Country guide

Switzerland

Switzerland uses the AHV/AVS insurance number as the tax identification number for resident individuals in the AEOI/CRS context, and the UID as the tax identification number for resident legal persons and other entities.

CH CHE 2 TIN types Last reviewed 2026-05-14

TIN types

2 published formats. Open a type to see examples, structure details, and official sources.

Validate Switzerland TIN

Swiss AHV/AVS Number (AHVN13)

Current Individuals

Central Compensation Office CCO (Centrale de compensation CdC)

Personal identifier used as the Swiss tax identification number for individuals in the AEOI/CRS context.

Details

Examples

756.1234.5678.97

Where to find it

On the Swiss health insurance card and, where issued, on the AHV/AVS insurance certificate.

Common names

AHV number AVS number OASI Number AHVN13

Structure

1-3 Country prefix Swiss ISO numeric country code.

5-8, 10-13, 15 Identifier body Nine randomly assigned digits.

16 Check digit Control digit calculated from the preceding digits.

Official source

oecd.org estv.admin.ch zas.admin.ch bsv.admin.ch fedlex.admin.ch sozialversicherungen.admin.ch

Swiss UID (Business Identification Number)

Current Entities

Federal Statistical Office FSO (Office fédéral de la statistique OFS)

Business identifier used as the Swiss tax identification number for resident legal persons and other entities in the AEOI/CRS context.

Details

Examples

CHE-999.999.996

Where to find it

In the UID register, on commercial register extracts, and on VAT returns where it may appear with a VAT suffix.

Common names

UID Unternehmens-Identifikationsnummer Business Identification Number

Structure

1-3 Country prefix Swiss ISO alpha-3 country code.

5-7, 9-11, 13-14 Identifier body Eight randomly assigned digits.

15 Check digit Control digit calculated from the preceding digits.

Official source

oecd.org estv.admin.ch uid.admin.ch bfs.admin.ch ech.ch