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Argentina

Argentina mainly uses CUIT for tax registration, CUIL for labour and social-security identification, CDI for cases where a holder needs an Argentine identification key without the relevant CUIT or CUIL, and CIE for certain foreign investors.

AR ARG 5 TIN types Last reviewed 2026-04-19

TIN types

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

Validate Argentina TIN
Argentina Tax Identification Number (CUIT) - Persons
Current Individuals

Agencia de Recaudaci贸n y Control Aduanero (ARCA)

Tax identifier used for natural persons who need Argentine tax registration, including current cases that previously relied on personal CDI.

Details
Examples
20-12274306-4 27-22685305-2
Where to find it

On ARCA registration proofs and other ARCA tax-registration records.

Common names
CUIT Clave 脷nica de Identificaci贸n Tributaria
Structure
1-2 Prefix Person prefix assigned within the CUIT namespace.
3-10 Body Core numeric identifier for the holder.
11 Verifier Check digit.
Official source
argentina.gob.ar oecd.org afip.gob.ar servicioscf.afip.gob.ar
Argentina Tax Identification Number (CUIT) - Entities
Current Entities

Agencia de Recaudaci贸n y Control Aduanero (ARCA)

Tax identifier used for legal persons and other registered entities.

Details
Examples
30-70716171-6 33-12345678-0 34-12345678-7
Where to find it

On ARCA registration proofs and other ARCA tax-registration records.

Common names
CUIT Clave 脷nica de Identificaci贸n Tributaria
Structure
1-2 Prefix Entity prefix assigned within the CUIT namespace.
3-10 Body Core numeric identifier for the entity.
11 Verifier Check digit.
Official source
argentina.gob.ar oecd.org afip.gob.ar
Argentina Workers Identification Number (CUIL)
Current Individuals

Administraci贸n Nacional de la Seguridad Social (ANSES)

Identifier used for labour and social-security administration and also commonly requested by banks and other institutions for individuals.

Details
Examples
20-12345678-6 27-70716171-5
Where to find it

On the constancia de CUIL and in ANSES records.

Common names
CUIL C贸digo 脷nico de Identificaci贸n Laboral
Structure
1-2 Prefix Person prefix assigned within the CUIL namespace.
3-10 Body Core numeric identifier for the holder.
11 Verifier Check digit.
Official source
oecd.org argentina.gob.ar anses.gob.ar afip.gob.ar
Argentina Identification Code (CDI)
Transitional Individuals Entities

Agencia de Recaudaci贸n y Control Aduanero (ARCA)

Identifier used when a holder needs an Argentine identification key but does not have the relevant CUIT or CUIL; current issuance is narrower than older public guidance.

Details
Examples
23-12345678-5 30-12345678-1
Where to find it

On the ARCA assignment proof for the CDI and in records where a CDI was previously assigned.

Common names
CDI Clave de Identificaci贸n
Official source
argentina.gob.ar oecd.org afip.gob.ar
Argentina Foreign Investors Code (CIE)
Current Individuals Entities

Agencia de Recaudaci贸n y Control Aduanero (ARCA)

Identifier used for certain foreign residents that make financial investments in Argentina and do not already have the relevant Argentine identification key.

Details
Examples
20-12345678-6 30-12345678-1
Common names
CIE Clave de Inversores del Exterior
Official source
argentina.gob.ar serviciosweb.afip.gob.ar