What are the five levels of WZ 2025?

WZ 2025 has five levels. The first four levels are the European levels: section, division, group and class. The fifth level is the German subclass, added for national interests and needs. Destatis states that WZ agrees completely with NACE up to and including the fourth level, the class, and that the subclass is inserted as a fifth, deepest level. Each level sits inside the level above it, and each lower category belongs to exactly one category above, except where the classification server keyword index points a keyword to more than one heading for search purposes.

The hierarchy is the structure of the classification. The keyword index is a finding aid. The two must not be confused: a keyword that appears under two headings in an index does not mean that an activity belongs to two classes at once.

What does each level contain?

A section is the broadest grouping, identified by one letter. A division narrows the section, identified by two digits. A group narrows the division, identified by three digits. A class is the most detailed European level, identified by four digits. A subclass narrows the class further, for German national purposes. Destatis describes the subclass as the fifth, deepest level, and states that the newly developed national WZ, WZ 2025, was officially approved by the European Commission, Eurostat, in November 2024 (FIXED), under Article 4 of Regulation (EC) No 1893/2006. Approval under that article concerns the consistency of the national classification with the European structure. It does not concern any individual entry, and it does not decide any question for a specific business.

Level	Identifier form	Level above
Section	One letter	None, broadest level
Division	Two digits	Section
Group	Three digits	Division
Class	Four digits	Group
Subclass	Fifth level, German specific	Class

The table above shows the nesting. Identifier forms for the first four levels follow the European structure as stated in the EUR-Lex summary. The subclass row states no identifier form, because none was stated in the Destatis passages fetched for this work.

Why does Germany add a fifth level?

Germany adds a fifth level because national statistics and national users need more detail than the European class level provides in some areas. Destatis states that the subclass serves national interests and needs, and that the aim in developing the national structure was to take account of information needs beyond NACE. A fifth level lets German statistics break a class into finer headings where German users need the breakdown, without changing the European headings above it. The finer headings remain inside their class, so that figures can be added back to class level for European comparison. A reader who works only with European statistics can ignore the fifth level. A reader who works with German statistics at the finest level must use it, and must state that the breakdown is German specific when comparing with other countries.

How should the fifth level be read?

The fifth level should be read as a subdivision of its class, never as a heading that stands alone. A subclass code without its class is incomplete, because the subclass gains its meaning from the class above it. A reader should therefore always cite the full code, with the version, and should check the note or description for the subclass in the WZ structure on the classification server. Where a subclass heading has no separate explanatory note in the material checked, the note for the class above it governs the reading, and the subclass title alone should not be treated as a full definition. This guide does not assert subclass titles or notes, because none were verified on a Destatis page fetched for this work. The structure and the keyword index on the classification server are the places to check them.

What does the level structure not decide?

The level structure does not decide the code for any reader, and it does not decide tax, licensing, funding or collective agreement questions. Levels describe how headings nest. They do not describe how a business should be treated by any authority. A specific unit entry is confirmed with the register holding it, while a heading meaning is confirmed in the Destatis WZ structure. This site holds no register and decides no entry. A reader who confuses nesting with entitlement, treating a deeper level as a more specific legal status, misreads the classification. Depth in the hierarchy means finer statistical grouping. It means nothing else.

Four European levels plus a German subclass make the five levels of WZ 2025, the subclass stays inside its class for European comparison, and Destatis publishes the structure on the classification server. ”