Artifact GuideEU

NIS2 Annex I and II Sector Scoping

Decide whether an entity belongs in a NIS2 Annex I or Annex II sector, then classify it as essential, important, or out of scope.

Use the Directive, Commission Article 3(4) guidance, and the SME recommendation to record the sector, subsector, entity type, size-cap analysis, Member State registration facts, and reassessment trigger.

Author
Sorena AI
Published
May 9, 2026
Updated
Jul 26, 2026
Sections
5

Structured answer sets in this page tree.

Primary sources
5

Cited legal and guidance references.

Publication metadata
Sorena AI
Published May 9, 2026
Updated Jul 26, 2026
Overview

An industry label does not establish NIS2 scope. Match each service to the exact sector, subsector, and type-of-entity row in Annex I or II. Then calculate SME status, test size-independent and Member State identification paths, and apply Article 3 to classify the legal entity as essential or important.

Section 1

What should a NIS2 Annex I and Annex II scoping decision answer?

The scoping record should answer four questions: which Annex I or Annex II row applies, whether the entity meets the Article 2 scope rule, whether any regardless-of-size or Member State identification rule applies, and whether Article 3 classifies the entity as essential or important.

Do not treat the Annex labels as broad industry tags. Annex I and Annex II name specific types of entities, and several rows include exclusions or references to other EU definitions. Record the exact row used and the facts that support it.

  • Identify the sector, subsector, and type of entity from Annex I or Annex II.
  • Apply the Article 2 rule for medium-sized or larger entities using annual work units, turnover or balance-sheet total, and partner or linked-enterprise aggregation.
  • Check Article 2 special cases that apply regardless of size, including certain communications, trust, DNS, domain registration, critical-entity, sole-provider, systemic-risk, and public-administration cases.
  • Classify the result under Article 3 as essential, important, or out of scope, and save the reason.
Section 2

How do Annex I and Annex II divide the sectors?

Annex I covers sectors of high criticality: energy, transport, banking, financial market infrastructures, health, drinking water, waste water, digital infrastructure, ICT service management for business-to-business services, public administration, and space.

Annex II covers other critical sectors: postal and courier services; waste management where it is the undertaking's principal economic activity; specified chemical activities; food businesses engaged in wholesale distribution and industrial production or processing; listed manufacturing divisions; online marketplaces, online search engines, and social networking services platforms; and research organisations.

The rows are narrower than their headings. Examples include electricity suppliers and system operators rather than every energy-adjacent business; healthcare providers, EU reference laboratories, and entities carrying out medicinal-product research, development, or manufacturing rather than every health supplier; and manufacturers in the listed categories for medical devices, computers and electronics, electrical equipment, machinery, motor vehicles, and other transport equipment rather than manufacturing generally.

  • Use Annex I first when the service is in energy, transport, finance, health, water, digital infrastructure, managed services, public administration, or space.
  • Use Annex II only when the activity fits the defined entity type, such as a food business engaged in wholesale distribution or industrial production or processing, a listed NACE Rev. 2 manufacturing division, or one of the three named digital-provider types.
  • Preserve each Annex qualification, such as the principal-economic-activity limit for waste management and the exclusions attached to drinking-water and waste-water entities.
  • When a business has multiple services, scope each service line separately instead of forcing one company-wide sector label.
  • Check national choices separately. Member States may extend NIS2 to local public administration and education institutions, especially those carrying out critical research, while Article 2 excludes specified public-administration activity in national security, public security, defence, and law enforcement.
Section 3

When is an Annex I or Annex II entity essential or important?

Article 3 treats some entities as essential and classifies the remaining in-scope Annex I or Annex II entities as important. Annex I entities that exceed the medium-sized-enterprise ceilings are essential. Qualified trust service providers, TLD registries, and DNS service providers are essential regardless of size.

Other Article 3 essential-entity paths include medium-sized public electronic communications network or service providers, central-government public administration entities, Member State identification under Article 2(2)(b) to (e), entities identified as critical entities under Directive (EU) 2022/2557, and, if a Member State provides for it, former operators of essential services identified before 16 January 2023.

  • Classify an Annex I entity as essential when it exceeds the medium-sized ceiling: it has at least 250 annual work units, or it has fewer than 250 but exceeds both EUR 50 million annual turnover and EUR 43 million annual balance-sheet total after the required aggregation.
  • Classify in-scope Annex I or Annex II entities that do not meet an essential-entity path as important.
  • Track national implementation because Member States can identify additional essential or important entities under Article 2(2)(b) to (e).
  • Do not assume a small or micro entity is out of scope until Article 2 regardless-of-size and Member State identification rules have been checked.
Section 4

What evidence should teams keep for sector scoping?

The evidence should let a reviewer reconstruct the classification without guessing. Keep the legal entity name, establishment and service countries, business service description, Annex row, customer-facing service, size-cap data, special-case analysis, and final classification.

For size, keep the latest approved accounting-period data, annual work units, turnover excluding VAT and other indirect taxes, balance-sheet total, ownership and voting relationships, proportional partner data, and 100% of linked-enterprise data unless already consolidated. Under the Recommendation, crossing or falling below a ceiling normally changes SME status only when it occurs over two consecutive accounting periods, so keep both periods and document any case-specific calculation issue.

Article 3(4) guidance points to practical list data: entity name, address, contact details, email addresses, IP ranges, telephone numbers, relevant sector and subsector, and Member States where in-scope services are provided. Use that as an evidence model, then follow the applicable national mechanism.

  • Store the Annex row, the service facts, and the source quote beside the classification decision.
  • Keep size support separate from sector support so finance, legal, and compliance reviewers can verify the annual work units, financial data, group aggregation, and Annex mapping.
  • Record whether Article 27 registration concepts are relevant for DNS, TLD, domain registration, cloud, data centre, CDN, managed service, managed security, marketplace, search, or social networking providers.
  • Add a reassessment trigger for new countries, new service lines, acquisitions, size-threshold changes, and Member State authority requests.
Section 5

Implementation checklist for NIS2 Annex I and Annex II scoping

Review this checklist before relying on a NIS2 sector classification in a control plan, registration response, customer answer, or board report.

Keep a narrow, cited classification that can be reassessed after changes in service scope, Member State implementation, or corporate size.

Does being in an Annex I or Annex II sector automatically make an entity subject to NIS2?

No. The Annex row identifies a covered type of entity, but Article 2 still requires medium-sized or larger status, a regardless-of-size path, critical-entity status, domain name registration services, or an applicable Member State choice or identification. The entity must also provide the service or carry out the activity in the Union.

What is the difference between essential and important entities for Annex I and Annex II scoping?

Article 3 lists the essential-entity paths, including Annex I entities above the ceilings and several special categories. In-scope Annex I or Annex II entities that do not qualify as essential are treated as important entities.

  • Annex I or Annex II sector, subsector, and type of entity are named exactly.
  • status or larger size is supported with the SME recommendation data points.
  • Regardless-of-size and Member State identification rules have been checked before marking an entity out of scope.
  • Essential versus important classification is recorded with the Article 3 paragraph relied on.
  • Registration evidence includes legal entity, address, contacts, IP ranges where applicable, service countries, and authority submission status.
  • Reassessment triggers are defined for service, country, acquisition, corporate-size, authority, and sector-specific legal changes.
Primary sources

References and citations

eur-lex.europa.eu
Referenced sections
  • Primary legal source for the checklist's scope and classification steps.
"entities of a type referred to in Annex I or II"
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