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Argentine CUIT Tax ID Generator

Generate and format valid 11-digit Argentine CUIT tax identification numbers for software QA testing.

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About the Argentine CUIT

The CUIT is the 11-digit tax ID issued by ARCA (formerly AFIP) in Argentina.

It uses prefix codes (20, 23, 24, 27 for individuals; 30, 33, 34 for corporations) and a weighted modulo 11 check digit.

Anatomy & Structure of Argentine CUIT (ARCA / AFIP)

The 11-digit fiscal CUIT in Argentina comprises 3 sections:

PositionFieldLengthMeaning & RuleExample
1 & 2Taxpayer Category2 digits30 (Corporations), 33 (Public/Financial Entities), 34 (Special Corps), 20/27 (Individuals)30
3 to 10Registration Serial8 digitsUnique corporate registration or civil DNI12345678
11 (trailing)Check Digit1 digitOfficial Modulo 11 check digit using factors [5, 4, 3, 2, 7, 6, 5, 4, 3, 2]4

Official CUIT Validation Algorithm (ARCA Modulo 11)

ARCA (AFIP) prescribes the official weighted Modulo 11 formula:

Remainder = (Σ (d[i] × [5, 4, 3, 2, 7, 6, 5, 4, 3, 2][i])) % 11
  1. 1. Multiply first 10 digits by weights [5, 4, 3, 2, 7, 6, 5, 4, 3, 2].
  2. 2. Sum all products.
  3. 3. Remainder = Sum % 11.
  4. 4. If Remainder is 0, DV = 0. If Remainder is 1, DV = 9.
  5. 5. Otherwise, DV = 11 - Remainder.
  6. 6. Matching check digit confirms validity.

Frequently Asked Questions