Argentina · CUIT
Argentina CUIT Checker
Consultar CUIT: check that an Argentine CUIT exists in the tax register and see the registered name.
What is an Argentine CUIT?
The CUIT (Clave Única de Identificación Tributaria) is Argentina’s 11-digit tax identification number, issued by ARCA, formerly AFIP. It is a 2-digit type prefix, eight digits and a check digit, usually printed XX-XXXXXXXX-X — for example 30-70308853-4 for MercadoLibre S.R.L. For individuals, the eight digits are their DNI number.
Argentine CUIT format
A type prefix, eight digits and a check digit.
(30, 33, 34 entities)
(DNI for individuals)
Example: 30-70308853-4 (MercadoLibre S.R.L., as printed in its terms and conditions).
- Prefixes: 20, 23, 24 and 27 for individuals (assigned at random since late 2021, so not an indicator of gender); 30, 33 and 34 for entities.
- Check digit: Not officially published; the common modulo-11 check matches live CUITs.
- Tax register: A valid CUIT returns the registered name. The checker does not show whether the CUIT is active, limited or inactive.
- Personal CUITs: An individual’s CUIT contains their DNI — personal data, so this page uses entity examples only.
How to check an Argentine CUIT
- 1 Find the CUIT on the supplier’s factura or constancia de inscripción.
- 2 Enter the 11 digits above, with or without hyphens. The checker looks the CUIT up in the tax register.
- 3 Check that the registered name (shown in full after sign-up) matches your supplier.
- 4 For ARCA’s own lookups and the CUIT’s status, see our CUIT verification guide.
Frequently Asked Questions
How do I check an Argentine CUIT? (¿Cómo consultar un CUIT?)
ARCA’s public Constancia de Inscripción shows a registered taxpayer’s details from the 11-digit CUIT, entered without hyphens. Our checker confirms that the CUIT exists in the tax register and returns the registered name.
What is the difference between CUIT, CUIL and CDI?
The CUIT is ARCA’s tax ID for anyone with economic activity. The CUIL is the labour and social-security ID that ANSES assigns to individuals. The CDI identified people and entities with no tax or social-security reason for either; since 2 March 2026 it is no longer issued to individuals (they get a CUIT instead) and is only for diplomatic missions and other entities without a CUIT.
What do the prefixes 20, 23, 24, 27, 30, 33 and 34 mean?
20, 23, 24 and 27 are individuals. Numbers issued since late 2021 get one of these prefixes at random, so it does not indicate gender (older numbers may follow the former male/female pattern). 30 and 33 are legal persons, and 34 is also used by entities, such as the Government of the City of Buenos Aires (34-99903208-9).
How is the CUIT check digit calculated?
ARCA has not published the formula — its official description says only that the last digit is the verification number. The de-facto standard is modulo 11 with weights 5, 4, 3, 2, 7, 6, 5, 4, 3, 2 on the first ten digits, and every live CUIT we tested passes it — but only ARCA’s register can confirm a CUIT.
Are AFIP and ARCA the same?
ARCA (Agencia de Recaudación y Control Aduanero) replaced AFIP: Decree 953/2024, published on 25 October 2024, dissolved AFIP and created ARCA as its legal successor, so CUITs issued under AFIP remain in use.
Should I enter the CUIT with hyphens?
It is usually printed as XX-XXXXXXXX-X, but official services ask for the 11 digits without hyphens. Our checker accepts either form.
Last reviewed: , against official sources.
Validate tax IDs at scale
Check Argentine CUITs and tax IDs from 100+ countries in one API call.