Samsung and SK Hynix Say No to KEPCO’s 25 Trillion Won Prepay Plan

South Korea’s two semiconductor giants have turned down a proposal from the state electricity monopoly to pay five years of power bills in advance — a combined 25 trillion won (about $18.5 billion USD) — leaving KEPCO (Korea Electric Power Corporation, the state-owned utility that supplies virtually all of South Korea’s grid electricity) to find other ways to plug its debt.

What happened

KEPCO approached Samsung Electronics and SK hynix — the country’s two largest industrial electricity consumers — with a proposal for a prepayment deal: the chipmakers would pay roughly 25 trillion won upfront, covering approximately five years of future electricity costs, in exchange for terms not publicly detailed. Both companies declined. KEPCO confirmed the outcome on Monday, September 14, 2026. No alternative arrangement has been announced.

Why Korea does it this way

KEPCO is a government-majority-owned listed company that buys power from generators and resells it to consumers at regulated tariffs. For years those tariffs were kept below the cost of generation — partly as industrial policy to keep Korean manufacturers competitive — leaving KEPCO with accumulated debt now estimated in the tens of trillions of won. Prepayment deals, sometimes called seon-납 arrangements, are an unconventional tool KEPCO has floated to improve its balance sheet without raising retail electricity tariffs, which require government approval. Samsung and SK hynix together consume a significant share of Korea’s total industrial electricity, making them obvious targets for any such proposal.

What it means for you

Semiconductor investors: Samsung Electronics (KRX: 005930) and SK hynix (KRX: 000660) are the first and second largest components by weight in the KOSPI index (Korea Composite Stock Price Index, the main Korean equity benchmark). Rejecting the deal preserves approximately 12.5 trillion won of cash on each company’s balance sheet that would otherwise have been locked up — a positive for near-term liquidity. No impact on HBM (High Bandwidth Memory, the high-density memory stacked directly next to AI accelerators in data-center GPUs) production schedules has been reported.

KEPCO investors: KEPCO (KRX: 015760) still carries its structural debt load. The failure of this proposal means no short-term cash injection from its largest industrial customers; watch for a tariff revision announcement or a government capital injection instead.

Residents and businesses on Korean electricity tariffs: Retail electricity prices in Korea are set by the government and have been rising incrementally to reduce KEPCO’s losses. This deal’s collapse does not immediately change your bill, but it increases pressure on the government to approve further tariff increases — the Ministry of Trade, Industry and Energy (MOTIE) sets the schedule. Check the current approved tariff level at kepco.co.kr.

Data-center and AI supply chain: SK hynix is the leading supplier of HBM3E chips used in Nvidia’s current GPU generation; Samsung is working to qualify its own HBM for major customers. Neither company’s power supply or chip-production capacity appears affected by this decision.

Watch next

• KEPCO’s next quarterly earnings disclosure (date not yet set — scheduled by KEPCO IR; typically within 45 days of quarter-end): watch for any revision to its debt-reduction roadmap or announcement of an alternative financing measure.
• MOTIE electricity tariff review: the government reviews industrial and household tariffs periodically; if KEPCO’s shortfall widens, a tariff hike above the current approved level becomes more likely — trigger: any MOTIE press release announcing a rate decision.
• Samsung HBM qualification update: Samsung has stated it is working to pass Nvidia’s HBM quality tests; watch for an official Nvidia or Samsung announcement confirming volume qualification — that event would shift the HBM supply balance between the two Korean chipmakers.

Source: KBS World Radio