Industry accounts for 14.9 GW of the 47.4 GW of new electricity demand covered by the plan. Renewable hydrogen and its derivatives are allocated 12.4 GW; data centres account for 9.3 GW.
Vice-President and Ecological Transition Minister Sara Aagesen presented the transmission plan to the Congressional Permanent Deputation on 12 November 2026. It sets out €17.142 billion in investment through 2030, 30% above the proposal put to public consultation and 146% above the current plan. The Ministry for the Ecological Transition and the Demographic Challenge (MITECO) said the new plan provides for almost 150% more investment than the current planning framework. Investment under that framework had itself risen 50% over the preceding plan.
The demand forecast is 2,200% higher than the 2 GW in the existing plan. MITECO said the new plan accommodates approximately 47 GW of demand from the transmission grid, 23.5 times the current plan’s 2 GW. The approximately 47 GW figure is 71% higher than the volume in the proposal initially submitted for public consultation, after the ministry assessed 2,566 submissions. After industry, hydrogen and data centres, allocations include 6 GW for housing and territorial development. Transport electrification receives 2.5 GW. Ports get 1.8 GW, while railway corridors receive 0.5 GW.
The figures are up from the draft presented in September 2025, which proposed €13.59 billion in investment and 27 GW of new demand. According to Aagesen’s presentation, that draft had already multiplied the demand identified in 2022 by 14.
The plan also provides for 6,707 kilometres of new lines and repowering 8,164 kilometres. It includes 193 new substations. Alongside those, 301 positions support distribution and 162 support consumption; another 269 are for generation and storage. MITECO said the 193 substations represent a 45% increase compared with the current plan.
Aagesen said the allocations focus on mature projects, including proposals from existing industries and housing, as well as essential public services. Data centres that had already applied for connections are also included. She said the approach was intended to limit speculative applications and stop applicants from hoarding grid access points.
The housing allocation is a marked increase on earlier planning rounds, which provided for less than 400 MW, she said. Aagesen compared the new 6 GW with one and a half times the demand of the Community of Madrid. She also said it matched the needs of three million highly electrified homes.
A separate decree issued the previous summer raised investment ceilings relative to GDP. MITECO identifies it as Royal Decree 640/2026, adopted in July 2026. The measure could allow up to €17.9 billion in additional investment: €7.7 billion for transmission and €10.2 billion for distribution, which has its own planning process. The ministry said the additional distribution investment includes measures for security of supply and anticipatory investment. Previously, the limits were 0.065% of GDP for transmission and 0.13% for distribution. These additional ceilings are separate from the €17.142 billion allocated in the transmission plan.
Aagesen said the plan followed presentations to all Spain’s autonomous communities and consideration of more than 2,500 submissions. MITECO said it assessed 2,566 submissions during the consultation process. Guillermo Mariscal, speaking for the Grupo Popular, criticised the proposal, saying that a substantial part of the investment had already been planned but not carried out. The account also noted Andalusia’s budget debate on proposed public spending, a separate regional process.
The presentation completed the final formal step identified before approval through an agreement of the Consejo de Ministros. The supplied account did not confirm that the Cabinet had adopted it.
