SK Hyper wants $350 billion for 5 gigawatts of Korean AI data centers: what is funded and what is not

SK Hyper, the AI data center arm of SK Telecom, says the first 5 gigawatts of its planned 15GW Korean build-out will cost about $350 billion (463 trillion won), including servers and other equipment. Chief executive Chung Suk-keun gave the figure on Bloomberg Tech: Asia, as reported by the Seoul Economic Daily on October 23, 2026. The money committed so far is a small fraction of that: SK Telecom approved up to 750 billion won, about $510 million, through 2030.

That mismatch, roughly 700 to 1 on the figures, is the story. Here is what is committed, what is hoped for and what the 15GW number means in context.

What SK Hyper says it will build

SK Telecom created SK Hyper in July 2026 as a wholly owned AI data center subsidiary. Its target is 15GW of capacity in South Korea by 2035. The first 5GW would come in phases starting in 2029, with a cluster of more than 2GW in the Yeongnam region starting with the Ulsan data center, then gigawatt-scale sites in the Chungcheong and southwestern regions. Phase two, taking the total to 15GW, depends on global customer demand, Chung said.

Chung put the scale in perspective: Korea's current data center market is about 1GW, so the first phase alone is roughly five times the country's existing capacity. That is why he says global customers are central. SK Hyper is in talks with global hyperscalers about locating AI inference hubs in Korea and wants to attract large-scale training capacity, and it names domestic sovereign and enterprise AI users plus demand from Japan, Taiwan and elsewhere in Asia as targets.

What is actually committed

The funded part is small. On July 23, 2026 SK Telecom's board approved a cash contribution of up to 750 billion won to SK Hyper through 2030, according to the Seoul-based business paper E-Daily and Light Reading: 330 billion won invested first, with the other 420 billion won released in stages as the business progresses. Light Reading converts that to $510.40 million and says SK Telecom keeps 100 percent ownership.

Chung told Bloomberg that SK Hyper is discussing financing with big tech companies and financial investors and aims to take its first outside investment in late 2026 or early 2027. It plans to raise more over the following three to four years and share costs with customers and outside investors. He said revenue could start as early as 2027, ahead of 2029, when the first data centers are scheduled for completion.

The numbers in context

Three comparisons help.

First, scale against national plans. Light Reading reports SK Hyper's 15GW is the bulk of the government's planned national total of 18.5GW by 2035. One company would carry roughly four fifths of the country's plan.

Second, scale against cost. Chung's figures imply about $70 billion per gigawatt ($350 billion divided by 5). Nvidia's Jensen Huang said during a European tour this week that "Each gigawatt datacenter is $50 billion," according to Fox News. We flag the gap without drawing a conclusion: the SK Hyper figure includes servers and other equipment, and the two numbers are not necessarily stated on the same basis.

Third, scale against power. Chung said "For the first 5GW project, we don't expect much difficulty securing power and sites." That claim is untested: Korea's grid would need to supply a multiple of the capacity currently serving all of its data centers. For how other sites have fared on power, see our tracker of AI data center sites, gigawatts and status.

What is missing

Not announced: an outside investor, a named hyperscaler customer, a chip supplier, a power purchase arrangement or a construction schedule beyond 2029. Chung says SK Hyper will confirm demand with big tech firms before investing and adjust plans as needed, which is a sensible hedge and also an admission that the first phase is conditional.

This also fits a pattern in how countries describe AI infrastructure. State-backed targets are announced in gigawatts, funded in the hundreds of millions and financed in the hundreds of billions only if customers sign. Our explainer on sovereign AI separates those three.

The timeline at a glance

• July 23, 2026: SK Telecom's board approves up to 750 billion won for SK Hyper through 2030; 330 billion won goes in first.
• October 23, 2026: Chung gives the $350 billion estimate for the first 5GW phase.
• Late 2026 or early 2027: target date for the first outside investment.
• 2027: earliest possible revenue, according to Chung.
• 2029: first phased operations.
• 2035: 15GW target.

What would change our view

We would treat the plan as financed, not aspirational, if any of these appeared: a named outside investor with a committed amount, a hyperscaler customer signing capacity for Ulsan, or a power supply agreement for the Yeongnam cluster. Until then, the figure that is funded is the parent's 750 billion won.

A note on sources: the $350 billion figure and Chung's quotes come from the Seoul Economic Daily's account of his Bloomberg interview, and we could not open the interview itself. The July facts come from two separate outlets that agree on the amount and the phasing. The romanization of the CEO's name varies between outlets, Chung Suk-keun in some and Jeong Seok-geun in others; we use the spelling in the October report.

Our take

SK Hyper is a credible entrant: it has a parent with a board-approved budget, a named first site and a stated timetable. But a $350 billion cost with $510 million committed is an ambition, not a build. The signal to watch is not another capacity target. It is the first outside investor or the first named hyperscaler contract, which Chung says could arrive within months.