Korea draws the line on what counts as an AI data center

South Korea has released draft technical criteria defining what qualifies as an AI data center (AIDC) under a new industry promotion law — the first time the government has put concrete numbers on a category that has been driving power grid anxiety nationwide.

What happened

The National Assembly passed the Special Act on AIDC Industry Promotion (a law granting tax breaks, fast-tracked permits, and other incentives to operators of AI-grade data centers) in May 2026, with full implementation set for March 2027. The Ministry of Science and ICT is now drafting the enforcement decree (시행령, the detailed regulations that give a framework law its teeth) and has settled on a two-track definition of what counts as an AIDC.

A facility qualifies as an AIDC if it meets either of these conditions:

• Absolute power test: AI equipment consumes at or above a megawatt threshold to be set by ministerial order.
• Proportional test: AI equipment draws at least 300 kilowatts (kW) and accounts for 60% or more of total ICT equipment power in the facility.

The most contested incentive — exemption from the 전력계통영향평가 (grid impact assessment, a mandatory review that evaluates whether a new large power consumer will destabilize the regional electricity grid) — is still under negotiation. The Ministry of Science and ICT is pushing for the exemption to cover facilities up to 100 megawatts (MW); the Ministry of Climate, Energy and Environment wants the ceiling set at 50 MW. A public consultation forum opens September 9, 2026, with the final decree expected before year-end.

Why Korea does it this way

South Korea’s power grid is heavily concentrated around Seoul and the surrounding Capital Region (수도권), where most existing data centers are clustered. Rapid demand from hyperscale cloud and AI workloads has made new grid connections in that area increasingly rationed, and grid operators have grown cautious about large new loads destabilizing transmission lines. The grid impact assessment was designed precisely to slow down big consumers until the grid can absorb them — which is why a blanket exemption for AI facilities is controversial. Korea has simultaneously been trying to lure AI infrastructure investment as a matter of industrial policy, creating a direct tension between grid safety and economic ambition.

What it means for you

Data center operators and investors: The two-track definition matters enormously for eligibility. A mid-size AI training cluster that clears the 60% ratio threshold could qualify even if it is below a high absolute MW bar — potentially unlocking subsidies and permit fast-lanes. Publicly listed Korean IT infrastructure and construction firms (e.g., those involved in data center colocation or power systems) are directly exposed to how generously the final decree is drawn. The 50 MW vs. 100 MW exemption gap is not trivial: the difference could determine whether a planned provincial campus gets built on schedule or waits years for a full grid review.

Regional economies: Because the grid exemption under discussion applies specifically to non-capital regions, the policy is also an implicit subsidy for provincial data center investment — a potential jobs and land-lease windfall for cities outside Seoul that have spare grid capacity.

Electricity consumers: If the exemption ceiling is set high and many large AI campuses bypass grid review, the risk of localised supply stress — and upward pressure on industrial electricity tariffs — rises. The outcome of the inter-ministry standoff will be a leading indicator.

Watch next

• September 9, 2026: Public consultation forum on the enforcement decree opens — first chance for industry and civil society to push back on the thresholds.
• End of 2026: Final decree expected; watch whether the grid exemption ceiling lands at 50 MW, 100 MW, or somewhere in between.
• March 2027: Full law implementation — the date from which AIDC designations and their associated incentives become legally operative.

Reported by Choi Ho at ET News based on industry sources; the enforcement decree has not yet been published officially and figures may change before finalisation.

Source: ET News (전자신문)