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:
| Position | Field | Length | Meaning & Rule | Example |
|---|---|---|---|---|
| 1 & 2 | Taxpayer Category | 2 digits | 30 (Corporations), 33 (Public/Financial Entities), 34 (Special Corps), 20/27 (Individuals) | 30 |
| 3 to 10 | Registration Serial | 8 digits | Unique corporate registration or civil DNI | 12345678 |
| 11 (trailing) | Check Digit | 1 digit | Official 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. Multiply first 10 digits by weights [5, 4, 3, 2, 7, 6, 5, 4, 3, 2].
- 2. Sum all products.
- 3. Remainder = Sum % 11.
- 4. If Remainder is 0, DV = 0. If Remainder is 1, DV = 9.
- 5. Otherwise, DV = 11 - Remainder.
- 6. Matching check digit confirms validity.