower fuel pressure and more nuclear output are expected to help margins, though nuclear generation hit maintenance snags in early 2026.
- Demand is soft where it matters most, with industrial electricity use falling further by 0.6% in the first half of 2026.
- The next big swing factor is tariff reform, with a regionally differentiated tariff system targeted for the end of 2026.
A repair story with a regulator
KEPCO is in a financial repair phase, aiming for KRW30 trillion in improvements by 2026. The company has already made real progress. In 2025, sales were Won 96,568 billion and net profit was Won 8,667 billion, up from Won 3,622 billion in 2024.
The bull case depends on a regional differentiated retail tariff system, targeted for introduction by the end of 2026, and a resumption of nuclear power capacity growth. Nuclear output lowers the blended cost of power, though prolonged maintenance hurt generation numbers in the first half of 2026.
The bear case is tied to KEPCO's inability to set prices alone. Management has noted limited room for more industrial tariff hikes. Meanwhile, industrial demand remains weak, with first half 2026 power sales volume falling 0.6% year over year to 266.7 terawatt hours.
A new headwind is the capital required for national grid expansion and mega projects. KEPCO faces a regulatory mandate to reduce its bond issuance cap to twice its capital by the end of 2027, creating tension between the need to invest and the need to manage debt.
Power sales under state-set prices
KEPCO is an integrated electric utility. It transmits and distributes substantially all electricity in Korea. It also owns six generation subsidiaries, including Korea Hydro and Nuclear Power, which runs nuclear and hydro assets.
The company makes most of its money by selling electricity to homes, businesses, factories, and other users. It gets power from its own subsidiaries and from independent power producers. In 2025, KEPCO sold 549,417 gigawatt-hours of electricity to customers.
The model breaks when costs rise faster than tariffs. Most fuel other than anthracite coal is imported, so coal, LNG, and currency moves matter. KEPCO has a cost pass-through tariff system, but the filing says it has built-in limits and is subject to government discretion.
The Korean government also matters as an owner. As of the end of 2025, the government and Korea Development Bank together owned 51.1% of KEPCO's common shares. That gives policy goals a direct role in pricing, dividends, and capital decisions.
The power mix that drives costs
Retail electricity sales
This is the core revenue stream. KEPCO sells power across Korea under tariffs approved by the government.
Transmission and distribution
KEPCO handles substantially all power transmission and distribution in Korea. This makes it central to the grid, but also tightly regulated.
Nuclear generation
Nuclear output is a key margin lever. Management expects contribution to rise in the second half of 2026 with new additions like Saeul Unit 3, despite earlier maintenance delays.
Coal generation
Coal remains a major part of the generation base, but management expects its contribution to decrease in 2026. It also brings fuel and emissions cost risk.
LNG generation
LNG helps balance the system, but it exposes KEPCO to imported fuel prices and foreign exchange. Management expects LNG contribution to stay largely flat in 2026.
Overseas and new energy businesses
KEPCO has other income sources, including overseas business. Interest in the U.S. nuclear market could become an upside option, but it is not the main profit driver today.
Electricity demand by customer use
The mix is based on 2025 electricity sales volume from KEPCO's latest Form 20-F. Shares use gigawatt-hour volumes because the filing gives demand by usage, not a revenue percentage.
What could set back the repair
Fuel and currency shock
High impact · Medium oddsKEPCO buys most generation fuel from outside Korea, and prices are often tied to foreign currencies. The fuel cost to sales ratio improved to 20.1% in 2025 from 24.3% in 2024, but that benefit can reverse if LNG, coal, or the won move the wrong way.
Tariff reform stalls
High impact · High oddsKEPCO needs tariffs that better match its costs. Management has said there is limited room for more industrial tariff increases, so the next lever is a regionally differentiated tariff system. If the government delays or waters down reform, profit repair could slow.
Industrial demand keeps falling
Medium impact · High oddsFactories are the largest demand group. Industrial electricity sales volumes fell 0.6% year over year in the first half of 2026 to 266.7 terawatt hours, due to a broader economic downturn. A deeper industrial slowdown would further pressure sales volume.
Grid spending against debt limits
High impact · Medium oddsKEPCO faces significant capital expenditure requirements for national mega projects and grid expansion. At the same time, the company is under a regulatory mandate to reduce its bond issuance cap to twice its capital by the end of 2027.
Large customers bypass KEPCO
Medium impact · Medium oddsA new risk is direct power purchasing by large corporate users. Management cited LG Chem's Yeosu plant as an example of a customer buying directly from the power exchange. That removes the customer from KEPCO sales and cost of sales.
Nuclear output misses the plan
Medium impact · Medium oddsThe 2026 margin case depends on more nuclear generation, aided by the addition of Saeul Unit 3 in the second half. However, prolonged preventive maintenance hurt capacity factors in the first half of 2026. Outages or delays force more reliance on higher-cost power sources.
In one breath
Why did KEPCO become profitable again?
Fuel costs eased, prior tariff hikes helped, and the generation mix improved. KEPCO reported Won 8,667 billion of net profit in 2025, up from Won 3,622 billion in 2024.
Does KEPCO control its own electricity prices?
No. Electricity rates are regulated by the Korean government. That protects customers, but it can hurt KEPCO when fuel or purchased power costs rise faster than tariffs.
Why does nuclear power matter so much for KEPCO?
Nuclear power can lower the average cost of electricity generation because it is less exposed to imported fossil fuel prices. Management expects nuclear contribution to increase in the second half of 2026.
What is the biggest risk for KEP investors?
The biggest risk is that costs rise or demand weakens while tariff reform does not keep up. KEPCO's recovery depends on government pricing choices as much as on company execution.
Sources and research notes
This page combines Finn's company research with public filings and other cited materials. The thesis is reviewed when material company information changes; Finn Scores use the latest available scoring data.
- Thesis reviewed
- August 30, 2026
- Score data
- September 27, 2026
- Reviewed by
- Shivam Bharuka
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