Argentina CUIT/CUIL Generator
GeneratorGenerate a checksum-valid Argentina CUIT/CUIL number for testing, for individuals or companies. Computes the correct mod-11 check digit so the result passes this site's own CUIT validator. For testing purposes only.
About this tool
About Argentina CUIT/CUIL Generator
This generator produces an Argentina CUIT/CUIL (Código Único de Identificación Tributaria/Laboral) with a correctly computed mod-11 check digit, choosing a type prefix appropriate for an individual (CUIL) or a company (CUIT).
Pick individual or company and the generator selects a valid type prefix (20/23/24/27 for individuals, 30/33/34 for companies), fills in a random 8-digit body, and computes the check digit using the official weighted-sum-mod-11 formula with its documented digit substitutions, so the result always passes this site's own CUIT/CUIL validator.
Useful for testing Argentina-facing invoicing, tax registration, or payroll onboarding forms without using a real person's or company's tax number.
Runs entirely in your browser. Implements the official check-digit substitution table exactly (a computed value of 1 becomes check digit 9, not an 'invalid' case), so every generated base has a real, valid CUIT/CUIL.
Key Features
- Choose individual (CUIL) or company (CUIT) type prefixes
- Correct mod-11 check digit with the official substitution rule
- Instant copy to clipboard
- 100% browser-based, no data sent
- For testing purposes only
FAQ
Argentina CUIT/CUIL Generator — Frequently Asked Questions
What's the difference between CUIT and CUIL?
They're the same 11-digit format and checksum — CUIT (Código Único de Identificación Tributaria) is the term used for tax/business purposes, CUIL (Código Único de Identificación Laboral) for labor purposes. The only real difference is which 2-digit type prefix is used.
Is this a real CUIT/CUIL?
No. The 8-digit body is randomly generated and the check digit is computed to satisfy the checksum, so the result is not assigned to any real person or company in Argentina.
Does the generator ever fail to find a valid check digit?
No — unlike some other tax IDs on this site, every possible 10-digit CUIT/CUIL base has a valid single-digit check digit, thanks to Argentina's official substitution rule (a raw result of 1 becomes check digit 9 instead of being rejected).
Tips
- Switch between individual and company to get the matching type prefix
- Pair with the CUIT/CUIL Validator on this site to see the same checksum verified back
- These numbers are for testing only — they are not real AFIP-issued CUIT/CUIL numbers
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