Samsung and SK hynix reject KEPCO plan to prepay about $18B in power bills, Yonhap reports

South Korea’s two big memory chipmakers, Samsung Electronics and SK hynix, told state utility KEPCO they will not prepay about five years of electricity bills — roughly 20 trillion won (~$14.8B) from Samsung and 5 trillion won (~$3.7B) from SK hynix — industry sources told Yonhap and Seoul Economic Daily. The money was meant to help fund transmission for semiconductor clusters and AI data centers; the firms cited uncertainty over how long the AI chip boom lasts.

The AI buildout needs electricity as much as chips — Korea’s top two memory makers just refused to pre-fund the grid with ~$18B of their own cash because they won’t bet five years of bills on the boom lasting. Separate from the weekend pace-the-frontier share plunge: power-and-money desk signal on AI infrastructure risk.

Yonhap’s Kim Han-joo and Seoul Economic Daily’s Lee Jung-hoon reported that Samsung Electronics and SK hynix rejected a plan from state-run Korea Electric Power Corp. (KEPCO) — South Korea’s main electric utility — to prepay five years of electricity bills. Prepay here means paying years of bills up front, so the utility can spend that cash now. Yonhap cited industry sources; Seoul Economic Daily cited business sources. Neither paper printed a Samsung or SK hynix press release for the refusal. That sourced rejection is the filing event.

The sums, as the two papers report them, match about five years of last year’s bills: about 20 trillion won from Samsung — Yonhap’s dollar line is about $14.8 billion — and about 5 trillion won from SK hynix. Seoul Economic Daily puts the combined ask at about 25 trillion won, or about $18 billion. Won is South Korea’s currency. File those as Yonhap’s and Seoul Economic Daily’s figures — not this desk’s conversion.

Yonhap says the firms are seen as worried about locking up that cash while it is uncertain whether the semiconductor industry’s current artificial-intelligence boom will last. Seoul Economic Daily says they told KEPCO they would find it difficult to take part. File that as the papers’ attributed read. This desk is not saying AI demand is collapsing, and it is not saying any fab was cancelled.

What the money was for: Yonhap says the prepay could have helped expand power infrastructure for semiconductor clusters under construction in Yongin, just south of Seoul, and in the southwestern Honam region. Seoul Economic Daily says KEPCO wanted the cash to build national backbone power networks — the long-distance lines and substations — for those two clusters and for AI data centers.

Seoul Economic Daily only: KEPCO said it had not proposed a prepay to any companies other than the two chipmakers. The paper cites LS Securities’ estimate that the three megaprojects need about 39.7 gigawatts in all — 15 GW for the Yongin cluster, 18.4 GW for AI data centers, and 6.3 GW for Honam. Those are SED/LS figures, not this desk’s math.

Yonhap’s snapshot of the utility: as of the end of June, KEPCO’s total debt stood at 210.7 trillion won, with daily interest expenses of about 11.5 billion won.

One-sentence context: Monday’s Asia chip-stock prints and the weekend “pace the frontier” market read are already filed as asia-chips-plunge-ai-slowdown and ai-slowdown-chip-stocks-bloomberg. A 3 Sep Reuters write-up of KEPCO’s earlier proposal is backlog only — not today’s refusal. This filing is the sourced no.

REPORTED here: Yonhap and Seoul Economic Daily — two originating newsrooms. The Korea Herald ran a same-day Yonhap reprint; that is not a third newsroom. NOT claimed: a Samsung or SK hynix primary press release for the refusal, cancelled fabs, collapsing AI demand, or investment advice from this desk.