---
id: "de_widnr"
kind: "datatype"
status: "draft"
is_pii: false
categories: ["finances", "companies"]
country: ["DE"]
langs: ["common"]
quality: 90
url: "http://registry.apicrafter.io/datatype/de_widnr"
---

# German business identification number (Wirtschafts-Identifikationsnummer, W-IdNr.) (`de_widnr`)

> **Draft.** Draft records have not been reviewed yet and may be incomplete or wrong; do not treat them as authoritative for legal or compliance decisions.

Wirtschafts-Identifikationsnummer (W-IdNr., § 139c AO), the permanent number of a business, legal entity or self-employed person for German tax and administrative purposes. The Federal Central Tax Office (BZSt) has issued it in stages since November 2024. It is DE, nine digits built like the VAT number (USt-IdNr.) and a five-digit suffix (Unterscheidungsmerkmal) for each economic activity: -00001 for the first, -00002 for the second and so on. A business that already had a USt-IdNr. keeps those nine digits.

- Personal data (PII): no
- Categories: Finances and banking (finances), Companies/business/organizations (companies)
- Countries: Germany (DE)
- Languages: Common to most languages (common)
- Classification: identifier

## Detection

Regular expression (Python `re`):

```
^DE[1-9]\d{8}-\d{5}$
```

Check digit algorithm: `de_widnr`

## Examples

- `DE900979098-00001` — Synthetic number for a first economic activity
- `DE181947868-00002` — Synthetic number for a second economic activity
- `DE136695976` (invalid example) — A VAT number without the suffix
- `DE900979097-00001` (invalid example) — Check digit does not match

## Mappings

- schema_org: `taxID`

## Translations

- de: Wirtschafts-Identifikationsnummer (W-IdNr.)
- ru: Хозяйственный идентификационный номер Германии (W-IdNr.): Постоянный налоговый номер предприятия или самозанятого, который BZSt выдаёт с ноября 2024 года, - DE, девять цифр как в номере плательщика НДС и пятизначный суффикс вида деятельности (-00001).

## Sources

- doc: <https://www.bzst.de/DE/Unternehmen/Identifikationsnummern/Wirtschafts-Identifikationsnummer/wirtschaftsidentifikationsnummer_node.html>
- wikipedia: <https://de.wikipedia.org/wiki/Wirtschafts-Identifikationsnummer>

## Quality

Score 90/100. Missing: detector coverage.

JSON: <http://registry.apicrafter.io/api/v1/datatypes/de_widnr.json> · Edit: <https://github.com/apicrafter/metacrafter-registry/edit/main/data/datatypes/DE/finances/de_widnr.yaml>