Samsung, SK Hynix Reject KEPCO's $18 Billion Power Prepayment

Korea Electric Power Corp. asked Samsung Electronics and SK Hynix to prepay a combined 25 trillion won, about $18 billion, in electricity charges covering roughly five years of consumption, and both chipmakers told the utility no, according to the Korea Times and Seoul Economic Daily, both reporting the rejection Monday.

The ask itself is the more interesting number. KEPCO wanted 20 trillion won, roughly $14.8 billion, from Samsung and 5 trillion won, about $3.7 billion, from SK Hynix, with the principal and interest to be deducted from future bills every six months, TrendForce reported on Sept. 3. The money was earmarked for the national backbone grid and for transmission and substation work around the Yongin semiconductor cluster south of Seoul, where Samsung is building its next fabs, and the Honam region in the southwest, where SK Hynix's cluster needs roughly 6.3 gigawatts of capacity, with 3 gigawatts targeted by 2029.

Why the ask landed the way it did

KEPCO's own disclosed numbers explain the urgency better than the request does. The utility carried 210.7 trillion won in total debt as of the end of June, and its daily interest expense ran to about 11.5 billion won, both companies were told, per TrendForce and Seoul Economic Daily's reporting. Run that daily figure out for a year and interest alone would consume roughly 4.2 trillion won, a sum within shouting distance of SK Hynix's entire five-year ask on its own. KEPCO is not proposing a discount for early payment out of generosity; it is trying to convert two large corporate customers into a source of financing a bond market has grown reluctant to extend on the same terms.

That reluctance has a specific mechanism behind it. A government waiver lets KEPCO issue bonds up to five times its capital and reserves rather than the usual two times, and that waiver expires at the end of 2027. Every additional year of AI-driven grid buildout between now and then has to be financed either through that widened bond ceiling or through something else, and prepaid electricity bills from Samsung and SK Hynix were the something else.

Samsung and SK Hynix's actual objection

Neither company rejected the idea of paying KEPCO more; they rejected paying five years of it at once. Both companies determined, after internal review, that tying up that much cash was too heavy a commitment given uncertainty over whether the current AI-driven semiconductor boom holds for half a decade, the Korea Times reported. That is a memory-market argument as much as a power-market one: Samsung and SK Hynix are the same two companies whose combined DRAM inventory fell below ten days of supply in the first week of September, an unrelated but simultaneous signal that neither one is short of demand right now. The reluctance was about locking in an assumption about 2031, not about affording 2026.

The rate KEPCO offered widened the gap further. The utility wanted an interest rate pegged to the two-year government bond yield plus 15 basis points, putting the deal in the mid-3 percent range; Samsung and SK Hynix pushed for something closer to the roughly 3.7 percent yield on KEPCO's own two-year bonds, a KEPCO official told Seoul Economic Daily, adding: "It is true that Samsung Electronics and SK hynix communicated their refusal of our proposal." A few tenths of a percentage point on $18 billion is not a rounding error; it is worth on the order of tens of millions of dollars a year in either direction.

What actually gets built without the cash

The practical question is whether Yongin and Honam slow down. KEPCO's target capacity for Honam, 3 gigawatts by 2029 against an eventual 6.3-gigawatt build-out, was set assuming a funding path that no longer includes a prepayment from its two largest industrial customers. The utility now has three options: lean harder on the bond ceiling before it reverts in 2028, raise electricity rates broadly (which pulls the cost of AI-driven demand back onto ordinary ratepayers, the dynamic already drawing scrutiny in the United States around hyperscaler power demand), or negotiate a smaller, shorter prepayment that both chipmakers can accept without betting on the 2031 semiconductor cycle.

Party	Amount requested	Term	Status
Samsung Electronics	20 trillion won (~$14.8B)	5-year prepayment	Rejected
SK Hynix	5 trillion won (~$3.7B)	5-year prepayment	Rejected
Combined ask	25 trillion won (~$18B)	5-year prepayment	Rejected
KEPCO total debt	210.7 trillion won	as of end of June 2026	Outstanding

Samsung's Pyeongtaek campus, pictured above, is a separate site from the Yongin cluster this dispute is actually about, but it is the same company weighing the same question at every location: how much of its own balance sheet to commit to a grid that a state utility can no longer fully finance on its own. That is the throughline connecting a Korean bond dispute to the equity stakes Nvidia has been taking directly in its AI infrastructure customers rather than waiting for utilities and governments to build the capacity first.

The number that would change this

If KEPCO's bond-issuance waiver gets extended past 2027, the urgency behind this specific prepayment ask mostly evaporates, and the utility can return to financing grid expansion the way it always has. Watch the Korean National Assembly's budget session this winter for exactly that extension. Absent it, expect KEPCO back at Samsung and SK Hynix's door with a shorter, cheaper version of the same request, the kind neither company has actually said it would refuse.

The broader pattern, playing out from Korea to the floating nuclear reactors startups are raising seed rounds to build, is that the grid operators funding AI's power draw are running out of conventional balance sheet before the chipmakers run out of demand for electricity.