EU minimum performance standards for data centres: Q2 2027 prep guide

Summary. Not yet. On 7 November 2026 no EU law sets minimum energy or water performance standards for data centres. The European Commission opened a 12-week call for evidence and public consultation on 21 September 2026, which closes on 14 December 2026, and plans to propose a Regulation in the second quarter of 2027. It wants new or retrofitted sites to meet minimum levels for energy, water, waste-heat reuse, grid services and other criteria, and its report names PUE, WUE and REF as candidate indicators, adjusted for size, age, climate and location. No numbers have been proposed. Already law: Delegated Regulation (EU) 2024/1364 makes operators of sites with at least 500 kW of installed IT power report KPIs to an EU database by 15 May each year. Adopted but not yet in force: a delegated regulation of 21 September 2026 that grades sites from A to G on PUE and WUE, with the first labels due by 15 August 2027. In the first reporting round 770 sites reported, the energy-weighted average PUE was 1.36, and roughly half were above a PUE of 1.5, a WUE of 0.4, or both. Operators should answer the consultation, clean up their 2026 data and work out their likely label class now. Colocation buyers should add label and data-sharing clauses to contracts.

About this article. For data centre operators, developers, colocation providers and buyers, including non-EU firms with EU sites or customers. On 7 November 2026 we checked every date, number and legal reference against primary sources: the call for evidence Ares(2026)8908107, the Have Your Say record, report COM(2026) 500, the Commission's text of the rating act C(2026) 3472 of 21 September 2026 (not yet in the Official Journal), Directive (EU) 2023/1791 and Delegated Regulation (EU) 2024/1364 as published in the Official Journal, proposal COM(2026) 502, and Germany's EnEfG as shown on gesetze-im-internet.de with Bundestag printed paper 21/8027 of 16 September 2026. This is not legal advice, statements about the future standards can change, and no vendor paid for inclusion. Researched with AI assistance and reviewed by our editorial team.

Proposed, adopted or in force: the status on 7 November 2026

Three kinds of EU text are in play, and much commentary blurs them. The table separates what binds operators today from what is only planned.

The Have Your Say record lists the expected act as a proposal for a Regulation of Parliament and Council, flags it as a major initiative and schedules it for April to June 2027. The call for evidence names DG Energy Unit B2 as lead, gives Article 194(2) of the Treaty on the Functioning of the EU as the legal basis and expects the impact assessment in Q4 2026. A Regulation would apply directly in every Member State, without national transposition.

The rating act is the one to watch first. It enters into force only if neither Parliament nor Council objects within two months of notification, a period either can extend by two months. They may object but cannot change the text. Once published in the Official Journal, it enters into force 20 days later. Commission documents already call it Delegated Regulation (EU) 2026/7000, but on 7 November 2026 EUR-Lex returned no Official Journal entry for that number.

A supporting study by VM Europe with Viegand Maagøe (lead), Borderstep and VHK started in late January 2026 and runs for about 24 months, building on the first two reporting cycles, 2024 and 2025.

Reporting, rating, then floors: the EU's three steps

The call for evidence sets out the sequence: reporting under Delegated Regulation (EU) 2024/1364 for transparency, the rating scheme and label to promote good practice, then minimum performance standards to phase out the worst technologies and practices. The standards build on the first two steps, so the KPIs operators already report are the raw material.

The Commission report says thresholds should be ambitious but realistic and derived from reported data and reviews of other frameworks, naming Germany's Energy Efficiency Act (EnEfG), China's GB 40879-2021 standard and the industry's Climate Neutral Data Centre Pact. The call for evidence adds a political reason: one EU framework would avoid divergent national approaches. Whether stricter national limits such as Germany's would survive alongside an EU floor is one of the points the proposal will have to settle. Our EnEfG renewable-energy explainer covers the German side.

What the standards could cover

None of what follows is draft legal text.

Performance areas. The call for evidence and the Commission's questions and answers list five areas: energy efficiency, water use, waste-heat reuse, services to the grid, and other selected sustainability criteria. The Commission report says the standards could set thresholds for PUE, WUE and REF, or a combination of them.

Which sites. The call for evidence aims at all new or retrofitted data centres. The report says the initiative anticipates a timeframe for existing data centres to comply, and Article 12(5) of the Directive expressly allows one. New builds and major retrofits look like the first target, with a transition period of unknown length for the existing fleet.

Differentiation. The report wants thresholds tailored to size, age, climate and location. A single EU-wide PUE number is therefore unlikely. Bands by size or climate, or adjustments using the cooling degree days the database already records, are plausible; the Commission has not chosen.

Review. The call for evidence says the standards would be reviewed regularly to track technology. The rating act already has a review due by 31 December 2028 and every three years after that.

Consultation questions. The Commission wants evidence on whether standards are needed and feasible, which indicators should carry minimum levels and what the thresholds should be.

What the first reporting data shows

The Commission's report COM(2026) 500 analyses the first reporting period: data for 2023, submitted between May and September 2024. It is the best public guide to where floors might land. Averages below are weighted by each site's total energy use.

Only 770 sites reported, about 36% of the estimated in-scope population, and the Commission rated 70.1% of the data as reliable; preliminary second-round data covers at least 30% more sites. The sample may not represent the sites that stayed silent.

The report finds that roughly half of reporting data centres exceed a recommended baseline of PUE 1.5, WUE 0.4, or both. The underlying distribution comes from the second technical report of the 2025 study. These baselines are analysis, not proposals, but they show the scale of change if a floor landed near them.

Run the averages through the adopted label classes. A PUE of 1.36 sits just inside class D (above 1.35 up to 1.5); the 1.64 average for sites of 500 kW to 1 MW falls in class E; a WUE of 0.58 is class D. Once the rating act applies, WUE uses freshwater input instead of total water input, so first-period values are not directly comparable with future labels.

The report also notes that much renewable sourcing came through power purchase agreements and guarantees of origin not necessarily tied to local production or new capacity. The rating act responds by showing on the label how much renewable or nuclear energy comes from PPAs and guarantees of origin linked to plants commissioned or substantially refurbished within ten years before the reporting year, with time and location matching for guarantees of origin. Expect any REF-type floor to face the same questions about additionality.

How the rating scheme and CADA link in

The Commission says the rating scheme will be used to assess data centre sustainability in other EU laws, including the Cloud and AI Development Act, and that it was considered in the review of the Taxonomy delegated acts.

The Commission proposed CADA on 3 June 2026. Its aims include at least tripling EU data centre capacity within five to seven years, faster permitting, and better access to energy, land, water and financing. The proposal points to the Directive's rating scheme to identify sustainable data centres. It would also require Member States that set sustainability requirements in data centre acceleration zones to use the KPIs of Delegated Regulation (EU) 2024/1364, and one of its research challenges targets an EU average PUE of 1.15.

The label class is therefore likely to become a reference point for permits, procurement and incentives, though the final CADA text will decide how far. For a colocation buyer, a site's label could affect costs and options well before any minimum standard applies.

Reference points the Commission has named

No EU threshold exists yet. These are the numbers a proposal is likely to draw on.

The German bill had its committee hearing on 5 October 2026; we found no final vote by 7 November. The label annex prints no WUE unit. The 2024 regulation calculates WUE with IT energy in MWh, giving m³/MWh (the same number as litres per kWh), the unit of the Commission report. The rating act's new formula says kWh, which read literally would scale values a thousandfold, so we read the classes as m³/MWh; confirm with your national contact point.

Decision table: if you are X, do Y

The rows draw on the rating act's colocation and voluntary-reporting rules and the report's note on Germany's 300 kW threshold.

Worked example: a 2 MW site against plausible floors

A hypothetical site with invented figures; the floors tested are the Commission's reference baselines, not proposed law, and the classes come from the rating act annex.

A colocation hall with 2 MW of installed IT power, built in 2016 and using evaporative cooling, reports these 2026 values:

• IT energy (EIT): 12,000 MWh, an average IT load of about 1.37 MW (12,000 ÷ 8,760 hours), or roughly 68% of installed power

• Total facility energy (EDC): 18,600 MWh

• Freshwater input: 9,000 m³

Step 1: compute the KPIs. PUE = 18,600 ÷ 12,000 = 1.55. WUE = 9,000 m³ ÷ 12,000 MWh = 0.75 m³/MWh.

Step 2: map to label classes. A PUE of 1.55 falls in class E (above 1.5, up to 1.7). A WUE of 0.75 also falls in class E (above 0.6, up to 0.8).

Step 3: test a PUE floor of 1.5. At the same IT load, total energy would need to fall to 12,000 × 1.5 = 18,000 MWh. Non-IT overhead drops from 6,600 MWh to 6,000 MWh, a cut of 600 MWh. That is about 9.1% of overhead (600 ÷ 6,600), or 3.2% of total consumption (600 ÷ 18,600), and it would also move the site into class D.

Step 4: test a WUE floor of 0.4. Freshwater would need to fall to 0.4 × 12,000 = 4,800 m³, a cut of 4,200 m³, or about 47% (4,200 ÷ 9,000).

Step 5: check the trade-off. Cutting evaporative cooling to meet the water target can raise chiller and fan energy, pushing PUE back up. Metered evidence that a combined floor is out of reach in your climate without a full cooling replacement is exactly what the consultation wants, and it supports climate-adjusted thresholds.

For buyers: even a mid-table site could face a real retrofit if floors land near these baselines, so ask who pays before signing a multi-year contract.

India, US and other non-EU companies

EU data centre rules apply where the facility is, not by who owns it. An Indian IT services firm or US SaaS company running its own enterprise data centre in the EU with at least 500 kW of installed IT power is a reporting operator under Delegated Regulation (EU) 2024/1364 and would be covered by any standards. Colocation tenants are not the operator, because the regulation gives that role to whoever manages the whole site. They will still be asked for equipment data and will see their provider's label.

For Indian teams serving EU clients, the label will most likely appear first in procurement questionnaires, so keep a register of each EU site's operator, expected label class and renewable sourcing. Data residency and privacy duties under GDPR or India's DPDP Act are separate and are not changed by these energy rules; our DPDP Rules checklist covers the Indian side.

Preparation checklist

Before 14 December 2026

• Answer the consultation on Have Your Say with metered evidence on retrofit costs, climate effects and the PUE and WUE trade-off.

• Register your interest with the supporting study team so you are invited to its technical workshops.

Before 15 May 2027

• File 2026 data to the European database. Our 15 May 2027 reporting guide covers the KPIs and the submission steps.

• Check your EIT measurement point. The Commission calculates PUE from the energy values you report. The rating act wants IT energy measured at the rack (category 3 of EN 50600-4-2), with the PDU (category 2) as a fallback. In our reading, rack-level readings leave PDU losses out of IT energy, so PUE comes out slightly higher, which matters near a class boundary.

• Record freshwater separately from total water, back-up generator energy separately from total energy, and whether each site is waste heat reuse ready. The rating act adds or changes all three fields.

Before and after the Q2 2027 proposal

• Model your label class and two or three floor scenarios for every site, and put retrofit capex into the 2027 to 2029 budget.

• Colocation buyers: add clauses on label disclosure, tenant data sharing, retrofit notice and sharing the cost of new standards.

• On publication, check the transition period, how thresholds vary by size and climate, enforcement, and how CADA uses the label.

• In Germany, track the EnEfG amendment alongside the EU text. The July 2027 PUE deadline comes first.

How eCorpIT can help

eCorpIT is a Gurugram-based technology organisation, founded in 2021, assessed at CMMI Level 5 and MSME certified, with senior-led engineering teams working across AWS, Microsoft and Google platforms. Our data centre and cloud networking services cover metering design that traces PUE and WUE back to measurement points, colocation assessments on reported KPIs and expected label class, and migration plans for estates that would struggle with stricter floors. Talk to us at /contact-us/.

Last updated: 7 November 2026.

References

1. Data centres in Europe: minimum performance standards, initiative 19293 (read via the Have Your Say API) — European Commission

1. Call for evidence for an initiative with an impact assessment, Ares(2026)8908107, 21 September 2026 — European Commission

1. Report on the energy efficiency of data centres in the EU, COM(2026) 500 final, 21 September 2026 — European Commission via EUR-Lex

1. Commission Delegated Regulation (EU) 2024/1364 on the first phase of the establishment of a common Union rating scheme for data centres, OJ L 17 May 2024 — EUR-Lex

1. Commission Delegated Regulation establishing a common Union rating scheme for data centres, C(2026) 3472 final, 21 September 2026, with annexes — European Commission via EUR-Lex

1. Directive (EU) 2023/1791 on energy efficiency (recast), Articles 12 and 34, OJ L 231 of 20 September 2023 — EUR-Lex

1. Proposal for a Regulation on Europe's cloud and AI ecosystem (Cloud and AI Development Act), COM(2026) 502 final, procedure 2026/0138/COD — EUR-Lex

1. Commission enhances energy efficiency and sustainability of data centres in the EU, IP/26/1667, 21 September 2026 — European Commission

1. EUR-Lex search for Delegated Regulation (EU) 2026/7000, checked 7 November 2026 — Publications Office of the European Union

1. Minimum performance standards for EU data centres (preparatory study) — European Commission, DG Energy

1. Energy performance of data centres — European Commission, DG Energy

1. Questions and answers on the data centre energy efficiency package, 21 September 2026 — European Commission, DG Energy

1. Proposal for the Cloud and AI Development Act (CADA), 3 June 2026 — European Commission, Shaping Europe's digital future

1. Cloud and AI Development Act — European Commission, Shaping Europe's digital future

1. Section 11 EnEfG, Klimaneutrale Rechenzentren — Gesetze im Internet, Federal Ministry of Justice

1. Drucksache 21/8027, government bill to accelerate transposition of the Energy Efficiency Directive, 16 September 2026 — Deutscher Bundestag

1. Self-Regulatory Initiative — Climate Neutral Data Centre Pact

1. Umsetzung der EU-Richtlinie zur Energieeffizienz, hib 774/2026, 5 October 2026 — Deutscher Bundestag

1. Frequently asked questions on the European database on data centres, version 1.9, September 2026 — European Commission, DG Energy