The UID (Unternehmens-Identifikationsnummer) is the unique identifier assigned to every company, association, and self-employed person registered in Switzerland. It is managed by the Federal Statistical Office (BFS).
Format: CHE-XXX.XXX.XXX — the prefix CHE identifies Switzerland (ISO 3166-1), followed by 9 digits with dot separators.
For VAT-registered companies the UID is extended with the suffix MWST (or TVA / IVA): CHE-123.456.789 MWST. This combined number must appear on Swiss invoices.
Key facts
- Administered by Federal Statistical Office (BFS)
- Format:
CHE-123.456.789 - VAT variant:
CHE-123.456.789 MWST - Required field on all Swiss invoices and e-invoices