Why KEPCO Asked Chipmakers to Prepay $18bn in Electricity—and What 19 Trillion Won Really Means

Most households have never been asked to pay five years of electricity bills in advance. For energy-intensive semiconductor factories, however, such a financing proposal was reported. The headline contains two big numbers—25 trillion and 19 trillion won—that describe different problems.

Reports by Maeil Shinmun and Segye Ilbo say KEPCO proposed advance payments equivalent to five years of bills—around 20 trillion won from Samsung Electronics and 5 trillion from SK Hynix. The suggested structure included interest and future bill offsets. Both companies declined, according to the reports. This was a financing proposal, not a mandatory new electricity charge.

The attention comes from a collision of timelines: new transmission lines and substations are needed for AI data centers and chip factories, while KEPCO's temporary higher bond-issuance ceiling expires at the end of 2027. With a prepayment proposal not accepted, discussion of other financing sources—including tariffs—has intensified.

A Korean community post on the morning of October 24 circulated the news of the rejected proposal and possible rate discussions. KEPCO president Kim Dong-cheol had said at an October 19 parliamentary hearing that a modest tariff increase should be discussed with the government to fund investment. A forum share and a discussion request do not constitute an adopted price change.

KEPCO's grid plan reportedly calls for 72.8 trillion won of transmission and substation investment through 2038. Possible responses include extending bond-cap exceptions, raising capital, borrowing or adjusting tariffs. Each distributes cost and risk differently; no single option has been adopted by this news alone.

Citing National Assembly Budget Office analysis, reports place KEPCO's projected end-2027 capital and reserves at 28.4177 trillion won. With the bond multiplier reverting from five to two, the ceiling would be 56.8354 trillion won, against projected outstanding bonds of 76.0489 trillion. The resulting gap of about 19.2135 trillion won is a forecast of excess bond capacity—not an immediate cash repayment demand or a finalized 2028 rule if the law changes.

No electricity tariff increase is confirmed as of October 24. What matters next is whether the bond ceiling law changes, what funding plan KEPCO and the government announce and how large industrial power demand evolves.