The Spanish data center sector is reaching a tricky moment. On June 22, the transitional period opened by Royal Decree-Law 7/2026 will end, during which demand access and connection permit holders must decide whether to assume the new capacity reservation costs, waive their permits, or significantly reduce the granted power. For an industry that has been announcing campuses of 100, 200, or even over 500 MW for months, this change is no minor matter.
Until now, part of the market operated with a relatively simple logic: secure electrical capacity, associate it with land, announce a project, and seek clients, financial partners, or buyers. In an environment of artificial intelligence, cloud computing, and power scarcity at certain nodes, having “reserved megawatts” was almost like real estate. The problem is, reserving capacity without building becomes less cheap when the grid starts demanding recurrent payments and proof of viability.
The new regime does not eliminate the need for data centers. Spain has real demand, serious investments, and clear advantages: fiber optic, renewable energy, land, geographic location, and connectivity with Europe, Africa, and Latin America. But it can help cut through the noise. From June 22, many projects will have to choose between paying for the power they claim to need, scaling back to a more realistic figure, or releasing it.
Electrical capacity is no longer a free option
Royal Decree-Law 7/2026 replaces the previous guarantee scheme with a capacity reservation service. In practice, demand access and connection permit holders from 1 kV onwards must pay the network operator to keep that capacity reserved until the project is operational.
The regulation allows these payments to be offset later against transmission and distribution tolls once the installation starts up. In the first year, 100% of what was paid would be credited; in subsequent years, 80%. This approach does not consider it a lost cost if the project materializes. However, it penalizes those who reserve capacity for years without building.
| Promoter’s situation | Practical consequence |
|---|---|
| Has a mature project, client, and schedule | Can assume the service as an operational advance |
| Has land and permits, but no client | Must decide whether to pay or scale down capacity |
| Has oversized reservation | Can adjust capacity to a more realistic figure |
| Has a speculative project | Reservation starts to become costly |
| Not paying the service | Risk of automatic permit expiry |
| Renunciating within the transitional period | Previous guarantees are not executed |
This change introduces a discipline that the market needed. If a data center project has no client, secured financing, technical design, construction schedule, or energy strategy, it becomes difficult to justify keeping hundreds of megawatts on hold. And if the promoter reduces capacity by more than 50%, at least it acknowledges that the initial figure wasn’t as firm as it seemed.
The most probable outcome is a release of capacity at various nodes. That doesn’t mean network problems will disappear. Madrid and Barcelona will remain under pressure, and some specific locations will continue to be challenging. But the artificial saturation caused by oversized requests or projects closer to commercial presentations than real development could diminish.
Spain has plenty of projects, but not all will come to fruition
Context helps understand the magnitude of this moment. According to SpainDC, installed IT capacity in commercial data centers in Spain reached 439 MW at the end of 2025, a 24% increase over 2024. The association projects that, if the trend continues, the sector could reach 2,537 MW by 2030—a sixfold increase. It also estimates potential direct and indirect investments of up to €66.9 billion and an annual impact on GDP of €7.3 billion by the end of the decade.
These are significant figures, but it’s important to interpret them carefully. One thing is installed capacity, another confirmed pipeline, and another announced projects. The market is mixing operational centers, ongoing expansions, client campuses, land projects, electrical permits, regional plans, and long-term announcements too easily.
| Indicator | Relevant Data |
| Installed commercial IT capacity in Spain in 2025 | 439 MW |
| Growth compared to 2024 | 24% |
| SpainDC projection for 2030 | 2,537 MW |
| Potential direct and indirect investment until 2030 | €66.9 billion |
| Estimated annual GDP impact in 2030 | €7.3 billion |
| Projected direct and indirect employment in 2030 | Over 16,000 jobs |
Colliers offers a similar snapshot from the real estate and infrastructure market perspective. Aragón, Madrid, and Barcelona host a large share of new projects related to AI loads. Madrid has a current and future capacity of 792 MW IT, Barcelona has grown to 275 MW IT, and Aragón stands out with its announced projects, totaling over 1,800 MW IT planned for the next decade. Valencia, Cantabria, and Extremadura are also emerging, supported by land, connectivity, renewable energy access, and lower saturation than traditional major nodes.
Catalonia exemplifies the contrast between ambition and execution. The Generalitat has identified 26 new data center projects, with an combined capacity some sources place above 2,000 MW, compared to the 17 existing centers in the region. This gap shows how much the project pipeline can outpace actual infrastructure development.
The June 22 filtering will be healthy for the sector
The market’s initial reaction might be to see cancellations or withdrawals as bad news. Not necessarily. Eliminating weak projects can be positive for serious operators, government agencies, and the grid.
An inflated pipeline causes several issues: it blocks capacity that other projects might use, distorts land prices, fuels difficult political expectations, and complicates planning for Red Eléctrica and distribution companies. Moreover, it creates a false illusion that any land with potential access to power can become an AI campus.
The new framework requires differentiating between promoters with industrial intent and those with merely options. Promoters with hyperscale clients, financing, energy contracts, advanced engineering, and scheduling will be able to defend their reservations. Those with only land, a presentation, and round numbers in megawatts will need to reconsider.
| Project Type | What might happen after June 22 |
| Campus with secured client | Maintain or adjust capacity with minimal changes |
| Project under advanced negotiation | Can pay to retain optionality |
| Oversized project | Reduce capacity to cut costs |
| Lacking financing | Likely withdrawal or delay |
| Purely speculative project | Higher risk of cancellation |
| Industrial or strategic project | May gain priority over weak reservations |
This adjustment can also improve public discourse. Spain doesn’t need to promise hundreds of data centers without certainty about how many will actually be built. It needs feasible, connectable, financed, and efficient projects with credible energy agreements, low water footprint, skilled employment, and territorial harmony.
It won’t be a project shutdown, but a selection process
The data center industry will not stop on June 22. The demand for cloud, AI, digital sovereignty, edge computing, public services, and enterprise solutions will continue to grow. What might change is the type of projects that move forward.
Mature developments will gain value. Operators capable of serious construction, operation, and energy contracting will be better positioned. Regions that can offer real capacity, transparent processes, suitable land, connectivity, and local acceptance will also have advantages. Conversely, projects relying solely on large power reservations and market expectations will lose strength.
Aragon exemplifies why Spain will remain attractive: hosting large-scale announcements from AWS, Microsoft, and others, backed by land, renewable energy, and investment in key projects. Madrid will continue to be the primary hub due to connectivity, clients, enterprise cloud, and proximity to corporate headquarters. Barcelona and Catalonia could grow if they resolve the tension among capacity, water, land, and social approval. Valencia, Castilla-La Mancha, Extremadura, and Cantabria are also gaining prominence for offering space for less concentrated expansion.
The Spanish map could end up more distributed than it seemed. Saturation in Madrid and Barcelona does not mean Spain lacks capacity; it indicates not everything fits into the same nodes, nor can all projects demand connection where it’s most commercially convenient.
Energy becomes the new due diligence
For years, evaluating a data center started with connectivity, land, permits, client, and construction costs. Now, energy has become the primary filter. It’s not enough to say renewables will be used or green electricity will be purchased; access, capacity, contracts, grid schedule, substation, redundancy, costs, and demand curve compatibility must be demonstrated.
AI complicates this even further. Rack densities are rising, campuses are designed for more intensive loads, and client timelines are more aggressive. Projects that could previously be deployed gradually now face clients demanding capacity availability within very specific windows.
| Critical Question | Why it matters |
| Is the power conceded or just requested? | Distinguishes between project and aspiration |
| When will the connection be available? | Determines the real construction schedule |
| Is there a client or just marketing? | Affects financing and scale |
| Is the requested power oversized? | Can increase reservation costs |
| Is there a credible energy contract? | Reduces operational risk |
| Does the region accept the project? | Prevents social and political blocking |
| Is cooling feasible? | Water and efficiency are sensitive points |
From now on, serious announcements should focus less on slogans and more on hard data: phased IT power, requested and granted electrical power, access point status, cooling model, construction timeline, water consumption, renewable use, actual direct employment, and target clients.
Phasing out ghost projects would be a positive development
The Spanish data center industry doesn’t need less ambition; it needs more credibility. If the new capacity reservation fee eliminates ghost projects or curbs inflated figures, the sector will emerge stronger. Genuine operators will face less fictitious competition over the grid. Authorities will be able to plan better. And investors will be able to distinguish more easily between solid pipelines and mere noise.
It could also have a beneficial ripple effect on other industrial uses. The electric grid isn’t just for data centers; it also needs to connect homes, factories, hydrogen projects, port electrification, transportation, storage, self-consumption, batteries, industrial parks, and emerging industries. Reserving capacity for immature projects isn’t neutral—it displaces other uses.
June 22 won’t solve all problems—investments in grid infrastructure, administrative coordination, objective priority criteria, and territorial planning will still be needed. But it can send a clear signal of seriousness: anyone seeking megawatts will have to accept that reservation comes at a cost.
Spain can become a relevant digital hub in Europe, but not through press releases alone. It will do so if it turns announcements into operational, connected, efficient, and sustainable centers. The post-screening market might be less noisy in headlines, but it could be more tangible and real.
Frequently Asked Questions
What changes on June 22 for data center projects?
The three-month transitional period from the entry into force of RDL 7/2026 ends. Demand permit holders must decide whether to assume capacity reservation costs, waive or adjust their permits if they don’t want to keep all granted power.
Does this mean data centers in Spain will be canceled?
Not necessarily. Most likely, immature, oversized, or unclear projects will be canceled or scaled back. Projects with financing, a client, advanced permits, and a real schedule should continue.
How many data centers are projected in Spain?
No single, uniform public registry exists for all projects. Sector references are often in MW: SpainDC estimates 439 MW installed in 2025, reaching up to 2,537 MW by 2030. In Catalonia, for example, 26 new projects have been identified, while Aragón, Madrid, and Barcelona concentrate much of the pipeline.
Why is electrical power so critical for a data center?
Because it determines whether a project can truly function. A data center needs sufficient electrical connection, redundancy, competitive energy costs, and a clear grid connection schedule. Without available power, a project may have land and design, but no operational capacity.
