South Korea’s two largest chipmakers have said no to a bill they were asked to pay years in advance. Samsung Electronics and SK Hynix rejected a proposal from state utility KEPCO to prepay a combined 25 trillion won, about $18.7 billion, for electricity, according to a Reuters report on September 14 citing documents filed by the office of lawmaker Lee Chul-gyu.
The split is uneven. Samsung would account for roughly 20 trillion won of the total and SK Hynix about 5 trillion won. The amount works out to roughly five years of power costs, and KEPCO wanted the money to build out the national grid ahead of schedule, including transmission lines and substations for the Yongin semiconductor cluster.
The companies reviewed the request and declined. Their stated reason is that long-term demand for semiconductors is uncertain, and that handing over a lump sum of that size at once is difficult. The decision puts the two chipmakers and the state utility on opposite sides of a question about who should pay for the electricity infrastructure the AI boom requires.
KEPCO had its own reasons for asking. The utility hoped the prepayments would let it borrow less as it finances a grid expansion driven by data centers and chip fabrication. Without the money, KEPCO will have to find other financing, which likely means more debt issuance.
The two companies are the backbone of the global memory industry. Samsung and SK Hynix together produce the large majority of the DRAM and NAND the world’s data centers rely on. Their power demand is enormous, and it is concentrated in a handful of sites that the national grid was not originally designed to serve at this scale.
The dispute is a concrete version of a problem many countries are now facing. AI infrastructure consumes power at a scale that requires new generation and transmission, and the question of who pays upfront is unresolved. South Korea, home to the world’s two dominant memory makers, feels the pressure earlier and harder than most.
The prepayment request reflects a deeper strain. Data centers and chip fabs are being built faster than the grid can support them, and South Korea is not alone in the mismatch. The same week, Moody’s estimated the United States alone will need about 45 gigawatts of new generation by 2030, at a cost of roughly $110 billion. The bill for the AI boom is landing on utilities everywhere.
Samsung and SK Hynix are themselves spending heavily. Both are in the middle of a memory upcycle, with inventories at some points running below ten days of supply. Their reluctance to prepay is not a sign of weakness but of caution: committing to five years of electricity costs assumes demand stays at today’s heights.
KEPCO’s ask also reveals how the financing of that boom is unresolved. Utilities are being asked to build infrastructure for customers whose demand could change, while those customers are being asked to lock in costs years ahead. Neither side wants to carry the risk, and the standoff between Korea’s chipmakers and its utility is a preview of negotiations happening, more quietly, in other countries.
The Yongin cluster is central to the argument. The site is planned to be one of the world’s largest semiconductor manufacturing complexes, and it will need transmission and substation capacity before the fabs come online. KEPCO’s position is that the companies that will consume the power should help fund the grid that delivers it.
The companies’ position is that that is the utility’s job. Prepaying shifts financing risk from the utility to its largest customers at a moment when the semiconductor cycle, though strong, has shown it can turn. Analysts said the standoff is a sign that the costs of the AI buildout are beginning to land on balance sheets in ways companies did not fully anticipate.
The timing is awkward. The refusal comes the same day a global selloff in AI-linked shares, led by memory makers, showed how quickly sentiment can shift. Samsung and SK Hynix are the very companies whose fortunes the market is now reexamining. Paying five years of power bills upfront would compound the risk at exactly the wrong moment.
The refusal is also a signal about confidence. Samsung and SK Hynix are riding a strong memory cycle, and their reluctance to prepay suggests their own planners see risk beyond the current quarter. If the companies that stand to gain the most from AI demand are unwilling to prepay for five years of power, it says something about how durable they expect that demand to be.
KEPCO’s alternative is not attractive. More borrowing at a time when interest costs are already heavy would strain the utility’s own finances. The government, which effectively controls KEPCO, may end up brokering a compromise that spreads the cost differently, but no such plan has been announced.
The episode reveals the friction underneath the AI boom’s headline growth. Chips and data centers are abundant in the narrative; the power grid that makes them run is not. Somebody has to build it, and Samsung and SK Hynix have made clear they do not intend to be the ones paying years ahead of time.
